Python - Test CharBPETokenizer

bindings/python/tests/implementations/test_char_bpe.py

@@ -0,0 +1,44 @@
+from ..utils import data_dir, openai_files
+from tokenizers import CharBPETokenizer
+
+
+class TestBertWordPieceBPE:
+    def test_basic_encode(self, openai_files):
+        tokenizer = CharBPETokenizer(openai_files["vocab"], openai_files["merges"])
+
+        output = tokenizer.encode("My name is John", "pair")
+        assert output.ids == [0, 253, 1362, 544, 0, 7, 12662, 2688]
+        assert output.tokens == [
+            "<unk>",
+            "y</w>",
+            "name</w>",
+            "is</w>",
+            "<unk>",
+            "o",
+            "hn</w>",
+            "pair</w>",
+        ]
+        assert output.offsets == [
+            (0, 1),
+            (1, 2),
+            (3, 7),
+            (8, 10),
+            (11, 12),
+            (12, 13),
+            (13, 15),
+            (0, 4),
+        ]
+        assert output.type_ids == [0, 0, 0, 0, 0, 0, 0, 1]
+
+    def test_lowercase(self, openai_files):
+        tokenizer = CharBPETokenizer(openai_files["vocab"], openai_files["merges"], lowercase=True)
+        output = tokenizer.encode("My name is John", "pair", add_special_tokens=False)
+        assert output.ids == [547, 1362, 544, 2476, 2688]
+        assert output.tokens == ["my</w>", "name</w>", "is</w>", "john</w>", "pair</w>"]
+        assert output.offsets == [(0, 2), (3, 7), (8, 10), (11, 15), (0, 4)]
+        assert output.type_ids == [0, 0, 0, 0, 1]
+
+    def test_decoding(self, openai_files):
+        tokenizer = CharBPETokenizer(openai_files["vocab"], openai_files["merges"], lowercase=True)
+        decoded = tokenizer.decode(tokenizer.encode("my name is john").ids)
+        assert decoded == "my name is john"

bindings/python/tests/utils.py

@@ -44,3 +44,15 @@ def bert_files(data_dir):
             "https://s3.amazonaws.com/models.huggingface.co/bert/bert-base-uncased-vocab.txt"
         ),
     }
+
+
+@pytest.fixture(scope="session")
+def openai_files(data_dir):
+    return {
+        "vocab": download(
+            "https://s3.amazonaws.com/models.huggingface.co/bert/openai-gpt-vocab.json"
+        ),
+        "merges": download(
+            "https://s3.amazonaws.com/models.huggingface.co/bert/openai-gpt-merges.txt"
+        ),
+    }