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// Promise created with default resolution functions (without instances) should
// behave in the same way as normal case.
class MockPromise {
constructor(...args) {
return new Promise(...args);
}
}
for (const expected of ["resolve", "reject"]) {
for (const unexpected of ["resolve", "reject"]) {
let resolve, reject;
const p = new Promise((a, b) => {
resolve = a;
reject = b;
});
// To prevent fast path in Promise.resolve that returns the passed promise,
// modify constructor property.
p.constructor = MockPromise;
// Given `p` has custom constructor, Promise.resolve creates a new promise
// instead of returning `p` itself.
//
// Newly created promise `optimized` does not have resolution function
// instances.
const optimized = Promise.resolve(p);
// Newly created promise `normal` has resolution functions.
const normal = new Promise(r => r(p));
// These calls should be ignored because [[AlreadyResolved]] == true,
if (unexpected === "resolve") {
resolvePromise(optimized, "unexpected resolve optimized");
resolvePromise(normal, "unexpected resolve normal");
} else {
rejectPromise(optimized, "unexpected reject optimized");
rejectPromise(normal, "unexpected reject normal");
}
if (expected === "resolve") {
resolve("resolve");
} else {
reject("reject");
}
let optimized_resolutionValue, optimized_rejectionValue;
optimized.then(
x => { optimized_resolutionValue = x; },
x => { optimized_rejectionValue = x; }
);
let normal_resolutionValue, normal_rejectionValue;
normal.then(
x => { normal_resolutionValue = x; },
x => { normal_rejectionValue = x; }
);
drainJobQueue();
if (expected === "resolve") {
assertEq(optimized_resolutionValue, "resolve",
`${expected} + ${unexpected}`);
assertEq(normal_resolutionValue, "resolve",
`${expected} + ${unexpected}`);
} else {
assertEq(optimized_rejectionValue, "reject",
`${expected} + ${unexpected}`);
assertEq(normal_rejectionValue, "reject",
`${expected} + ${unexpected}`);
}
}
}
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