122 lines
4.9 KiB
JavaScript
122 lines
4.9 KiB
JavaScript
// META: global=window,dedicatedworker,shadowrealm
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"use strict";
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test(() => {
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assert_throws_js(TypeError, () => DOMException());
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}, "Cannot construct without new");
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test(() => {
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assert_equals(Object.getPrototypeOf(DOMException.prototype), Error.prototype);
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}, "inherits from Error: prototype-side");
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test(() => {
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assert_equals(Object.getPrototypeOf(DOMException), Function.prototype);
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}, "does not inherit from Error: class-side");
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test(() => {
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const e = new DOMException("message", "name");
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assert_false(e.hasOwnProperty("message"), "property is not own");
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const propDesc = Object.getOwnPropertyDescriptor(DOMException.prototype, "message");
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assert_equals(typeof propDesc.get, "function", "property descriptor is a getter");
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assert_equals(propDesc.set, undefined, "property descriptor is not a setter");
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assert_true(propDesc.enumerable, "property descriptor enumerable");
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assert_true(propDesc.configurable, "property descriptor configurable");
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}, "message property descriptor");
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test(() => {
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const getter = Object.getOwnPropertyDescriptor(DOMException.prototype, "message").get;
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assert_throws_js(TypeError, () => getter.apply({}));
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}, "message getter performs brand checks (i.e. is not [LegacyLenientThis])");
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test(() => {
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const e = new DOMException("message", "name");
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assert_false(e.hasOwnProperty("name"), "property is not own");
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const propDesc = Object.getOwnPropertyDescriptor(DOMException.prototype, "name");
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assert_equals(typeof propDesc.get, "function", "property descriptor is a getter");
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assert_equals(propDesc.set, undefined, "property descriptor is not a setter");
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assert_true(propDesc.enumerable, "property descriptor enumerable");
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assert_true(propDesc.configurable, "property descriptor configurable");
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}, "name property descriptor");
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test(() => {
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const getter = Object.getOwnPropertyDescriptor(DOMException.prototype, "name").get;
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assert_throws_js(TypeError, () => getter.apply({}));
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}, "name getter performs brand checks (i.e. is not [LegacyLenientThis])");
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test(() => {
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const e = new DOMException("message", "name");
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assert_false(e.hasOwnProperty("code"), "property is not own");
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const propDesc = Object.getOwnPropertyDescriptor(DOMException.prototype, "code");
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assert_equals(typeof propDesc.get, "function", "property descriptor is a getter");
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assert_equals(propDesc.set, undefined, "property descriptor is not a setter");
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assert_true(propDesc.enumerable, "property descriptor enumerable");
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assert_true(propDesc.configurable, "property descriptor configurable");
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}, "code property descriptor");
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test(() => {
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const getter = Object.getOwnPropertyDescriptor(DOMException.prototype, "code").get;
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assert_throws_js(TypeError, () => getter.apply({}));
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}, "code getter performs brand checks (i.e. is not [LegacyLenientThis])");
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test(() => {
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const e = new DOMException("message", "InvalidCharacterError");
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assert_equals(e.code, 5, "Initially the code is set to 5");
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Object.defineProperty(e, "name", {
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value: "WrongDocumentError"
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});
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assert_equals(e.code, 5, "The code is still set to 5");
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}, "code property is not affected by shadowing the name property");
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test(() => {
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const e = new DOMException("message", "name");
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assert_equals(Object.prototype.toString.call(e), "[object DOMException]");
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}, "Object.prototype.toString behavior is like other interfaces");
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test(() => {
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const e = new DOMException("message", "name");
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assert_false(e.hasOwnProperty("toString"), "toString must not exist on the instance");
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assert_false(DOMException.prototype.hasOwnProperty("toString"), "toString must not exist on DOMException.prototype");
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assert_equals(typeof e.toString, "function", "toString must still exist (via Error.prototype)");
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}, "Inherits its toString() from Error.prototype");
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test(() => {
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const e = new DOMException("message", "name");
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assert_equals(e.toString(), "name: message",
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"The default Error.prototype.toString() behavior must work on supplied name and message");
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Object.defineProperty(e, "name", { value: "new name" });
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Object.defineProperty(e, "message", { value: "new message" });
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assert_equals(e.toString(), "new name: new message",
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"The default Error.prototype.toString() behavior must work on shadowed names and messages");
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}, "toString() behavior from Error.prototype applies as expected");
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test(() => {
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assert_throws_js(TypeError, () => DOMException.prototype.toString());
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}, "DOMException.prototype.toString() applied to DOMException.prototype throws because of name/message brand checks");
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test(() => {
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let stackOnNormalErrors;
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try {
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throw new Error("normal error");
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} catch (e) {
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stackOnNormalErrors = e.stack;
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}
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let stackOnDOMException;
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try {
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throw new DOMException("message", "name");
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} catch (e) {
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stackOnDOMException = e.stack;
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}
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assert_equals(typeof stackOnDOMException, typeof stackOnNormalErrors, "The typeof values must match");
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}, "If the implementation has a stack property on normal errors, it also does on DOMExceptions");
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