Added tests.

Author: kelp404

README.md

@@ -1,5 +1,6 @@
 # react-hooks-shared-state
 [![npm version](https://badge.fury.io/js/react-hooks-shared-state.svg)](https://www.npmjs.com/package/react-hooks-shared-state)
+[![Coverage Status](https://coveralls.io/repos/github/kelp404/react-hooks-shared-state/badge.svg?branch=master)](https://coveralls.io/github/kelp404/react-hooks-shared-state?branch=master)
 [![CircleCI](https://circleci.com/gh/kelp404/react-hooks-shared-state.svg?style=svg)](https://circleci.com/gh/kelp404/react-hooks-shared-state)
 
 A global state for React with Hooks API.

__tests__/lib/__snapshots__/shared-state.js.snap

@@ -32,6 +32,10 @@ Object {
 
 exports[`Call useState() with a path and a initial partial state to get the state. 1`] = `true`;
 
+exports[`Call useState() with a path to get the state and the setter. 1`] = `true`;
+
+exports[`Call useState() with a path to get the state and the setter. 2`] = `false`;
+
 exports[`Setter assign a partial state and call setters with path. 1`] = `
 Object {
   "test": true,

__tests__/lib/shared-state.js

@@ -77,6 +77,24 @@ test('Call useState() with a initial state to get the state.', () => {
   expect(shareState.useState).toBeCalled();
 });
 
+test('Call useState() with a path to get the state and the setter.', () => {
+  const shareState = new SharedState();
+  jest.spyOn(shareState, 'useState');
+  shareState.setState({other: true});
+  const component = () => {
+    const [state, setState] = shareState.useState('test', true);
+    expect(state).toMatchSnapshot();
+    if (state) {
+      setState(false);
+    }
+
+    return React.createElement('div', null);
+  };
+
+  renderer.create(React.createElement(component, null));
+  expect(shareState.useState).toBeCalledTimes(2);
+});
+
 test('Call useState() with a path and a initial partial state to get the state.', () => {
   const shareState = new SharedState();
   jest.spyOn(shareState, 'useState');