Topic
Replacing collaborators in tests and evaluating the effect on coupling and regression coverage.
4 pages
Writing
Boundary testing questions concern evidence, isolation, failures, and release confidence. Compare the practice with mocks, TDD, generated checks, formal models, and production observation.
Writing
A Test Mediator and transport spy control delivery and expose observations while production gateways run. Capture email content, script retries, and measure bounded response reads.
Writing
Create instances for state or polymorphism and use inheritance for a common consumer. Static behavior and composition can keep testing from dictating every class's shape.
Writing
Test whole features through the public surface so regression tests survive later design changes. Class mocks bind tests to internals; transport doubles cover rare external failures.