Example #1
0
def test_rountrip():
    source_file_path = os.path.join(THIS_DIR, TEST_DATA,
                                    'SampleComposite-CAOM-2.3.xml')
    reader = obs_reader_writer.ObservationReader(True)
    with open(source_file_path, 'r'):
        obs = reader.read(source_file_path)

    filename = tempfile.TemporaryFile()
    writer = obs_reader_writer.ObservationWriter(True)
    writer.write(obs, filename)

    # go back to the beginning of the file
    filename.seek(0)
    obs = reader.read(filename)

    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)

    # check observation
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum == get_acc_meta_checksum(obs)
Example #2
0
def test_rountrip():
    source_file_path = os.path.join(THIS_DIR, TEST_DATA,
                                    'SampleComposite-CAOM-2.3.xml')
    reader = obs_reader_writer.ObservationReader(True)
    with open(source_file_path, 'r'):
        obs = reader.read(source_file_path)

    filename = tempfile.TemporaryFile()
    writer = obs_reader_writer.ObservationWriter(True)
    writer.write(obs, filename)

    # go back to the beginning of the file
    filename.seek(0)
    obs = reader.read(filename)

    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)

    # check observation
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum == get_acc_meta_checksum(obs)
Example #3
0
def test_compatibility_simple_obs():
    # tests loads a previously generated observation and checks the checksums
    # against the previously calculated (in Java) checksums
    logger = logging.getLogger('checksum')
    level = logger.getEffectiveLevel()
    logger.setLevel(logging.DEBUG)
    source_file_path = os.path.join(THIS_DIR, TEST_DATA,
                                    'SampleSimple-CAOM-2.3.xml')
    reader = obs_reader_writer.ObservationReader(True)
    with open(source_file_path, 'r'):
        obs = reader.read(source_file_path)

    writer = obs_reader_writer.ObservationWriter(True)
    writer.write(obs, '/tmp/test.xml')

    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(
                    part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)

    # check observation
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum == get_acc_meta_checksum(obs)
    logger.setLevel(level)
Example #4
0
def _common_check(obs):
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
Example #5
0
def test_round_trip():
    source_file_path = os.path.join(THIS_DIR, TEST_DATA,
                                    'SampleComposite-CAOM-2.3.xml')
    reader = obs_reader_writer.ObservationReader(True)
    with open(source_file_path, 'r'):
        obs = reader.read(source_file_path)

    filename = tempfile.TemporaryFile()
    writer = obs_reader_writer.ObservationWriter(
        True, namespace=obs_reader_writer.CAOM23_NAMESPACE)
    writer.write(obs, filename)

    # go back to the beginning of the file
    filename.seek(0)
    obs = reader.read(filename)
    _common_check(obs)

    # check observation
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum == get_acc_meta_checksum(obs)
Example #6
0
def test_compatibility_simple_obs():
    # tests loads a previously generated observation and checks the checksums
    # against the previously calculated (in Java) checksums
    logger = logging.getLogger('checksum')
    level = logger.getEffectiveLevel()
    logger.setLevel(logging.DEBUG)
    source_file_path = os.path.join(THIS_DIR, TEST_DATA,
                                    'SampleSimple-CAOM-2.3.xml')
    reader = obs_reader_writer.ObservationReader(True)
    with open(source_file_path, 'r'):
        obs = reader.read(source_file_path)

    writer = obs_reader_writer.ObservationWriter(
        True, namespace=obs_reader_writer.CAOM23_NAMESPACE)
    writer.write(obs, '/tmp/test.xml')
    _common_check(obs)

    # check observation
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum == get_acc_meta_checksum(obs)
    logger.setLevel(level)
Example #7
0
def test_compatibility():
    # tests loads a previously generated observation and checks the checksums
    # against the previously calculated (in Java) checksums

    source_file_path = os.path.join(THIS_DIR, TEST_DATA,
                                    'SampleComposite-CAOM-2.3.xml')
    reader = obs_reader_writer.ObservationReader(True)
    with open(source_file_path, 'r'):
        obs = reader.read(source_file_path)

    writer = obs_reader_writer.ObservationWriter(
        True, namespace=obs_reader_writer.CAOM23_NAMESPACE)
    writer.write(obs, '/tmp/test.xml')
    _common_check(obs)

    # check observation
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum == get_acc_meta_checksum(obs)

    # white spaces around strings should not affect the checksum
    obs.algorithm = ' {}\t\n'.format(obs.algorithm.name)
    assert obs.meta_checksum == get_meta_checksum(obs)

    # now change some attributes and see how the checksums start to diverge
    old_val = obs.collection
    obs.collection = 'OTHER'
    _common_check(obs)
    assert obs.meta_checksum != get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    obs.collection = old_val

    # now change a plane
    aplane = list(obs.planes.values())[0]
    old_val = aplane.product_id
    aplane.product_id = 'TESTPRODID'
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        if plane._id == aplane._id:
            assert plane.meta_checksum != get_meta_checksum(plane)
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.meta_checksum == get_meta_checksum(plane)
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    aplane.product_id = old_val

    # change an artifact
    anartifact = list(aplane.artifacts.values())[0]
    old_val = anartifact.content_length
    anartifact.content_length = 3344
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            if artifact._id == anartifact._id:
                assert artifact.meta_checksum != get_meta_checksum(artifact)
                assert artifact.acc_meta_checksum != get_acc_meta_checksum(
                    artifact)
            else:
                assert artifact.meta_checksum == get_meta_checksum(artifact)
                assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                    artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        if plane._id == aplane._id:
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    anartifact.content_length = old_val

    apart = list(anartifact.parts.values())[0]
    old_val = apart.name
    apart.name = 'therealpart'
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                if part._id == apart._id:
                    assert part.meta_checksum != get_meta_checksum(part)
                    assert part.acc_meta_checksum != get_acc_meta_checksum(
                        part)
                else:
                    assert part.meta_checksum == get_meta_checksum(part)
                    assert part.acc_meta_checksum == get_acc_meta_checksum(
                        part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            if artifact._id == anartifact._id:
                assert artifact.acc_meta_checksum != get_acc_meta_checksum(
                    artifact)
            else:
                assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                    artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        if plane._id == aplane._id:
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    apart.name = old_val

    achunk = list(apart.chunks)[0]
    old_val = chunk.naxis
    if old_val == 5:
        achunk.naxis = 4
    else:
        achunk.naxis = old_val + 1
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    if chunk._id == achunk._id:
                        assert chunk.meta_checksum != get_meta_checksum(chunk)
                        assert chunk.acc_meta_checksum !=\
                            get_acc_meta_checksum(chunk)
                    else:
                        assert chunk.meta_checksum == get_meta_checksum(chunk)
                        assert chunk.acc_meta_checksum ==\
                            get_acc_meta_checksum(chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                if part._id == apart._id:
                    assert part.acc_meta_checksum != get_acc_meta_checksum(
                        part)
                else:
                    assert part.acc_meta_checksum == get_acc_meta_checksum(
                        part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            if artifact._id == anartifact._id:
                assert artifact.acc_meta_checksum != get_acc_meta_checksum(
                    artifact)
            else:
                assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                    artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        if plane._id == aplane._id:
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    achunk.naxis = old_val

    # update the checksums and everything should match again
    update_meta_checksum(obs)
    _common_check(obs)
Example #8
0
def test_compatibility():
    # tests loads a previously generated observation and checks the checksums
    # against the previously calculated (in Java) checksums

    source_file_path = os.path.join(THIS_DIR, TEST_DATA,
                                    'SampleComposite-CAOM-2.3.xml')
    reader = obs_reader_writer.ObservationReader(True)
    with open(source_file_path, 'r'):
        obs = reader.read(source_file_path)

    writer = obs_reader_writer.ObservationWriter(True)
    writer.write(obs, '/tmp/test.xml')

    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)

    # check observation
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum == get_acc_meta_checksum(obs)

    # white spaces around strings should not affect the checksum
    obs.algorithm = ' {}\t\n'.format(obs.algorithm.name)
    assert obs.meta_checksum == get_meta_checksum(obs)

    # now change some attributes and see how the checksums start to diverge
    old_val = obs.collection
    obs.collection = 'OTHER'
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum != get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    obs.collection = old_val

    # now change a plane
    aplane = list(obs.planes.values())[0]
    old_val = aplane.product_id
    aplane.product_id = 'TESTPRODID'
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        if plane._id == aplane._id:
            assert plane.meta_checksum != get_meta_checksum(plane)
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.meta_checksum == get_meta_checksum(plane)
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    aplane.product_id = old_val

    # change an artifact
    anartifact = list(aplane.artifacts.values())[0]
    old_val = anartifact.content_length
    anartifact.content_length = 3344
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            if artifact._id == anartifact._id:
                assert artifact.meta_checksum != get_meta_checksum(artifact)
                assert artifact.acc_meta_checksum != get_acc_meta_checksum(
                    artifact)
            else:
                assert artifact.meta_checksum == get_meta_checksum(artifact)
                assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                    artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        if plane._id == aplane._id:
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    anartifact.content_length = old_val

    apart = list(anartifact.parts.values())[0]
    old_val = apart.name
    apart.name = 'therealpart'
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                if part._id == apart._id:
                    assert part.meta_checksum != get_meta_checksum(part)
                    assert part.acc_meta_checksum != get_acc_meta_checksum(
                        part)
                else:
                    assert part.meta_checksum == get_meta_checksum(part)
                    assert part.acc_meta_checksum == get_acc_meta_checksum(
                        part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            if artifact._id == anartifact._id:
                assert artifact.acc_meta_checksum != get_acc_meta_checksum(
                    artifact)
            else:
                assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                    artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        if plane._id == aplane._id:
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    apart.name = old_val

    achunk = list(apart.chunks)[0]
    old_val = chunk.naxis
    if old_val == 5:
        achunk.naxis = 4
    else:
        achunk.naxis = old_val + 1
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    if chunk._id == achunk._id:
                        assert chunk.meta_checksum != get_meta_checksum(chunk)
                        assert chunk.acc_meta_checksum !=\
                            get_acc_meta_checksum(chunk)
                    else:
                        assert chunk.meta_checksum == get_meta_checksum(chunk)
                        assert chunk.acc_meta_checksum ==\
                            get_acc_meta_checksum(chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                if part._id == apart._id:
                    assert part.acc_meta_checksum != get_acc_meta_checksum(
                        part)
                else:
                    assert part.acc_meta_checksum == get_acc_meta_checksum(
                        part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            if artifact._id == anartifact._id:
                assert artifact.acc_meta_checksum != get_acc_meta_checksum(
                    artifact)
            else:
                assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                    artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        if plane._id == aplane._id:
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    achunk.naxis = old_val

    # update the checksums and everything should match again
    update_meta_checksum(obs)
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
Example #9
0
def test_compatibility():
    # tests loads a previously generated observation and checks the checksums against the previously
    # calculated (in Java) checksums

    source_file_path = os.path.join(THIS_DIR, TEST_DATA,
                                    'SampleComposite-CAOM-2.3.xml')
    reader = obs_reader_writer.ObservationReader(True)
    with open(source_file_path, 'r') as f:
        obs = reader.read(source_file_path)

    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)

    # check observation
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum == get_acc_meta_checksum(obs)

    # now change some attributes and see how the checksums start to diverge
    old_val = obs.collection
    obs.collection = 'OTHER'
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum != get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    obs.collection = old_val

    # now change a plane
    aplane = list(obs.planes.values())[0]
    old_val = aplane.product_id
    aplane.product_id = 'TESTPRODID'
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                artifact)
        if plane._id == aplane._id:
            assert plane.meta_checksum != get_meta_checksum(plane)
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.meta_checksum == get_meta_checksum(plane)
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    aplane.product_id = old_val

    # change an artifact
    anartifact = list(aplane.artifacts.values())[0]
    old_val = anartifact.content_length
    anartifact.content_length = 3344
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                assert part.acc_meta_checksum == get_acc_meta_checksum(part)
            if artifact._id == anartifact._id:
                assert artifact.meta_checksum != get_meta_checksum(artifact)
                assert artifact.acc_meta_checksum != get_acc_meta_checksum(
                    artifact)
            else:
                assert artifact.meta_checksum == get_meta_checksum(artifact)
                assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                    artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        if plane._id == aplane._id:
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    anartifact.content_length = old_val

    apart = list(anartifact.parts.values())[0]
    old_val = apart.name
    apart.name = 'therealpart'
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    assert chunk.meta_checksum == get_meta_checksum(chunk)
                    assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                        chunk)
                if part._id == apart._id:
                    assert part.meta_checksum != get_meta_checksum(part)
                    assert part.acc_meta_checksum != get_acc_meta_checksum(
                        part)
                else:
                    assert part.meta_checksum == get_meta_checksum(part)
                    assert part.acc_meta_checksum == get_acc_meta_checksum(
                        part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            if artifact._id == anartifact._id:
                assert artifact.acc_meta_checksum != get_acc_meta_checksum(
                    artifact)
            else:
                assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                    artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        if plane._id == aplane._id:
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    apart.name = old_val

    achunk = list(apart.chunks)[0]
    old_val = chunk.naxis
    if old_val == 5:
        achunk.naxis = 4
    else:
        achunk.naxis = old_val + 1
    for plane in obs.planes.values():
        for artifact in plane.artifacts.values():
            for part in artifact.parts.values():
                for chunk in part.chunks:
                    if chunk._id == achunk._id:
                        assert chunk.meta_checksum != get_meta_checksum(chunk)
                        assert chunk.acc_meta_checksum != get_acc_meta_checksum(
                            chunk)
                    else:
                        assert chunk.meta_checksum == get_meta_checksum(chunk)
                        assert chunk.acc_meta_checksum == get_acc_meta_checksum(
                            chunk)
                assert part.meta_checksum == get_meta_checksum(part)
                if part._id == apart._id:
                    assert part.acc_meta_checksum != get_acc_meta_checksum(
                        part)
                else:
                    assert part.acc_meta_checksum == get_acc_meta_checksum(
                        part)
            assert artifact.meta_checksum == get_meta_checksum(artifact)
            if artifact._id == anartifact._id:
                assert artifact.acc_meta_checksum != get_acc_meta_checksum(
                    artifact)
            else:
                assert artifact.acc_meta_checksum == get_acc_meta_checksum(
                    artifact)
        assert plane.meta_checksum == get_meta_checksum(plane)
        if plane._id == aplane._id:
            assert plane.acc_meta_checksum != get_acc_meta_checksum(plane)
        else:
            assert plane.acc_meta_checksum == get_acc_meta_checksum(plane)
    assert obs.meta_checksum == get_meta_checksum(obs)
    assert obs.acc_meta_checksum != get_acc_meta_checksum(obs)
    achunk.naxis = old_val