How to Write Integration Tests for Rust Web APIs

Testing

2026-04-17T12:05:42+00:00

Create a tests directory at the crate root and write #[test] functions that import your library to verify end-to-end behavior.

Write integration tests by placing test files in a tests directory at the crate root, where each file is a separate crate that imports your library and uses #[test] functions to verify behavior.

// tests/integration_test.rs
use your_crate_name::*;

#[test]
fn test_api_endpoint() {
    // Setup: Create mock data or server
    let result = your_function();
    // Assert: Verify the outcome
    assert_eq!(result, expected_value);
}