test: add is_sorted to tests

tests/test_blob_repairer.py

@@ -417,7 +417,7 @@ def test_check_index_non_valid(_mocked_exists,
 @mock.patch('eblob_kit.is_destination_writable', return_value=True)
 @mock.patch(OPEN_TO_PATCH, new_callable=mock.mock_open)
 @mock.patch('eblob_kit.Blob', autospec=True)
-def test_fix_destination_writable(mocked_blob,
+def test_fix_destination_writable(_mocked_blob,
                                   _mocked_open,
                                   _mocked_is_writable,
                                   callee):
@@ -426,11 +426,6 @@ def test_fix_destination_writable(mocked_blob,
     Checks for `copy_valid_records`, `recover_index` and `recover_blob`.
 
     """
-    mocked_blob.create.return_value = mocked_blob
-    mocked_blob.get_index_data_path_tuple.return_value = (None, None)
-
-    type(mocked_blob.return_value.data).path = mock.PropertyMock(return_value='data')
-
     blob_repairer = BlobRepairer('.')
 
     if callee == BlobRepairer.recover_index:

tests/test_is_sortable.py

@@ -0,0 +1,30 @@
+import eblob_kit
+
+from collections import namedtuple
+
+
+DummyRecord = namedtuple('DummyRecord', 'a b')
+
+
+def test_sequence_is_sorted_default_key():
+    """Test that sequence is sorted with default key selector."""
+    sorted_sequence = [-1, 1, 2, 3, 4, 5, 10, 100, 1000]
+    assert eblob_kit.is_sorted(sorted_sequence)
+
+
+def test_sequence_not_sorted_default_key():
+    """Test that sequence is not sorted with default key selector."""
+    non_sorted_sequence = [-1, 1, 2, 3, 4, 5, 10, 100, 99, 1000]
+    assert not eblob_kit.is_sorted(non_sorted_sequence)
+
+
+def test_sequence_is_sorted_custom_key():
+    """Test sequence is sorted with custom field selector."""
+    sequence_length = 5
+    sequence = [
+        DummyRecord(i, sequence_length - i) for i in xrange(sequence_length)
+    ]
+
+    assert eblob_kit.is_sorted(sequence)
+    assert eblob_kit.is_sorted(sequence, lambda x: x.a)
+    assert not eblob_kit.is_sorted(sequence, lambda x: x.b)