--- id: 5a24c314108439a4d4036177 title: Write a Simple Counter challengeType: 6 isRequired: false videoUrl: '' localeTitle: '' --- ## Description undefined ## Instructions undefined ## Tests
```yml tests: - text: '' testString: 'assert((() => { const mockedComponent = Enzyme.mount(React.createElement(Counter)); return (mockedComponent.find(".inc").text() === "Increment!" && mockedComponent.find(".dec").text() === "Decrement!" && mockedComponent.find(".reset").text() === "Reset"); })(), "Counter should return a div element which contains three buttons with text content in this order Increment!, Decrement!, Reset.");' - text: '' testString: 'assert.strictEqual(Enzyme.mount(React.createElement(Counter)).state("count"), 0, "The state of Counter should initialize with a count property set to 0.");' - text: '' testString: 'async () => { const waitForIt = (fn) => new Promise((resolve, reject) => setTimeout(() => resolve(fn()), 250)); const mockedComponent = Enzyme.mount(React.createElement(Counter)); const first = () => { mockedComponent.setState({ count: 0 }); return waitForIt(() => mockedComponent.state("count")); }; const second = () => { mockedComponent.find(".inc").simulate("click"); return waitForIt(() => mockedComponent.state("count")); }; const firstValue = await first(); const secondValue = await second(); assert(firstValue === 0 && secondValue === 1, "Clicking the increment button should increment the count by 1."); }; ' - text: '' testString: 'async () => { const waitForIt = (fn) => new Promise((resolve, reject) => setTimeout(() => resolve(fn()), 250)); const mockedComponent = Enzyme.mount(React.createElement(Counter)); const first = () => { mockedComponent.setState({ count: 0 }); return waitForIt(() => mockedComponent.state("count")); }; const second = () => { mockedComponent.find(".dec").simulate("click"); return waitForIt(() => mockedComponent.state("count")); }; const firstValue = await first(); const secondValue = await second(); assert(firstValue === 0 && secondValue === -1, "Clicking the decrement button should decrement the count by 1."); }; ' - text: '' testString: 'async () => { const waitForIt = (fn) => new Promise((resolve, reject) => setTimeout(() => resolve(fn()), 250)); const mockedComponent = Enzyme.mount(React.createElement(Counter)); const init = () => { mockedComponent.setState({ count: 0 }); return waitForIt(() => mockedComponent.state("count")); }; const increment = () => { mockedComponent.find(".inc").simulate("click"); mockedComponent.find(".inc").simulate("click"); return waitForIt(() => mockedComponent.state("count")); }; const decrement = () => { mockedComponent.find(".dec").simulate("click"); return waitForIt(() => mockedComponent.state("count")); }; const reset = () => { mockedComponent.find(".reset").simulate("click"); return waitForIt(() => mockedComponent.state("count")); }; const firstValue = await init(); const secondValue = await increment(); const thirdValue = await decrement(); const fourthValue = await reset(); assert(firstValue === 0 && secondValue === 2 && thirdValue === 1 && fourthValue === 0, "Clicking the reset button should reset the count to 0."); }; ' ```
## Challenge Seed
```jsx class Counter extends React.Component { constructor(props) { super(props); this.state = { count: 0 }; // change code below this line // change code above this line } // change code below this line // change code above this line render() { return (

Current Count: {this.state.count}

); } }; ```
### After Test
```js console.info('after the test'); ```
## Solution
```js // solution required ```