Karma is Angular’s default test runner that executes Jasmine tests in real browsers, providing accurate results for browser-specific behavior. With over 12 years of Angular development experience since 2014 and as the creator of CoreUI, I’ve configured Karma for countless testing environments. Karma launches browsers, runs tests, and reports results while watching files for changes during development. The configuration allows running tests in multiple browsers simultaneously and generating code coverage reports.

Jasmine is Angular’s default testing framework, providing a behavior-driven development syntax for writing clean, readable tests. As the creator of CoreUI with over 12 years of Angular experience since 2014, I’ve used Jasmine extensively for testing thousands of components and services. Jasmine offers describe blocks for test suites, it blocks for individual tests, and powerful matchers for assertions. The framework includes spies for mocking functions and tracking calls without external dependencies.

Form validation and submission logic are critical parts of Angular applications that must be thoroughly tested to prevent user frustration and data quality issues. As the creator of CoreUI with over 12 years of Angular experience since 2014, I’ve built and tested complex forms in countless enterprise applications. Testing Angular forms involves verifying that form controls validate correctly, error messages appear at the right time, and submission handlers work as expected. The approach differs slightly between reactive forms and template-driven forms but both ensure form behavior reliability.

Angular directives modify DOM behavior and appearance, making testing essential to ensure they work correctly across different scenarios and edge cases. With over 12 years of Angular development experience since 2014 and as the creator of CoreUI, I’ve tested numerous custom directives in production applications. Testing directives requires creating a test component that uses the directive, then asserting that the directive correctly modifies the DOM or behavior. This approach verifies both attribute directives that change element behavior and structural directives that modify the DOM structure.

Angular pipes transform display values in templates, and testing them ensures your data formatting logic works correctly with edge cases and unexpected inputs. As the creator of CoreUI with over 12 years of Angular experience since 2014, I’ve built and tested numerous custom pipes for enterprise applications. Testing pipes is straightforward because they’re pure functions that take input and return transformed output without side effects. The approach involves instantiating the pipe directly and calling its transform method with various test inputs.

Angular services contain critical business logic and data operations that must be thoroughly tested to prevent bugs in production applications. With over 12 years of Angular development experience since 2014 and as the creator of CoreUI, I’ve written comprehensive test suites for countless enterprise services. Testing services is simpler than testing components because services have no template or DOM to manage, focusing purely on logic and method outputs. The approach uses TestBed to inject the service and Jasmine to assert that methods behave correctly with various inputs.

Testing Angular components is essential for maintaining code quality and preventing regressions as your application grows and evolves. With over 12 years of Angular development experience since 2014 and as the creator of CoreUI, I’ve written thousands of component tests for production applications. Angular CLI automatically generates test files using TestBed for component creation and Jasmine for assertions. The testing approach involves creating a component instance, detecting changes, and asserting that the component renders and behaves correctly.