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---
id: 587d824d367417b2b2512c53
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title: Test if a String Contains a Substring
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challengeType: 2
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forumTopicId: 301597
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dashedName: test-if-a-string-contains-a-substring
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---
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# --description--
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As a reminder, this project is being built upon the following starter project on [Repl.it ](https://repl.it/github/freeCodeCamp/boilerplate-mochachai ), or cloned from [GitHub ](https://github.com/freeCodeCamp/boilerplate-mochachai/ ).
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`include()` and `notInclude()` work for strings too! `include()` asserts that the actual string contains the expected substring.
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# --instructions--
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Within `tests/1_unit-tests.js` under the test labelled `#14` in the `Strings` suite, change each `assert` to either `assert.include` or `assert.notInclude` to make the test pass (should evaluate to `true` ). Do not alter the arguments passed to the asserts.
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# --hints--
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All tests should pass.
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```js
(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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You should choose the correct method for the first assertion - `include` vs. `notInclude` .
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```js
(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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You should choose the correct method for the second assertion - `include` vs. `notInclude` .
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```js
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(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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```
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# --solutions--
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```js
/**
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.
*/
```