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Testing SCSS Modules Component Rendering in Create-React-App

This test suite validates the integration and functionality of SCSS modules within Create React App’s kitchen sink test fixtures. It ensures proper compilation and rendering of components using SCSS module imports in a React environment.

Test Coverage Overview

The test coverage focuses on the basic rendering capabilities of components using SCSS modules.

Validates component mounting with SCSS module imports
Tests basic render functionality without crashing
Verifies SCSS module compilation integration

Implementation Analysis

The testing approach utilizes Jest’s describe/it pattern for component rendering verification. It implements a straightforward mount test using ReactDOM.render() to ensure SCSS module inclusion doesn’t break component rendering.

Uses ReactDOM.render for component mounting
Employs document.createElement for test container creation
Implements isolated component testing

Technical Details

Testing Framework: Jest
React Test Utilities: ReactDOM
Test Environment: jsdom
Component Type: React Function Component
Style Processing: SCSS Modules

Best Practices Demonstrated

The test demonstrates clean and efficient testing practices for style module integration.

Isolated component testing
Proper DOM cleanup
Single responsibility principle
Clear test case organization
Minimal test setup complexity

facebook/create-react-app

packages/react-scripts/fixtures/kitchensink/template/src/features/webpack/ScssModulesInclusion.test.js

            
/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import React from 'react';
import ReactDOM from 'react-dom';
import ScssModulesInclusion from './ScssModulesInclusion';

describe('scss modules inclusion', () => {
  it('renders without crashing', () => {
    const div = document.createElement('div');
    ReactDOM.render(<ScssModulesInclusion />, div);
  });
});