3.0 KiB
3.0 KiB
| id | title | challengeType | isRequired | videoUrl | localeTitle |
|---|---|---|---|---|---|
| 5a24c314108439a4d4036178 | Create a Controlled Input | 6 | false |
Description
undefined
Instructions
undefined
Tests
tests:
- text: يجب أن يعرض <code>ControlledInput</code> عنصر <code>div</code> يحتوي على <code>input</code> وعلامة <code>p</code> .
testString: 'assert(Enzyme.mount(React.createElement(ControlledInput)).find("div").children().find("input").length === 1 && Enzyme.mount(React.createElement(ControlledInput)).find("div").children().find("p").length === 1, "<code>ControlledInput</code> should return a <code>div</code> element which contains an <code>input</code> and a <code>p</code> tag.");'
- text: يجب تهيئة حالة <code>ControlledInput</code> مع خاصية <code>input</code> لتعيين سلسلة فارغة.
testString: 'assert.strictEqual(Enzyme.mount(React.createElement(ControlledInput)).state("input"), "", "The state of <code>ControlledInput</code> should initialize with an <code>input</code> property set to an empty string.");'
- text: يجب أن تؤدي الكتابة في عنصر الإدخال إلى تحديث الحالة وقيمة الإدخال ، ويجب أن يعرض العنصر <code>p</code> هذه الحالة أثناء الكتابة.
testString: 'async () => { const waitForIt = (fn) => new Promise((resolve, reject) => setTimeout(() => resolve(fn()), 250)); const mockedComponent = Enzyme.mount(React.createElement(ControlledInput)); const _1 = () => { mockedComponent.setState({ input: "" }); return waitForIt(() => mockedComponent.state("input"))}; const _2 = () => { mockedComponent.find("input").simulate("change", { target: { value: "TestInput" }}); return waitForIt(() => ({ state: mockedComponent.state("input"), text: mockedComponent.find("p").text(), inputVal: mockedComponent.find("input").props().value }))}; const before = await _1(); const after = await _2(); assert(before === "" && after.state === "TestInput" && after.text === "TestInput" && after.inputVal === "TestInput", "Typing in the input element should update the state and the value of the input, and the <code>p</code> element should render this state as you type."); }; '
Challenge Seed
class ControlledInput extends React.Component {
constructor(props) {
super(props);
this.state = {
input: "
};
// change code below this line
// change code above this line
}
// change code below this line
// change code above this line
render() {
return (
<div>
{ /* change code below this line */}
{ /* change code above this line */}
<h4>Controlled Input:</h4>
<p>{this.state.input}</p>
</div>
);
}
};
After Test
console.info('after the test');
Solution
// solution required