Testing Strategies

Learning Objectives

• Build tests for normal, boundary, and invalid inputs.
• Convert bug fixes into permanent regression tests.
• Improve confidence before release/submission.

Test Pyramid (Practical View)

• Unit tests: fast and focused.
• Integration tests: module interaction.
• End-to-end tests: workflow validation.

Essential Test Set

• Happy path examples.
• Boundary values (0, 1, max/min).
• Invalid/empty input behavior.
• Error-handling paths.

Practice Tasks

1. Write 5 tests for one utility function.
2. Add one regression test from a real bug.
3. Record expected output for every test.

Summary

Small, frequent, and targeted tests are the most effective.