src/Cheeper src/App src/Cheeper/Chapter2/Spaghetti src/Cheeper/Chapter4/Infrastructure src/Cheeper/Chapter5/Infrastructure src/Cheeper/Chapter6/Infrastructure src/Cheeper/Chapter7/Infrastructure tests/Cheeper/Tests/Chapter2 tests/Cheeper/Tests/Chapter4 tests/Cheeper/Tests/Chapter5 tests/Cheeper/Tests/Chapter6 tests/Cheeper/Tests/Chapter7