rust / beginner
Snippet
Writing Your First Unit Test
The #[test] attribute marks a function as a test. assert_eq! checks that two values are equal. Tests run with cargo test and verify your code works correctly.
snippet.rs
rust
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fn add(a: i32, b: i32) -> i32 {a + b}#[test]fn test_add_positive() {assert_eq!(add(2, 3), 5);}#[test]fn test_add_negative() {assert_eq!(add(-1, -1), -2);}fn main() {println!("Testing add function");}
Breakdown
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#[test]
Marks this function as a test to be run
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assert_eq!(add(2, 3), 5);
Asserts that add(2, 3) equals 5
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cargo test
Command to run all tests in the project