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Testing Bootstrap-Sass Build Integration in Create-React-App

This test suite validates the build process for a React application using Bootstrap with Sass integration. It focuses on verifying successful builds in both development and production environments, implementing essential smoke tests for the build pipeline.

Test Coverage Overview

The test coverage focuses on critical build scenarios for Bootstrap-Sass integration in Create React App.

Development build verification through smoke testing
Production build validation
Conditional test execution based on environment
Build fulfillment status checks

Implementation Analysis

The testing approach utilizes Jest’s async/await pattern for handling build processes asynchronously. The implementation leverages shared test setup utilities and employs environment-aware conditional testing, demonstrating modern JavaScript testing patterns.

Async test execution with Jest
Shared test setup configuration
Environment-specific test handling

Technical Details

Jest testing framework
Custom test setup utilities
Environment detection logic
Build script execution helpers
Assertion patterns for build status

Best Practices Demonstrated

The test suite exemplifies several testing best practices for build process validation.

Environment-aware test execution
Modular test setup
Smoke test implementation
Clear build status verification
Separation of development and production concerns

facebook/create-react-app

test/fixtures/boostrap-sass/index.test.js

            
'use strict';

const testSetup = require('../__shared__/test-setup');

if (testSetup.isLocal) {
  // TODO: make this work locally
  test('skipped locally', () => {});
} else {
  test('builds in development', async () => {
    const { fulfilled } = await testSetup.scripts.start({ smoke: true });
    expect(fulfilled).toBe(true);
  });

  test('builds in production', async () => {
    const { fulfilled } = await testSetup.scripts.build();
    expect(fulfilled).toBe(true);
  });
}