Test có giá trị, dữ liệu cô lập và tái hiện lỗi

Nội dung luyện tập

• assert observable required result
• test inclusive business boundary
• make test preconditions explicit
• choose test scope for external dependency
• await eventual ui condition
• select user facing element contract
• wait for condition not arbitrary delay
• scope claims of network mocked tests
• isolate server state in ui tests
• clean up only test owned resources
• combine order and preservation properties
• interpret mutation survival
• control timer execution in tests
• retain reproducible generated failure
• test relational semantics with real provider
• treat retries as evidence not repair
• allocate tests to critical risk boundaries
• scale tests with owned external state
• evaluate test strength beyond line coverage
• make concurrency test hit critical interleaving

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