Python - Test PostProcessors

bindings/python/tests/bindings/test_processors.py

@@ -0,0 +1,62 @@
+from ..utils import data_dir, roberta_files
+
+from tokenizers import Tokenizer
+from tokenizers.models import BPE
+from tokenizers.pre_tokenizers import ByteLevel as ByteLevelPreTokenizer
+from tokenizers.processors import PostProcessor, BertProcessing, RobertaProcessing, ByteLevel
+
+
+class TestBertProcessing:
+    def test_instantiate(self):
+        processor = BertProcessing(("[SEP]", 0), ("[CLS]", 1))
+        assert processor is not None
+        assert isinstance(processor, PostProcessor)
+
+    def test_processing(self):
+        tokenizer = Tokenizer(BPE.empty())
+        tokenizer.add_special_tokens(["[SEP]", "[CLS]"])
+        tokenizer.add_tokens(["my", "name", "is", "john", "pair"])
+        tokenizer.post_processor = BertProcessing(("[SEP]", 0), ("[CLS]", 1))
+
+        output = tokenizer.encode("my name", "pair")
+        assert output.tokens == ["[CLS]", "my", "name", "[SEP]", "pair", "[SEP]"]
+        assert output.ids == [1, 2, 3, 0, 6, 0]
+
+
+class TestRobertaProcessing:
+    def test_instantiate(self):
+        processor = RobertaProcessing(("</s>", 1), ("<s>", 0))
+        assert processor is not None
+        assert isinstance(processor, PostProcessor)
+
+    def test_processing(self):
+        tokenizer = Tokenizer(BPE.empty())
+        tokenizer.add_special_tokens(["<s>", "</s>"])
+        tokenizer.add_tokens(["my", "name", "is", "john", "pair"])
+        tokenizer.post_processor = RobertaProcessing(("</s>", 1), ("<s>", 0))
+
+        output = tokenizer.encode("my name", "pair")
+        assert output.tokens == ["<s>", "my", "name", "</s>", "</s>", "pair", "</s>"]
+        assert output.ids == [0, 2, 3, 1, 1, 6, 1]
+
+
+class TestByteLevelProcessing:
+    def test_instantiate(self):
+        assert ByteLevel() is not None
+        assert ByteLevel(trim_offsets=True) is not None
+        assert isinstance(ByteLevel(), PostProcessor)
+
+    def test_processing(self, roberta_files):
+        tokenizer = Tokenizer(BPE.from_files(roberta_files["vocab"], roberta_files["merges"]))
+        tokenizer.pre_tokenizer = ByteLevelPreTokenizer(add_prefix_space=True)
+
+        # Keeps original offsets
+        output = tokenizer.encode("My name is John")
+        assert output.tokens == ["ĠMy", "Ġname", "Ġis", "ĠJohn"]
+        assert output.offsets == [(0, 2), (2, 7), (7, 10), (10, 15)]
+
+        # Trims offsets when activated
+        tokenizer.post_processor = ByteLevel(trim_offsets=True)
+        output = tokenizer.encode("My name is John")
+        assert output.tokens == ["ĠMy", "Ġname", "Ġis", "ĠJohn"]
+        assert output.offsets == [(0, 2), (3, 7), (8, 10), (11, 15)]