Rust
Rust has a feature that no other mainstream language matches: every code example in your documentation is compiled and run as a test by default. There is no special setup, no framework to install, no annotation to add. Write a /// ``` rust block in your doc comment, and cargo test runs
Rust
Wasmtime is a fast, standards-compliant WebAssembly runtime from the Bytecode Alliance. Its Rust crate lets you load, instantiate, and call WASM modules from a Rust host — making it ideal for host-side unit tests that verify WASM module behavior, test WASI system calls in a controlled sandbox, and validate component model
Rust
wasm-pack is the standard toolchain for building and testing Rust code compiled to WebAssembly. Its wasm-pack test command runs your Rust tests inside a real browser (headless Chrome, Firefox, or Safari) or under Node.js, giving you confidence that your WASM module behaves correctly in the environments where it will
WebAssembly
The WebAssembly Component Model is a standard for composing WASM modules with typed interfaces defined in WIT (WebAssembly Interface Types). It replaces ad-hoc ABI conventions with a formal type system — records, variants, options, results — and generates host and guest bindings automatically via wit-bindgen. Testing components means verifying these interfaces: that
Rust
Tokio is Rust's most popular async runtime. Testing async Rust code requires a Tokio runtime to drive futures to completion. Tokio provides #[tokio::test] for exactly that. The Basics: #[tokio::test] Add tokio with the test feature to Cargo.toml: [dev-dependencies] tokio = { version = "1", features = ["
Fuzz Testing
Rust's memory safety guarantees eliminate an entire class of bugs that make fuzzing critical in C/C++ — but Rust code can still have logic errors, integer overflows, panics, and unexpected behavior. cargo-fuzz brings libFuzzer to Rust with a clean command-line interface, and the arbitrary crate enables structured fuzzing
Testing
Tauri is a framework for building lightweight desktop applications using web technologies for the frontend and Rust for the backend. Unlike Electron, which bundles Chromium, Tauri uses the OS's native WebView — resulting in apps that are typically 10-100x smaller. Testing a Tauri app means testing two distinct layers:
Rust
Standard Rust tests don't support parameterized test cases or reusable fixtures out of the box. The rstest crate fills that gap with #[case], #[fixture], #[values], and matrix test generation — all integrating cleanly with cargo test. Installation [dev-dependencies] rstest = "0.23" Copy #[case]: Parameterized Test Cases Without
Rust
Example-based tests check specific cases you've thought of. Property-based tests let the framework generate hundreds of random inputs and find cases you haven't thought of. For Rust, the proptest crate brings property-based testing with automatic failure shrinking into the standard cargo test workflow. What Is Property-Based
Rust
Rust's built-in #[bench] attribute requires nightly and lacks statistical rigor. Criterion.rs is the de facto standard for benchmarking on stable Rust: it handles warm-up, measures statistical variance, compares runs against baselines, and produces HTML reports. Installation [dev-dependencies] criterion = { version = "0.5", features = ["html_reports&
Rust
cargo-nextest is a next-generation test runner for Rust that replaces cargo test with a process-per-test execution model, better terminal output, built-in retry logic, and significantly faster CI runs. It's a drop-in replacement — your existing tests work unchanged. Why nextest? cargo test runs tests in threads within a single
Rust
Rust ships with a built-in test framework. No extra dependencies, no configuration files — just annotate a function with #[test] and run cargo test. That simplicity is deceptive: the Rust test model covers unit tests, integration tests, doc tests, and benchmarks within a single coherent workflow. This guide covers everything you