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---
id: 587d824b367417b2b2512c48
title: Use Assert.isOK and Assert.isNotOK
challengeType: 2
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forumTopicId: 301607
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---
## Description
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< section id = 'description' >
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As a reminder, this project is being built upon the following starter project on < a href = "https://repl.it/github/freeCodeCamp/boilerplate-mochachai" > Repl.it< / a > , or cloned from < a href = 'https://github.com/freeCodeCamp/boilerplate-mochachai/' > GitHub< / a > .
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`isOk()` will test for a truthy value, and `isNotOk()` will test for a falsy value.
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To learn more about truthy and falsy values, try our < a href = "https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/basic-algorithm-scripting/falsy-bouncer" target = "_blank" > Falsy Bouncer< / a > challenge.
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< / section >
## Instructions
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< section id = 'instructions' >
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Within `tests/1_unit-tests.js` under the test labelled `#3` in the `Basic Assertions` suite, change each `assert` to either `assert.isOk()` or `assert.isNotOk()` to make the test pass (should evaluate to `true` ). Do not alter the arguments passed to the asserts.
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< / section >
## Tests
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< section id = 'tests' >
```yml
tests:
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- text: All tests should pass.
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testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit& n=2').then(data => {assert.equal(data.state,'passed'); }, xhr => { throw new Error(xhr.responseText); })
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- text: You should choose the correct method for the first assertion - `isOk` vs. `isNotOk` .
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testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit& n=2').then(data => { assert.equal(data.assertions[0].method, 'isNotOk', 'Null is falsy'); }, xhr => { throw new Error(xhr.responseText); })
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- text: You should choose the correct method for the second assertion - `isOk` vs. `isNotOk` .
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testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit& n=2').then(data => { assert.equal(data.assertions[1].method, 'isOk','A string is truthy'); }, xhr => { throw new Error(xhr.responseText); })
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- text: You should choose the correct method for the third assertion - `isOk` vs. `isNotOk` .
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testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit& n=2').then(data => { assert.equal(data.assertions[2].method, 'isOk', 'true is truthy'); }, xhr => { throw new Error(xhr.responseText); })
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```
< / section >
## Challenge Seed
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< section id = 'challengeSeed' >
< / section >
## Solution
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< section id = 'solution' >
```js
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/**
Backend challenges don't need solutions,
because they would need to be tested against a full working project.
Please check our contributing guidelines to learn more.
*/
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```
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< / section >