Implement functional tests on real BTRFS filesystems

[bodik]

thank you for awesome tool. you might consider using "real" BTRFS filesystem fixtures handy some time

def btrfstest_fs_instance(path):
    """create test btrfs filesystem"""

    testmount = Path(path)

    if testmount.exists():
        subprocess.run(f"umount --force --quiet {testmount}", check=False, shell=True)
        Path(f"{testmount}.raw").unlink(missing_ok=True)
    else:
        testmount.mkdir()

    subprocess.run(
        f"dd if=/dev/zero of={testmount}.raw bs=500M count=1", check=True, shell=True
    )
    subprocess.run(f"mkfs.btrfs {testmount}.raw", check=True, shell=True)
    subprocess.run(f"mount -o loop {testmount}.raw {testmount}", check=True, shell=True)

    yield testmount

    subprocess.run(f"umount {testmount}", check=True, shell=True)
    Path(f"{testmount}.raw").unlink(missing_ok=True)


@pytest.fixture(scope="function") 
def btrfstest_fs(): 
    """yield first test filesystem"""
    
    yield from btrfstest_fs_instance("/tmp/btrfstest")

[andreittr]

Thank you for your kind words and support! I hope the tool was as useful to you as it is to me.

You bring up an important point: btrsync needs proper functional tests on real filesystems in addition to unit tests (whether using pytest or just the std lib, TBD). This has been in the back of my mind for a while, and this is as good a time as any to implement them.

I'm taking the liberty and hijacking this issue to track the implementation of functional tests.