Testing
Testing Rate Limiters and Quotas in Rust Web Services
A limiter is a function of time, so tests should control time. Assert the boundaries: the last allowed request, the first rejected one and the moment capacity returns.
4 min read
Library
Everything you need to level up your coding skills.
Testing
Testing Concurrent Rust Code With Loom Interleavings
Stress tests find concurrency bugs by luck. Loom explores every legal ordering of your threads and memory operations, so a missing Acquire fails deterministically.
3 min read
TestingGuide
Continuous Integration for Rust Test Format Lint Build
A good Rust pipeline runs the same few checks in the same order every time. Format, clippy, tests, docs and a cache cover most projects in about forty lines of YAML.
14 min read
Testing
Testing Retry and Timeout Logic in Rust Without Sleeping
Retry and timeout code is full of delays, and sleeping in tests makes them slow and flaky. Use Tokio paused time, a scripted flaky dependency and an injected backoff to test every path in milliseconds.
4 min read
Testing
Testing Graceful Shutdown and Signal Handling in Rust Apps
Make shutdown testable by taking a shutdown future instead of listening for signals inside the server. Assert that in-flight requests finish, new ones are refused and the process exits within a deadline.
4 min read
Databases
Per Test Databases in Rust With SQLx Test Attribute
The sqlx::test attribute creates a fresh database for each test, runs your migrations, hands you a pool and drops it afterwards. Learn fixtures, the DATABASE_URL requirement, parallelism and common errors.
3 min read
Databases
Testing Database Code in Rust With Test Containers
Run tests against a real PostgreSQL in a disposable container with the testcontainers crate. Start one per test run, migrate, isolate tests with transactions or databases, and keep CI fast with reuse.
4 min read
Systems
Testing Embedded Rust on the Host With Mocks and Simulators
Keep logic in a no_std library, put hardware behind embedded-hal traits, and run the library tests on your computer. Use fakes for pins and buses, and reserve on-device tests for what only hardware can show.
4 min read
Semver Checks for Libraries With Cargo Semver Checks
cargo-semver-checks compares your public API with the last release and fails when a change needs a higher version number. Install it, run it in CI and learn what it catches and what it cannot.
6 min read
Testing
Ignoring and Filtering Tests in Rust for Slow Suites
Skip slow or environment-dependent tests with #[ignore], run them on demand with --ignored, select by name with filters and --skip, and keep ignored tests from rotting.
3 min read
ArchitectureGuide
Refactoring With the Compiler in Rust Safely and Fast
Change a type or signature and let rustc list every place that must change. A method for safe large refactors: make the change, follow errors, keep tests green at each step.
16 min read
SecurityGuide
Fuzzing for Security Bugs in Rust Parsers Step by Step
Fuzz a Rust parser for security bugs: panics, hangs, huge allocations and unsafe memory errors. Set up targets with limits, run with sanitizers and triage crashes.
16 min read
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