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Diffstat (limited to 'test/wpt/tests/resources/idlharness.js')
| -rw-r--r-- | test/wpt/tests/resources/idlharness.js | 3554 |
1 files changed, 3554 insertions, 0 deletions
diff --git a/test/wpt/tests/resources/idlharness.js b/test/wpt/tests/resources/idlharness.js new file mode 100644 index 0000000..8f741b0 --- /dev/null +++ b/test/wpt/tests/resources/idlharness.js @@ -0,0 +1,3554 @@ +/* For user documentation see docs/_writing-tests/idlharness.md */ + +/** + * Notes for people who want to edit this file (not just use it as a library): + * + * Most of the interesting stuff happens in the derived classes of IdlObject, + * especially IdlInterface. The entry point for all IdlObjects is .test(), + * which is called by IdlArray.test(). An IdlObject is conceptually just + * "thing we want to run tests on", and an IdlArray is an array of IdlObjects + * with some additional data thrown in. + * + * The object model is based on what WebIDLParser.js produces, which is in turn + * based on its pegjs grammar. If you want to figure out what properties an + * object will have from WebIDLParser.js, the best way is to look at the + * grammar: + * + * https://github.com/darobin/webidl.js/blob/master/lib/grammar.peg + * + * So for instance: + * + * // interface definition + * interface + * = extAttrs:extendedAttributeList? S? "interface" S name:identifier w herit:ifInheritance? w "{" w mem:ifMember* w "}" w ";" w + * { return { type: "interface", name: name, inheritance: herit, members: mem, extAttrs: extAttrs }; } + * + * This means that an "interface" object will have a .type property equal to + * the string "interface", a .name property equal to the identifier that the + * parser found, an .inheritance property equal to either null or the result of + * the "ifInheritance" production found elsewhere in the grammar, and so on. + * After each grammatical production is a JavaScript function in curly braces + * that gets called with suitable arguments and returns some JavaScript value. + * + * (Note that the version of WebIDLParser.js we use might sometimes be + * out-of-date or forked.) + * + * The members and methods of the classes defined by this file are all at least + * briefly documented, hopefully. + */ +(function(){ +"use strict"; +// Support subsetTestByKey from /common/subset-tests-by-key.js, but make it optional +if (!('subsetTestByKey' in self)) { + self.subsetTestByKey = function(key, callback, ...args) { + return callback(...args); + } + self.shouldRunSubTest = () => true; +} +/// Helpers /// +function constValue (cnt) +{ + if (cnt.type === "null") return null; + if (cnt.type === "NaN") return NaN; + if (cnt.type === "Infinity") return cnt.negative ? -Infinity : Infinity; + if (cnt.type === "number") return +cnt.value; + return cnt.value; +} + +function minOverloadLength(overloads) +{ + // "The value of the Function object’s “length” property is + // a Number determined as follows: + // ". . . + // "Return the length of the shortest argument list of the + // entries in S." + if (!overloads.length) { + return 0; + } + + return overloads.map(function(attr) { + return attr.arguments ? attr.arguments.filter(function(arg) { + return !arg.optional && !arg.variadic; + }).length : 0; + }) + .reduce(function(m, n) { return Math.min(m, n); }); +} + +// A helper to get the global of a Function object. This is needed to determine +// which global exceptions the function throws will come from. +function globalOf(func) +{ + try { + // Use the fact that .constructor for a Function object is normally the + // Function constructor, which can be used to mint a new function in the + // right global. + return func.constructor("return this;")(); + } catch (e) { + } + // If the above fails, because someone gave us a non-function, or a function + // with a weird proto chain or weird .constructor property, just fall back + // to 'self'. + return self; +} + +// https://esdiscuss.org/topic/isconstructor#content-11 +function isConstructor(o) { + try { + new (new Proxy(o, {construct: () => ({})})); + return true; + } catch(e) { + return false; + } +} + +function throwOrReject(a_test, operation, fn, obj, args, message, cb) +{ + if (operation.idlType.generic !== "Promise") { + assert_throws_js(globalOf(fn).TypeError, function() { + fn.apply(obj, args); + }, message); + cb(); + } else { + try { + promise_rejects_js(a_test, TypeError, fn.apply(obj, args), message).then(cb, cb); + } catch (e){ + a_test.step(function() { + assert_unreached("Throws \"" + e + "\" instead of rejecting promise"); + cb(); + }); + } + } +} + +function awaitNCallbacks(n, cb, ctx) +{ + var counter = 0; + return function() { + counter++; + if (counter >= n) { + cb(); + } + }; +} + +/// IdlHarnessError /// +// Entry point +self.IdlHarnessError = function(message) +{ + /** + * Message to be printed as the error's toString invocation. + */ + this.message = message; +}; + +IdlHarnessError.prototype = Object.create(Error.prototype); + +IdlHarnessError.prototype.toString = function() +{ + return this.message; +}; + + +/// IdlArray /// +// Entry point +self.IdlArray = function() +{ + /** + * A map from strings to the corresponding named IdlObject, such as + * IdlInterface or IdlException. These are the things that test() will run + * tests on. + */ + this.members = {}; + + /** + * A map from strings to arrays of strings. The keys are interface or + * exception names, and are expected to also exist as keys in this.members + * (otherwise they'll be ignored). This is populated by add_objects() -- + * see documentation at the start of the file. The actual tests will be + * run by calling this.members[name].test_object(obj) for each obj in + * this.objects[name]. obj is a string that will be eval'd to produce a + * JavaScript value, which is supposed to be an object implementing the + * given IdlObject (interface, exception, etc.). + */ + this.objects = {}; + + /** + * When adding multiple collections of IDLs one at a time, an earlier one + * might contain a partial interface or includes statement that depends + * on a later one. Save these up and handle them right before we run + * tests. + * + * Both this.partials and this.includes will be the objects as parsed by + * WebIDLParser.js, not wrapped in IdlInterface or similar. + */ + this.partials = []; + this.includes = []; + + /** + * Record of skipped IDL items, in case we later realize that they are a + * dependency (to retroactively process them). + */ + this.skipped = new Map(); +}; + +IdlArray.prototype.add_idls = function(raw_idls, options) +{ + /** Entry point. See documentation at beginning of file. */ + this.internal_add_idls(WebIDL2.parse(raw_idls), options); +}; + +IdlArray.prototype.add_untested_idls = function(raw_idls, options) +{ + /** Entry point. See documentation at beginning of file. */ + var parsed_idls = WebIDL2.parse(raw_idls); + this.mark_as_untested(parsed_idls); + this.internal_add_idls(parsed_idls, options); +}; + +IdlArray.prototype.mark_as_untested = function (parsed_idls) +{ + for (var i = 0; i < parsed_idls.length; i++) { + parsed_idls[i].untested = true; + if ("members" in parsed_idls[i]) { + for (var j = 0; j < parsed_idls[i].members.length; j++) { + parsed_idls[i].members[j].untested = true; + } + } + } +}; + +IdlArray.prototype.is_excluded_by_options = function (name, options) +{ + return options && + (options.except && options.except.includes(name) + || options.only && !options.only.includes(name)); +}; + +IdlArray.prototype.add_dependency_idls = function(raw_idls, options) +{ + return this.internal_add_dependency_idls(WebIDL2.parse(raw_idls), options); +}; + +IdlArray.prototype.internal_add_dependency_idls = function(parsed_idls, options) +{ + const new_options = { only: [] } + + const all_deps = new Set(); + Object.values(this.members).forEach(v => { + if (v.base) { + all_deps.add(v.base); + } + }); + // Add both 'A' and 'B' for each 'A includes B' entry. + this.includes.forEach(i => { + all_deps.add(i.target); + all_deps.add(i.includes); + }); + this.partials.forEach(p => all_deps.add(p.name)); + // Add 'TypeOfType' for each "typedef TypeOfType MyType;" entry. + Object.entries(this.members).forEach(([k, v]) => { + if (v instanceof IdlTypedef) { + let defs = v.idlType.union + ? v.idlType.idlType.map(t => t.idlType) + : [v.idlType.idlType]; + defs.forEach(d => all_deps.add(d)); + } + }); + + // Add the attribute idlTypes of all the nested members of idls. + const attrDeps = parsedIdls => { + return parsedIdls.reduce((deps, parsed) => { + if (parsed.members) { + for (const attr of Object.values(parsed.members).filter(m => m.type === 'attribute')) { + let attrType = attr.idlType; + // Check for generic members (e.g. FrozenArray<MyType>) + if (attrType.generic) { + deps.add(attrType.generic); + attrType = attrType.idlType; + } + deps.add(attrType.idlType); + } + } + if (parsed.base in this.members) { + attrDeps([this.members[parsed.base]]).forEach(dep => deps.add(dep)); + } + return deps; + }, new Set()); + }; + + const testedMembers = Object.values(this.members).filter(m => !m.untested && m.members); + attrDeps(testedMembers).forEach(dep => all_deps.add(dep)); + + const testedPartials = this.partials.filter(m => !m.untested && m.members); + attrDeps(testedPartials).forEach(dep => all_deps.add(dep)); + + + if (options && options.except && options.only) { + throw new IdlHarnessError("The only and except options can't be used together."); + } + + const defined_or_untested = name => { + // NOTE: Deps are untested, so we're lenient, and skip re-encountered definitions. + // e.g. for 'idl' containing A:B, B:C, C:D + // array.add_idls(idl, {only: ['A','B']}). + // array.add_dependency_idls(idl); + // B would be encountered as tested, and encountered as a dep, so we ignore. + return name in this.members + || this.is_excluded_by_options(name, options); + } + // Maps name -> [parsed_idl, ...] + const process = function(parsed) { + var deps = []; + if (parsed.name) { + deps.push(parsed.name); + } else if (parsed.type === "includes") { + deps.push(parsed.target); + deps.push(parsed.includes); + } + + deps = deps.filter(function(name) { + if (!name + || name === parsed.name && defined_or_untested(name) + || !all_deps.has(name)) { + // Flag as skipped, if it's not already processed, so we can + // come back to it later if we retrospectively call it a dep. + if (name && !(name in this.members)) { + this.skipped.has(name) + ? this.skipped.get(name).push(parsed) + : this.skipped.set(name, [parsed]); + } + return false; + } + return true; + }.bind(this)); + + deps.forEach(function(name) { + if (!new_options.only.includes(name)) { + new_options.only.push(name); + } + + const follow_up = new Set(); + for (const dep_type of ["inheritance", "includes"]) { + if (parsed[dep_type]) { + const inheriting = parsed[dep_type]; + const inheritor = parsed.name || parsed.target; + const deps = [inheriting]; + // For A includes B, we can ignore A, unless B (or some of its + // members) is being tested. + if (dep_type !== "includes" + || inheriting in this.members && !this.members[inheriting].untested + || this.partials.some(function(p) { + return p.name === inheriting; + })) { + deps.push(inheritor); + } + for (const dep of deps) { + if (!new_options.only.includes(dep)) { + new_options.only.push(dep); + } + all_deps.add(dep); + follow_up.add(dep); + } + } + } + + for (const deferred of follow_up) { + if (this.skipped.has(deferred)) { + const next = this.skipped.get(deferred); + this.skipped.delete(deferred); + next.forEach(process); + } + } + }.bind(this)); + }.bind(this); + + for (let parsed of parsed_idls) { + process(parsed); + } + + this.mark_as_untested(parsed_idls); + + if (new_options.only.length) { + this.internal_add_idls(parsed_idls, new_options); + } +} + +IdlArray.prototype.internal_add_idls = function(parsed_idls, options) +{ + /** + * Internal helper called by add_idls() and add_untested_idls(). + * + * parsed_idls is an array of objects that come from WebIDLParser.js's + * "definitions" production. The add_untested_idls() entry point + * additionally sets an .untested property on each object (and its + * .members) so that they'll be skipped by test() -- they'll only be + * used for base interfaces of tested interfaces, return types, etc. + * + * options is a dictionary that can have an only or except member which are + * arrays. If only is given then only members, partials and interface + * targets listed will be added, and if except is given only those that + * aren't listed will be added. Only one of only and except can be used. + */ + + if (options && options.only && options.except) + { + throw new IdlHarnessError("The only and except options can't be used together."); + } + + var should_skip = name => { + return this.is_excluded_by_options(name, options); + } + + parsed_idls.forEach(function(parsed_idl) + { + var partial_types = [ + "interface", + "interface mixin", + "dictionary", + "namespace", + ]; + if (parsed_idl.partial && partial_types.includes(parsed_idl.type)) + { + if (should_skip(parsed_idl.name)) + { + return; + } + this.partials.push(parsed_idl); + return; + } + + if (parsed_idl.type == "includes") + { + if (should_skip(parsed_idl.target)) + { + return; + } + this.includes.push(parsed_idl); + return; + } + + parsed_idl.array = this; + if (should_skip(parsed_idl.name)) + { + return; + } + if (parsed_idl.name in this.members) + { + throw new IdlHarnessError("Duplicate identifier " + parsed_idl.name); + } + + switch(parsed_idl.type) + { + case "interface": + this.members[parsed_idl.name] = + new IdlInterface(parsed_idl, /* is_callback = */ false, /* is_mixin = */ false); + break; + + case "interface mixin": + this.members[parsed_idl.name] = + new IdlInterface(parsed_idl, /* is_callback = */ false, /* is_mixin = */ true); + break; + + case "dictionary": + // Nothing to test, but we need the dictionary info around for type + // checks + this.members[parsed_idl.name] = new IdlDictionary(parsed_idl); + break; + + case "typedef": + this.members[parsed_idl.name] = new IdlTypedef(parsed_idl); + break; + + case "callback": + this.members[parsed_idl.name] = new IdlCallback(parsed_idl); + break; + + case "enum": + this.members[parsed_idl.name] = new IdlEnum(parsed_idl); + break; + + case "callback interface": + this.members[parsed_idl.name] = + new IdlInterface(parsed_idl, /* is_callback = */ true, /* is_mixin = */ false); + break; + + case "namespace": + this.members[parsed_idl.name] = new IdlNamespace(parsed_idl); + break; + + default: + throw parsed_idl.name + ": " + parsed_idl.type + " not yet supported"; + } + }.bind(this)); +}; + +IdlArray.prototype.add_objects = function(dict) +{ + /** Entry point. See documentation at beginning of file. */ + for (var k in dict) + { + if (k in this.objects) + { + this.objects[k] = this.objects[k].concat(dict[k]); + } + else + { + this.objects[k] = dict[k]; + } + } +}; + +IdlArray.prototype.prevent_multiple_testing = function(name) +{ + /** Entry point. See documentation at beginning of file. */ + this.members[name].prevent_multiple_testing = true; +}; + +IdlArray.prototype.is_json_type = function(type) +{ + /** + * Checks whether type is a JSON type as per + * https://webidl.spec.whatwg.org/#dfn-json-types + */ + + var idlType = type.idlType; + + if (type.generic == "Promise") { return false; } + + // nullable and annotated types don't need to be handled separately, + // as webidl2 doesn't represent them wrapped-up (as they're described + // in WebIDL). + + // union and record types + if (type.union || type.generic == "record") { + return idlType.every(this.is_json_type, this); + } + + // sequence types + if (type.generic == "sequence" || type.generic == "FrozenArray") { + return this.is_json_type(idlType[0]); + } + + if (typeof idlType != "string") { throw new Error("Unexpected type " + JSON.stringify(idlType)); } + + switch (idlType) + { + // Numeric types + case "byte": + case "octet": + case "short": + case "unsigned short": + case "long": + case "unsigned long": + case "long long": + case "unsigned long long": + case "float": + case "double": + case "unrestricted float": + case "unrestricted double": + // boolean + case "boolean": + // string types + case "DOMString": + case "ByteString": + case "USVString": + // object type + case "object": + return true; + case "Error": + case "DOMException": + case "Int8Array": + case "Int16Array": + case "Int32Array": + case "Uint8Array": + case "Uint16Array": + case "Uint32Array": + case "Uint8ClampedArray": + case "BigInt64Array": + case "BigUint64Array": + case "Float32Array": + case "Float64Array": + case "ArrayBuffer": + case "DataView": + case "any": + return false; + default: + var thing = this.members[idlType]; + if (!thing) { throw new Error("Type " + idlType + " not found"); } + if (thing instanceof IdlEnum) { return true; } + + if (thing instanceof IdlTypedef) { + return this.is_json_type(thing.idlType); + } + + // dictionaries where all of their members are JSON types + if (thing instanceof IdlDictionary) { + const map = new Map(); + for (const dict of thing.get_reverse_inheritance_stack()) { + for (const m of dict.members) { + map.set(m.name, m.idlType); + } + } + return Array.from(map.values()).every(this.is_json_type, this); + } + + // interface types that have a toJSON operation declared on themselves or + // one of their inherited interfaces. + if (thing instanceof IdlInterface) { + var base; + while (thing) + { + if (thing.has_to_json_regular_operation()) { return true; } + var mixins = this.includes[thing.name]; + if (mixins) { + mixins = mixins.map(function(id) { + var mixin = this.members[id]; + if (!mixin) { + throw new Error("Interface " + id + " not found (implemented by " + thing.name + ")"); + } + return mixin; + }, this); + if (mixins.some(function(m) { return m.has_to_json_regular_operation() } )) { return true; } + } + if (!thing.base) { return false; } + base = this.members[thing.base]; + if (!base) { + throw new Error("Interface " + thing.base + " not found (inherited by " + thing.name + ")"); + } + thing = base; + } + return false; + } + return false; + } +}; + +function exposure_set(object, default_set) { + var exposed = object.extAttrs && object.extAttrs.filter(a => a.name === "Exposed"); + if (exposed && exposed.length > 1) { + throw new IdlHarnessError( + `Multiple 'Exposed' extended attributes on ${object.name}`); + } + + let result = default_set || ["Window"]; + if (result && !(result instanceof Set)) { + result = new Set(result); + } + if (exposed && exposed.length) { + const { rhs } = exposed[0]; + // Could be a list or a string. + const set = + rhs.type === "*" ? + [ "*" ] : + rhs.type === "identifier-list" ? + rhs.value.map(id => id.value) : + [ rhs.value ]; + result = new Set(set); + } + if (result && result.has("*")) { + return "*"; + } + if (result && result.has("Worker")) { + result.delete("Worker"); + result.add("DedicatedWorker"); + result.add("ServiceWorker"); + result.add("SharedWorker"); + } + return result; +} + +function exposed_in(globals) { + if (globals === "*") { + return true; + } + if ('Window' in self) { + return globals.has("Window"); + } + if ('DedicatedWorkerGlobalScope' in self && + self instanceof DedicatedWorkerGlobalScope) { + return globals.has("DedicatedWorker"); + } + if ('SharedWorkerGlobalScope' in self && + self instanceof SharedWorkerGlobalScope) { + return globals.has("SharedWorker"); + } + if ('ServiceWorkerGlobalScope' in self && + self instanceof ServiceWorkerGlobalScope) { + return globals.has("ServiceWorker"); + } + if (Object.getPrototypeOf(self) === Object.prototype) { + // ShadowRealm - only exposed with `"*"`. + return false; + } + throw new IdlHarnessError("Unexpected global object"); +} + +/** + * Asserts that the given error message is thrown for the given function. + * @param {string|IdlHarnessError} error Expected Error message. + * @param {Function} idlArrayFunc Function operating on an IdlArray that should throw. + */ +IdlArray.prototype.assert_throws = function(error, idlArrayFunc) +{ + try { + idlArrayFunc.call(this, this); + } catch (e) { + if (e instanceof AssertionError) { + throw e; + } + // Assertions for behaviour of the idlharness.js engine. + if (error instanceof IdlHarnessError) { + error = error.message; + } + if (e.message !== error) { + throw new IdlHarnessError(`${idlArrayFunc} threw "${e}", not the expected IdlHarnessError "${error}"`); + } + return; + } + throw new IdlHarnessError(`${idlArrayFunc} did not throw the expected IdlHarnessError`); +} + +IdlArray.prototype.test = function() +{ + /** Entry point. See documentation at beginning of file. */ + + // First merge in all partial definitions and interface mixins. + this.merge_partials(); + this.merge_mixins(); + + // Assert B defined for A : B + for (const member of Object.values(this.members).filter(m => m.base)) { + const lhs = member.name; + const rhs = member.base; + if (!(rhs in this.members)) throw new IdlHarnessError(`${lhs} inherits ${rhs}, but ${rhs} is undefined.`); + const lhs_is_interface = this.members[lhs] instanceof IdlInterface; + const rhs_is_interface = this.members[rhs] instanceof IdlInterface; + if (rhs_is_interface != lhs_is_interface) { + if (!lhs_is_interface) throw new IdlHarnessError(`${lhs} inherits ${rhs}, but ${lhs} is not an interface.`); + if (!rhs_is_interface) throw new IdlHarnessError(`${lhs} inherits ${rhs}, but ${rhs} is not an interface.`); + } + // Check for circular dependencies. + member.get_reverse_inheritance_stack(); + } + + Object.getOwnPropertyNames(this.members).forEach(function(memberName) { + var member = this.members[memberName]; + if (!(member instanceof IdlInterface)) { + return; + } + + var globals = exposure_set(member); + member.exposed = exposed_in(globals); + member.exposureSet = globals; + }.bind(this)); + + // Now run test() on every member, and test_object() for every object. + for (var name in this.members) + { + this.members[name].test(); + if (name in this.objects) + { + const objects = this.objects[name]; + if (!objects || !Array.isArray(objects)) { + throw new IdlHarnessError(`Invalid or empty objects for member ${name}`); + } + objects.forEach(function(str) + { + if (!this.members[name] || !(this.members[name] instanceof IdlInterface)) { + throw new IdlHarnessError(`Invalid object member name ${name}`); + } + this.members[name].test_object(str); + }.bind(this)); + } + } +}; + +IdlArray.prototype.merge_partials = function() +{ + const testedPartials = new Map(); + this.partials.forEach(function(parsed_idl) + { + const originalExists = parsed_idl.name in this.members + && (this.members[parsed_idl.name] instanceof IdlInterface + || this.members[parsed_idl.name] instanceof IdlDictionary + || this.members[parsed_idl.name] instanceof IdlNamespace); + + // Ensure unique test name in case of multiple partials. + let partialTestName = parsed_idl.name; + let partialTestCount = 1; + if (testedPartials.has(parsed_idl.name)) { + partialTestCount += testedPartials.get(parsed_idl.name); + partialTestName = `${partialTestName}[${partialTestCount}]`; + } + testedPartials.set(parsed_idl.name, partialTestCount); + + if (!parsed_idl.untested) { + test(function () { + assert_true(originalExists, `Original ${parsed_idl.type} should be defined`); + + var expected; + switch (parsed_idl.type) { + case 'dictionary': expected = IdlDictionary; break; + case 'namespace': expected = IdlNamespace; break; + case 'interface': + case 'interface mixin': + default: + expected = IdlInterface; break; + } + assert_true( + expected.prototype.isPrototypeOf(this.members[parsed_idl.name]), + `Original ${parsed_idl.name} definition should have type ${parsed_idl.type}`); + }.bind(this), `Partial ${parsed_idl.type} ${partialTestName}: original ${parsed_idl.type} defined`); + } + if (!originalExists) { + // Not good.. but keep calm and carry on. + return; + } + + if (parsed_idl.extAttrs) + { + // Special-case "Exposed". Must be a subset of original interface's exposure. + // Exposed on a partial is the equivalent of having the same Exposed on all nested members. + // See https://github.com/heycam/webidl/issues/154 for discrepency between Exposed and + // other extended attributes on partial interfaces. + const exposureAttr = parsed_idl.extAttrs.find(a => a.name === "Exposed"); + if (exposureAttr) { + if (!parsed_idl.untested) { + test(function () { + const partialExposure = exposure_set(parsed_idl); + const memberExposure = exposure_set(this.members[parsed_idl.name]); + if (memberExposure === "*") { + return; + } + if (partialExposure === "*") { + throw new IdlHarnessError( + `Partial ${parsed_idl.name} ${parsed_idl.type} is exposed everywhere, the original ${parsed_idl.type} is not.`); + } + partialExposure.forEach(name => { + if (!memberExposure || !memberExposure.has(name)) { + throw new IdlHarnessError( + `Partial ${parsed_idl.name} ${parsed_idl.type} is exposed to '${name}', the original ${parsed_idl.type} is not.`); + } + }); + }.bind(this), `Partial ${parsed_idl.type} ${partialTestName}: valid exposure set`); + } + parsed_idl.members.forEach(function (member) { + member.extAttrs.push(exposureAttr); + }.bind(this)); + } + + parsed_idl.extAttrs.forEach(function(extAttr) + { + // "Exposed" already handled above. + if (extAttr.name === "Exposed") { + return; + } + this.members[parsed_idl.name].extAttrs.push(extAttr); + }.bind(this)); + } + if (parsed_idl.members.length) { + test(function () { + var clash = parsed_idl.members.find(function(member) { + return this.members[parsed_idl.name].members.find(function(m) { + return this.are_duplicate_members(m, member); + }.bind(this)); + }.bind(this)); + parsed_idl.members.forEach(function(member) + { + this.members[parsed_idl.name].members.push(new IdlInterfaceMember(member)); + }.bind(this)); + assert_true(!clash, "member " + (clash && clash.name) + " is unique"); + }.bind(this), `Partial ${parsed_idl.type} ${partialTestName}: member names are unique`); + } + }.bind(this)); + this.partials = []; +} + +IdlArray.prototype.merge_mixins = function() +{ + for (const parsed_idl of this.includes) + { + const lhs = parsed_idl.target; + const rhs = parsed_idl.includes; + + var errStr = lhs + " includes " + rhs + ", but "; + if (!(lhs in this.members)) throw errStr + lhs + " is undefined."; + if (!(this.members[lhs] instanceof IdlInterface)) throw errStr + lhs + " is not an interface."; + if (!(rhs in this.members)) throw errStr + rhs + " is undefined."; + if (!(this.members[rhs] instanceof IdlInterface)) throw errStr + rhs + " is not an interface."; + + if (this.members[rhs].members.length) { + test(function () { + var clash = this.members[rhs].members.find(function(member) { + return this.members[lhs].members.find(function(m) { + return this.are_duplicate_members(m, member); + }.bind(this)); + }.bind(this)); + this.members[rhs].members.forEach(function(member) { + assert_true( + this.members[lhs].members.every(m => !this.are_duplicate_members(m, member)), + "member " + member.name + " is unique"); + this.members[lhs].members.push(new IdlInterfaceMember(member)); + }.bind(this)); + assert_true(!clash, "member " + (clash && clash.name) + " is unique"); + }.bind(this), lhs + " includes " + rhs + ": member names are unique"); + } + } + this.includes = []; +} + +IdlArray.prototype.are_duplicate_members = function(m1, m2) { + if (m1.name !== m2.name) { + return false; + } + if (m1.type === 'operation' && m2.type === 'operation' + && m1.arguments.length !== m2.arguments.length) { + // Method overload. TODO: Deep comparison of arguments. + return false; + } + return true; +} + +IdlArray.prototype.assert_type_is = function(value, type) +{ + if (type.idlType in this.members + && this.members[type.idlType] instanceof IdlTypedef) { + this.assert_type_is(value, this.members[type.idlType].idlType); + return; + } + + if (type.nullable && value === null) + { + // This is fine + return; + } + + if (type.union) { + for (var i = 0; i < type.idlType.length; i++) { + try { + this.assert_type_is(value, type.idlType[i]); + // No AssertionError, so we match one type in the union + return; + } catch(e) { + if (e instanceof AssertionError) { + // We didn't match this type, let's try some others + continue; + } + throw e; + } + } + // TODO: Is there a nice way to list the union's types in the message? + assert_true(false, "Attribute has value " + format_value(value) + + " which doesn't match any of the types in the union"); + + } + + /** + * Helper function that tests that value is an instance of type according + * to the rules of WebIDL. value is any JavaScript value, and type is an + * object produced by WebIDLParser.js' "type" production. That production + * is fairly elaborate due to the complexity of WebIDL's types, so it's + * best to look at the grammar to figure out what properties it might have. + */ + if (type.idlType == "any") + { + // No assertions to make + return; + } + + if (type.array) + { + // TODO: not supported yet + return; + } + + if (type.generic === "sequence" || type.generic == "ObservableArray") + { + assert_true(Array.isArray(value), "should be an Array"); + if (!value.length) + { + // Nothing we can do. + return; + } + this.assert_type_is(value[0], type.idlType[0]); + return; + } + + if (type.generic === "Promise") { + assert_true("then" in value, "Attribute with a Promise type should have a then property"); + // TODO: Ideally, we would check on project fulfillment + // that we get the right type + // but that would require making the type check async + return; + } + + if (type.generic === "FrozenArray") { + assert_true(Array.isArray(value), "Value should be array"); + assert_true(Object.isFrozen(value), "Value should be frozen"); + if (!value.length) + { + // Nothing we can do. + return; + } + this.assert_type_is(value[0], type.idlType[0]); + return; + } + + type = Array.isArray(type.idlType) ? type.idlType[0] : type.idlType; + + switch(type) + { + case "undefined": + assert_equals(value, undefined); + return; + + case "boolean": + assert_equals(typeof value, "boolean"); + return; + + case "byte": + assert_equals(typeof value, "number"); + assert_equals(value, Math.floor(value), "should be an integer"); + assert_true(-128 <= value && value <= 127, "byte " + value + " should be in range [-128, 127]"); + return; + + case "octet": + assert_equals(typeof value, "number"); + assert_equals(value, Math.floor(value), "should be an integer"); + assert_true(0 <= value && value <= 255, "octet " + value + " should be in range [0, 255]"); + return; + + case "short": + assert_equals(typeof value, "number"); + assert_equals(value, Math.floor(value), "should be an integer"); + assert_true(-32768 <= value && value <= 32767, "short " + value + " should be in range [-32768, 32767]"); + return; + + case "unsigned short": + assert_equals(typeof value, "number"); + assert_equals(value, Math.floor(value), "should be an integer"); + assert_true(0 <= value && value <= 65535, "unsigned short " + value + " should be in range [0, 65535]"); + return; + + case "long": + assert_equals(typeof value, "number"); + assert_equals(value, Math.floor(value), "should be an integer"); + assert_true(-2147483648 <= value && value <= 2147483647, "long " + value + " should be in range [-2147483648, 2147483647]"); + return; + + case "unsigned long": + assert_equals(typeof value, "number"); + assert_equals(value, Math.floor(value), "should be an integer"); + assert_true(0 <= value && value <= 4294967295, "unsigned long " + value + " should be in range [0, 4294967295]"); + return; + + case "long long": + assert_equals(typeof value, "number"); + return; + + case "unsigned long long": + case "DOMTimeStamp": + assert_equals(typeof value, "number"); + assert_true(0 <= value, "unsigned long long should be positive"); + return; + + case "float": + assert_equals(typeof value, "number"); + assert_equals(value, Math.fround(value), "float rounded to 32-bit float should be itself"); + assert_not_equals(value, Infinity); + assert_not_equals(value, -Infinity); + assert_not_equals(value, NaN); + return; + + case "DOMHighResTimeStamp": + case "double": + assert_equals(typeof value, "number"); + assert_not_equals(value, Infinity); + assert_not_equals(value, -Infinity); + assert_not_equals(value, NaN); + return; + + case "unrestricted float": + assert_equals(typeof value, "number"); + assert_equals(value, Math.fround(value), "unrestricted float rounded to 32-bit float should be itself"); + return; + + case "unrestricted double": + assert_equals(typeof value, "number"); + return; + + case "DOMString": + assert_equals(typeof value, "string"); + return; + + case "ByteString": + assert_equals(typeof value, "string"); + assert_regexp_match(value, /^[\x00-\x7F]*$/); + return; + + case "USVString": + assert_equals(typeof value, "string"); + assert_regexp_match(value, /^([\x00-\ud7ff\ue000-\uffff]|[\ud800-\udbff][\udc00-\udfff])*$/); + return; + + case "ArrayBufferView": + assert_true(ArrayBuffer.isView(value)); + return; + + case "object": + assert_in_array(typeof value, ["object", "function"], "wrong type: not object or function"); + return; + } + + // This is a catch-all for any IDL type name which follows JS class + // semantics. This includes some non-interface IDL types (e.g. Int8Array, + // Function, ...), as well as any interface types that are not in the IDL + // that is fed to the harness. If an IDL type does not follow JS class + // semantics then it should go in the switch statement above. If an IDL + // type needs full checking, then the test should include it in the IDL it + // feeds to the harness. + if (!(type in this.members)) + { + assert_true(value instanceof self[type], "wrong type: not a " + type); + return; + } + + if (this.members[type] instanceof IdlInterface) + { + // We don't want to run the full + // IdlInterface.prototype.test_instance_of, because that could result + // in an infinite loop. TODO: This means we don't have tests for + // LegacyNoInterfaceObject interfaces, and we also can't test objects + // that come from another self. + assert_in_array(typeof value, ["object", "function"], "wrong type: not object or function"); + if (value instanceof Object + && !this.members[type].has_extended_attribute("LegacyNoInterfaceObject") + && type in self) + { + assert_true(value instanceof self[type], "instanceof " + type); + } + } + else if (this.members[type] instanceof IdlEnum) + { + assert_equals(typeof value, "string"); + } + else if (this.members[type] instanceof IdlDictionary) + { + // TODO: Test when we actually have something to test this on + } + else if (this.members[type] instanceof IdlCallback) + { + assert_equals(typeof value, "function"); + } + else + { + throw new IdlHarnessError("Type " + type + " isn't an interface, callback or dictionary"); + } +}; + +/// IdlObject /// +function IdlObject() {} +IdlObject.prototype.test = function() +{ + /** + * By default, this does nothing, so no actual tests are run for IdlObjects + * that don't define any (e.g., IdlDictionary at the time of this writing). + */ +}; + +IdlObject.prototype.has_extended_attribute = function(name) +{ + /** + * This is only meaningful for things that support extended attributes, + * such as interfaces, exceptions, and members. + */ + return this.extAttrs.some(function(o) + { + return o.name == name; + }); +}; + + +/// IdlDictionary /// +// Used for IdlArray.prototype.assert_type_is +function IdlDictionary(obj) +{ + /** + * obj is an object produced by the WebIDLParser.js "dictionary" + * production. + */ + + /** Self-explanatory. */ + this.name = obj.name; + + /** A back-reference to our IdlArray. */ + this.array = obj.array; + + /** An array of objects produced by the "dictionaryMember" production. */ + this.members = obj.members; + + /** + * The name (as a string) of the dictionary type we inherit from, or null + * if there is none. + */ + this.base = obj.inheritance; +} + +IdlDictionary.prototype = Object.create(IdlObject.prototype); + +IdlDictionary.prototype.get_reverse_inheritance_stack = function() { + return IdlInterface.prototype.get_reverse_inheritance_stack.call(this); +}; + +/// IdlInterface /// +function IdlInterface(obj, is_callback, is_mixin) +{ + /** + * obj is an object produced by the WebIDLParser.js "interface" production. + */ + + /** Self-explanatory. */ + this.name = obj.name; + + /** A back-reference to our IdlArray. */ + this.array = obj.array; + + /** + * An indicator of whether we should run tests on the interface object and + * interface prototype object. Tests on members are controlled by .untested + * on each member, not this. + */ + this.untested = obj.untested; + + /** An array of objects produced by the "ExtAttr" production. */ + this.extAttrs = obj.extAttrs; + + /** An array of IdlInterfaceMembers. */ + this.members = obj.members.map(function(m){return new IdlInterfaceMember(m); }); + if (this.has_extended_attribute("LegacyUnforgeable")) { + this.members + .filter(function(m) { return m.special !== "static" && (m.type == "attribute" || m.type == "operation"); }) + .forEach(function(m) { return m.isUnforgeable = true; }); + } + + /** + * The name (as a string) of the type we inherit from, or null if there is + * none. + */ + this.base = obj.inheritance; + + this._is_callback = is_callback; + this._is_mixin = is_mixin; +} +IdlInterface.prototype = Object.create(IdlObject.prototype); +IdlInterface.prototype.is_callback = function() +{ + return this._is_callback; +}; + +IdlInterface.prototype.is_mixin = function() +{ + return this._is_mixin; +}; + +IdlInterface.prototype.has_constants = function() +{ + return this.members.some(function(member) { + return member.type === "const"; + }); +}; + +IdlInterface.prototype.get_unscopables = function() +{ + return this.members.filter(function(member) { + return member.isUnscopable; + }); +}; + +IdlInterface.prototype.is_global = function() +{ + return this.extAttrs.some(function(attribute) { + return attribute.name === "Global"; + }); +}; + +/** + * Value of the LegacyNamespace extended attribute, if any. + * + * https://webidl.spec.whatwg.org/#LegacyNamespace + */ +IdlInterface.prototype.get_legacy_namespace = function() +{ + var legacyNamespace = this.extAttrs.find(function(attribute) { + return attribute.name === "LegacyNamespace"; + }); + return legacyNamespace ? legacyNamespace.rhs.value : undefined; +}; + +IdlInterface.prototype.get_interface_object_owner = function() +{ + var legacyNamespace = this.get_legacy_namespace(); + return legacyNamespace ? self[legacyNamespace] : self; +}; + +IdlInterface.prototype.should_have_interface_object = function() +{ + // "For every interface that is exposed in a given ECMAScript global + // environment and: + // * is a callback interface that has constants declared on it, or + // * is a non-callback interface that is not declared with the + // [LegacyNoInterfaceObject] extended attribute, + // a corresponding property MUST exist on the ECMAScript global object. + + return this.is_callback() ? this.has_constants() : !this.has_extended_attribute("LegacyNoInterfaceObject"); +}; + +IdlInterface.prototype.assert_interface_object_exists = function() +{ + var owner = this.get_legacy_namespace() || "self"; + assert_own_property(self[owner], this.name, owner + " does not have own property " + format_value(this.name)); +}; + +IdlInterface.prototype.get_interface_object = function() { + if (!this.should_have_interface_object()) { + var reason = this.is_callback() ? "lack of declared constants" : "declared [LegacyNoInterfaceObject] attribute"; + throw new IdlHarnessError(this.name + " has no interface object due to " + reason); + } + + return this.get_interface_object_owner()[this.name]; +}; + +IdlInterface.prototype.get_qualified_name = function() { + // https://webidl.spec.whatwg.org/#qualified-name + var legacyNamespace = this.get_legacy_namespace(); + if (legacyNamespace) { + return legacyNamespace + "." + this.name; + } + return this.name; +}; + +IdlInterface.prototype.has_to_json_regular_operation = function() { + return this.members.some(function(m) { + return m.is_to_json_regular_operation(); + }); +}; + +IdlInterface.prototype.has_default_to_json_regular_operation = function() { + return this.members.some(function(m) { + return m.is_to_json_regular_operation() && m.has_extended_attribute("Default"); + }); +}; + +/** + * Implementation of https://webidl.spec.whatwg.org/#create-an-inheritance-stack + * with the order reversed. + * + * The order is reversed so that the base class comes first in the list, because + * this is what all call sites need. + * + * So given: + * + * A : B {}; + * B : C {}; + * C {}; + * + * then A.get_reverse_inheritance_stack() returns [C, B, A], + * and B.get_reverse_inheritance_stack() returns [C, B]. + * + * Note: as dictionary inheritance is expressed identically by the AST, + * this works just as well for getting a stack of inherited dictionaries. + */ +IdlInterface.prototype.get_reverse_inheritance_stack = function() { + const stack = [this]; + let idl_interface = this; + while (idl_interface.base) { + const base = this.array.members[idl_interface.base]; + if (!base) { + throw new Error(idl_interface.type + " " + idl_interface.base + " not found (inherited by " + idl_interface.name + ")"); + } else if (stack.indexOf(base) > -1) { + stack.unshift(base); + const dep_chain = stack.map(i => i.name).join(','); + throw new IdlHarnessError(`${this.name} has a circular dependency: ${dep_chain}`); + } + idl_interface = base; + stack.unshift(idl_interface); + } + return stack; +}; + +/** + * Implementation of + * https://webidl.spec.whatwg.org/#default-tojson-operation + * for testing purposes. + * + * Collects the IDL types of the attributes that meet the criteria + * for inclusion in the default toJSON operation for easy + * comparison with actual value + */ +IdlInterface.prototype.default_to_json_operation = function() { + const map = new Map() + let isDefault = false; + for (const I of this.get_reverse_inheritance_stack()) { + if (I.has_default_to_json_regular_operation()) { + isDefault = true; + for (const m of I.members) { + if (m.special !== "static" && m.type == "attribute" && I.array.is_json_type(m.idlType)) { + map.set(m.name, m.idlType); + } + } + } else if (I.has_to_json_regular_operation()) { + isDefault = false; + } + } + return isDefault ? map : null; +}; + +IdlInterface.prototype.test = function() +{ + if (this.has_extended_attribute("LegacyNoInterfaceObject") || this.is_mixin()) + { + // No tests to do without an instance. TODO: We should still be able + // to run tests on the prototype object, if we obtain one through some + // other means. + return; + } + + // If the interface object is not exposed, only test that. Members can't be + // tested either, but objects could still be tested in |test_object|. + if (!this.exposed) + { + if (!this.untested) + { + subsetTestByKey(this.name, test, function() { + assert_false(this.name in self); + }.bind(this), this.name + " interface: existence and properties of interface object"); + } + return; + } + + if (!this.untested) + { + // First test things to do with the exception/interface object and + // exception/interface prototype object. + this.test_self(); + } + // Then test things to do with its members (constants, fields, attributes, + // operations, . . .). These are run even if .untested is true, because + // members might themselves be marked as .untested. This might happen to + // interfaces if the interface itself is untested but a partial interface + // that extends it is tested -- then the interface itself and its initial + // members will be marked as untested, but the members added by the partial + // interface are still tested. + this.test_members(); +}; + +IdlInterface.prototype.constructors = function() +{ + return this.members + .filter(function(m) { return m.type == "constructor"; }); +} + +IdlInterface.prototype.test_self = function() +{ + subsetTestByKey(this.name, test, function() + { + if (!this.should_have_interface_object()) { + return; + } + + // The name of the property is the identifier of the interface, and its + // value is an object called the interface object. + // The property has the attributes { [[Writable]]: true, + // [[Enumerable]]: false, [[Configurable]]: true }." + // TODO: Should we test here that the property is actually writable + // etc., or trust getOwnPropertyDescriptor? + this.assert_interface_object_exists(); + var desc = Object.getOwnPropertyDescriptor(this.get_interface_object_owner(), this.name); + assert_false("get" in desc, "self's property " + format_value(this.name) + " should not have a getter"); + assert_false("set" in desc, "self's property " + format_value(this.name) + " should not have a setter"); + assert_true(desc.writable, "self's property " + format_value(this.name) + " should be writable"); + assert_false(desc.enumerable, "self's property " + format_value(this.name) + " should not be enumerable"); + assert_true(desc.configurable, "self's property " + format_value(this.name) + " should be configurable"); + + if (this.is_callback()) { + // "The internal [[Prototype]] property of an interface object for + // a callback interface must be the Function.prototype object." + assert_equals(Object.getPrototypeOf(this.get_interface_object()), Function.prototype, + "prototype of self's property " + format_value(this.name) + " is not Object.prototype"); + + return; + } + + // "The interface object for a given non-callback interface is a + // function object." + // "If an object is defined to be a function object, then it has + // characteristics as follows:" + + // Its [[Prototype]] internal property is otherwise specified (see + // below). + + // "* Its [[Get]] internal property is set as described in ECMA-262 + // section 9.1.8." + // Not much to test for this. + + // "* Its [[Construct]] internal property is set as described in + // ECMA-262 section 19.2.2.3." + + // "* Its @@hasInstance property is set as described in ECMA-262 + // section 19.2.3.8, unless otherwise specified." + // TODO + + // ES6 (rev 30) 19.1.3.6: + // "Else, if O has a [[Call]] internal method, then let builtinTag be + // "Function"." + assert_class_string(this.get_interface_object(), "Function", "class string of " + this.name); + + // "The [[Prototype]] internal property of an interface object for a + // non-callback interface is determined as follows:" + var prototype = Object.getPrototypeOf(this.get_interface_object()); + if (this.base) { + // "* If the interface inherits from some other interface, the + // value of [[Prototype]] is the interface object for that other + // interface." + var inherited_interface = this.array.members[this.base]; + if (!inherited_interface.has_extended_attribute("LegacyNoInterfaceObject")) { + inherited_interface.assert_interface_object_exists(); + assert_equals(prototype, inherited_interface.get_interface_object(), + 'prototype of ' + this.name + ' is not ' + + this.base); + } + } else { + // "If the interface doesn't inherit from any other interface, the + // value of [[Prototype]] is %FunctionPrototype% ([ECMA-262], + // section 6.1.7.4)." + assert_equals(prototype, Function.prototype, + "prototype of self's property " + format_value(this.name) + " is not Function.prototype"); + } + + // Always test for [[Construct]]: + // https://github.com/heycam/webidl/issues/698 + assert_true(isConstructor(this.get_interface_object()), "interface object must pass IsConstructor check"); + + var interface_object = this.get_interface_object(); + assert_throws_js(globalOf(interface_object).TypeError, function() { + interface_object(); + }, "interface object didn't throw TypeError when called as a function"); + + if (!this.constructors().length) { + assert_throws_js(globalOf(interface_object).TypeError, function() { + new interface_object(); + }, "interface object didn't throw TypeError when called as a constructor"); + } + }.bind(this), this.name + " interface: existence and properties of interface object"); + + if (this.should_have_interface_object() && !this.is_callback()) { + subsetTestByKey(this.name, test, function() { + // This function tests WebIDL as of 2014-10-25. + // https://webidl.spec.whatwg.org/#es-interface-call + + this.assert_interface_object_exists(); + + // "Interface objects for non-callback interfaces MUST have a + // property named “length” with attributes { [[Writable]]: false, + // [[Enumerable]]: false, [[Configurable]]: true } whose value is + // a Number." + assert_own_property(this.get_interface_object(), "length"); + var desc = Object.getOwnPropertyDescriptor(this.get_interface_object(), "length"); + assert_false("get" in desc, this.name + ".length should not have a getter"); + assert_false("set" in desc, this.name + ".length should not have a setter"); + assert_false(desc.writable, this.name + ".length should not be writable"); + assert_false(desc.enumerable, this.name + ".length should not be enumerable"); + assert_true(desc.configurable, this.name + ".length should be configurable"); + + var constructors = this.constructors(); + var expected_length = minOverloadLength(constructors); + assert_equals(this.get_interface_object().length, expected_length, "wrong value for " + this.name + ".length"); + }.bind(this), this.name + " interface object length"); + } + + if (this.should_have_interface_object()) { + subsetTestByKey(this.name, test, function() { + // This function tests WebIDL as of 2015-11-17. + // https://webidl.spec.whatwg.org/#interface-object + + this.assert_interface_object_exists(); + + // "All interface objects must have a property named “name” with + // attributes { [[Writable]]: false, [[Enumerable]]: false, + // [[Configurable]]: true } whose value is the identifier of the + // corresponding interface." + + assert_own_property(this.get_interface_object(), "name"); + var desc = Object.getOwnPropertyDescriptor(this.get_interface_object(), "name"); + assert_false("get" in desc, this.name + ".name should not have a getter"); + assert_false("set" in desc, this.name + ".name should not have a setter"); + assert_false(desc.writable, this.name + ".name should not be writable"); + assert_false(desc.enumerable, this.name + ".name should not be enumerable"); + assert_true(desc.configurable, this.name + ".name should be configurable"); + assert_equals(this.get_interface_object().name, this.name, "wrong value for " + this.name + ".name"); + }.bind(this), this.name + " interface object name"); + } + + + if (this.has_extended_attribute("LegacyWindowAlias")) { + subsetTestByKey(this.name, test, function() + { + var aliasAttrs = this.extAttrs.filter(function(o) { return o.name === "LegacyWindowAlias"; }); + if (aliasAttrs.length > 1) { + throw new IdlHarnessError("Invalid IDL: multiple LegacyWindowAlias extended attributes on " + this.name); + } + if (this.is_callback()) { + throw new IdlHarnessError("Invalid IDL: LegacyWindowAlias extended attribute on non-interface " + this.name); + } + if (!(this.exposureSet === "*" || this.exposureSet.has("Window"))) { + throw new IdlHarnessError("Invalid IDL: LegacyWindowAlias extended attribute on " + this.name + " which is not exposed in Window"); + } + // TODO: when testing of [LegacyNoInterfaceObject] interfaces is supported, + // check that it's not specified together with LegacyWindowAlias. + + // TODO: maybe check that [LegacyWindowAlias] is not specified on a partial interface. + + var rhs = aliasAttrs[0].rhs; + if (!rhs) { + throw new IdlHarnessError("Invalid IDL: LegacyWindowAlias extended attribute on " + this.name + " without identifier"); + } + var aliases; + if (rhs.type === "identifier-list") { + aliases = rhs.value.map(id => id.value); + } else { // rhs.type === identifier + aliases = [ rhs.value ]; + } + + // OK now actually check the aliases... + var alias; + if (exposed_in(exposure_set(this, this.exposureSet)) && 'document' in self) { + for (alias of aliases) { + assert_true(alias in self, alias + " should exist"); + assert_equals(self[alias], this.get_interface_object(), "self." + alias + " should be the same value as self." + this.get_qualified_name()); + var desc = Object.getOwnPropertyDescriptor(self, alias); + assert_equals(desc.value, this.get_interface_object(), "wrong value in " + alias + " property descriptor"); + assert_true(desc.writable, alias + " should be writable"); + assert_false(desc.enumerable, alias + " should not be enumerable"); + assert_true(desc.configurable, alias + " should be configurable"); + assert_false('get' in desc, alias + " should not have a getter"); + assert_false('set' in desc, alias + " should not have a setter"); + } + } else { + for (alias of aliases) { + assert_false(alias in self, alias + " should not exist"); + } + } + + }.bind(this), this.name + " interface: legacy window alias"); + } + + if (this.has_extended_attribute("LegacyFactoryFunction")) { + var constructors = this.extAttrs + .filter(function(attr) { return attr.name == "LegacyFactoryFunction"; }); + if (constructors.length !== 1) { + throw new IdlHarnessError("Internal error: missing support for multiple LegacyFactoryFunction extended attributes"); + } + var constructor = constructors[0]; + var min_length = minOverloadLength([constructor]); + + subsetTestByKey(this.name, test, function() + { + // This function tests WebIDL as of 2019-01-14. + + // "for every [LegacyFactoryFunction] extended attribute on an exposed + // interface, a corresponding property must exist on the ECMAScript + // global object. The name of the property is the + // [LegacyFactoryFunction]'s identifier, and its value is an object + // called a named constructor, ... . The property has the attributes + // { [[Writable]]: true, [[Enumerable]]: false, + // [[Configurable]]: true }." + var name = constructor.rhs.value; + assert_own_property(self, name); + var desc = Object.getOwnPropertyDescriptor(self, name); + assert_equals(desc.value, self[name], "wrong value in " + name + " property descriptor"); + assert_true(desc.writable, name + " should be writable"); + assert_false(desc.enumerable, name + " should not be enumerable"); + assert_true(desc.configurable, name + " should be configurable"); + assert_false("get" in desc, name + " should not have a getter"); + assert_false("set" in desc, name + " should not have a setter"); + }.bind(this), this.name + " interface: named constructor"); + + subsetTestByKey(this.name, test, function() + { + // This function tests WebIDL as of 2019-01-14. + + // "2. Let F be ! CreateBuiltinFunction(realm, steps, + // realm.[[Intrinsics]].[[%FunctionPrototype%]])." + var name = constructor.rhs.value; + var value = self[name]; + assert_equals(typeof value, "function", "type of value in " + name + " property descriptor"); + assert_not_equals(value, this.get_interface_object(), "wrong value in " + name + " property descriptor"); + assert_equals(Object.getPrototypeOf(value), Function.prototype, "wrong value for " + name + "'s prototype"); + }.bind(this), this.name + " interface: named constructor object"); + + subsetTestByKey(this.name, test, function() + { + // This function tests WebIDL as of 2019-01-14. + + // "7. Let proto be the interface prototype object of interface I + // in realm. + // "8. Perform ! DefinePropertyOrThrow(F, "prototype", + // PropertyDescriptor{ + // [[Value]]: proto, [[Writable]]: false, + // [[Enumerable]]: false, [[Configurable]]: false + // })." + var name = constructor.rhs.value; + var expected = this.get_interface_object().prototype; + var desc = Object.getOwnPropertyDescriptor(self[name], "prototype"); + assert_equals(desc.value, expected, "wrong value for " + name + ".prototype"); + assert_false(desc.writable, "prototype should not be writable"); + assert_false(desc.enumerable, "prototype should not be enumerable"); + assert_false(desc.configurable, "prototype should not be configurable"); + assert_false("get" in desc, "prototype should not have a getter"); + assert_false("set" in desc, "prototype should not have a setter"); + }.bind(this), this.name + " interface: named constructor prototype property"); + + subsetTestByKey(this.name, test, function() + { + // This function tests WebIDL as of 2019-01-14. + + // "3. Perform ! SetFunctionName(F, id)." + var name = constructor.rhs.value; + var desc = Object.getOwnPropertyDescriptor(self[name], "name"); + assert_equals(desc.value, name, "wrong value for " + name + ".name"); + assert_false(desc.writable, "name should not be writable"); + assert_false(desc.enumerable, "name should not be enumerable"); + assert_true(desc.configurable, "name should be configurable"); + assert_false("get" in desc, "name should not have a getter"); + assert_false("set" in desc, "name should not have a setter"); + }.bind(this), this.name + " interface: named constructor name"); + + subsetTestByKey(this.name, test, function() + { + // This function tests WebIDL as of 2019-01-14. + + // "4. Initialize S to the effective overload set for constructors + // with identifier id on interface I and with argument count 0. + // "5. Let length be the length of the shortest argument list of + // the entries in S. + // "6. Perform ! SetFunctionLength(F, length)." + var name = constructor.rhs.value; + var desc = Object.getOwnPropertyDescriptor(self[name], "length"); + assert_equals(desc.value, min_length, "wrong value for " + name + ".length"); + assert_false(desc.writable, "length should not be writable"); + assert_false(desc.enumerable, "length should not be enumerable"); + assert_true(desc.configurable, "length should be configurable"); + assert_false("get" in desc, "length should not have a getter"); + assert_false("set" in desc, "length should not have a setter"); + }.bind(this), this.name + " interface: named constructor length"); + + subsetTestByKey(this.name, test, function() + { + // This function tests WebIDL as of 2019-01-14. + + // "1. Let steps be the following steps: + // " 1. If NewTarget is undefined, then throw a TypeError." + var name = constructor.rhs.value; + var args = constructor.arguments.map(function(arg) { + return create_suitable_object(arg.idlType); + }); + assert_throws_js(globalOf(self[name]).TypeError, function() { + self[name](...args); + }.bind(this)); + }.bind(this), this.name + " interface: named constructor without 'new'"); + } + + subsetTestByKey(this.name, test, function() + { + // This function tests WebIDL as of 2015-01-21. + // https://webidl.spec.whatwg.org/#interface-object + + if (!this.should_have_interface_object()) { + return; + } + + this.assert_interface_object_exists(); + + if (this.is_callback()) { + assert_false("prototype" in this.get_interface_object(), + this.name + ' should not have a "prototype" property'); + return; + } + + // "An interface object for a non-callback interface must have a + // property named “prototype” with attributes { [[Writable]]: false, + // [[Enumerable]]: false, [[Configurable]]: false } whose value is an + // object called the interface prototype object. This object has + // properties that correspond to the regular attributes and regular + // operations defined on the interface, and is described in more detail + // in section 4.5.4 below." + assert_own_property(this.get_interface_object(), "prototype", + 'interface "' + this.name + '" does not have own property "prototype"'); + var desc = Object.getOwnPropertyDescriptor(this.get_interface_object(), "prototype"); + assert_false("get" in desc, this.name + ".prototype should not have a getter"); + assert_false("set" in desc, this.name + ".prototype should not have a setter"); + assert_false(desc.writable, this.name + ".prototype should not be writable"); + assert_false(desc.enumerable, this.name + ".prototype should not be enumerable"); + assert_false(desc.configurable, this.name + ".prototype should not be configurable"); + + // Next, test that the [[Prototype]] of the interface prototype object + // is correct. (This is made somewhat difficult by the existence of + // [LegacyNoInterfaceObject].) + // TODO: Aryeh thinks there's at least other place in this file where + // we try to figure out if an interface prototype object is + // correct. Consolidate that code. + + // "The interface prototype object for a given interface A must have an + // internal [[Prototype]] property whose value is returned from the + // following steps: + // "If A is declared with the [Global] extended + // attribute, and A supports named properties, then return the named + // properties object for A, as defined in §3.6.4 Named properties + // object. + // "Otherwise, if A is declared to inherit from another interface, then + // return the interface prototype object for the inherited interface. + // "Otherwise, return %ObjectPrototype%. + // + // "In the ECMAScript binding, the DOMException type has some additional + // requirements: + // + // "Unlike normal interface types, the interface prototype object + // for DOMException must have as its [[Prototype]] the intrinsic + // object %ErrorPrototype%." + // + if (this.name === "Window") { + assert_class_string(Object.getPrototypeOf(this.get_interface_object().prototype), + 'WindowProperties', + 'Class name for prototype of Window' + + '.prototype is not "WindowProperties"'); + } else { + var inherit_interface, inherit_interface_interface_object; + if (this.base) { + inherit_interface = this.base; + var parent = this.array.members[inherit_interface]; + if (!parent.has_extended_attribute("LegacyNoInterfaceObject")) { + parent.assert_interface_object_exists(); + inherit_interface_interface_object = parent.get_interface_object(); + } + } else if (this.name === "DOMException") { + inherit_interface = 'Error'; + inherit_interface_interface_object = self.Error; + } else { + inherit_interface = 'Object'; + inherit_interface_interface_object = self.Object; + } + if (inherit_interface_interface_object) { + assert_not_equals(inherit_interface_interface_object, undefined, + 'should inherit from ' + inherit_interface + ', but there is no such property'); + assert_own_property(inherit_interface_interface_object, 'prototype', + 'should inherit from ' + inherit_interface + ', but that object has no "prototype" property'); + assert_equals(Object.getPrototypeOf(this.get_interface_object().prototype), + inherit_interface_interface_object.prototype, + 'prototype of ' + this.name + '.prototype is not ' + inherit_interface + '.prototype'); + } else { + // We can't test that we get the correct object, because this is the + // only way to get our hands on it. We only test that its class + // string, at least, is correct. + assert_class_string(Object.getPrototypeOf(this.get_interface_object().prototype), + inherit_interface + 'Prototype', + 'Class name for prototype of ' + this.name + + '.prototype is not "' + inherit_interface + 'Prototype"'); + } + } + + // "The class string of an interface prototype object is the + // concatenation of the interface’s qualified identifier and the string + // “Prototype”." + + // Skip these tests for now due to a specification issue about + // prototype name. + // https://www.w3.org/Bugs/Public/show_bug.cgi?id=28244 + + // assert_class_string(this.get_interface_object().prototype, this.get_qualified_name() + "Prototype", + // "class string of " + this.name + ".prototype"); + + // String() should end up calling {}.toString if nothing defines a + // stringifier. + if (!this.has_stringifier()) { + // assert_equals(String(this.get_interface_object().prototype), "[object " + this.get_qualified_name() + "Prototype]", + // "String(" + this.name + ".prototype)"); + } + }.bind(this), this.name + " interface: existence and properties of interface prototype object"); + + // "If the interface is declared with the [Global] + // extended attribute, or the interface is in the set of inherited + // interfaces for any other interface that is declared with one of these + // attributes, then the interface prototype object must be an immutable + // prototype exotic object." + // https://webidl.spec.whatwg.org/#interface-prototype-object + if (this.is_global()) { + this.test_immutable_prototype("interface prototype object", this.get_interface_object().prototype); + } + + subsetTestByKey(this.name, test, function() + { + if (!this.should_have_interface_object()) { + return; + } + + this.assert_interface_object_exists(); + + if (this.is_callback()) { + assert_false("prototype" in this.get_interface_object(), + this.name + ' should not have a "prototype" property'); + return; + } + + assert_own_property(this.get_interface_object(), "prototype", + 'interface "' + this.name + '" does not have own property "prototype"'); + + // "If the [LegacyNoInterfaceObject] extended attribute was not specified + // on the interface, then the interface prototype object must also have a + // property named “constructor” with attributes { [[Writable]]: true, + // [[Enumerable]]: false, [[Configurable]]: true } whose value is a + // reference to the interface object for the interface." + assert_own_property(this.get_interface_object().prototype, "constructor", + this.name + '.prototype does not have own property "constructor"'); + var desc = Object.getOwnPropertyDescriptor(this.get_interface_object().prototype, "constructor"); + assert_false("get" in desc, this.name + ".prototype.constructor should not have a getter"); + assert_false("set" in desc, this.name + ".prototype.constructor should not have a setter"); + assert_true(desc.writable, this.name + ".prototype.constructor should be writable"); + assert_false(desc.enumerable, this.name + ".prototype.constructor should not be enumerable"); + assert_true(desc.configurable, this.name + ".prototype.constructor should be configurable"); + assert_equals(this.get_interface_object().prototype.constructor, this.get_interface_object(), + this.name + '.prototype.constructor is not the same object as ' + this.name); + }.bind(this), this.name + ' interface: existence and properties of interface prototype object\'s "constructor" property'); + + + subsetTestByKey(this.name, test, function() + { + if (!this.should_have_interface_object()) { + return; + } + + this.assert_interface_object_exists(); + + if (this.is_callback()) { + assert_false("prototype" in this.get_interface_object(), + this.name + ' should not have a "prototype" property'); + return; + } + + assert_own_property(this.get_interface_object(), "prototype", + 'interface "' + this.name + '" does not have own property "prototype"'); + + // If the interface has any member declared with the [Unscopable] extended + // attribute, then there must be a property on the interface prototype object + // whose name is the @@unscopables symbol, which has the attributes + // { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }, + // and whose value is an object created as follows... + var unscopables = this.get_unscopables().map(m => m.name); + var proto = this.get_interface_object().prototype; + if (unscopables.length != 0) { + assert_own_property( + proto, Symbol.unscopables, + this.name + '.prototype should have an @@unscopables property'); + var desc = Object.getOwnPropertyDescriptor(proto, Symbol.unscopables); + assert_false("get" in desc, + this.name + ".prototype[Symbol.unscopables] should not have a getter"); + assert_false("set" in desc, this.name + ".prototype[Symbol.unscopables] should not have a setter"); + assert_false(desc.writable, this.name + ".prototype[Symbol.unscopables] should not be writable"); + assert_false(desc.enumerable, this.name + ".prototype[Symbol.unscopables] should not be enumerable"); + assert_true(desc.configurable, this.name + ".prototype[Symbol.unscopables] should be configurable"); + assert_equals(desc.value, proto[Symbol.unscopables], + this.name + '.prototype[Symbol.unscopables] should be in the descriptor'); + assert_equals(typeof desc.value, "object", + this.name + '.prototype[Symbol.unscopables] should be an object'); + assert_equals(Object.getPrototypeOf(desc.value), null, + this.name + '.prototype[Symbol.unscopables] should have a null prototype'); + assert_equals(Object.getOwnPropertySymbols(desc.value).length, + 0, + this.name + '.prototype[Symbol.unscopables] should have the right number of symbol-named properties'); + + // Check that we do not have _extra_ unscopables. Checking that we + // have all the ones we should will happen in the per-member tests. + var observed = Object.getOwnPropertyNames(desc.value); + for (var prop of observed) { + assert_not_equals(unscopables.indexOf(prop), + -1, + this.name + '.prototype[Symbol.unscopables] has unexpected property "' + prop + '"'); + } + } else { + assert_equals(Object.getOwnPropertyDescriptor(this.get_interface_object().prototype, Symbol.unscopables), + undefined, + this.name + '.prototype should not have @@unscopables'); + } + }.bind(this), this.name + ' interface: existence and properties of interface prototype object\'s @@unscopables property'); +}; + +IdlInterface.prototype.test_immutable_prototype = function(type, obj) +{ + if (typeof Object.setPrototypeOf !== "function") { + return; + } + + subsetTestByKey(this.name, test, function(t) { + var originalValue = Object.getPrototypeOf(obj); + var newValue = Object.create(null); + + t.add_cleanup(function() { + try { + Object.setPrototypeOf(obj, originalValue); + } catch (err) {} + }); + + assert_throws_js(TypeError, function() { + Object.setPrototypeOf(obj, newValue); + }); + + assert_equals( + Object.getPrototypeOf(obj), + originalValue, + "original value not modified" + ); + }.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " + + "of " + type + " - setting to a new value via Object.setPrototypeOf " + + "should throw a TypeError"); + + subsetTestByKey(this.name, test, function(t) { + var originalValue = Object.getPrototypeOf(obj); + var newValue = Object.create(null); + + t.add_cleanup(function() { + let setter = Object.getOwnPropertyDescriptor( + Object.prototype, '__proto__' + ).set; + + try { + setter.call(obj, originalValue); + } catch (err) {} + }); + + // We need to find the actual setter for the '__proto__' property, so we + // can determine the right global for it. Walk up the prototype chain + // looking for that property until we find it. + let setter; + { + let cur = obj; + while (cur) { + const desc = Object.getOwnPropertyDescriptor(cur, "__proto__"); + if (desc) { + setter = desc.set; + break; + } + cur = Object.getPrototypeOf(cur); + } + } + assert_throws_js(globalOf(setter).TypeError, function() { + obj.__proto__ = newValue; + }); + + assert_equals( + Object.getPrototypeOf(obj), + originalValue, + "original value not modified" + ); + }.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " + + "of " + type + " - setting to a new value via __proto__ " + + "should throw a TypeError"); + + subsetTestByKey(this.name, test, function(t) { + var originalValue = Object.getPrototypeOf(obj); + var newValue = Object.create(null); + + t.add_cleanup(function() { + try { + Reflect.setPrototypeOf(obj, originalValue); + } catch (err) {} + }); + + assert_false(Reflect.setPrototypeOf(obj, newValue)); + + assert_equals( + Object.getPrototypeOf(obj), + originalValue, + "original value not modified" + ); + }.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " + + "of " + type + " - setting to a new value via Reflect.setPrototypeOf " + + "should return false"); + + subsetTestByKey(this.name, test, function() { + var originalValue = Object.getPrototypeOf(obj); + + Object.setPrototypeOf(obj, originalValue); + }.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " + + "of " + type + " - setting to its original value via Object.setPrototypeOf " + + "should not throw"); + + subsetTestByKey(this.name, test, function() { + var originalValue = Object.getPrototypeOf(obj); + + obj.__proto__ = originalValue; + }.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " + + "of " + type + " - setting to its original value via __proto__ " + + "should not throw"); + + subsetTestByKey(this.name, test, function() { + var originalValue = Object.getPrototypeOf(obj); + + assert_true(Reflect.setPrototypeOf(obj, originalValue)); + }.bind(this), this.name + " interface: internal [[SetPrototypeOf]] method " + + "of " + type + " - setting to its original value via Reflect.setPrototypeOf " + + "should return true"); +}; + +IdlInterface.prototype.test_member_const = function(member) +{ + if (!this.has_constants()) { + throw new IdlHarnessError("Internal error: test_member_const called without any constants"); + } + + subsetTestByKey(this.name, test, function() + { + this.assert_interface_object_exists(); + + // "For each constant defined on an interface A, there must be + // a corresponding property on the interface object, if it + // exists." + assert_own_property(this.get_interface_object(), member.name); + // "The value of the property is that which is obtained by + // converting the constant’s IDL value to an ECMAScript + // value." + assert_equals(this.get_interface_object()[member.name], constValue(member.value), + "property has wrong value"); + // "The property has attributes { [[Writable]]: false, + // [[Enumerable]]: true, [[Configurable]]: false }." + var desc = Object.getOwnPropertyDescriptor(this.get_interface_object(), member.name); + assert_false("get" in desc, "property should not have a getter"); + assert_false("set" in desc, "property should not have a setter"); + assert_false(desc.writable, "property should not be writable"); + assert_true(desc.enumerable, "property should be enumerable"); + assert_false(desc.configurable, "property should not be configurable"); + }.bind(this), this.name + " interface: constant " + member.name + " on interface object"); + + // "In addition, a property with the same characteristics must + // exist on the interface prototype object." + subsetTestByKey(this.name, test, function() + { + this.assert_interface_object_exists(); + + if (this.is_callback()) { + assert_false("prototype" in this.get_interface_object(), + this.name + ' should not have a "prototype" property'); + return; + } + + assert_own_property(this.get_interface_object(), "prototype", + 'interface "' + this.name + '" does not have own property "prototype"'); + + assert_own_property(this.get_interface_object().prototype, member.name); + assert_equals(this.get_interface_object().prototype[member.name], constValue(member.value), + "property has wrong value"); + var desc = Object.getOwnPropertyDescriptor(this.get_interface_object(), member.name); + assert_false("get" in desc, "property should not have a getter"); + assert_false("set" in desc, "property should not have a setter"); + assert_false(desc.writable, "property should not be writable"); + assert_true(desc.enumerable, "property should be enumerable"); + assert_false(desc.configurable, "property should not be configurable"); + }.bind(this), this.name + " interface: constant " + member.name + " on interface prototype object"); +}; + + +IdlInterface.prototype.test_member_attribute = function(member) + { + if (!shouldRunSubTest(this.name)) { + return; + } + var a_test = subsetTestByKey(this.name, async_test, this.name + " interface: attribute " + member.name); + a_test.step(function() + { + if (!this.should_have_interface_object()) { + a_test.done(); + return; + } + + this.assert_interface_object_exists(); + assert_own_property(this.get_interface_object(), "prototype", + 'interface "' + this.name + '" does not have own property "prototype"'); + + if (member.special === "static") { + assert_own_property(this.get_interface_object(), member.name, + "The interface object must have a property " + + format_value(member.name)); + a_test.done(); + return; + } + + this.do_member_unscopable_asserts(member); + + if (this.is_global()) { + assert_own_property(self, member.name, + "The global object must have a property " + + format_value(member.name)); + assert_false(member.name in this.get_interface_object().prototype, + "The prototype object should not have a property " + + format_value(member.name)); + + var getter = Object.getOwnPropertyDescriptor(self, member.name).get; + assert_equals(typeof(getter), "function", + format_value(member.name) + " must have a getter"); + + // Try/catch around the get here, since it can legitimately throw. + // If it does, we obviously can't check for equality with direct + // invocation of the getter. + var gotValue; + var propVal; + try { + propVal = self[member.name]; + gotValue = true; + } catch (e) { + gotValue = false; + } + if (gotValue) { + assert_equals(propVal, getter.call(undefined), + "Gets on a global should not require an explicit this"); + } + + // do_interface_attribute_asserts must be the last thing we do, + // since it will call done() on a_test. + this.do_interface_attribute_asserts(self, member, a_test); + } else { + assert_true(member.name in this.get_interface_object().prototype, + "The prototype object must have a property " + + format_value(member.name)); + + if (!member.has_extended_attribute("LegacyLenientThis")) { + if (member.idlType.generic !== "Promise") { + // this.get_interface_object() returns a thing in our global + assert_throws_js(TypeError, function() { + this.get_interface_object().prototype[member.name]; + }.bind(this), "getting property on prototype object must throw TypeError"); + // do_interface_attribute_asserts must be the last thing we + // do, since it will call done() on a_test. + this.do_interface_attribute_asserts(this.get_interface_object().prototype, member, a_test); + } else { + promise_rejects_js(a_test, TypeError, + this.get_interface_object().prototype[member.name]) + .then(a_test.step_func(function() { + // do_interface_attribute_asserts must be the last + // thing we do, since it will call done() on a_test. + this.do_interface_attribute_asserts(this.get_interface_object().prototype, + member, a_test); + }.bind(this))); + } + } else { + assert_equals(this.get_interface_object().prototype[member.name], undefined, + "getting property on prototype object must return undefined"); + // do_interface_attribute_asserts must be the last thing we do, + // since it will call done() on a_test. + this.do_interface_attribute_asserts(this.get_interface_object().prototype, member, a_test); + } + } + }.bind(this)); +}; + +IdlInterface.prototype.test_member_operation = function(member) +{ + if (!shouldRunSubTest(this.name)) { + return; + } + var a_test = subsetTestByKey(this.name, async_test, this.name + " interface: operation " + member); + a_test.step(function() + { + // This function tests WebIDL as of 2015-12-29. + // https://webidl.spec.whatwg.org/#es-operations + + if (!this.should_have_interface_object()) { + a_test.done(); + return; + } + + this.assert_interface_object_exists(); + + if (this.is_callback()) { + assert_false("prototype" in this.get_interface_object(), + this.name + ' should not have a "prototype" property'); + a_test.done(); + return; + } + + assert_own_property(this.get_interface_object(), "prototype", + 'interface "' + this.name + '" does not have own property "prototype"'); + + // "For each unique identifier of an exposed operation defined on the + // interface, there must exist a corresponding property, unless the + // effective overload set for that identifier and operation and with an + // argument count of 0 has no entries." + + // TODO: Consider [Exposed]. + + // "The location of the property is determined as follows:" + var memberHolderObject; + // "* If the operation is static, then the property exists on the + // interface object." + if (member.special === "static") { + assert_own_property(this.get_interface_object(), member.name, + "interface object missing static operation"); + memberHolderObject = this.get_interface_object(); + // "* Otherwise, [...] if the interface was declared with the [Global] + // extended attribute, then the property exists + // on every object that implements the interface." + } else if (this.is_global()) { + assert_own_property(self, member.name, + "global object missing non-static operation"); + memberHolderObject = self; + // "* Otherwise, the property exists solely on the interface’s + // interface prototype object." + } else { + assert_own_property(this.get_interface_object().prototype, member.name, + "interface prototype object missing non-static operation"); + memberHolderObject = this.get_interface_object().prototype; + } + this.do_member_unscopable_asserts(member); + this.do_member_operation_asserts(memberHolderObject, member, a_test); + }.bind(this)); +}; + +IdlInterface.prototype.do_member_unscopable_asserts = function(member) +{ + // Check that if the member is unscopable then it's in the + // @@unscopables object properly. + if (!member.isUnscopable) { + return; + } + + var unscopables = this.get_interface_object().prototype[Symbol.unscopables]; + var prop = member.name; + var propDesc = Object.getOwnPropertyDescriptor(unscopables, prop); + assert_equals(typeof propDesc, "object", + this.name + '.prototype[Symbol.unscopables].' + prop + ' must exist') + assert_false("get" in propDesc, + this.name + '.prototype[Symbol.unscopables].' + prop + ' must have no getter'); + assert_false("set" in propDesc, + this.name + '.prototype[Symbol.unscopables].' + prop + ' must have no setter'); + assert_true(propDesc.writable, + this.name + '.prototype[Symbol.unscopables].' + prop + ' must be writable'); + assert_true(propDesc.enumerable, + this.name + '.prototype[Symbol.unscopables].' + prop + ' must be enumerable'); + assert_true(propDesc.configurable, + this.name + '.prototype[Symbol.unscopables].' + prop + ' must be configurable'); + assert_equals(propDesc.value, true, + this.name + '.prototype[Symbol.unscopables].' + prop + ' must have the value `true`'); +}; + +IdlInterface.prototype.do_member_operation_asserts = function(memberHolderObject, member, a_test) +{ + var done = a_test.done.bind(a_test); + var operationUnforgeable = member.isUnforgeable; + var desc = Object.getOwnPropertyDescriptor(memberHolderObject, member.name); + // "The property has attributes { [[Writable]]: B, + // [[Enumerable]]: true, [[Configurable]]: B }, where B is false if the + // operation is unforgeable on the interface, and true otherwise". + assert_false("get" in desc, "property should not have a getter"); + assert_false("set" in desc, "property should not have a setter"); + assert_equals(desc.writable, !operationUnforgeable, + "property should be writable if and only if not unforgeable"); + assert_true(desc.enumerable, "property should be enumerable"); + assert_equals(desc.configurable, !operationUnforgeable, + "property should be configurable if and only if not unforgeable"); + // "The value of the property is a Function object whose + // behavior is as follows . . ." + assert_equals(typeof memberHolderObject[member.name], "function", + "property must be a function"); + + const operationOverloads = this.members.filter(function(m) { + return m.type == "operation" && m.name == member.name && + (m.special === "static") === (member.special === "static"); + }); + assert_equals( + memberHolderObject[member.name].length, + minOverloadLength(operationOverloads), + "property has wrong .length"); + assert_equals( + memberHolderObject[member.name].name, + member.name, + "property has wrong .name"); + + // Make some suitable arguments + var args = member.arguments.map(function(arg) { + return create_suitable_object(arg.idlType); + }); + + // "Let O be a value determined as follows: + // ". . . + // "Otherwise, throw a TypeError." + // This should be hit if the operation is not static, there is + // no [ImplicitThis] attribute, and the this value is null. + // + // TODO: We currently ignore the [ImplicitThis] case. Except we manually + // check for globals, since otherwise we'll invoke window.close(). And we + // have to skip this test for anything that on the proto chain of "self", + // since that does in fact have implicit-this behavior. + if (member.special !== "static") { + var cb; + if (!this.is_global() && + memberHolderObject[member.name] != self[member.name]) + { + cb = awaitNCallbacks(2, done); + throwOrReject(a_test, member, memberHolderObject[member.name], null, args, + "calling operation with this = null didn't throw TypeError", cb); + } else { + cb = awaitNCallbacks(1, done); + } + + // ". . . If O is not null and is also not a platform object + // that implements interface I, throw a TypeError." + // + // TODO: Test a platform object that implements some other + // interface. (Have to be sure to get inheritance right.) + throwOrReject(a_test, member, memberHolderObject[member.name], {}, args, + "calling operation with this = {} didn't throw TypeError", cb); + } else { + done(); + } +} + +IdlInterface.prototype.test_to_json_operation = function(desc, memberHolderObject, member) { + var instanceName = memberHolderObject && memberHolderObject.constructor.name + || member.name + " object"; + if (member.has_extended_attribute("Default")) { + subsetTestByKey(this.name, test, function() { + var map = this.default_to_json_operation(); + var json = memberHolderObject.toJSON(); + map.forEach(function(type, k) { + assert_true(k in json, "property " + JSON.stringify(k) + " should be present in the output of " + this.name + ".prototype.toJSON()"); + var descriptor = Object.getOwnPropertyDescriptor(json, k); + assert_true(descriptor.writable, "property " + k + " should be writable"); + assert_true(descriptor.configurable, "property " + k + " should be configurable"); + assert_true(descriptor.enumerable, "property " + k + " should be enumerable"); + this.array.assert_type_is(json[k], type); + delete json[k]; + }, this); + }.bind(this), this.name + " interface: default toJSON operation on " + desc); + } else { + subsetTestByKey(this.name, test, function() { + assert_true(this.array.is_json_type(member.idlType), JSON.stringify(member.idlType) + " is not an appropriate return value for the toJSON operation of " + instanceName); + this.array.assert_type_is(memberHolderObject.toJSON(), member.idlType); + }.bind(this), this.name + " interface: toJSON operation on " + desc); + } +}; + +IdlInterface.prototype.test_member_maplike = function(member) { + subsetTestByKey(this.name, test, () => { + const proto = this.get_interface_object().prototype; + + const methods = [ + ["entries", 0], + ["keys", 0], + ["values", 0], + ["forEach", 1], + ["get", 1], + ["has", 1] + ]; + if (!member.readonly) { + methods.push( + ["set", 2], + ["delete", 1], + ["clear", 0] + ); + } + + for (const [name, length] of methods) { + const desc = Object.getOwnPropertyDescriptor(proto, name); + assert_equals(typeof desc.value, "function", `${name} should be a function`); + assert_equals(desc.enumerable, true, `${name} enumerable`); + assert_equals(desc.configurable, true, `${name} configurable`); + assert_equals(desc.writable, true, `${name} writable`); + assert_equals(desc.value.length, length, `${name} function object length should be ${length}`); + assert_equals(desc.value.name, name, `${name} function object should have the right name`); + } + + const iteratorDesc = Object.getOwnPropertyDescriptor(proto, Symbol.iterator); + assert_equals(iteratorDesc.value, proto.entries, `@@iterator should equal entries`); + assert_equals(iteratorDesc.enumerable, false, `@@iterator enumerable`); + assert_equals(iteratorDesc.configurable, true, `@@iterator configurable`); + assert_equals(iteratorDesc.writable, true, `@@iterator writable`); + + const sizeDesc = Object.getOwnPropertyDescriptor(proto, "size"); + assert_equals(typeof sizeDesc.get, "function", `size getter should be a function`); + assert_equals(sizeDesc.set, undefined, `size should not have a setter`); + assert_equals(sizeDesc.enumerable, true, `size enumerable`); + assert_equals(sizeDesc.configurable, true, `size configurable`); + assert_equals(sizeDesc.get.length, 0, `size getter length`); + assert_equals(sizeDesc.get.name, "get size", `size getter name`); + }, `${this.name} interface: maplike<${member.idlType.map(t => t.idlType).join(", ")}>`); +}; + +IdlInterface.prototype.test_member_setlike = function(member) { + subsetTestByKey(this.name, test, () => { + const proto = this.get_interface_object().prototype; + + const methods = [ + ["entries", 0], + ["keys", 0], + ["values", 0], + ["forEach", 1], + ["has", 1] + ]; + if (!member.readonly) { + methods.push( + ["add", 1], + ["delete", 1], + ["clear", 0] + ); + } + + for (const [name, length] of methods) { + const desc = Object.getOwnPropertyDescriptor(proto, name); + assert_equals(typeof desc.value, "function", `${name} should be a function`); + assert_equals(desc.enumerable, true, `${name} enumerable`); + assert_equals(desc.configurable, true, `${name} configurable`); + assert_equals(desc.writable, true, `${name} writable`); + assert_equals(desc.value.length, length, `${name} function object length should be ${length}`); + assert_equals(desc.value.name, name, `${name} function object should have the right name`); + } + + const iteratorDesc = Object.getOwnPropertyDescriptor(proto, Symbol.iterator); + assert_equals(iteratorDesc.value, proto.values, `@@iterator should equal values`); + assert_equals(iteratorDesc.enumerable, false, `@@iterator enumerable`); + assert_equals(iteratorDesc.configurable, true, `@@iterator configurable`); + assert_equals(iteratorDesc.writable, true, `@@iterator writable`); + + const sizeDesc = Object.getOwnPropertyDescriptor(proto, "size"); + assert_equals(typeof sizeDesc.get, "function", `size getter should be a function`); + assert_equals(sizeDesc.set, undefined, `size should not have a setter`); + assert_equals(sizeDesc.enumerable, true, `size enumerable`); + assert_equals(sizeDesc.configurable, true, `size configurable`); + assert_equals(sizeDesc.get.length, 0, `size getter length`); + assert_equals(sizeDesc.get.name, "get size", `size getter name`); + }, `${this.name} interface: setlike<${member.idlType.map(t => t.idlType).join(", ")}>`); +}; + +IdlInterface.prototype.test_member_iterable = function(member) { + subsetTestByKey(this.name, test, () => { + const isPairIterator = member.idlType.length === 2; + const proto = this.get_interface_object().prototype; + + const methods = [ + ["entries", 0], + ["keys", 0], + ["values", 0], + ["forEach", 1] + ]; + + for (const [name, length] of methods) { + const desc = Object.getOwnPropertyDescriptor(proto, name); + assert_equals(typeof desc.value, "function", `${name} should be a function`); + assert_equals(desc.enumerable, true, `${name} enumerable`); + assert_equals(desc.configurable, true, `${name} configurable`); + assert_equals(desc.writable, true, `${name} writable`); + assert_equals(desc.value.length, length, `${name} function object length should be ${length}`); + assert_equals(desc.value.name, name, `${name} function object should have the right name`); + + if (!isPairIterator) { + assert_equals(desc.value, Array.prototype[name], `${name} equality with Array.prototype version`); + } + } + + const iteratorDesc = Object.getOwnPropertyDescriptor(proto, Symbol.iterator); + assert_equals(iteratorDesc.enumerable, false, `@@iterator enumerable`); + assert_equals(iteratorDesc.configurable, true, `@@iterator configurable`); + assert_equals(iteratorDesc.writable, true, `@@iterator writable`); + + if (isPairIterator) { + assert_equals(iteratorDesc.value, proto.entries, `@@iterator equality with entries`); + } else { + assert_equals(iteratorDesc.value, Array.prototype[Symbol.iterator], `@@iterator equality with Array.prototype version`); + } + }, `${this.name} interface: iterable<${member.idlType.map(t => t.idlType).join(", ")}>`); +}; + +IdlInterface.prototype.test_member_async_iterable = function(member) { + subsetTestByKey(this.name, test, () => { + const isPairIterator = member.idlType.length === 2; + const proto = this.get_interface_object().prototype; + + // Note that although the spec allows arguments, which will be passed to the @@asyncIterator + // method (which is either values or entries), those arguments must always be optional. So + // length of 0 is still correct for values and entries. + const methods = [ + ["values", 0], + ]; + + if (isPairIterator) { + methods.push( + ["entries", 0], + ["keys", 0] + ); + } + + for (const [name, length] of methods) { + const desc = Object.getOwnPropertyDescriptor(proto, name); + assert_equals(typeof desc.value, "function", `${name} should be a function`); + assert_equals(desc.enumerable, true, `${name} enumerable`); + assert_equals(desc.configurable, true, `${name} configurable`); + assert_equals(desc.writable, true, `${name} writable`); + assert_equals(desc.value.length, length, `${name} function object length should be ${length}`); + assert_equals(desc.value.name, name, `${name} function object should have the right name`); + } + + const iteratorDesc = Object.getOwnPropertyDescriptor(proto, Symbol.asyncIterator); + assert_equals(iteratorDesc.enumerable, false, `@@iterator enumerable`); + assert_equals(iteratorDesc.configurable, true, `@@iterator configurable`); + assert_equals(iteratorDesc.writable, true, `@@iterator writable`); + + if (isPairIterator) { + assert_equals(iteratorDesc.value, proto.entries, `@@iterator equality with entries`); + } else { + assert_equals(iteratorDesc.value, proto.values, `@@iterator equality with values`); + } + }, `${this.name} interface: async iterable<${member.idlType.map(t => t.idlType).join(", ")}>`); +}; + +IdlInterface.prototype.test_member_stringifier = function(member) +{ + subsetTestByKey(this.name, test, function() + { + if (!this.should_have_interface_object()) { + return; + } + + this.assert_interface_object_exists(); + + if (this.is_callback()) { + assert_false("prototype" in this.get_interface_object(), + this.name + ' should not have a "prototype" property'); + return; + } + + assert_own_property(this.get_interface_object(), "prototype", + 'interface "' + this.name + '" does not have own property "prototype"'); + + // ". . . the property exists on the interface prototype object." + var interfacePrototypeObject = this.get_interface_object().prototype; + assert_own_property(interfacePrototypeObject, "toString", + "interface prototype object missing non-static operation"); + + var stringifierUnforgeable = member.isUnforgeable; + var desc = Object.getOwnPropertyDescriptor(interfacePrototypeObject, "toString"); + // "The property has attributes { [[Writable]]: B, + // [[Enumerable]]: true, [[Configurable]]: B }, where B is false if the + // stringifier is unforgeable on the interface, and true otherwise." + assert_false("get" in desc, "property should not have a getter"); + assert_false("set" in desc, "property should not have a setter"); + assert_equals(desc.writable, !stringifierUnforgeable, + "property should be writable if and only if not unforgeable"); + assert_true(desc.enumerable, "property should be enumerable"); + assert_equals(desc.configurable, !stringifierUnforgeable, + "property should be configurable if and only if not unforgeable"); + // "The value of the property is a Function object, which behaves as + // follows . . ." + assert_equals(typeof interfacePrototypeObject.toString, "function", + "property must be a function"); + // "The value of the Function object’s “length” property is the Number + // value 0." + assert_equals(interfacePrototypeObject.toString.length, 0, + "property has wrong .length"); + + // "Let O be the result of calling ToObject on the this value." + assert_throws_js(globalOf(interfacePrototypeObject.toString).TypeError, function() { + interfacePrototypeObject.toString.apply(null, []); + }, "calling stringifier with this = null didn't throw TypeError"); + + // "If O is not an object that implements the interface on which the + // stringifier was declared, then throw a TypeError." + // + // TODO: Test a platform object that implements some other + // interface. (Have to be sure to get inheritance right.) + assert_throws_js(globalOf(interfacePrototypeObject.toString).TypeError, function() { + interfacePrototypeObject.toString.apply({}, []); + }, "calling stringifier with this = {} didn't throw TypeError"); + }.bind(this), this.name + " interface: stringifier"); +}; + +IdlInterface.prototype.test_members = function() +{ + var unexposed_members = new Set(); + for (var i = 0; i < this.members.length; i++) + { + var member = this.members[i]; + if (member.untested) { + continue; + } + + if (!exposed_in(exposure_set(member, this.exposureSet))) { + if (!unexposed_members.has(member.name)) { + unexposed_members.add(member.name); + subsetTestByKey(this.name, test, function() { + // It's not exposed, so we shouldn't find it anywhere. + assert_false(member.name in this.get_interface_object(), + "The interface object must not have a property " + + format_value(member.name)); + assert_false(member.name in this.get_interface_object().prototype, + "The prototype object must not have a property " + + format_value(member.name)); + }.bind(this), this.name + " interface: member " + member.name); + } + continue; + } + + switch (member.type) { + case "const": + this.test_member_const(member); + break; + + case "attribute": + // For unforgeable attributes, we do the checks in + // test_interface_of instead. + if (!member.isUnforgeable) + { + this.test_member_attribute(member); + } + if (member.special === "stringifier") { + this.test_member_stringifier(member); + } + break; + + case "operation": + // TODO: Need to correctly handle multiple operations with the same + // identifier. + // For unforgeable operations, we do the checks in + // test_interface_of instead. + if (member.name) { + if (!member.isUnforgeable) + { + this.test_member_operation(member); + } + } else if (member.special === "stringifier") { + this.test_member_stringifier(member); + } + break; + + case "iterable": + if (member.async) { + this.test_member_async_iterable(member); + } else { + this.test_member_iterable(member); + } + break; + case "maplike": + this.test_member_maplike(member); + break; + case "setlike": + this.test_member_setlike(member); + break; + default: + // TODO: check more member types. + break; + } + } +}; + +IdlInterface.prototype.test_object = function(desc) +{ + var obj, exception = null; + try + { + obj = eval(desc); + } + catch(e) + { + exception = e; + } + + var expected_typeof; + if (this.name == "HTMLAllCollection") + { + // Result of [[IsHTMLDDA]] slot + expected_typeof = "undefined"; + } + else + { + expected_typeof = "object"; + } + + if (this.is_callback()) { + assert_equals(exception, null, "Unexpected exception when evaluating object"); + assert_equals(typeof obj, expected_typeof, "wrong typeof object"); + } else { + this.test_primary_interface_of(desc, obj, exception, expected_typeof); + + var current_interface = this; + while (current_interface) + { + if (!(current_interface.name in this.array.members)) + { + throw new IdlHarnessError("Interface " + current_interface.name + " not found (inherited by " + this.name + ")"); + } + if (current_interface.prevent_multiple_testing && current_interface.already_tested) + { + return; + } + current_interface.test_interface_of(desc, obj, exception, expected_typeof); + current_interface = this.array.members[current_interface.base]; + } + } +}; + +IdlInterface.prototype.test_primary_interface_of = function(desc, obj, exception, expected_typeof) +{ + // Only the object itself, not its members, are tested here, so if the + // interface is untested, there is nothing to do. + if (this.untested) + { + return; + } + + // "The internal [[SetPrototypeOf]] method of every platform object that + // implements an interface with the [Global] extended + // attribute must execute the same algorithm as is defined for the + // [[SetPrototypeOf]] internal method of an immutable prototype exotic + // object." + // https://webidl.spec.whatwg.org/#platform-object-setprototypeof + if (this.is_global()) + { + this.test_immutable_prototype("global platform object", obj); + } + + + // We can't easily test that its prototype is correct if there's no + // interface object, or the object is from a different global environment + // (not instanceof Object). TODO: test in this case that its prototype at + // least looks correct, even if we can't test that it's actually correct. + if (this.should_have_interface_object() + && (typeof obj != expected_typeof || obj instanceof Object)) + { + subsetTestByKey(this.name, test, function() + { + assert_equals(exception, null, "Unexpected exception when evaluating object"); + assert_equals(typeof obj, expected_typeof, "wrong typeof object"); + this.assert_interface_object_exists(); + assert_own_property(this.get_interface_object(), "prototype", + 'interface "' + this.name + '" does not have own property "prototype"'); + + // "The value of the internal [[Prototype]] property of the + // platform object is the interface prototype object of the primary + // interface from the platform object’s associated global + // environment." + assert_equals(Object.getPrototypeOf(obj), + this.get_interface_object().prototype, + desc + "'s prototype is not " + this.name + ".prototype"); + }.bind(this), this.name + " must be primary interface of " + desc); + } + + // "The class string of a platform object that implements one or more + // interfaces must be the qualified name of the primary interface of the + // platform object." + subsetTestByKey(this.name, test, function() + { + assert_equals(exception, null, "Unexpected exception when evaluating object"); + assert_equals(typeof obj, expected_typeof, "wrong typeof object"); + assert_class_string(obj, this.get_qualified_name(), "class string of " + desc); + if (!this.has_stringifier()) + { + assert_equals(String(obj), "[object " + this.get_qualified_name() + "]", "String(" + desc + ")"); + } + }.bind(this), "Stringification of " + desc); +}; + +IdlInterface.prototype.test_interface_of = function(desc, obj, exception, expected_typeof) +{ + // TODO: Indexed and named properties, more checks on interface members + this.already_tested = true; + if (!shouldRunSubTest(this.name)) { + return; + } + + var unexposed_properties = new Set(); + for (var i = 0; i < this.members.length; i++) + { + var member = this.members[i]; + if (member.untested) { + continue; + } + if (!exposed_in(exposure_set(member, this.exposureSet))) + { + if (!unexposed_properties.has(member.name)) + { + unexposed_properties.add(member.name); + subsetTestByKey(this.name, test, function() { + assert_equals(exception, null, "Unexpected exception when evaluating object"); + assert_false(member.name in obj); + }.bind(this), this.name + " interface: " + desc + ' must not have property "' + member.name + '"'); + } + continue; + } + if (member.type == "attribute" && member.isUnforgeable) + { + var a_test = subsetTestByKey(this.name, async_test, this.name + " interface: " + desc + ' must have own property "' + member.name + '"'); + a_test.step(function() { + assert_equals(exception, null, "Unexpected exception when evaluating object"); + assert_equals(typeof obj, expected_typeof, "wrong typeof object"); + // Call do_interface_attribute_asserts last, since it will call a_test.done() + this.do_interface_attribute_asserts(obj, member, a_test); + }.bind(this)); + } + else if (member.type == "operation" && + member.name && + member.isUnforgeable) + { + var a_test = subsetTestByKey(this.name, async_test, this.name + " interface: " + desc + ' must have own property "' + member.name + '"'); + a_test.step(function() + { + assert_equals(exception, null, "Unexpected exception when evaluating object"); + assert_equals(typeof obj, expected_typeof, "wrong typeof object"); + assert_own_property(obj, member.name, + "Doesn't have the unforgeable operation property"); + this.do_member_operation_asserts(obj, member, a_test); + }.bind(this)); + } + else if ((member.type == "const" + || member.type == "attribute" + || member.type == "operation") + && member.name) + { + subsetTestByKey(this.name, test, function() + { + assert_equals(exception, null, "Unexpected exception when evaluating object"); + assert_equals(typeof obj, expected_typeof, "wrong typeof object"); + if (member.special !== "static") { + if (!this.is_global()) { + assert_inherits(obj, member.name); + } else { + assert_own_property(obj, member.name); + } + + if (member.type == "const") + { + assert_equals(obj[member.name], constValue(member.value)); + } + if (member.type == "attribute") + { + // Attributes are accessor properties, so they might + // legitimately throw an exception rather than returning + // anything. + var property, thrown = false; + try + { + property = obj[member.name]; + } + catch (e) + { + thrown = true; + } + if (!thrown) + { + if (this.name == "Document" && member.name == "all") + { + // Result of [[IsHTMLDDA]] slot + assert_equals(typeof property, "undefined"); + } + else + { + this.array.assert_type_is(property, member.idlType); + } + } + } + if (member.type == "operation") + { + assert_equals(typeof obj[member.name], "function"); + } + } + }.bind(this), this.name + " interface: " + desc + ' must inherit property "' + member + '" with the proper type'); + } + // TODO: This is wrong if there are multiple operations with the same + // identifier. + // TODO: Test passing arguments of the wrong type. + if (member.type == "operation" && member.name && member.arguments.length) + { + var description = + this.name + " interface: calling " + member + " on " + desc + + " with too few arguments must throw TypeError"; + var a_test = subsetTestByKey(this.name, async_test, description); + a_test.step(function() + { + assert_equals(exception, null, "Unexpected exception when evaluating object"); + assert_equals(typeof obj, expected_typeof, "wrong typeof object"); + var fn; + if (member.special !== "static") { + if (!this.is_global() && !member.isUnforgeable) { + assert_inherits(obj, member.name); + } else { + assert_own_property(obj, member.name); + } + fn = obj[member.name]; + } + else + { + assert_own_property(obj.constructor, member.name, "interface object must have static operation as own property"); + fn = obj.constructor[member.name]; + } + + var minLength = minOverloadLength(this.members.filter(function(m) { + return m.type == "operation" && m.name == member.name; + })); + var args = []; + var cb = awaitNCallbacks(minLength, a_test.done.bind(a_test)); + for (var i = 0; i < minLength; i++) { + throwOrReject(a_test, member, fn, obj, args, "Called with " + i + " arguments", cb); + + args.push(create_suitable_object(member.arguments[i].idlType)); + } + if (minLength === 0) { + cb(); + } + }.bind(this)); + } + + if (member.is_to_json_regular_operation()) { + this.test_to_json_operation(desc, obj, member); + } + } +}; + +IdlInterface.prototype.has_stringifier = function() +{ + if (this.name === "DOMException") { + // toString is inherited from Error, so don't assume we have the + // default stringifer + return true; + } + if (this.members.some(function(member) { return member.special === "stringifier"; })) { + return true; + } + if (this.base && + this.array.members[this.base].has_stringifier()) { + return true; + } + return false; +}; + +IdlInterface.prototype.do_interface_attribute_asserts = function(obj, member, a_test) +{ + // This function tests WebIDL as of 2015-01-27. + // TODO: Consider [Exposed]. + + // This is called by test_member_attribute() with the prototype as obj if + // it is not a global, and the global otherwise, and by test_interface_of() + // with the object as obj. + + var pendingPromises = []; + + // "The name of the property is the identifier of the attribute." + assert_own_property(obj, member.name); + + // "The property has attributes { [[Get]]: G, [[Set]]: S, [[Enumerable]]: + // true, [[Configurable]]: configurable }, where: + // "configurable is false if the attribute was declared with the + // [LegacyUnforgeable] extended attribute and true otherwise; + // "G is the attribute getter, defined below; and + // "S is the attribute setter, also defined below." + var desc = Object.getOwnPropertyDescriptor(obj, member.name); + assert_false("value" in desc, 'property descriptor should not have a "value" field'); + assert_false("writable" in desc, 'property descriptor should not have a "writable" field'); + assert_true(desc.enumerable, "property should be enumerable"); + if (member.isUnforgeable) + { + assert_false(desc.configurable, "[LegacyUnforgeable] property must not be configurable"); + } + else + { + assert_true(desc.configurable, "property must be configurable"); + } + + + // "The attribute getter is a Function object whose behavior when invoked + // is as follows:" + assert_equals(typeof desc.get, "function", "getter must be Function"); + + // "If the attribute is a regular attribute, then:" + if (member.special !== "static") { + // "If O is not a platform object that implements I, then: + // "If the attribute was specified with the [LegacyLenientThis] extended + // attribute, then return undefined. + // "Otherwise, throw a TypeError." + if (!member.has_extended_attribute("LegacyLenientThis")) { + if (member.idlType.generic !== "Promise") { + assert_throws_js(globalOf(desc.get).TypeError, function() { + desc.get.call({}); + }.bind(this), "calling getter on wrong object type must throw TypeError"); + } else { + pendingPromises.push( + promise_rejects_js(a_test, TypeError, desc.get.call({}), + "calling getter on wrong object type must reject the return promise with TypeError")); + } + } else { + assert_equals(desc.get.call({}), undefined, + "calling getter on wrong object type must return undefined"); + } + } + + // "The value of the Function object’s “length” property is the Number + // value 0." + assert_equals(desc.get.length, 0, "getter length must be 0"); + + // "Let name be the string "get " prepended to attribute’s identifier." + // "Perform ! SetFunctionName(F, name)." + assert_equals(desc.get.name, "get " + member.name, + "getter must have the name 'get " + member.name + "'"); + + + // TODO: Test calling setter on the interface prototype (should throw + // TypeError in most cases). + if (member.readonly + && !member.has_extended_attribute("LegacyLenientSetter") + && !member.has_extended_attribute("PutForwards") + && !member.has_extended_attribute("Replaceable")) + { + // "The attribute setter is undefined if the attribute is declared + // readonly and has neither a [PutForwards] nor a [Replaceable] + // extended attribute declared on it." + assert_equals(desc.set, undefined, "setter must be undefined for readonly attributes"); + } + else + { + // "Otherwise, it is a Function object whose behavior when + // invoked is as follows:" + assert_equals(typeof desc.set, "function", "setter must be function for PutForwards, Replaceable, or non-readonly attributes"); + + // "If the attribute is a regular attribute, then:" + if (member.special !== "static") { + // "If /validThis/ is false and the attribute was not specified + // with the [LegacyLenientThis] extended attribute, then throw a + // TypeError." + // "If the attribute is declared with a [Replaceable] extended + // attribute, then: ..." + // "If validThis is false, then return." + if (!member.has_extended_attribute("LegacyLenientThis")) { + assert_throws_js(globalOf(desc.set).TypeError, function() { + desc.set.call({}); + }.bind(this), "calling setter on wrong object type must throw TypeError"); + } else { + assert_equals(desc.set.call({}), undefined, + "calling setter on wrong object type must return undefined"); + } + } + + // "The value of the Function object’s “length” property is the Number + // value 1." + assert_equals(desc.set.length, 1, "setter length must be 1"); + + // "Let name be the string "set " prepended to id." + // "Perform ! SetFunctionName(F, name)." + assert_equals(desc.set.name, "set " + member.name, + "The attribute setter must have the name 'set " + member.name + "'"); + } + + Promise.all(pendingPromises).then(a_test.done.bind(a_test)); +} + +/// IdlInterfaceMember /// +function IdlInterfaceMember(obj) +{ + /** + * obj is an object produced by the WebIDLParser.js "ifMember" production. + * We just forward all properties to this object without modification, + * except for special extAttrs handling. + */ + for (var k in obj.toJSON()) + { + this[k] = obj[k]; + } + if (!("extAttrs" in this)) + { + this.extAttrs = []; + } + + this.isUnforgeable = this.has_extended_attribute("LegacyUnforgeable"); + this.isUnscopable = this.has_extended_attribute("Unscopable"); +} + +IdlInterfaceMember.prototype = Object.create(IdlObject.prototype); + +IdlInterfaceMember.prototype.toJSON = function() { + return this; +}; + +IdlInterfaceMember.prototype.is_to_json_regular_operation = function() { + return this.type == "operation" && this.special !== "static" && this.name == "toJSON"; +}; + +IdlInterfaceMember.prototype.toString = function() { + function formatType(type) { + var result; + if (type.generic) { + result = type.generic + "<" + type.idlType.map(formatType).join(", ") + ">"; + } else if (type.union) { + result = "(" + type.subtype.map(formatType).join(" or ") + ")"; + } else { + result = type.idlType; + } + if (type.nullable) { + result += "?" + } + return result; + } + + if (this.type === "operation") { + var args = this.arguments.map(function(m) { + return [ + m.optional ? "optional " : "", + formatType(m.idlType), + m.variadic ? "..." : "", + ].join(""); + }).join(", "); + return this.name + "(" + args + ")"; + } + + return this.name; +} + +/// Internal helper functions /// +function create_suitable_object(type) +{ + /** + * type is an object produced by the WebIDLParser.js "type" production. We + * return a JavaScript value that matches the type, if we can figure out + * how. + */ + if (type.nullable) + { + return null; + } + switch (type.idlType) + { + case "any": + case "boolean": + return true; + + case "byte": case "octet": case "short": case "unsigned short": + case "long": case "unsigned long": case "long long": + case "unsigned long long": case "float": case "double": + case "unrestricted float": case "unrestricted double": + return 7; + + case "DOMString": + case "ByteString": + case "USVString": + return "foo"; + + case "object": + return {a: "b"}; + + case "Node": + return document.createTextNode("abc"); + } + return null; +} + +/// IdlEnum /// +// Used for IdlArray.prototype.assert_type_is +function IdlEnum(obj) +{ + /** + * obj is an object produced by the WebIDLParser.js "dictionary" + * production. + */ + + /** Self-explanatory. */ + this.name = obj.name; + + /** An array of values produced by the "enum" production. */ + this.values = obj.values; + +} + +IdlEnum.prototype = Object.create(IdlObject.prototype); + +/// IdlCallback /// +// Used for IdlArray.prototype.assert_type_is +function IdlCallback(obj) +{ + /** + * obj is an object produced by the WebIDLParser.js "callback" + * production. + */ + + /** Self-explanatory. */ + this.name = obj.name; + + /** Arguments for the callback. */ + this.arguments = obj.arguments; +} + +IdlCallback.prototype = Object.create(IdlObject.prototype); + +/// IdlTypedef /// +// Used for IdlArray.prototype.assert_type_is +function IdlTypedef(obj) +{ + /** + * obj is an object produced by the WebIDLParser.js "typedef" + * production. + */ + + /** Self-explanatory. */ + this.name = obj.name; + + /** The idlType that we are supposed to be typedeffing to. */ + this.idlType = obj.idlType; + +} + +IdlTypedef.prototype = Object.create(IdlObject.prototype); + +/// IdlNamespace /// +function IdlNamespace(obj) +{ + this.name = obj.name; + this.extAttrs = obj.extAttrs; + this.untested = obj.untested; + /** A back-reference to our IdlArray. */ + this.array = obj.array; + + /** An array of IdlInterfaceMembers. */ + this.members = obj.members.map(m => new IdlInterfaceMember(m)); +} + +IdlNamespace.prototype = Object.create(IdlObject.prototype); + +IdlNamespace.prototype.do_member_operation_asserts = function (memberHolderObject, member, a_test) +{ + var desc = Object.getOwnPropertyDescriptor(memberHolderObject, member.name); + + assert_false("get" in desc, "property should not have a getter"); + assert_false("set" in desc, "property should not have a setter"); + assert_equals( + desc.writable, + !member.isUnforgeable, + "property should be writable if and only if not unforgeable"); + assert_true(desc.enumerable, "property should be enumerable"); + assert_equals( + desc.configurable, + !member.isUnforgeable, + "property should be configurable if and only if not unforgeable"); + + assert_equals( + typeof memberHolderObject[member.name], + "function", + "property must be a function"); + + assert_equals( + memberHolderObject[member.name].length, + minOverloadLength(this.members.filter(function(m) { + return m.type == "operation" && m.name == member.name; + })), + "operation has wrong .length"); + a_test.done(); +} + +IdlNamespace.prototype.test_member_operation = function(member) +{ + if (!shouldRunSubTest(this.name)) { + return; + } + var a_test = subsetTestByKey( + this.name, + async_test, + this.name + ' namespace: operation ' + member); + a_test.step(function() { + assert_own_property( + self[this.name], + member.name, + 'namespace object missing operation ' + format_value(member.name)); + + this.do_member_operation_asserts(self[this.name], member, a_test); + }.bind(this)); +}; + +IdlNamespace.prototype.test_member_attribute = function (member) +{ + if (!shouldRunSubTest(this.name)) { + return; + } + var a_test = subsetTestByKey( + this.name, + async_test, + this.name + ' namespace: attribute ' + member.name); + a_test.step(function() + { + assert_own_property( + self[this.name], + member.name, + this.name + ' does not have property ' + format_value(member.name)); + + var desc = Object.getOwnPropertyDescriptor(self[this.name], member.name); + assert_equals(desc.set, undefined, "setter must be undefined for namespace members"); + a_test.done(); + }.bind(this)); +}; + +IdlNamespace.prototype.test_self = function () +{ + /** + * TODO(lukebjerring): Assert: + * - "Note that unlike interfaces or dictionaries, namespaces do not create types." + */ + + subsetTestByKey(this.name, test, () => { + assert_true(this.extAttrs.every(o => o.name === "Exposed" || o.name === "SecureContext"), + "Only the [Exposed] and [SecureContext] extended attributes are applicable to namespaces"); + assert_true(this.has_extended_attribute("Exposed"), + "Namespaces must be annotated with the [Exposed] extended attribute"); + }, `${this.name} namespace: extended attributes`); + + const namespaceObject = self[this.name]; + + subsetTestByKey(this.name, test, () => { + const desc = Object.getOwnPropertyDescriptor(self, this.name); + assert_equals(desc.value, namespaceObject, `wrong value for ${this.name} namespace object`); + assert_true(desc.writable, "namespace object should be writable"); + assert_false(desc.enumerable, "namespace object should not be enumerable"); + assert_true(desc.configurable, "namespace object should be configurable"); + assert_false("get" in desc, "namespace object should not have a getter"); + assert_false("set" in desc, "namespace object should not have a setter"); + }, `${this.name} namespace: property descriptor`); + + subsetTestByKey(this.name, test, () => { + assert_true(Object.isExtensible(namespaceObject)); + }, `${this.name} namespace: [[Extensible]] is true`); + + subsetTestByKey(this.name, test, () => { + assert_true(namespaceObject instanceof Object); + + if (this.name === "console") { + // https://console.spec.whatwg.org/#console-namespace + const namespacePrototype = Object.getPrototypeOf(namespaceObject); + assert_equals(Reflect.ownKeys(namespacePrototype).length, 0); + assert_equals(Object.getPrototypeOf(namespacePrototype), Object.prototype); + } else { + assert_equals(Object.getPrototypeOf(namespaceObject), Object.prototype); + } + }, `${this.name} namespace: [[Prototype]] is Object.prototype`); + + subsetTestByKey(this.name, test, () => { + assert_equals(typeof namespaceObject, "object"); + }, `${this.name} namespace: typeof is "object"`); + + subsetTestByKey(this.name, test, () => { + assert_equals( + Object.getOwnPropertyDescriptor(namespaceObject, "length"), + undefined, + "length property must be undefined" + ); + }, `${this.name} namespace: has no length property`); + + subsetTestByKey(this.name, test, () => { + assert_equals( + Object.getOwnPropertyDescriptor(namespaceObject, "name"), + undefined, + "name property must be undefined" + ); + }, `${this.name} namespace: has no name property`); +}; + +IdlNamespace.prototype.test = function () +{ + if (!this.untested) { + this.test_self(); + } + + for (const v of Object.values(this.members)) { + switch (v.type) { + + case 'operation': + this.test_member_operation(v); + break; + + case 'attribute': + this.test_member_attribute(v); + break; + + default: + throw 'Invalid namespace member ' + v.name + ': ' + v.type + ' not supported'; + } + }; +}; + +}()); + +/** + * idl_test is a promise_test wrapper that handles the fetching of the IDL, + * avoiding repetitive boilerplate. + * + * @param {String[]} srcs Spec name(s) for source idl files (fetched from + * /interfaces/{name}.idl). + * @param {String[]} deps Spec name(s) for dependency idl files (fetched + * from /interfaces/{name}.idl). Order is important - dependencies from + * each source will only be included if they're already know to be a + * dependency (i.e. have already been seen). + * @param {Function} setup_func Function for extra setup of the idl_array, such + * as adding objects. Do not call idl_array.test() in the setup; it is + * called by this function (idl_test). + */ +function idl_test(srcs, deps, idl_setup_func) { + return promise_test(function (t) { + var idl_array = new IdlArray(); + var setup_error = null; + const validationIgnored = [ + "constructor-member", + "dict-arg-default", + "require-exposed" + ]; + return Promise.all( + srcs.concat(deps).map(fetch_spec)) + .then(function(results) { + const astArray = results.map(result => + WebIDL2.parse(result.idl, { sourceName: result.spec }) + ); + test(() => { + const validations = WebIDL2.validate(astArray) + .filter(v => !validationIgnored.includes(v.ruleName)); + if (validations.length) { + const message = validations.map(v => v.message).join("\n\n"); + throw new Error(message); + } + }, "idl_test validation"); + for (var i = 0; i < srcs.length; i++) { + idl_array.internal_add_idls(astArray[i]); + } + for (var i = srcs.length; i < srcs.length + deps.length; i++) { + idl_array.internal_add_dependency_idls(astArray[i]); + } + }) + .then(function() { + if (idl_setup_func) { + return idl_setup_func(idl_array, t); + } + }) + .catch(function(e) { setup_error = e || 'IDL setup failed.'; }) + .then(function () { + var error = setup_error; + try { + idl_array.test(); // Test what we can. + } catch (e) { + // If testing fails hard here, the original setup error + // is more likely to be the real cause. + error = error || e; + } + if (error) { + throw error; + } + }); + }, 'idl_test setup'); +} + +/** + * fetch_spec is a shorthand for a Promise that fetches the spec's content. + */ +function fetch_spec(spec) { + var url = '/interfaces/' + spec + '.idl'; + return fetch(url).then(function (r) { + if (!r.ok) { + throw new IdlHarnessError("Error fetching " + url + "."); + } + return r.text(); + }).then(idl => ({ spec, idl })); +} +// vim: set expandtab shiftwidth=4 tabstop=4 foldmarker=@{,@} foldmethod=marker: |