[Core] Support multiple tasks per model (#20771)

Signed-off-by: NickLucche <nlucches@redhat.com>
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Co-authored-by: DarkLight1337 <tlleungac@connect.ust.hk>

Author: NickLucche

tests/test_config.py

@@ -54,7 +54,7 @@ def test_get_field():
         ("jason9693/Qwen2.5-1.5B-apeach", "pooling", "classify"),
         ("cross-encoder/ms-marco-MiniLM-L-6-v2", "pooling", "classify"),
         ("Qwen/Qwen2.5-Math-RM-72B", "pooling", "reward"),
-        ("openai/whisper-small", "transcription", "transcription"),
+        ("openai/whisper-small", "generate", "transcription"),
     ],
 )
 def test_auto_task(model_id, expected_runner_type, expected_task):
@@ -69,7 +69,11 @@ def test_auto_task(model_id, expected_runner_type, expected_task):
     )
 
     assert config.runner_type == expected_runner_type
-    assert config.task == expected_task
+
+    if config.runner_type == "pooling":
+        assert config.task == expected_task
+    else:
+        assert expected_task in config.supported_tasks
 
 
 @pytest.mark.parametrize(
@@ -98,11 +102,50 @@ def test_score_task(model_id, expected_runner_type, expected_task):
     assert config.task == expected_task
 
 
+@pytest.mark.parametrize(("model_id", "expected_runner_type", "expected_task"),
+                         [
+                             ("Qwen/Qwen2.5-1.5B-Instruct", "draft", "auto"),
+                         ])
+def test_draft_task(model_id, expected_runner_type, expected_task):
+    config = ModelConfig(
+        model_id,
+        runner="draft",
+        tokenizer=model_id,
+        seed=0,
+        dtype="float16",
+    )
+
+    assert config.runner_type == expected_runner_type
+    assert config.task == expected_task
+
+
+@pytest.mark.parametrize(
+    ("model_id", "expected_runner_type", "expected_task"),
+    [
+        ("openai/whisper-small", "generate", "transcription"),
+    ],
+)
+def test_transcription_task(model_id, expected_runner_type, expected_task):
+    config = ModelConfig(
+        model_id,
+        task="transcription",
+        tokenizer=model_id,
+        tokenizer_mode="auto",
+        trust_remote_code=False,
+        seed=0,
+        dtype="float16",
+    )
+
+    assert config.runner_type == expected_runner_type
+    assert config.task == expected_task
+
+
 @pytest.mark.parametrize(("model_id", "bad_task"), [
     ("Qwen/Qwen2.5-Math-RM-72B", "generate"),
+    ("Qwen/Qwen3-0.6B", "transcription"),
 ])
 def test_incorrect_task(model_id, bad_task):
-    with pytest.raises(ValueError, match=r"does not support the .* task"):
+    with pytest.raises(ValueError, match=r"does not support task=.*"):
         ModelConfig(
             model_id,
             task=bad_task,