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Testing SCSS Module Integration in Create-React-App Components

This test suite validates SCSS module inclusion and rendering functionality in Create React App. It ensures that components using SCSS stylesheets can be properly rendered without causing application crashes or styling issues.

Test Coverage Overview

The test coverage focuses on basic SCSS inclusion and component rendering functionality.

Validates successful component mounting with SCSS styles
Tests basic React component rendering with SCSS modules
Verifies DOM integration with styled components

Implementation Analysis

The testing approach employs Jest’s describe/it blocks for organizing test cases. The implementation uses ReactDOM.render() to validate component mounting, with DOM manipulation for test environment setup.

Uses React Testing Library patterns
Implements DOM-based rendering validation
Employs component isolation testing

Technical Details

Testing Framework: Jest
React DOM Testing utilities
SCSS module support configuration
Document createElement() for test container

Best Practices Demonstrated

The test suite demonstrates clean and efficient testing practices for React components with SCSS modules.

Isolated component testing
Proper test environment cleanup
Clear test case organization
Minimal test setup complexity

facebook/create-react-app

packages/react-scripts/fixtures/kitchensink/template/src/features/webpack/ScssInclusion.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 ScssInclusion from './ScssInclusion';

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