How to mock a glob call in node.js?
How to mock a glob call in node.js?
1 answer
by
lily ,
10 months ago
@giovanny.lueilwitz
You can mock a glob call in Node.js using a mocking library such as Jest. Here’s an example of how you can mock a glob call using Jest:
- Install Jest if you haven’t already:
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npm install jest --save-dev |
- Create a function that calls glob and exports it:
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// file.js
const glob = require('glob');
function getFiles() {
return glob.sync('path/to/files/*.txt');
}
module.exports = getFiles;
|
- Create a test file where you mock the glob call using Jest:
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// file.test.js
jest.mock('glob', () => ({
sync: jest.fn(() => ['file1.txt', 'file2.txt']),
}));
const getFiles = require('./file');
test('getFiles returns array of files', () => {
const files = getFiles();
expect(files).toEqual(['file1.txt', 'file2.txt']);
});
|
- Run the test using Jest:
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npm test |
This will mock the glob.sync method in your test file and return the files you specify, allowing you to test the behavior of your function without actually calling glob.