added tests for hostReducer and Header Effects, and switch to typed actions

src/app/header/header.effects.spec.ts

@@ -0,0 +1,53 @@
+import { TestBed, inject } from "@angular/core/testing";
+import { EffectsTestingModule, EffectsRunner } from '@ngrx/effects/testing';
+import { HeaderEffects } from "./header.effects";
+import { HeaderCollapseAction } from "./header.actions";
+import { HostWindowResizeAction } from "../shared/host-window.actions";
+import { routerActions } from "@ngrx/router-store";
+
+describe('HeaderEffects', () => {
+  beforeEach(() => TestBed.configureTestingModule({
+    imports: [
+      EffectsTestingModule
+    ],
+    providers: [
+      HeaderEffects
+    ]
+  }));
+
+  let runner: EffectsRunner;
+  let headerEffects: HeaderEffects;
+
+  beforeEach(inject([
+      EffectsRunner, HeaderEffects
+    ],
+    (_runner, _headerEffects) => {
+      runner = _runner;
+      headerEffects = _headerEffects;
+    }
+  ));
+
+  describe('resize$', () => {
+
+    it('should return a COLLAPSE action in response to a RESIZE action', () => {
+      runner.queue(new HostWindowResizeAction(800,600));
+
+      headerEffects.resize$.subscribe(result => {
+        expect(result).toEqual(new HeaderCollapseAction());
+      });
+    });
+
+  });
+
+  describe('routeChange$', () => {
+
+    it('should return a COLLAPSE action in response to an UPDATE_LOCATION action', () => {
+      runner.queue({ type: routerActions.UPDATE_LOCATION });
+
+      headerEffects.resize$.subscribe(result => {
+        expect(result).toEqual(new HeaderCollapseAction());
+      });
+    });
+
+  });
+});