当测试命令以非零状态退出且没有输出时, Benchmark 会将此练习记录为已解决

benchmark/benchmark.py:1038-1048 (run_unit_tests, defined at :981), read by its caller at :881-892; solved exercises are counted at :508. Code as of 5dc9490 (current main).

    success = result.returncode == 0
    res = result.stdout
    res = cleanup_test_output(res, testdir)
    ...
    if not success:
        print(f"Tests failed: {testdir}")
        return res

        try:
            errors = run_unit_tests(original_dname, testdir, history_fname, test_files)
        except subprocess.TimeoutExpired:
            errors = "Tests timed out!"
            timeouts += 1
        if errors:
            test_outcomes.append(False)
        else:
            test_outcomes.append(True)
            break

run_unit_tests reports a failing run by returning the runner's output and a passing run by returning None. The return code decides only whether that text is returned; the caller then decides pass or fail from whether the text is non-empty. A test command that exits non-zero with empty output returns "", so the exercise is recorded as solved (test_outcomes.append(True)) straight after the function has printed "Tests failed".