angular-docs-cn/packages/zone.js/promise.finally.spec.js

358 lines
11 KiB
JavaScript

'use strict';
var assert = require('assert');
var adapter = require('./promise-adapter');
var P = global[Zone.__symbol__('Promise')];
var someRejectionReason = {message: 'some rejection reason'};
var anotherReason = {message: 'another rejection reason'};
process.on(
'unhandledRejection', function(reason, promise) { console.log('unhandledRejection', reason); });
describe('mocha promise sanity check', () => {
it('passes with a resolved promise', () => { return P.resolve(3); });
it('passes with a rejected then resolved promise',
() => { return P.reject(someRejectionReason).catch(x => 'this should be resolved'); });
var ifPromiseIt = P === Promise ? it : it.skip;
ifPromiseIt('is the native Promise', () => { assert.equal(P, Promise); });
});
describe('onFinally', () => {
describe('no callback', () => {
specify('from resolved', (done) => {
adapter.resolved(3)
.then((x) => {
assert.strictEqual(x, 3);
return x;
})
.finally()
.then(
function onFulfilled(x) {
assert.strictEqual(x, 3);
done();
},
function onRejected() { done(new Error('should not be called')); });
});
specify('from rejected', (done) => {
adapter.rejected(someRejectionReason)
.catch((e) => {
assert.strictEqual(e, someRejectionReason);
throw e;
})
.finally()
.then(
function onFulfilled() { done(new Error('should not be called')); },
function onRejected(reason) {
assert.strictEqual(reason, someRejectionReason);
done();
});
});
});
describe('throws an exception', () => {
specify('from resolved', (done) => {
adapter.resolved(3)
.then((x) => {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
throw someRejectionReason;
})
.then(
function onFulfilled() { done(new Error('should not be called')); },
function onRejected(reason) {
assert.strictEqual(reason, someRejectionReason);
done();
});
});
specify('from rejected', (done) => {
adapter.rejected(anotherReason)
.finally(function onFinally() {
assert(arguments.length === 0);
throw someRejectionReason;
})
.then(
function onFulfilled() { done(new Error('should not be called')); },
function onRejected(reason) {
assert.strictEqual(reason, someRejectionReason);
done();
});
});
});
describe('returns a non-promise', () => {
specify('from resolved', (done) => {
adapter.resolved(3)
.then((x) => {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
return 4;
})
.then(
function onFulfilled(x) {
assert.strictEqual(x, 3);
done();
},
function onRejected() { done(new Error('should not be called')); });
});
specify('from rejected', (done) => {
adapter.rejected(anotherReason)
.catch((e) => {
assert.strictEqual(e, anotherReason);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
throw someRejectionReason;
})
.then(
function onFulfilled() { done(new Error('should not be called')); },
function onRejected(e) {
assert.strictEqual(e, someRejectionReason);
done();
});
});
});
describe('returns a pending-forever promise', () => {
specify('from resolved', (done) => {
var timeout;
adapter.resolved(3)
.then((x) => {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
timeout = setTimeout(done, 0.1e3);
return new P(() => {}); // forever pending
})
.then(
function onFulfilled(x) {
clearTimeout(timeout);
done(new Error('should not be called'));
},
function onRejected() {
clearTimeout(timeout);
done(new Error('should not be called'));
});
});
specify('from rejected', (done) => {
var timeout;
adapter.rejected(someRejectionReason)
.catch((e) => {
assert.strictEqual(e, someRejectionReason);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
timeout = setTimeout(done, 0.1e3);
return new P(() => {}); // forever pending
})
.then(
function onFulfilled(x) {
clearTimeout(timeout);
done(new Error('should not be called'));
},
function onRejected() {
clearTimeout(timeout);
done(new Error('should not be called'));
});
});
});
describe('returns an immediately-fulfilled promise', () => {
specify('from resolved', (done) => {
adapter.resolved(3)
.then((x) => {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
return adapter.resolved(4);
})
.then(
function onFulfilled(x) {
assert.strictEqual(x, 3);
done();
},
function onRejected() { done(new Error('should not be called')); });
});
specify('from rejected', (done) => {
adapter.rejected(someRejectionReason)
.catch((e) => {
assert.strictEqual(e, someRejectionReason);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
return adapter.resolved(4);
})
.then(
function onFulfilled() { done(new Error('should not be called')); },
function onRejected(e) {
assert.strictEqual(e, someRejectionReason);
done();
});
});
});
describe('returns an immediately-rejected promise', () => {
specify('from resolved ', (done) => {
adapter.resolved(3)
.then((x) => {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
return adapter.rejected(4);
})
.then(
function onFulfilled(x) { done(new Error('should not be called')); },
function onRejected(e) {
assert.strictEqual(e, 4);
done();
});
});
specify('from rejected', (done) => {
const newReason = {};
adapter.rejected(someRejectionReason)
.catch((e) => {
assert.strictEqual(e, someRejectionReason);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
return adapter.rejected(newReason);
})
.then(
function onFulfilled(x) { done(new Error('should not be called')); },
function onRejected(e) {
assert.strictEqual(e, newReason);
done();
});
});
});
describe('returns a fulfilled-after-a-second promise', () => {
specify('from resolved', (done) => {
var timeout;
adapter.resolved(3)
.then((x) => {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
timeout = setTimeout(done, 1.5e3);
return new P((resolve) => { setTimeout(() => resolve(4), 1e3); });
})
.then(
function onFulfilled(x) {
clearTimeout(timeout);
assert.strictEqual(x, 3);
done();
},
function onRejected() {
clearTimeout(timeout);
done(new Error('should not be called'));
});
});
specify('from rejected', (done) => {
var timeout;
adapter.rejected(3)
.catch((e) => {
assert.strictEqual(e, 3);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
timeout = setTimeout(done, 1.5e3);
return new P((resolve) => { setTimeout(() => resolve(4), 1e3); });
})
.then(
function onFulfilled() {
clearTimeout(timeout);
done(new Error('should not be called'));
},
function onRejected(e) {
clearTimeout(timeout);
assert.strictEqual(e, 3);
done();
});
});
});
describe('returns a rejected-after-a-second promise', () => {
specify('from resolved', (done) => {
var timeout;
adapter.resolved(3)
.then((x) => {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
timeout = setTimeout(done, 1.5e3);
return new P((resolve, reject) => { setTimeout(() => reject(4), 1e3); });
})
.then(
function onFulfilled() {
clearTimeout(timeout);
done(new Error('should not be called'));
},
function onRejected(e) {
clearTimeout(timeout);
assert.strictEqual(e, 4);
done();
});
});
specify('from rejected', (done) => {
var timeout;
adapter.rejected(someRejectionReason)
.catch((e) => {
assert.strictEqual(e, someRejectionReason);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
timeout = setTimeout(done, 1.5e3);
return new P((resolve, reject) => { setTimeout(() => reject(anotherReason), 1e3); });
})
.then(
function onFulfilled() {
clearTimeout(timeout);
done(new Error('should not be called'));
},
function onRejected(e) {
clearTimeout(timeout);
assert.strictEqual(e, anotherReason);
done();
});
});
});
specify('has the correct property descriptor', () => {
var descriptor = Object.getOwnPropertyDescriptor(Promise.prototype, 'finally');
assert.strictEqual(descriptor.writable, true);
assert.strictEqual(descriptor.configurable, true);
});
});