Added tests.

Author: kelp404

.circleci/config.yml

@@ -14,6 +14,7 @@ jobs:
       - checkout
       - run: npm install
       - run: npm test
+      - run: npm coveralls
 
   node12:
     working_directory: ~/react-hooks-shared-state

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

@@ -1,6 +1,44 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`Setter it was generated execute without path. 1`] = `
+exports[`Call useState() to get the state and the setter. 1`] = `
+Object {
+  "test": true,
+}
+`;
+
+exports[`Call useState() to get the state and the setter. 2`] = `
+Object {
+  "test": false,
+}
+`;
+
+exports[`Call useState() twice to make sure it did not assign setter again. 1`] = `
+Object {
+  "test": true,
+}
+`;
+
+exports[`Call useState() twice to make sure it did not assign setter again. 2`] = `
+Object {
+  "test": true,
+}
+`;
+
+exports[`Call useState() with a initial state to get the state. 1`] = `
+Object {
+  "test": true,
+}
+`;
+
+exports[`Call useState() with a path and a initial partial state to get the state. 1`] = `true`;
+
+exports[`Setter assign a partial state and call setters with path. 1`] = `
+Object {
+  "test": true,
+}
+`;
+
+exports[`Setter call setState() without path. 1`] = `
 Object {
   "test": true,
 }

__tests__/lib/shared-state.js

@@ -1,3 +1,5 @@
+const React = require('react');
+const renderer = require('react-test-renderer');
 const SharedState = require('../../lib/shared-state');
 
 test('setState() is assign state and call setters.', () => {
@@ -17,9 +19,88 @@ test('setState() is assign state and call setters.', () => {
   expect(shareState.setters[1].set).toBeCalledWith({test: true});
 });
 
-test('Setter it was generated execute without path.', () => {
+test('Setter call setState() without path.', () => {
   const shareState = new SharedState();
   const setState = shareState.generateSetState();
+  jest.spyOn(shareState, 'setState');
   setState({test: true});
   expect(shareState.state).toMatchSnapshot();
+  expect(shareState.setState).toBeCalledWith({test: true});
+});
+
+test('Setter assign a partial state and call setters with path.', () => {
+  const shareState = new SharedState();
+  const setState = shareState.generateSetState('test');
+  shareState.setters = [
+    {
+      path: 'test',
+      set: jest.fn()
+    },
+    {
+      set: jest.fn()
+    }
+  ];
+  setState(true);
+  expect(shareState.state).toMatchSnapshot();
+  expect(shareState.setters[0].set).toBeCalledWith(true);
+  expect(shareState.setters[1].set).toBeCalledWith({test: true});
+});
+
+test('Call useState() to get the state and the setter.', () => {
+  const shareState = new SharedState();
+  jest.spyOn(shareState, 'useState');
+  shareState.setState({test: true});
+  const component = () => {
+    const [state, setState] = shareState.useState();
+    expect(state).toMatchSnapshot();
+    if (state.test) {
+      setState({test: false});
+    }
+
+    return React.createElement('div', null);
+  };
+
+  renderer.create(React.createElement(component, null));
+  expect(shareState.useState).toBeCalledTimes(2);
+});
+
+test('Call useState() with a initial state to get the state.', () => {
+  const shareState = new SharedState();
+  jest.spyOn(shareState, 'useState');
+  const component = () => {
+    const [state] = shareState.useState(null, {test: true});
+    expect(state).toMatchSnapshot();
+    return React.createElement('div', null);
+  };
+
+  renderer.create(React.createElement(component, null));
+  expect(shareState.useState).toBeCalled();
+});
+
+test('Call useState() with a path and a initial partial state to get the state.', () => {
+  const shareState = new SharedState();
+  jest.spyOn(shareState, 'useState');
+  const component = () => {
+    const [state] = shareState.useState('test', true);
+    expect(state).toMatchSnapshot();
+    return React.createElement('div', null);
+  };
+
+  renderer.create(React.createElement(component, null));
+  expect(shareState.useState).toBeCalled();
+});
+
+test('Call useState() twice to make sure it did not assign setter again.', () => {
+  const shareState = new SharedState();
+  jest.spyOn(shareState, 'useState');
+  shareState.setState({test: true});
+  const component = () => {
+    const [state] = shareState.useState();
+    expect(state).toMatchSnapshot();
+    return React.createElement('div', null);
+  };
+
+  renderer.create(React.createElement(component, null));
+  renderer.create(React.createElement(component, null));
+  expect(shareState.useState).toBeCalled();
 });

package.json

@@ -7,6 +7,7 @@
     "start": "./node_modules/webpack-dev-server/bin/webpack-dev-server.js",
     "build": "./node_modules/webpack/bin/webpack.js --env.mode=production",
     "test": "./node_modules/jest/bin/jest.js --coverage",
+    "coveralls": "./node_modules/coveralls/bin/coveralls.js < ./coverage/lcov.info",
     "ncu": "./node_modules/npm-check-updates/bin/ncu"
   },
   "repository": {
@@ -34,6 +35,7 @@
     "@babel/preset-env": "7.4.3",
     "@babel/preset-react": "7.0.0",
     "babel-loader": "8.0.5",
+    "coveralls": "3.0.3",
     "eslint": "5.16.0",
     "eslint-config-xo": "0.26.0",
     "eslint-config-xo-react": "0.19.0",
@@ -43,6 +45,7 @@
     "jest": "24.7.1",
     "npm-check-updates": "3.1.8",
     "react-dom": "16.8.6",
+    "react-test-renderer": "16.8.6",
     "webpack": "4.30.0",
     "webpack-cli": "3.3.0",
     "webpack-dev-server": "3.3.1"