Function compute_test_files_hash

tests/test_metadata_cache.py:34–84

Compute a hash of all test file metadata (path + mtime + size). This provides a fast way to detect if any test files have been added, deleted, or modified without re-parsing all test files. Args: tests_dir: Root directory containing test files Returns: SHA256

(tests_dir: Path)

def compute_test_files_hash(tests_dir: Path) -> str:
    """
    Compute a hash of all test file metadata (path + mtime + size).

    This provides a fast way to detect if any test files have been added,
    deleted, or modified without re-parsing all test files.

    Args:
        tests_dir: Root directory containing test files

    Returns:
        SHA256 hash of all test file metadata
    """
    # Find all *.cpp / *.ino files recursively, same logic as discover_tests.py
    from discover_tests import TEST_SOURCE_GLOBS
    from test_config import EXCLUDED_TEST_DIRS, EXCLUDED_TEST_FILES

    test_files: list[Path] = []

    for f in sorted(chain.from_iterable(tests_dir.rglob(g) for g in TEST_SOURCE_GLOBS)):
        resolved = f.resolve()

        # Skip excluded files
        if resolved in EXCLUDED_TEST_FILES:
            continue

        # Skip files inside excluded directories
        if any(resolved.is_relative_to(d) for d in EXCLUDED_TEST_DIRS):
            continue

        # Skip hidden directories and .dir directories
        rel = f.relative_to(tests_dir)
        parent_parts = rel.parts[:-1]
        if any(part.startswith(".") or part.endswith(".dir") for part in parent_parts):
            continue
        test_files.append(f)

    unique_files = test_files  # already deduplicated by rglob + sorted

    # Create hash input from file metadata
    hash_input = []
    for f in unique_files:
        if f.is_file():
            stat = f.stat()
            rel_path = f.relative_to(tests_dir).as_posix()
            # Include path, mtime, and size in hash
            hash_input.append(f"{rel_path}:{stat.st_mtime:.6f}:{stat.st_size}")

    # Compute SHA256 hash
    hash_str = "\n".join(hash_input)
    return hashlib.sha256(hash_str.encode()).hexdigest()


def load_cache(build_dir: Path) -> dict | None: