freeCodeCamp/guide/english/certifications/information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-array-contains-an-item/index.md

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title: Test if an Array Contains an Item
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# Test if an Array Contains an Item

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## Problem Explanation
To begin, locate the file "tests/1_unit_tests.js" and scroll to the suite of tests for 'Arrays'.

This file contains multiple suites of tests for the project, and this challenge requires you to make the tests in ``` /** 12 */``` pass.


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## Hints

### Hint 1

The assertions are checking against variables defined before the 'Arrays' suite of tests, check carefully whether the array includes the value being asserted.

### Hint 2

The lines in the test should be changed from `assert.fail()` to either `assert.include()` or `assert.notInclude()`.

### Hint 3

`assert.include()` and `assert.notInclude()` parameters take the form (haystack, needle, message) where the needle is what you are searching for in the haystack. The message provides feedback where there is an error.


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## Solutions

<details><summary>Solution 1 (Click to Show/Hide)</summary>

```js
/** 12 - #include vs #notInclude **/
test('Array #include, #notInclude', function() {
  assert.notInclude(winterMonths, 'jul', "It's summer in july...");
  assert.include(backendLanguages, 'javascript', 'JS is a backend language !!');
});
```
</details>