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---
id: 587d824d367417b2b2512c53
title: Test if a String Contains a Substring
challengeType: 2
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forumTopicId: 301597
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---
## Description
< section id = 'description' >
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As a reminder, this project is being built upon the following starter project on < a href = 'https://glitch.com/edit/#!/remix/clone-from-repo?REPO_URL=https://github.com/freeCodeCamp/boilerplate-mochachai/' > Glitch< / a > , or cloned from < a href = 'https://github.com/freeCodeCamp/boilerplate-mochachai/' > GitHub< / a > .
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< code > include()< / code > and < code > notInclude()< / code > work for strings too!
< code > include()< / code > asserts that the actual string contains the expected substring.
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< / section >
## Instructions
< section id = 'instructions' >
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Use < code > assert.include()< / code > or < code > assert.notInclude()< / code > to make the tests pass.
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< / section >
## Tests
< section id = 'tests' >
```yml
tests:
- text: All tests should pass
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testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit& n=13').then(data => { assert.equal(data.state,'passed'); }, xhr => { throw new Error(xhr.responseText); })
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- text: Choose the right assertion - include vs. notInclude
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testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit& n=13').then(data => { assert.equal(data.assertions[0].method, 'include', '\'Arrow\' contains \'row\'...'); }, xhr => { throw new Error(xhr.responseText); })
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- text: Choose the right assertion - include vs. notInclude
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testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit& n=13').then(data => { assert.equal(data.assertions[1].method, 'notInclude', '... a \'dart\' doesn\'t contain a \'queue\''); }, xhr => { throw new Error(xhr.responseText); })
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```
< / section >
## Challenge Seed
< section id = 'challengeSeed' >
< / section >
## Solution
< 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 >