store

Author: JohnFulpWillard

tgui/packages/common/redux.js

@@ -0,0 +1,61 @@
+import { Action, Reducer, applyMiddleware, combineReducers, createAction, createStore } from './redux';
+
+// Dummy Reducer
+const counterReducer: Reducer<number, Action<string>> = (state = 0, action) => {
+  switch (action.type) {
+    case 'INCREMENT':
+      return state + 1;
+    case 'DECREMENT':
+      return state - 1;
+    default:
+      return state;
+  }
+};
+
+// Dummy Middleware
+const loggingMiddleware = (storeApi) => (next) => (action) => {
+  console.log('Middleware:', action);
+  return next(action);
+};
+
+// Dummy Action Creators
+const increment = createAction('INCREMENT');
+const decrement = createAction('DECREMENT');
+
+describe('Redux implementation tests', () => {
+  test('createStore works', () => {
+    const store = createStore(counterReducer);
+    expect(store.getState()).toBe(0);
+  });
+
+  test('createStore with applyMiddleware works', () => {
+    const store = createStore(
+      counterReducer,
+      applyMiddleware(loggingMiddleware)
+    );
+    expect(store.getState()).toBe(0);
+  });
+
+  test('dispatch works', () => {
+    const store = createStore(counterReducer);
+    store.dispatch(increment());
+    expect(store.getState()).toBe(1);
+    store.dispatch(decrement());
+    expect(store.getState()).toBe(0);
+  });
+
+  test('combineReducers works', () => {
+    const rootReducer = combineReducers({
+      counter: counterReducer,
+    });
+    const store = createStore(rootReducer);
+    expect(store.getState()).toEqual({ counter: 0 });
+  });
+
+  test('createAction works', () => {
+    const incrementAction = increment();
+    expect(incrementAction).toEqual({ type: 'INCREMENT' });
+    const decrementAction = decrement();
+    expect(decrementAction).toEqual({ type: 'DECREMENT' });
+  });
+});