Jun 9, 2026 Half Your Cucumber Scenarios Are Skipped. Here's Why That Status Is Lying to You. Cucumber's 'skipped' status hides three completely different problems. Here's how to diagnose which one is eating your test suite, and how to stop it. deep-divescucumberbddtest-maintenance
Jun 8, 2026 Your Gherkin specs are lying to you Gherkin specs drift out of sync the moment you trust humans to update them manually. Here's how to automate the checks that keep feature files honest. deep-divesgherkinbddliving-documentation
Jun 7, 2026 Your Compiler Checks Syntax. Your Tests Should Check Architecture. Most teams document architecture rules in wikis. Here's how to write them as executable tests that fail CI when your dependency graph drifts. deep-divesarchitecture-testingclean-architectureci-cd
Jun 6, 2026 Your domain layer imports Postgres. Your CI doesn't care. Clean architecture diagrams look great on a whiteboard. deep-divesclean-architectureci-cddependency-rules
Jun 5, 2026 Your Architecture Diagram Is Already a Lie Architecture documentation rots the moment you save it. Here's how to keep docs honest using code-generated diagrams, ADRs, and automated architecture tests. deep-divesarchitecturedocumentationliving-docs
Jun 4, 2026 Your retry loop assumes the first request failed. It probably didn't. A timeout or crash does not mean your API request was lost. deep-divesidempotencyapi-designresilience
Jun 3, 2026 A lock that outlives your process: how distributed leases actually work In-memory mutexes vanish when your server restarts. Here's how distributed leases with fencing tokens and TTLs prevent duplicate work across crashes, and... deep-divesdistributed-locksleasingresilience
Jun 2, 2026 A circuit breaker with no goroutines, no timers, and no background overhead Most circuit breaker libraries spawn background threads to probe for recovery. You don't need them. deep-divescircuit-breakerperformanceresilience
Jun 1, 2026 Your Web Service Has a Graceful Shutdown Path. That's the Bug. Crash-only software treats every failure as a crash and every startup as a recovery. deep-divescrash-only-softwareresiliencedistributed-systems
May 31, 2026 How to Kill a Surviving Mutant When You Don't Understand What It Changed Mutation testing found a survivor and you have no idea what the mutation even does. deep-divesmutation-testingtest-writingdebugging
May 30, 2026 Auth code needs 90% mutation coverage. Your string utils don't. Why enforcing a single mutation score across your entire codebase is a mistake, and how to set per-module thresholds that match actual risk. deep-divesmutation-testingauthtest-quality
May 29, 2026 Your Tests Pass. Your Mutation Score Is 40%. Here's What Surviving Mutants Are Actually Telling You. Code coverage says you're safe. Mutation testing says your tests are mostly decoration. Here's how surviving mutants expose the gap, and how to close it. deep-divesmutation-testingsurviving-mutantstest-quality
May 28, 2026 Mutation Testing in Rust Works, but Your Compile Times Will Hate You cargo-mutants finds the tests that only pretend to verify your code. deep-divesmutation-testingrustcargo-mutantstest-quality
May 27, 2026 Mutation testing takes 4 hours. How do teams actually use it in CI? Most teams don't run full mutation testing suites on every commit. deep-divesmutation-testingci-cdtest-quality
May 26, 2026 Your unit tests pass, but your data still disappears Mocked database tests verify your SQL syntax, not whether rows survive crashes, concurrent writes, or schema mismatches. deep-divesdatabasetestingpersistence
May 25, 2026 Testing Redux without drowning in mock actions Mocking every Redux action turns your tests into a changelog validator. Here's how to test your store with real state transitions instead. deep-divesreduxtestingstate-management
May 24, 2026 100 Test Runs Is a Lie: How to Actually Size Your Property-Based Tests The default 100 examples in property-based testing is a social compromise, not a statistical strategy. deep-divesproperty-based-testingtest-coverageshrinking
May 23, 2026 Property-Based Tests in Rust Find the Bugs Your Unit Tests Miss Example-based testing only covers the inputs you thought of. deep-divesrustproperty-based-testingquickcheckproptest
May 22, 2026 Your Unit Tests Pass. Your Production Code Is Still Broken. Code coverage metrics create a false sense of security. Here's why unit tests miss the bugs that actually cost you sleep, and what to test instead. deep-divesunit-testingtest-qualitybug-prevention
May 21, 2026 Rust Runtime Contracts Can Be Free in Release Builds, but the Compiler Won't Do It for You Rust strips debug assertions automatically, but real design-by-contract needs more than debug_assert!. deep-divesrustruntime-contractsperformance
May 20, 2026 Zero, One, or Twelve: How Many Assertions a Production Function Actually Needs Developers either scatter assertions like confetti or avoid them entirely. deep-divesassertionsproduction-codedefensive-programming
May 19, 2026 Your validation layer is bigger than your business logic Manual validation bloats your codebase and still misses edge cases. Here's how to enforce runtime contracts with declarative schemas that stay out of your way. deep-divesruntime-contractsvalidationdesign-by-contract
May 18, 2026 TypeScript strictNullChecks Is a Compile-Time Guard, Not a Runtime Shield strict mode catches the nulls you write, not the nulls that arrive at runtime from APIs, DOM queries, and JSON.parse. deep-divestypescriptnull-safetystrict-mode
