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Automated Testing (Unit and Integration)

Unit Testing

Frameworks

  • Go: The Go programming language provides a built-in testing framework.
  • xUnit: A popular framework that supports a wide range of languages, including Python, Java, C++, and more.

Examples

Go

package main
          
          import "testing"
          
          func TestAdd(t *testing.T) {
            result := add(2, 3)
            if result != 5 {
              t.Errorf("Expected 5, got %d", result)
            }
          }

xUnit (Python)

import unittest
          
          class TestAdd(unittest.TestCase):
            def test_add(self):
              self.assertEqual(add(2, 3), 5)

Best Practices

  • Isolate tests: Each test should focus on a single unit of code.
  • Use assertions: Assertions help to verify the expected behavior of the code.
  • Keep tests concise: Short, focused tests are easier to understand and maintain.
  • Cover all code paths: Aim for a high test coverage to ensure all functionality is tested.

Integration Testing

Frameworks

  • Go: Similar to unit testing, the Go standard library provides support for integration testing.
  • Selenium: A popular framework for testing web applications.

Examples

Go

package main
          
          import (
            "testing"
            "net/http"
          )
          
          func TestServer(t *testing.T) {
            server := createServer()
            defer server.Close()
            
            resp, err := http.Get("http://localhost:8080")
            if err != nil {
              t.Fatal(err)
            }
            
            if resp.StatusCode != http.StatusOK {
              t.Errorf("Expected status code 200, got %d", resp.StatusCode)
            }
          }

Best Practices

  • Test interactions between components: Integration tests verify how different parts of the system work together.
  • Use mock objects: Mock objects can simulate dependencies to simplify integration tests.
  • Focus on realistic scenarios: Tests should reflect how the application is expected to be used.
  • Use a test environment: A dedicated testing environment helps to isolate tests from the production environment.

Resources