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// |jit-test|
// Test importing module namespaces
"use strict";
load(libdir + "asserts.js");
load(libdir + "iteration.js");
function parseAndEvaluate(source) {
let m = parseModule(source);
moduleLink(m);
return moduleEvaluate(m);
}
function testHasNames(names, expected) {
assertEq(names.length, expected.length);
expected.forEach(function(name) {
assertEq(names.includes(name), true);
});
}
function testEqualArrays(actual, expected) {
assertEq(Array.isArray(actual), true);
assertEq(Array.isArray(expected), true);
assertEq(actual.length, expected.length);
for (let i = 0; i < expected.length; i++) {
assertEq(actual[i], expected[i]);
}
}
let a = registerModule('a', parseModule(
`// Reflection methods should return these exports alphabetically sorted.
export var b = 2;
export var a = 1;`
));
let b = registerModule('b', parseModule(
`import * as ns from 'a';
export { ns };
export var x = ns.a + ns.b;`
));
moduleLink(b);
moduleEvaluate(b);
testHasNames(getModuleEnvironmentNames(b), ["ns", "x"]);
let ns = getModuleEnvironmentValue(b, "ns");
testHasNames(Object.keys(ns), ["a", "b"]);
assertEq(ns.a, 1);
assertEq(ns.b, 2);
assertEq(ns.c, undefined);
assertEq(getModuleEnvironmentValue(b, "x"), 3);
// Test module namespace internal methods as defined in 9.4.6
assertEq(Object.getPrototypeOf(ns), null);
assertEq(Reflect.setPrototypeOf(ns, null), true);
assertEq(Reflect.setPrototypeOf(ns, Object.prototype), false);
assertThrowsInstanceOf(() => Object.setPrototypeOf(ns, {}), TypeError);
assertThrowsInstanceOf(function() { ns.foo = 1; }, TypeError);
assertEq(Object.isExtensible(ns), false);
Object.preventExtensions(ns);
let desc = Object.getOwnPropertyDescriptor(ns, "a");
assertEq(desc.value, 1);
assertEq(desc.writable, true);
assertEq(desc.enumerable, true);
assertEq(desc.configurable, false);
assertEq(typeof desc.get, "undefined");
assertEq(typeof desc.set, "undefined");
assertThrowsInstanceOf(function() { ns.a = 1; }, TypeError);
delete ns.foo;
assertThrowsInstanceOf(function() { delete ns.a; }, TypeError);
// Test @@toStringTag property
desc = Object.getOwnPropertyDescriptor(ns, Symbol.toStringTag);
assertEq(desc.value, "Module");
assertEq(desc.writable, false);
assertEq(desc.enumerable, false);
assertEq(desc.configurable, false);
assertEq(typeof desc.get, "undefined");
assertEq(typeof desc.set, "undefined");
assertEq(Object.prototype.toString.call(ns), "[object Module]");
// Test [[OwnPropertyKeys]] internal method.
testEqualArrays(Reflect.ownKeys(ns), ["a", "b", Symbol.toStringTag]);
testEqualArrays(Object.getOwnPropertyNames(ns), ["a", "b"]);
testEqualArrays(Object.getOwnPropertySymbols(ns), [Symbol.toStringTag]);
// Test cyclic namespace import and access in module evaluation.
let c = registerModule('c',
parseModule("export let c = 1; import * as ns from 'd'; let d = ns.d;"));
let d = registerModule('d',
parseModule("export let d = 2; import * as ns from 'c'; let c = ns.c;"));
moduleLink(c);
moduleLink(d);
moduleEvaluate(c)
.then(r => {
// We expect the evaluation to throw, so we should not reach this.
assertEq(false, true)
})
.catch(e => {
assertEq(e instanceof ReferenceError, true)
});
// Test cyclic namespace import.
let e = registerModule('e',
parseModule("export let e = 1; import * as ns from 'f'; export function f() { return ns.f }"));
let f = registerModule('f',
parseModule("export let f = 2; import * as ns from 'e'; export function e() { return ns.e }"));
moduleLink(e);
moduleLink(f);
moduleEvaluate(e);
moduleEvaluate(f);
assertEq(e.namespace.f(), 2);
assertEq(f.namespace.e(), 1);
drainJobQueue();
|
