{"id":"tests-colocated-with-solutions","text":"Test suites live alongside solutions — either embedded in the same `solution.py` file (with a `unittest` class) or in a sibling `test_solution.py`, making each problem directory independently testable.","truth_value":"IN","source":"entries/2026/06/06/binary-tree-inorder-traversal-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"tests-colocated-with-solutions","truth_value":"IN","reason":"premise"}]}}