Testing
Also known as: software testing, test cases
Systematically running a program with known inputs to verify that its outputs are correct. Quality software requires thorough, systematic testing because bugs found early cost far less to fix.
💡 Intuition
Try to break it before users do. Test normal cases, edge cases, and error cases.
Core Idea
Testing can prove that bugs exist, but cannot prove that no bugs remain—exhaustive testing is impossible.
🔬 Example
🎯 Why It Matters
Quality software requires thorough, systematic testing because bugs found early cost far less to fix.
⚠️ Common Confusion
Test edge cases: empty input, zero, maximum values, unexpected types.
Related Concepts
How Testing Connects to Other Ideas
To understand testing, you should first be comfortable with algorithm and debugging.
Go Deeper
Frequently Asked Questions
What is Testing in CS Thinking?
Systematically running a program with known inputs to verify that its outputs are correct.
Why is Testing important?
Quality software requires thorough, systematic testing because bugs found early cost far less to fix.
What do students usually get wrong about Testing?
Test edge cases: empty input, zero, maximum values, unexpected types.
What should I learn before Testing?
Before studying Testing, you should understand: algorithm, debugging.