test for #33

__tests__/04_issue33_spec.js

@@ -0,0 +1,33 @@
+import React from 'react';
+import { render, fireEvent, cleanup } from '@testing-library/react';
+
+import { createGlobalState } from '../src/index';
+
+describe('issue #33 spec', () => {
+  afterEach(cleanup);
+
+  it('should sync getGlobaState with useGlobalState', () => {
+    const initialState = {
+      count1: 0,
+    };
+    const { GlobalStateProvider, useGlobalState, getGlobalState } = createGlobalState(initialState);
+    const Counter = () => {
+      const [value, update] = useGlobalState('count1');
+      return (
+        <div>
+          <span>{value}</span>
+          <button type="button" onClick={() => update(value + 1)}>+1</button>
+        </div>
+      );
+    };
+    const App = () => (
+      <GlobalStateProvider>
+        <Counter />
+      </GlobalStateProvider>
+    );
+    const { getAllByText, container } = render(<App />);
+    expect(container.querySelector('span').textContent).toBe(String(getGlobalState('count1')));
+    fireEvent.click(getAllByText('+1')[0]);
+    expect(container.querySelector('span').textContent).toBe(String(getGlobalState('count1')));
+  });
+});