Back to Basics: Unit Tests
summary
Walks an existing C++ program from zero tests to a small suite that proves the scanner returns a no_more token on empty input, using istringstream for input and dependency injection to avoid std::cin. Tests start as a simple custom main, then move to Google Test (expect_eq, test suites, filtering), show how to falsify a test to ensure it fails, and outline next steps: multi-token tests, Google Mock for isolating the parser, and external code‑coverage tools.
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chapters (8)
- 0:00Introduction to unit testing
- 3:00Why start with unit tests
- 16:06Writing first scanner test
- 23:37Falsifying and verifying tests
- 36:28Adding a testing framework
- 49:05Advanced test features
- 57:36Good test properties
- 1:01:10Q&A and closing
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