fix(testscheduler): type arguments to Observable creation functions (#…

…3928)

spec/schedulers/TestScheduler-spec.ts

@@ -145,7 +145,7 @@ describe('TestScheduler', () => {
     it('should create a cold observable', () => {
       const expected = ['A', 'B'];
       const scheduler = new TestScheduler(null);
-      const source = scheduler.createColdObservable<string>('--a---b--|', { a: 'A', b: 'B' });
+      const source = scheduler.createColdObservable('--a---b--|', { a: 'A', b: 'B' });
       expect(source).to.be.an.instanceOf(Observable);
       source.subscribe(x => {
         expect(x).to.equal(expected.shift());
@@ -159,7 +159,7 @@ describe('TestScheduler', () => {
     it('should create a cold observable', () => {
       const expected = ['A', 'B'];
       const scheduler = new TestScheduler(null);
-      const source = scheduler.createHotObservable<string>('--a---b--|', { a: 'A', b: 'B' });
+      const source = scheduler.createHotObservable('--a---b--|', { a: 'A', b: 'B' });
       expect(source).to.be.an.instanceof(Subject);
       source.subscribe(x => {
         expect(x).to.equal(expected.shift());

src/internal/testing/TestScheduler.ts

@@ -45,7 +45,12 @@ export class TestScheduler extends VirtualTimeScheduler {
     return indexOf * TestScheduler.frameTimeFactor;
   }
 
-  createColdObservable<T>(marbles: string, values?: any, error?: any): ColdObservable<T> {
+  /**
+   * @param marbles A diagram in the marble DSL. Letters map to keys in `values` if provided.
+   * @param values Values to use for the letters in `marbles`. If ommitted, the letters themselves are used.
+   * @param error The error to use for the `#` marble (if present).
+   */
+  createColdObservable<T = string>(marbles: string, values?: { [marble: string]: T }, error?: any): ColdObservable<T> {
     if (marbles.indexOf('^') !== -1) {
       throw new Error('cold observable cannot have subscription offset "^"');
     }
@@ -58,7 +63,12 @@ export class TestScheduler extends VirtualTimeScheduler {
     return cold;
   }
 
-  createHotObservable<T>(marbles: string, values?: any, error?: any): HotObservable<T> {
+  /**
+   * @param marbles A diagram in the marble DSL. Letters map to keys in `values` if provided.
+   * @param values Values to use for the letters in `marbles`. If ommitted, the letters themselves are used.
+   * @param error The error to use for the `#` marble (if present).
+   */
+  createHotObservable<T = string>(marbles: string, values?: { [marble: string]: T }, error?: any): HotObservable<T> {
     if (marbles.indexOf('!') !== -1) {
       throw new Error('hot observable cannot have unsubscription marker "!"');
     }