A little script for checking when the mtime of a folder changes

mtime_test.py

from pathlib import Path
from shutil import rmtree
from time import sleep
from contextlib import contextmanager


class Test:
    def __init__(self, path):
        self.path = path
        self.times = self.get_times()

    @contextmanager
    def test(self, label):
        sleep(1)
        yield
        new_times = self.get_times()
        if new_times != self.times:
            print("{}: yes".format(label, self.times, new_times))
            self.times = new_times
        else:
            print("{}: no".format(label))

    def get_times(self):
        stats = self.path.stat()
        return stats.st_mtime, stats.st_ctime


def main():
    # First create a folder that should be watched (remove it if it already exists)
    root = Path('root')
    if root.exists():
        rmtree('root')
    root.mkdir()
    t = Test(root)

    with t.test("Creating a file changes the times"):
        (root / "test.txt").write_text('hello')

    with t.test("Creating a folder changes the times"):
        (root / "sub").mkdir()

    with t.test("Creating a file within the subfolder changes the times"):
        (root / "sub" / "test.txt").write_text("lala")

    with t.test("Changing attributes of a file changes the times"):
        (root / "test.txt").chmod(0o755)

    with t.test("Change the content of the file changes the times"):
        (root / "test.txt").write_text("something new")

    with t.test("Renaming the file changes the times"):
        (root / "test.txt").rename(root / "test2.txt")

    with t.test("Removing the file changes the times"):
        (root / "test2.txt").unlink()



if __name__ == '__main__':
    main()