Topics / Testing

Testing

Pyramid, contracts, property-based tests, doubles, and flakes you can defend in interviews.

Common tags: test-pyramid, contracts, property-based, flakes

• TestingOct 2026

  Load, Chaos & Production Validation — Shadow Traffic, Canaries & Game Days

  Cluster · Testing Strategies

  Load checks capacity and latency. Chaos checks graceful failure. Shadow traffic, canaries, synthetics, and game days sit above the pyramid, always with an SLO abort and a blast-radius limit.

  • testing
  • load
  • chaos
  • canary
  • game-day
  • interview
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• TestingSep 2026

  Testing Strategies — Pyramid, Contracts, Property-Based & Flakes

  Cluster · Testing Strategies

  Choose the cheapest test that would have caught the bug. Pyramid/Trophy allocate effort; contracts protect boundaries; property/fuzz find edge cases mocks miss; doubles need discipline; flakes destroy trust.

  • testing
  • test-pyramid
  • testing-trophy
  • contract-testing
  • pact
  • property-based-testing
  • fuzzing
  • test-doubles
  • mocks
  • flaky-tests
  • interview
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• TestingSep 2026

  Test Pyramid & Testing Trophy — Unit vs Integration vs E2E

  Cluster · Testing Strategies

  Unit = fast/narrow; integration = real collaborators; E2E = journeys but slow/flaky. Trophy shifts effort toward integration. Avoid ice-cream cone (mostly E2E).

  • testing
  • test-pyramid
  • testing-trophy
  • unit-tests
  • integration-tests
  • e2e
  • interview
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• TestingSep 2026

  Test Doubles — Mocks, Stubs, Fakes, Spies & When Not to Mock

  Cluster · Testing Strategies

  Mock/stub/fake/spy/dummy (Meszaros). Over-mocking couples tests to implementation; prefer fakes/testcontainers for domain logic.

  • testing
  • test-doubles
  • mocks
  • stubs
  • fakes
  • spies
  • interview
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• TestingSep 2026

  Property-Based & Fuzz Testing — Generators, Shrinking & Invariants

  Cluster · Testing Strategies

  Generators + invariants + shrinking find edge cases example tests miss. Hypothesis (Python) and fast-check (TS); fuzz parsers/protocols.

  • testing
  • property-based-testing
  • fuzzing
  • hypothesis
  • fast-check
  • interview
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• TestingSep 2026

  Flaky Tests — Isolation, Time, Concurrency & Quarantine

  Cluster · Testing Strategies

  Root causes: time, randomness, shared state, async races, order dependence, externals. Quarantine vs fix; retries hide bugs; freeze clocks and isolate state.

  • testing
  • flaky-tests
  • test-isolation
  • quarantine
  • determinism
  • interview
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• TestingSep 2026

  Contract Testing — Consumer-Driven Contracts vs Schema Contracts

  Cluster · Testing Strategies

  Consumer-driven (Pact) vs provider schema (OpenAPI/AsyncAPI/Protobuf) vs shared-env e2e. Contracts catch breaking API changes in CI without staging.

  • testing
  • contract-testing
  • pact
  • openapi
  • schema-contracts
  • interview
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