97 lines
3.1 KiB
JavaScript
97 lines
3.1 KiB
JavaScript
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import {ddescribe, describe, it, iit, xit, expect, beforeEach, afterEach,
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AsyncTestCompleter, inject, proxy, SpyObject} from 'angular2/test_lib';
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import {IMPLEMENTS} from 'angular2/src/facade/lang';
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import {PromisePipe} from 'angular2/src/change_detection/pipes/promise_pipe';
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import {WrappedValue} from 'angular2/src/change_detection/pipes/pipe';
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import {ChangeDetectorRef} from 'angular2/src/change_detection/change_detector_ref';
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import {PromiseWrapper} from 'angular2/src/facade/async';
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export function main() {
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describe("PromisePipe", () => {
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var message = new Object();
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var pipe;
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var completer;
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var ref;
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beforeEach(() => {
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completer = PromiseWrapper.completer();
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ref = new SpyChangeDetectorRef();
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pipe = new PromisePipe(ref);
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});
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describe("supports", () => {
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it("should support promises", () => {
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expect(pipe.supports(completer.promise)).toBe(true);
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});
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it("should not support other objects", () => {
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expect(pipe.supports("string")).toBe(false);
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expect(pipe.supports(null)).toBe(false);
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});
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});
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describe("transform", () => {
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it("should return null when subscribing to a promise", () => {
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expect(pipe.transform(completer.promise)).toBe(null);
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});
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it("should return the latest available value", inject([AsyncTestCompleter], (async) => {
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pipe.transform(completer.promise);
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completer.resolve(message);
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PromiseWrapper.setTimeout(() => {
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expect(pipe.transform(completer.promise)).toEqual(new WrappedValue(message));
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async.done();
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}, 0)
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}));
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it("should return unwrapped value when nothing has changed since the last call",
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inject([AsyncTestCompleter], (async) => {
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pipe.transform(completer.promise);
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completer.resolve(message);
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PromiseWrapper.setTimeout(() => {
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pipe.transform(completer.promise);
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expect(pipe.transform(completer.promise)).toBe(message);
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async.done();
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}, 0)
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}));
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it("should dispose of the existing subscription when subscribing to a new promise",
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inject([AsyncTestCompleter], (async) => {
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pipe.transform(completer.promise);
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var newCompleter = PromiseWrapper.completer();
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expect(pipe.transform(newCompleter.promise)).toBe(null);
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// this should not affect the pipe, so it should return WrappedValue
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completer.resolve(message);
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PromiseWrapper.setTimeout(() => {
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expect(pipe.transform(newCompleter.promise)).toBe(null);
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async.done();
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}, 0)
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}));
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it("should request a change detection check upon receiving a new value",
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inject([AsyncTestCompleter], (async) => {
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pipe.transform(completer.promise);
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completer.resolve(message);
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PromiseWrapper.setTimeout(() => {
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expect(ref.spy('requestCheck')).toHaveBeenCalled();
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async.done();
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}, 0)
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}));
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});
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});
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}
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@proxy
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@IMPLEMENTS(ChangeDetectorRef)
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class SpyChangeDetectorRef extends SpyObject {
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constructor(){super(ChangeDetectorRef);}
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noSuchMethod(m){return super.noSuchMethod(m)}
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}
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