def test_del_property_valid():
df = mg.read_csv_metadata(path_for_A)
mg.set_key(df, 'ID')
assert_equal(mg.get_key(df), 'ID')
mg.del_property(df, 'key')
assert_equal(mg.is_property_present_for_df(df, 'key'), False)
mg.del_catalog()
def test_set_key_valid():
df = mg.read_csv_metadata(path_for_A)
mg.set_key(df, 'ID')
assert_equal(mg.get_key(df), 'ID')
mg.del_property(df, 'key')
assert_equal(len(mg.get_all_properties(df)), 0)