Create no-nested-pipe.ts

added new test file for no-nested-pipe valid and invalid scenarios

Author: birenrao

tests/rules/no-nested-pipe.ts

@@ -0,0 +1,94 @@
+/**
+ * @license Use of this source code is governed by an MIT-style license that
+ * can be found in the LICENSE file at https://github.com/cartant/eslint-plugin-rxjs
+ */
+
+import { stripIndent } from "common-tags";
+import { fromFixture } from "eslint-etc";
+import rule = require("../../source/rules/no-nested-pipe");
+import { ruleTester } from "../utils";
+
+ruleTester({ types: true }).run("no-nested-pipe", rule, {
+  valid: [
+    stripIndent`
+      // not nested in pipe
+      import { Observable,of,switchMap } from "rxjs";
+      of(47).pipe(switchMap(value => {
+       console.log('new' ,value);
+      })).subscribe(value => {
+        console.log(value);
+      })
+    `,
+    stripIndent`
+    // not nested in pipe
+    import { Observable,switchMap } from "rxjs";
+    of(47).pipe(switchMap(value => {
+     return someFunction(value)
+    })).subscribe(value => {
+      console.log(value);
+    });
+    function someFunction(someParam: Observable<any>): Observable<any> { 
+    return of(43).pipe(
+      switchMap(value  =>  {value + someParam})
+      )
+     }
+  `,
+    stripIndent`
+  // not nested in pipe
+  import { Observable,switchMap } from "rxjs";
+  of(47).pipe(switchMap(value => {
+   return someFunction1(value)
+  }),
+  switchMap(value => {
+   return someFunction2(value)
+  })
+  ).subscribe(value => {
+    console.log(value);
+  });
+  function someFunction1(someParam: Observable<any>): Observable<any> { 
+  return of(43).pipe(
+    switchMap(value  =>  {value + someParam})
+    )
+   };
+    function someFunction2(someParam: Observable<any>): Observable<any> { 
+  return of(43).pipe(
+    switchMap(value  =>  {value + someParam})
+    )
+   }
+`,
+  ],
+  invalid: [
+    fromFixture(
+      stripIndent`
+        // nested in pipe
+        import { of,switchMap,tap } from "rxjs";
+        of("foo").pipe(
+        switchMap(value => { 
+        return of("bar").pipe(tap(value => { console.log(value)})
+                         ~~~~ [forbidden]
+        )})
+        ).subscribe(value => {
+        console.log(value);
+      });
+      `
+    ),
+    fromFixture(
+      stripIndent`
+        // nested in pipe
+        import { of,switchMap,tap } from "rxjs";
+        of("foo").pipe(
+        switchMap(value => { 
+        return of("bar").pipe(tap(value => { console.log(value)})
+                         ~~~~ [forbidden]
+        )}),
+         switchMap(value => { 
+        return of("bar").pipe(tap(value => { console.log(value)})
+                         ~~~~ [forbidden]
+        )})
+        ).subscribe(value => {
+        console.log(value);
+      });
+      `
+    ),
+  ],
+});