[Cherry-Pick] Fix ernie_vl_reasoning_parsers.py 'end_token' to 'think_end_token' (#4805)

fastdeploy/reasoning/ernie_vl_reasoning_parsers.py

@@ -70,9 +70,9 @@ def extract_reasoning_content_streaming(
         if len(delta_token_ids) == 1 and delta_token_ids[0] == self.think_end_token_id:
             return None
         if self.think_end_token_id in delta_token_ids:
-            end_index = delta_text.find(self.end_token)
+            end_index = delta_text.find(self.think_end_token)
             reasoning_content = delta_text[:end_index]
-            content = delta_text[end_index + len(self.end_token) :]
+            content = delta_text[end_index + len(self.think_end_token) :]
             return DeltaMessage(reasoning_content=reasoning_content, content=content)
         elif self.think_end_token_id in previous_token_ids:
             return DeltaMessage(content=delta_text)

tests/reasoning/test_reasoning_parser.py

@@ -21,6 +21,7 @@
 from fastdeploy.reasoning.ernie_45_vl_thinking_reasoning_parser import (
     Ernie45VLThinkingReasoningParser,
 )
+from fastdeploy.reasoning.ernie_vl_reasoning_parsers import ErnieVLReasoningParser
 from fastdeploy.reasoning.ernie_x1_reasoning_parsers import ErnieX1ReasoningParser
 
 
@@ -425,5 +426,60 @@ def test_batch_think_end_content_with_newline(self):
         self.assertEqual(content, "\n\n  actual response")
 
 
+class TestErnieVLReasoningParser(unittest.TestCase):
+    def setUp(self):
+        self.tokenizer = DummyTokenizer()
+        self.parser = ErnieVLReasoningParser(tokenizer=self.tokenizer)
+        self.test_request = ChatCompletionRequest(
+            model="ernie-test", messages=[{"role": "user", "content": "test prompt"}]
+        )
+
+    def test_extract_reasoning_content_stream(self):
+        result = self.parser.extract_reasoning_content_streaming(
+            previous_text="abc",
+            current_text="abc</think>xyz",
+            delta_text="</think>xyz",
+            previous_token_ids=[200, 201, 202],
+            current_token_ids=[200, 201, 202, 100, 110, 120, 130],
+            delta_token_ids=[100, 110, 120, 130],
+        )
+        self.assertIsInstance(result, DeltaMessage)
+        self.assertEqual(result.reasoning_content, "")
+        self.assertEqual(result.content, "xyz")
+
+    def test_extract_reasoning_content_stream_think_in_previous(self):
+        result = self.parser.extract_reasoning_content_streaming(
+            previous_text="abc</think>",
+            current_text="abc</think>xyz",
+            delta_text="xyz",
+            previous_token_ids=[200, 201, 202, 100],
+            current_token_ids=[200, 201, 202, 100, 110, 120, 130],
+            delta_token_ids=[110, 120, 130],
+        )
+        self.assertIsInstance(result, DeltaMessage)
+        self.assertIsNone(result.reasoning_content)
+        self.assertEqual(result.content, "xyz")
+
+    def test_extract_reasoning_content_stream_no_think_token(self):
+        result = self.parser.extract_reasoning_content_streaming(
+            previous_text="abc",
+            current_text="abcxyz",
+            delta_text="xyz",
+            previous_token_ids=[200, 201, 202],
+            current_token_ids=[200, 201, 202, 110, 120, 130],
+            delta_token_ids=[110, 120, 130],
+        )
+        self.assertIsInstance(result, DeltaMessage)
+        self.assertIsNone(result.content)
+        self.assertEqual(result.reasoning_content, "xyz")
+
+    def test_extract_reasoning_content(self):
+        reasoning, content = self.parser.extract_reasoning_content(
+            model_output="reasoning</think>\nactual response", request=self.test_request
+        )
+        self.assertEqual(reasoning, "reasoning")
+        self.assertEqual(content, "\nactual response")
+
+
 if __name__ == "__main__":
     unittest.main()