scheme_test.py 文件源码

def run_tests(src_file='tests.scm'):
    """Run a read-eval loop that reads from src_file and collects outputs."""
    sys.stderr = sys.stdout = io.StringIO() # Collect output to stdout and stderr
    reader = None
    try:
        reader = TestReader(open(src_file).readlines(), sys.stdout)
        src = Buffer(tokenize_lines(reader))
        def next_line():
            src.current()
            return src
        read_eval_print_loop(next_line, create_global_frame())
    except BaseException as exc:
        sys.stderr = sys.__stderr__
        if reader:
            print("Tests terminated due to unhandled exception "
                  "after line {0}:\n>>>".format(reader.line_number),
                  file=sys.stderr)
        raise
    finally:
        sys.stdout = sys.__stdout__  # Revert stdout
        sys.stderr = sys.__stderr__  # Revert stderr
    summarize(reader.output, reader.expected_output)