feat(store): add ngrxMockEnvironment function to control output durin…

…g testing (#2513)

Closes #2363

modules/store/spec/flags.spec.ts

@@ -0,0 +1,17 @@
+import { isNgrxMockEnvironment, setNgrxMockEnvironment } from '../src/flags';
+
+describe(`Store flags`, () => {
+  describe(`isNgrxMockEnvironment()`, () => {
+    it(`should return false by default`, () => {
+      expect(isNgrxMockEnvironment()).toBe(false);
+    });
+
+    it(`should return the correct flag`, () => {
+      setNgrxMockEnvironment(true);
+      expect(isNgrxMockEnvironment()).toBe(true);
+
+      setNgrxMockEnvironment(false);
+      expect(isNgrxMockEnvironment()).toBe(false);
+    });
+  });
+});

modules/store/spec/selector.spec.ts

@@ -9,6 +9,7 @@ import {
   MemoizedProjection,
 } from '@ngrx/store';
 import { map, distinctUntilChanged } from 'rxjs/operators';
+import { setNgrxMockEnvironment } from '../src';
 
 describe('Selectors', () => {
   let countOne: number;
@@ -513,8 +514,8 @@ describe('Selectors', () => {
         });
       });
 
-      describe('should log when: ', () => {
-        it('feature key does not exist', () => {
+      describe('warning will ', () => {
+        it('be logged when not in mock environment', () => {
           spyOn(ngCore, 'isDevMode').and.returnValue(true);
           const selector = createFeatureSelector('featureB');
 
@@ -525,6 +526,15 @@ describe('Selectors', () => {
             /The feature name "featureB" does not exist/
           );
         });
+
+        it('not be logged when in mock environment', () => {
+          setNgrxMockEnvironment(true);
+          const selector = createFeatureSelector('featureB');
+
+          selector({ featureA: {} });
+
+          expect(warnSpy).not.toHaveBeenCalled();
+        });
       });
     });
   });

modules/store/src/flags.ts

@@ -0,0 +1,7 @@
+let _ngrxMockEnvironment = false;
+export function setNgrxMockEnvironment(value: boolean): void {
+  _ngrxMockEnvironment = value;
+}
+export function isNgrxMockEnvironment(): boolean {
+  return _ngrxMockEnvironment;
+}

modules/store/src/index.ts

@@ -15,6 +15,7 @@ export { createAction, props, union } from './action_creator';
 export { Store, select } from './store';
 export { combineReducers, compose, createReducerFactory } from './utils';
 export { ActionsSubject, INIT } from './actions_subject';
+export { setNgrxMockEnvironment, isNgrxMockEnvironment } from './flags';
 export {
   ReducerManager,
   ReducerObservable,

modules/store/src/selector.ts

@@ -1,5 +1,6 @@
 import { Selector, SelectorWithProps } from './models';
 import { isDevMode } from '@angular/core';
+import { isNgrxMockEnvironment } from '../public_api';
 
 export type AnyFn = (...args: any[]) => any;
 
@@ -613,7 +614,7 @@ export function createFeatureSelector(
 ): MemoizedSelector<any, any> {
   return createSelector((state: any) => {
     const featureState = state[featureName];
-    if (isDevMode() && !(featureName in state)) {
+    if (!isNgrxMockEnvironment() && isDevMode() && !(featureName in state)) {
       console.warn(
         `@ngrx/store: The feature name \"${featureName}\" does ` +
           'not exist in the state, therefore createFeatureSelector ' +

modules/store/testing/spec/mock_store.spec.ts

@@ -1,5 +1,5 @@
 import { TestBed, ComponentFixture } from '@angular/core/testing';
-import { skip, take, tap } from 'rxjs/operators';
+import { skip, take } from 'rxjs/operators';
 import { MockStore, provideMockStore } from '@ngrx/store/testing';
 import {
   Store,
@@ -10,10 +10,12 @@ import {
   createFeatureSelector,
 } from '@ngrx/store';
 import { INCREMENT } from '../../spec/fixtures/counter';
-import { Component, OnInit } from '@angular/core';
+import { Component } from '@angular/core';
 import { Observable } from 'rxjs';
 import { By } from '@angular/platform-browser';
 
+import * as store from '@ngrx/store';
+
 interface TestAppSchema {
   counter1: number;
   counter2: number;
@@ -40,6 +42,8 @@ describe('Mock Store', () => {
   );
 
   beforeEach(() => {
+    spyOn(store, 'setNgrxMockEnvironment').and.callThrough();
+
     TestBed.configureTestingModule({
       providers: [
         provideMockStore({
@@ -63,6 +67,10 @@ describe('Mock Store', () => {
     mockStore.resetSelectors();
   });
 
+  it('should set NgrxMockEnvironment', () => {
+    expect(store.setNgrxMockEnvironment).toHaveBeenCalledWith(true);
+  });
+
   it('should provide the same instance with Store and MockStore', () => {
     const fromStore = TestBed.inject(Store);
     const fromMockStore = TestBed.inject(MockStore);

modules/store/testing/src/testing.ts

@@ -6,6 +6,7 @@ import {
   ReducerManager,
   StateObservable,
   Store,
+  setNgrxMockEnvironment,
 } from '@ngrx/store';
 import { MockStore } from './mock_store';
 import { MockReducerManager } from './mock_reducer_manager';
@@ -20,6 +21,7 @@ export interface MockStoreConfig<T> {
 export function provideMockStore<T = any>(
   config: MockStoreConfig<T> = {}
 ): Provider[] {
+  setNgrxMockEnvironment(true);
   return [
     ActionsSubject,
     MockState,