Test-first implementation

Verified test failures

Minimal implementation

Refactoring evidence

Red-green cycle discipline

Test structure follows AAA

One Act per test

Single behavior per test

Descriptive test names

Bug reproduction test

Behavior-focused tests

Descriptive test naming

One assertion per test

Specific assertions used

Edge case coverage

Clear test structure

Isolated test cases

Bug fix verification

Constructor dependency injection

External dependencies mocked

Interface-based design

Test data visibility

Independent test execution

Mock verification

Error scenario testing

Clear test boundaries

Deterministic test data

No arbitrary sleeps

Proper async assertions

Deterministic timing

AAA structure in async

Isolated async tests

Error case handling

Stable test execution

Mock async dependencies

Clear async test names

Single behavior per test

No behavior combination

Visible test data

Independent test cases

Logical test organization

Clear workflow step tests

Error scenario isolation

Descriptive test structure

Clean test setup