test

tests/data/test_collator.py

@@ -0,0 +1,55 @@
+# Copyright 2024 the LlamaFactory team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import torch
+
+from llamafactory.data.collator import prepare_4d_attention_mask
+
+
+def test_4d_attention_mask():
+    o = 0.0
+    x = torch.finfo(torch.float16).min
+    attention_mask_with_indices = torch.tensor(
+        [
+            [1, 1, 2, 2, 2, 0],
+            [1, 2, 2, 3, 3, 3],
+        ]
+    )
+    attention_mask_computed = prepare_4d_attention_mask(attention_mask_with_indices, torch.float16)
+    attention_mask_expected = torch.tensor(
+        [
+            [
+                [
+                    [o, x, x, x, x, x],
+                    [o, o, x, x, x, x],
+                    [x, x, o, x, x, x],
+                    [x, x, o, o, x, x],
+                    [x, x, o, o, o, x],
+                    [x, x, x, x, x, x],
+                ]
+            ],
+            [
+                [
+                    [o, x, x, x, x, x],
+                    [x, o, x, x, x, x],
+                    [x, o, o, x, x, x],
+                    [x, x, x, o, x, x],
+                    [x, x, x, o, o, x],
+                    [x, x, x, o, o, o],
+                ]
+            ],
+        ],
+        dtype=torch.float16,
+    )
+    assert torch.all(attention_mask_computed == attention_mask_expected)