2018-10-10 22:03:03 +00:00
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---
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id: 587d824b367417b2b2512c49
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2020-12-16 07:37:30 +00:00
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title: 测试真实性
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2018-10-10 22:03:03 +00:00
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challengeType: 2
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2020-08-15 23:13:26 +00:00
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videoUrl: ''
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2018-10-10 22:03:03 +00:00
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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请注意,本项目在 [这个 Repl.it 项目](https://repl.it/github/freeCodeCamp/boilerplate-mochachai) 的基础上进行开发。你也可以从 [GitHub](https://repl.it/github/freeCodeCamp/boilerplate-mochachai) 上克隆。
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2020-09-17 10:50:23 +00:00
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2020-12-16 07:37:30 +00:00
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`isTrue()` 仅当给出的值为 Boolean 的 `true` 时可以通过测试;`isNotTrue()` 则会在给出除 `true` 以外的值时通过测试。
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2020-09-17 10:50:23 +00:00
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```js
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assert.isTrue(true, '可以通过,因为值的类型是布尔且值为 true');
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assert.isTrue('true', '不能通过,因为值的类型是字符串);
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assert.isTrue(1, '不过能通过,因为值是数字 1');
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```
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2020-12-16 07:37:30 +00:00
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`isFalse()` 和 `isNotFalse()` 同样存在,表现与上面提到的两个方法类似。
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2020-09-17 10:50:23 +00:00
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2020-12-16 07:37:30 +00:00
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# --instructions--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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使用 `assert.isTrue()` 或 `assert.isNotTrue()` 让测试通过。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --hints--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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不应有未通过的测试
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
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(data) => {
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assert.equal(data.state, 'passed');
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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2018-10-10 22:03:03 +00:00
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```
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2020-12-16 07:37:30 +00:00
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请选择正确的断言—isTrue 或 isNotTrue
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
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(data) => {
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assert.equal(data.assertions[0].method, 'isTrue', 'True is true');
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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请选择正确的断言—isTrue 或 isNotTrue
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
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(data) => {
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assert.equal(
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data.assertions[1].method,
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'isTrue',
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'Double negation of a truthy value is true'
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);
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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请选择正确的断言—isTrue 或 isNotTrue
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
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(data) => {
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assert.equal(
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data.assertions[2].method,
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'isNotTrue',
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'A truthy object is not true - neither is a false one'
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);
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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2018-10-10 22:03:03 +00:00
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```
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2020-08-13 15:24:35 +00:00
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2020-12-16 07:37:30 +00:00
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# --solutions--
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