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import { Observable } from '../Observable';
import { Notification } from '../Notification';
import { ColdObservable } from './ColdObservable';
import { HotObservable } from './HotObservable';
import { TestMessage } from './TestMessage';
import { SubscriptionLog } from './SubscriptionLog';
import { Subscription } from '../Subscription';
import { VirtualTimeScheduler, VirtualAction } from '../scheduler/VirtualTimeScheduler';
const defaultMaxFrame: number = 750;
interface FlushableTest {
ready: boolean;
actual?: any[];
expected?: any[];
}
export type observableToBeFn = (marbles: string, values?: any, errorValue?: any) => void;
export type subscriptionLogsToBeFn = (marbles: string | string[]) => void;
export class TestScheduler extends VirtualTimeScheduler {
private hotObservables: HotObservable<any>[] = [];
private coldObservables: ColdObservable<any>[] = [];
private flushTests: FlushableTest[] = [];
constructor(public assertDeepEqual: (actual: any, expected: any) => boolean | void) {
super(VirtualAction, defaultMaxFrame);
}
createTime(marbles: string): number {
const indexOf: number = marbles.indexOf('|');
if (indexOf === -1) {
throw new Error('marble diagram for time should have a completion marker "|"');
}
return indexOf * TestScheduler.frameTimeFactor;
}
createColdObservable<T>(marbles: string, values?: any, error?: any): ColdObservable<T> {
if (marbles.indexOf('^') !== -1) {
throw new Error('cold observable cannot have subscription offset "^"');
}
if (marbles.indexOf('!') !== -1) {
throw new Error('cold observable cannot have unsubscription marker "!"');
}
const messages = TestScheduler.parseMarbles(marbles, values, error);
const cold = new ColdObservable<T>(messages, this);
this.coldObservables.push(cold);
return cold;
}
createHotObservable<T>(marbles: string, values?: any, error?: any): HotObservable<T> {
if (marbles.indexOf('!') !== -1) {
throw new Error('hot observable cannot have unsubscription marker "!"');
}
const messages = TestScheduler.parseMarbles(marbles, values, error);
const subject = new HotObservable<T>(messages, this);
this.hotObservables.push(subject);
return subject;
}
private materializeInnerObservable(observable: Observable<any>,
outerFrame: number): TestMessage[] {
const messages: TestMessage[] = [];
observable.subscribe((value) => {
messages.push({ frame: this.frame - outerFrame, notification: Notification.createNext(value) });
}, (err) => {
messages.push({ frame: this.frame - outerFrame, notification: Notification.createError(err) });
}, () => {
messages.push({ frame: this.frame - outerFrame, notification: Notification.createComplete() });
});
return messages;
}
expectObservable(observable: Observable<any>,
unsubscriptionMarbles: string = null): ({ toBe: observableToBeFn }) {
const actual: TestMessage[] = [];
const flushTest: FlushableTest = { actual, ready: false };
const unsubscriptionFrame = TestScheduler
.parseMarblesAsSubscriptions(unsubscriptionMarbles).unsubscribedFrame;
let subscription: Subscription;
this.schedule(() => {
subscription = observable.subscribe(x => {
let value = x;
// Support Observable-of-Observables
if (x instanceof Observable) {
value = this.materializeInnerObservable(value, this.frame);
}
actual.push({ frame: this.frame, notification: Notification.createNext(value) });
}, (err) => {
actual.push({ frame: this.frame, notification: Notification.createError(err) });
}, () => {
actual.push({ frame: this.frame, notification: Notification.createComplete() });
});
}, 0);
if (unsubscriptionFrame !== Number.POSITIVE_INFINITY) {
this.schedule(() => subscription.unsubscribe(), unsubscriptionFrame);
}
this.flushTests.push(flushTest);
return {
toBe(marbles: string, values?: any, errorValue?: any) {
flushTest.ready = true;
flushTest.expected = TestScheduler.parseMarbles(marbles, values, errorValue, true);
}
};
}
expectSubscriptions(actualSubscriptionLogs: SubscriptionLog[]): ({ toBe: subscriptionLogsToBeFn }) {
const flushTest: FlushableTest = { actual: actualSubscriptionLogs, ready: false };
this.flushTests.push(flushTest);
return {
toBe(marbles: string | string[]) {
const marblesArray: string[] = (typeof marbles === 'string') ? [marbles] : marbles;
flushTest.ready = true;
flushTest.expected = marblesArray.map(marbles =>
TestScheduler.parseMarblesAsSubscriptions(marbles)
);
}
};
}
flush() {
const hotObservables = this.hotObservables;
while (hotObservables.length > 0) {
hotObservables.shift().setup();
}
super.flush();
const readyFlushTests = this.flushTests.filter(test => test.ready);
while (readyFlushTests.length > 0) {
const test = readyFlushTests.shift();
this.assertDeepEqual(test.actual, test.expected);
}
}
static parseMarblesAsSubscriptions(marbles: string): SubscriptionLog {
if (typeof marbles !== 'string') {
return new SubscriptionLog(Number.POSITIVE_INFINITY);
}
const len = marbles.length;
let groupStart = -1;
let subscriptionFrame = Number.POSITIVE_INFINITY;
let unsubscriptionFrame = Number.POSITIVE_INFINITY;
for (let i = 0; i < len; i++) {
const frame = i * this.frameTimeFactor;
const c = marbles[i];
switch (c) {
case '-':
case ' ':
break;
case '(':
groupStart = frame;
break;
case ')':
groupStart = -1;
break;
case '^':
if (subscriptionFrame !== Number.POSITIVE_INFINITY) {
throw new Error('found a second subscription point \'^\' in a ' +
'subscription marble diagram. There can only be one.');
}
subscriptionFrame = groupStart > -1 ? groupStart : frame;
break;
case '!':
if (unsubscriptionFrame !== Number.POSITIVE_INFINITY) {
throw new Error('found a second subscription point \'^\' in a ' +
'subscription marble diagram. There can only be one.');
}
unsubscriptionFrame = groupStart > -1 ? groupStart : frame;
break;
default:
throw new Error('there can only be \'^\' and \'!\' markers in a ' +
'subscription marble diagram. Found instead \'' + c + '\'.');
}
}
if (unsubscriptionFrame < 0) {
return new SubscriptionLog(subscriptionFrame);
} else {
return new SubscriptionLog(subscriptionFrame, unsubscriptionFrame);
}
}
static parseMarbles(marbles: string,
values?: any,
errorValue?: any,
materializeInnerObservables: boolean = false): TestMessage[] {
if (marbles.indexOf('!') !== -1) {
throw new Error('conventional marble diagrams cannot have the ' +
'unsubscription marker "!"');
}
const len = marbles.length;
const testMessages: TestMessage[] = [];
const subIndex = marbles.indexOf('^');
const frameOffset = subIndex === -1 ? 0 : (subIndex * -this.frameTimeFactor);
const getValue = typeof values !== 'object' ?
(x: any) => x :
(x: any) => {
// Support Observable-of-Observables
if (materializeInnerObservables && values[x] instanceof ColdObservable) {
return values[x].messages;
}
return values[x];
};
let groupStart = -1;
for (let i = 0; i < len; i++) {
const frame = i * this.frameTimeFactor + frameOffset;
let notification: Notification<any>;
const c = marbles[i];
switch (c) {
case '-':
case ' ':
break;
case '(':
groupStart = frame;
break;
case ')':
groupStart = -1;
break;
case '|':
notification = Notification.createComplete();
break;
case '^':
break;
case '#':
notification = Notification.createError(errorValue || 'error');
break;
default:
notification = Notification.createNext(getValue(c));
break;
}
if (notification) {
testMessages.push({ frame: groupStart > -1 ? groupStart : frame, notification });
}
}
return testMessages;
}
}