[Defect 2066] add extraneous-dependencies unit tests

Author: jeromeh

Diff for: tests/files/node_modules/rxjs/index.js

@@ -11,7 +11,8 @@
     "@org/package": "^1.0.0",
     "jquery": "^3.1.0",
     "lodash.cond": "^4.3.0",
-    "pkg-up": "^1.0.0"
+    "pkg-up": "^1.0.0",
+    "rxjs": "^1.0.0"
   },
   "optionalDependencies": {
     "lodash.isarray": "^4.0.0"

Diff for: tests/files/node_modules/rxjs/operators/index.js

@@ -88,7 +88,7 @@ ruleTester.run('no-extraneous-dependencies', rule, {
     }),
     test({
       code: `
-        // @flow                                                                                                                                                                                                   
+        // @flow
         import typeof TypeScriptModule from 'typescript';
       `,
       options: [{ packageDir: packageDirWithFlowTyped }],
@@ -150,6 +150,10 @@ ruleTester.run('no-extraneous-dependencies', rule, {
       code: 'import "@generated/bar/and/sub/path"',
       settings: { 'import/core-modules': ['@generated/bar'] },
     }),
+    // check if "rxjs" dependency declaration fix the "rxjs/operators subpackage
+    test({
+      code: 'import "rxjs/operators"',
+    }),
   ],
   invalid: [
     test({