jest-fail-on-console

import failOnConsole from 'jest-fail-on-console'; // Basic usage: fail on console.error and console.warn failOnConsole(); // Or with options for more granular control: failOnConsole({ shouldFailOnWarn: false, // Don't fail on warnings shouldFailOnLog: true, // Do fail on console.log allowMessage: (message, methodName) => { // Allow specific messages to pass without failing tests if (methodName === 'error' && message.includes('Expected error message')) { return true; } return false; }, silenceMessage: (message) => { // Prevent specific messages from even showing up in the console if (message.includes('Ignore this log')) { return true; } return false; } }); // Example test file (e.g., my-component.test.ts) describe('My Component', () => { it('should not log errors or warnings', () => { // Simulate some logic that might accidentally log console.log('This is a log that might fail if shouldFailOnLog is true'); console.warn('This is a warning that will fail by default'); console.error('This is an error that will always fail by default'); // ... your actual test logic ... }); it('should handle expected errors gracefully', () => { // To test an expected console.error without failing the test const spy = jest.spyOn(console, 'error').mockImplementation(() => {}); console.error('Expected error message'); expect(spy).toHaveBeenCalledWith('Expected error message'); spy.mockRestore(); // Important to restore the spy after the test }); });