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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Test if an Array Contains an Item

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

Solution 1 (Click to Show/Hide)

/** 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 !!');
});