How to mock modules in storybook stories?

Member

by deron , in category: Javascript , 9 months ago

How to mock modules in storybook stories?

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1 answer

Member

by kadin , 9 months ago

@deron 

To mock modules in Storybook stories, you can use a function called jest.mock() from Jest, the testing library that Storybook uses. Here's a step-by-step guide on how to do it:

  1. Identify the module you want to mock in your Storybook story. Let's say you want to mock a module named exampleModule.
  2. In your Storybook story file, import the module that you want to mock at the top of the file. For example:
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import exampleModule from 'exampleModule';


  1. Below the imports in your story file, use the jest.mock() function to mock the module. Make sure to provide a mock implementation for the module. Here's an example mock implementation:
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jest.mock('exampleModule', () => ({
  __esModule: true,
  default: jest.fn(() => 'Mocked implementation'),
}));


  1. Now, you can use the mocked module in your Storybook story like you would normally use it. For example:
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import React from 'react';
import { MyComponent } from './MyComponent';

export default {
  title: 'MyComponent',
  component: MyComponent,
};

export const Default = () => <MyComponent />;


By following these steps, you can mock modules in your Storybook stories using Jest's jest.mock() function. This allows you to control the behavior of the mocked modules and test different scenarios in Storybook.