test(page-renderer): added test for component utils

page/renderer/__tests__/ComponentUtilsSpec.js

@@ -0,0 +1,75 @@
+import { toMockedInstance } from 'to-mock';
+
+import ObjectContainer from 'ObjectContainer';
+import ComponentUtils from 'page/renderer/ComponentUtils';
+
+class SomeMockHelper {}
+
+class SomeHelper {}
+
+describe('ComponentUtils', () => {
+  let componentUtils = null;
+
+  const oc = toMockedInstance(ObjectContainer);
+
+  beforeEach(() => {
+    componentUtils = new ComponentUtils(oc);
+  });
+
+  describe('register() method', () => {
+    it('should register utility class under its own real name.', () => {
+      componentUtils.register(SomeMockHelper);
+
+      expect(componentUtils._utilities['SomeMockHelper']).not.toBeUndefined();
+      expect(componentUtils._utilities['SomeMockHelper']).toEqual(
+        SomeMockHelper
+      );
+    });
+
+    it('should register utility class under given alias.', () => {
+      componentUtils.register(SomeMockHelper, 'MockHelper');
+
+      expect(componentUtils._utilities['MockHelper']).not.toBeUndefined();
+      expect(componentUtils._utilities['MockHelper']).toEqual(SomeMockHelper);
+    });
+
+    it('should register multiple classes given in form of an Object.', () => {
+      componentUtils.register({
+        MockHelper: SomeMockHelper,
+        SomeHelper
+      });
+
+      expect(componentUtils._utilities['MockHelper']).toEqual(SomeMockHelper);
+      expect(componentUtils._utilities['SomeHelper']).toEqual(SomeHelper);
+    });
+  });
+
+  describe('getUtils() method.', () => {
+    beforeEach(() => {
+      spyOn(oc, 'get').and.callFake(entity =>
+        typeof entity === 'function' ? new entity() : entity
+      );
+
+      componentUtils.register({
+        SomeMockHelper,
+        SomeHelper
+      });
+    });
+
+    it('should return $Utils constant from OC if created.', () => {
+      spyOn(oc, 'has').and.callFake(entity => entity === '$Utils');
+
+      componentUtils.getUtils();
+
+      expect(oc.get).toHaveBeenCalledWith('$Utils');
+    });
+
+    it('should create instace of each registered class through OC.', () => {
+      const utils = componentUtils.getUtils();
+
+      expect(oc.get).toHaveBeenCalledTimes(2);
+      expect(utils['SomeHelper'] instanceof SomeHelper).toBeTruthy();
+      expect(utils['SomeMockHelper'] instanceof SomeMockHelper).toBeTruthy();
+    });
+  });
+});