unit-testing

name	unit-testing
description	Creates and runs unit tests for individual functions and modules. Use when writing or running unit tests.

Unit Testing

Focuses on testing individual units of code in isolation.

Instructions

When creating unit tests:

1. Identify test cases

   • Normal inputs and expected outputs
   • Edge cases (empty, null, boundary values)
   • Error conditions

2. Write test structure

   #[test]
   fn test_function_name_scenario() {
       // Arrange
       let input = ...;
       
       // Act
       let result = function(input);
       
       // Assert
       assert_eq!(result, expected);
   }
   

3. Best practices

   • One assertion per test when possible
   • Clear, descriptive test names
   • Test behavior, not implementation

Examples

Input: Create unit tests for add function Output: Tests covering positive numbers, negative numbers, zeros, and overflow cases.