intermediateTesting
Unit Tests
Write unit tests with #[test] attribute.
Unit Tests
Write unit tests with #[test] attribute.
Difficulty
Intermediate
Code
rust
fn add(a: i32, b: i32) -> i32 {
a + b
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_add() {
assert_eq!(add(2, 3), 5);
}
#[test]
fn test_add_negative() {
assert_eq!(add(-1, 1), 0);
}
#[test]
#[should_panic]
fn test_panic() {
panic!("expected panic");
}
}
fn main() {
println!("Run with: cargo test");
}Explanation
Tests use #[test] attribute. Run with cargo test.
Key Concepts
- Read the code carefully and understand the data flow
- Try modifying the example to see how it changes behavior
- Run this code in the Rust Playground
Related Topics
Browse more examples in the testing category to build a complete understanding of this topic.