use MockStore to provide test for menuKeySelector function

src/app/shared/menu/menu.service.spec.ts

@@ -1,41 +1,43 @@
-import * as ngrx from '@ngrx/store';
-import { Store } from '@ngrx/store';
 import { async, TestBed } from '@angular/core/testing';
-import { MenuService } from './menu.service';
-import { cold, hot } from 'jasmine-marbles';
-import { MenuID } from './initial-menus-state';
+
 import { of as observableOf } from 'rxjs';
+import * as ngrx from '@ngrx/store';
+import { Store, StoreModule } from '@ngrx/store';
+import { provideMockStore } from '@ngrx/store/testing';
+import { cold, hot } from 'jasmine-marbles';
+
+import { MenuService } from './menu.service';
+import { MenuID } from './initial-menus-state';
 import {
   ActivateMenuSectionAction,
   AddMenuSectionAction,
-  CollapseMenuAction, CollapseMenuPreviewAction, DeactivateMenuSectionAction,
-  ExpandMenuAction, ExpandMenuPreviewAction, HideMenuAction,
-  RemoveMenuSectionAction, ShowMenuAction, ToggleActiveMenuSectionAction, ToggleMenuAction
+  CollapseMenuAction,
+  CollapseMenuPreviewAction,
+  DeactivateMenuSectionAction,
+  ExpandMenuAction,
+  ExpandMenuPreviewAction,
+  HideMenuAction,
+  RemoveMenuSectionAction,
+  ShowMenuAction,
+  ToggleActiveMenuSectionAction,
+  ToggleMenuAction
 } from './menu.actions';
-import { MenuSection } from './menu.reducer';
+import { MenuSection, menusReducer } from './menu.reducer';
 
 describe('MenuService', () => {
   let service: MenuService;
   let selectSpy;
-  let store;
+  let store: any;
   let fakeMenu;
   let visibleSection1;
   let visibleSection2;
   let hiddenSection3;
   let subSection4;
   let topSections;
+  let initialState;
 
   function init() {
-    store = Object.assign(observableOf({}), {
-      dispatch: () => {/***/
-      }
-    }) as any;
-    fakeMenu = {
-      id: MenuID.ADMIN,
-      collapsed: true,
-      visible: false,
-      previewCollapsed: true
-    } as any;
+
     visibleSection1 = {
       id: 'section',
       visible: true,
@@ -61,35 +63,44 @@ describe('MenuService', () => {
       section_3: hiddenSection3,
       section_4: subSection4
     };
+
+    fakeMenu = {
+      id: MenuID.ADMIN,
+      collapsed: true,
+      visible: false,
+      sections: topSections,
+      previewCollapsed: true
+    } as any;
+
+    initialState = {
+      menus: {
+        'admin-sidebar' : fakeMenu
+      }
+    };
+
   }
 
   beforeEach(async(() => {
     init();
     TestBed.configureTestingModule({
+      imports: [
+        StoreModule.forRoot({ menus: menusReducer })
+      ],
       providers: [
-        { provide: Store, useValue: store },
+        provideMockStore({ initialState }),
         { provide: MenuService, useValue: service }
       ]
     }).compileComponents();
   }));
 
   beforeEach(() => {
+    store = TestBed.get(Store);
     service = new MenuService(store);
-    selectSpy = spyOnProperty(ngrx, 'select');
+    selectSpy = spyOnProperty(ngrx, 'select').and.callThrough();
     spyOn(store, 'dispatch');
   });
 
   describe('getMenu', () => {
-    beforeEach(() => {
-      selectSpy.and.callFake(() => {
-        return () => {
-          return () => hot('a', {
-              a: fakeMenu
-            }
-          );
-        };
-      });
-    });
     it('should return the menu', () => {
 
       const result = service.getMenu(MenuID.ADMIN);
@@ -226,19 +237,9 @@ describe('MenuService', () => {
   });
 
   describe('getMenuSection', () => {
-    beforeEach(() => {
-      selectSpy.and.callFake(() => {
-        return () => {
-          return () => hot('a', {
-              a: hiddenSection3
-            }
-          );
-        };
-      });
-    });
-    it('should return false', () => {
+    it('should return menu section', () => {
 
-      const result = service.getMenuSection(MenuID.ADMIN, 'fakeId');
+      const result = service.getMenuSection(MenuID.ADMIN, 'section_3');
       const expected = cold('b', {
         b: hiddenSection3
       });

src/app/shared/menu/menu.service.ts

@@ -52,7 +52,7 @@ const getSubSectionsFromSectionSelector = (id: string): MemoizedSelector<MenuSta
 @Injectable()
 export class MenuService {
 
-  constructor(private store: Store<any>) {
+  constructor(private store: Store<AppState>) {
   }
 
   /**