116 lines
3.6 KiB
JavaScript
116 lines
3.6 KiB
JavaScript
import {ddescribe, describe, it, iit, xit, expect, beforeEach, afterEach,
|
|
AsyncTestCompleter, inject, proxy, SpyObject} from 'angular2/test_lib';
|
|
import {IMPLEMENTS} from 'angular2/src/facade/lang';
|
|
|
|
import {WrappedValue} from 'angular2/src/change_detection/pipes/pipe';
|
|
import {ObservablePipe} from 'angular2/src/change_detection/pipes/observable_pipe';
|
|
import {ChangeDetectorRef} from 'angular2/src/change_detection/change_detector_ref';
|
|
import {EventEmitter, Observable, ObservableWrapper, TimerWrapper} from 'angular2/src/facade/async';
|
|
|
|
export function main() {
|
|
describe("ObservablePipe", () => {
|
|
var emitter;
|
|
var pipe;
|
|
var ref;
|
|
var message = new Object();
|
|
|
|
beforeEach(() => {
|
|
emitter = new EventEmitter();
|
|
ref = new SpyChangeDetectorRef();
|
|
pipe = new ObservablePipe(ref);
|
|
});
|
|
|
|
describe("supports", () => {
|
|
it("should support observables", () => {
|
|
expect(pipe.supports(emitter)).toBe(true);
|
|
});
|
|
|
|
it("should not support other objects", () => {
|
|
expect(pipe.supports("string")).toBe(false);
|
|
expect(pipe.supports(null)).toBe(false);
|
|
});
|
|
});
|
|
|
|
describe("transform", () => {
|
|
it("should return null when subscribing to an observable", () => {
|
|
expect(pipe.transform(emitter)).toBe(null);
|
|
});
|
|
|
|
it("should return the latest available value wrapped", inject([AsyncTestCompleter], (async) => {
|
|
pipe.transform(emitter);
|
|
|
|
ObservableWrapper.callNext(emitter, message);
|
|
|
|
TimerWrapper.setTimeout(() => {
|
|
expect(pipe.transform(emitter)).toEqual(new WrappedValue(message));
|
|
async.done();
|
|
}, 0)
|
|
}));
|
|
|
|
it("should return same value when nothing has changed since the last call",
|
|
inject([AsyncTestCompleter], (async) => {
|
|
pipe.transform(emitter);
|
|
ObservableWrapper.callNext(emitter, message);
|
|
|
|
TimerWrapper.setTimeout(() => {
|
|
pipe.transform(emitter);
|
|
expect(pipe.transform(emitter)).toBe(message);
|
|
async.done();
|
|
}, 0)
|
|
}));
|
|
|
|
it("should dispose of the existing subscription when subscribing to a new observable",
|
|
inject([AsyncTestCompleter], (async) => {
|
|
pipe.transform(emitter);
|
|
|
|
var newEmitter = new EventEmitter();
|
|
expect(pipe.transform(newEmitter)).toBe(null);
|
|
|
|
// this should not affect the pipe
|
|
ObservableWrapper.callNext(emitter, message);
|
|
|
|
TimerWrapper.setTimeout(() => {
|
|
expect(pipe.transform(newEmitter)).toBe(null);
|
|
async.done();
|
|
}, 0)
|
|
}));
|
|
|
|
it("should request a change detection check upon receiving a new value",
|
|
inject([AsyncTestCompleter], (async) => {
|
|
pipe.transform(emitter);
|
|
ObservableWrapper.callNext(emitter, message);
|
|
|
|
TimerWrapper.setTimeout(() => {
|
|
expect(ref.spy('requestCheck')).toHaveBeenCalled();
|
|
async.done();
|
|
}, 0)
|
|
}));
|
|
});
|
|
|
|
describe("onDestroy", () => {
|
|
it("should do nothing when no subscription", () => {
|
|
expect(() => pipe.onDestroy()).not.toThrow();
|
|
});
|
|
|
|
it("should dispose of the existing subscription", inject([AsyncTestCompleter], (async) => {
|
|
pipe.transform(emitter);
|
|
pipe.onDestroy();
|
|
|
|
ObservableWrapper.callNext(emitter, message);
|
|
|
|
TimerWrapper.setTimeout(() => {
|
|
expect(pipe.transform(emitter)).toBe(null);
|
|
async.done();
|
|
}, 0)
|
|
}));
|
|
});
|
|
});
|
|
}
|
|
|
|
@proxy
|
|
@IMPLEMENTS(ChangeDetectorRef)
|
|
class SpyChangeDetectorRef extends SpyObject {
|
|
constructor(){super(ChangeDetectorRef);}
|
|
noSuchMethod(m){return super.noSuchMethod(m)}
|
|
}
|