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generate-tests.md

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Generate Tests

Generate comprehensive tests for specified code.

Instructions

  1. Read the target file(s)
  2. Identify testable units (functions, classes, methods)
  3. Generate tests following project conventions
  4. Ensure high coverage of edge cases

Test Generation Process

1. Analyze Target

  • Identify public interfaces
  • Understand dependencies
  • Note edge cases and boundaries

2. Detect Test Framework

Check for:

  • jest.config.js → Jest
  • vitest.config.ts → Vitest
  • pytest.ini → pytest
  • mocha in package.json → Mocha

3. Generate Tests

Follow the detected framework conventions.

Test Categories

Happy Path

Normal expected behavior with valid input.

Edge Cases

  • Empty inputs
  • Null/undefined values
  • Boundary values (0, -1, MAX_INT)
  • Single item vs multiple items

Error Cases

  • Invalid input types
  • Missing required parameters
  • Network/IO failures
  • Timeout scenarios

Integration Points

  • Database interactions
  • External API calls
  • File system operations

Output Format

describe('[ComponentName]', () => {
  describe('[methodName]', () => {
    // Happy path
    it('should [expected behavior] when [condition]', () => {
      // Arrange
      // Act
      // Assert
    });

    // Edge cases
    it('should handle empty input', () => {});
    it('should handle null values', () => {});

    // Error cases
    it('should throw when [invalid condition]', () => {});
  });
});

Conventions

  • One assertion per test (when practical)
  • Descriptive test names
  • AAA pattern (Arrange-Act-Assert)
  • No test interdependence
  • Mock external dependencies

Usage

/generate-tests src/utils/calculator.ts
/generate-tests src/services/

$ARGUMENTS