test(repeatWhen): added dtslint test for repeatWhen ObservableInput notifier

Author: jeremymwells

spec-dtslint/operators/repeatWhen-spec.ts

@@ -1,22 +1,84 @@
 import { of } from 'rxjs';
 import { repeatWhen } from 'rxjs/operators';
+import { asInteropObservable } from '../../spec/helpers/interop-helper';
 
 it('should infer correctly', () => {
-  const o = of(1, 2, 3).pipe(repeatWhen(errors => errors)); // $ExpectType Observable<number>
+  of(1, 2, 3).pipe(repeatWhen(errors => errors)); // $ExpectType Observable<number>
 });
 
 it('should infer correctly when the error observable has a different type', () => {
-  const o = of(1, 2, 3).pipe(repeatWhen(repeatWhen(errors => of('a', 'b', 'c')))); // $ExpectType Observable<number>
+  of(1, 2, 3).pipe(repeatWhen(errors => asInteropObservable(of('a', 'b', 'c')))); // $ExpectType Observable<number>
 });
 
 it('should enforce types', () => {
-  const o = of(1, 2, 3).pipe(repeatWhen()); // $ExpectError
+  of(1, 2, 3).pipe(repeatWhen()); // $ExpectError
+});
+
+it('should accept interop observable notifier', () => {
+  of(1, 2, 3).pipe(repeatWhen(() => asInteropObservable(of(true)))); // $ExpectType Observable<number>
+});
+
+it('should accept promise notifier', () => {
+  of(1, 2, 3).pipe(repeatWhen(() => Promise.resolve(true))); // $ExpectType Observable<number>
+});
+
+it('should async iterable notifier', () => {
+  const asyncRange = {
+    from: 1,
+    to: 2,
+    [Symbol.asyncIterator]() {
+      return {
+        current: this.from,
+        last: this.to,
+        async next() {
+          await Promise.resolve();
+          const done = (this.current > this.last);
+          return {
+            done,
+            value: done ? this.current++ : undefined
+          };
+        }
+      };
+    }
+  };
+  of(1, 2, 3).pipe(repeatWhen(() => asyncRange)); // $ExpectType Observable<number>
+});
+
+it('should accept iterable notifier', () => {
+  const syncRange = {
+    from: 1,
+    to: 2,
+    [Symbol.iterator]() {
+      return {
+        current: this.from,
+        last: this.to,
+        next() {
+          const done = (this.current > this.last);
+          return {
+            done,
+            value: done ? this.current++ : undefined
+          };
+        }
+      };
+    }
+  };
+  of(1, 2, 3).pipe(repeatWhen(() => syncRange)); // $ExpectType Observable<number>
+});
+
+it('should accept readable stream notifier', () => {
+  const readableStream = new ReadableStream<string>({
+    pull(controller) {
+      controller.enqueue('x');
+      controller.close();
+    },
+  });
+  of(1, 2, 3).pipe(repeatWhen(() => readableStream)); // $ExpectType Observable<number>
 });
 
 it('should enforce types of the notifier', () => {
-  const o = of(1, 2, 3).pipe(repeatWhen(() => 8)); // $ExpectError
+  of(1, 2, 3).pipe(repeatWhen(() => 8)); // $ExpectError
 });
 
 it('should be deprecated', () => {
-  const o = of(1, 2, 3).pipe(repeatWhen(() => of(true))); // $ExpectDeprecation
+  of(1, 2, 3).pipe(repeatWhen(() => of(true))); // $ExpectDeprecation
 });