test(dynostore): add tests

improves #43

src/app/store/config/dynoStore/dynostore.test.tsx

@@ -0,0 +1,35 @@
+/* eslint-disable import/no-named-as-default-member */
+import { createStore as createReduxStore } from 'redux';
+import dynoStore, { createStore, reloadStore, injectReducers } from './dynoStore';
+
+describe('Dyno Store', () => {
+  it('should have main methods', () => {
+    expect(dynoStore).toHaveProperty('createStore');
+    expect(dynoStore).toHaveProperty('reloadStore');
+    expect(dynoStore).toHaveProperty('injectReducers');
+    expect(dynoStore).toHaveProperty('withStoreModule');
+  });
+
+  it('should create and return a Redux store', () => {
+    const reduxStore = createReduxStore(() => ({}));
+    const store = createStore();
+    expect(JSON.stringify(store, null)).toEqual(JSON.stringify(reduxStore, null));
+  });
+
+  it('should trigger store\'s "dispatch" when reloading the store', () => {
+    const store = createStore();
+    const mockDispatch = jest.spyOn(store, 'dispatch');
+    reloadStore();
+    expect(mockDispatch).toHaveBeenCalledTimes(1);
+    expect(mockDispatch).toHaveBeenCalledWith({ type: '@@DYNO_STORE/RELOAD' });
+  });
+
+  it('should add reducer and reload the store', () => {
+    const store = createStore();
+    const reducer = { INIT_DYNO_STATE: (): {} => ({}) };
+    const mockDispatch = jest.spyOn(store, 'dispatch');
+    injectReducers(reducer);
+    expect(mockDispatch).toHaveBeenCalledTimes(1);
+    expect(mockDispatch).toHaveBeenCalledWith({ type: '@@DYNO_STORE/RELOAD' });
+  });
+});