Simplify running tests in a subprocess (#34213)

* check

* check

* check

* check

* add docstring

---------

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

src/transformers/testing_utils.py

@@ -2366,6 +2366,46 @@ def run_test_in_subprocess(test_case, target_func, inputs=None, timeout=None):
         test_case.fail(f'{results["error"]}')
 
 
+def run_test_using_subprocess(func):
+    """
+    To decorate a test to run in a subprocess using the `subprocess` module. This could avoid potential GPU memory
+    issues (GPU OOM or a test that causes many subsequential failing with `CUDA error: device-side assert triggered`).
+    """
+    import pytest
+
+    @functools.wraps(func)
+    def wrapper(*args, **kwargs):
+        if os.getenv("_INSIDE_SUB_PROCESS", None) == "1":
+            func(*args, **kwargs)
+        else:
+            test = " ".join(os.environ.get("PYTEST_CURRENT_TEST").split(" ")[:-1])
+            try:
+                import copy
+
+                env = copy.deepcopy(os.environ)
+                env["_INSIDE_SUB_PROCESS"] = "1"
+
+                # If not subclass of `unitTest.TestCase` and `pytestconfig` is used: try to grab and use the arguments
+                if "pytestconfig" in kwargs:
+                    command = list(kwargs["pytestconfig"].invocation_params.args)
+                    for idx, x in enumerate(command):
+                        if x in kwargs["pytestconfig"].args:
+                            test = test.split("::")[1:]
+                            command[idx] = "::".join([f"{func.__globals__['__file__']}"] + test)
+                    command = [f"{sys.executable}", "-m", "pytest"] + command
+                    command = [x for x in command if x not in ["--no-summary"]]
+                # Otherwise, simply run the test with no option at all
+                else:
+                    command = [f"{sys.executable}", "-m", "pytest", f"{test}"]
+
+                subprocess.run(command, env=env, check=True, capture_output=True)
+            except subprocess.CalledProcessError as e:
+                exception_message = e.stdout.decode()
+                raise pytest.fail(exception_message, pytrace=False)
+
+    return wrapper
+
+
 """
 The following contains utils to run the documentation tests without having to overwrite any files.
 

tests/models/imagegpt/test_modeling_imagegpt.py

@@ -18,7 +18,7 @@ import inspect
 import unittest
 
 from transformers import ImageGPTConfig
-from transformers.testing_utils import require_torch, require_vision, slow, torch_device
+from transformers.testing_utils import require_torch, require_vision, run_test_using_subprocess, slow, torch_device
 from transformers.utils import cached_property, is_torch_available, is_vision_available
 
 from ...generation.test_utils import GenerationTesterMixin
@@ -257,11 +257,9 @@ class ImageGPTModelTest(ModelTesterMixin, GenerationTesterMixin, PipelineTesterM
         self.assertEqual(len(scores), length)
         self.assertListEqual([iter_scores.shape for iter_scores in scores], [expected_shape] * len(scores))
 
-    @unittest.skip(
-        reason="After #33632, this test still passes, but many subsequential tests fail with `device-side assert triggered`"
-    )
+    @run_test_using_subprocess
     def test_beam_search_generate_dict_outputs_use_cache(self):
-        pass
+        super().test_beam_search_generate_dict_outputs_use_cache()
 
     def setUp(self):
         self.model_tester = ImageGPTModelTester(self)

tests/models/video_llava/test_modeling_video_llava.py

@@ -28,7 +28,14 @@ from transformers import (
     is_torch_available,
     is_vision_available,
 )
-from transformers.testing_utils import require_bitsandbytes, require_torch, require_torch_gpu, slow, torch_device
+from transformers.testing_utils import (
+    require_bitsandbytes,
+    require_torch,
+    require_torch_gpu,
+    run_test_using_subprocess,
+    slow,
+    torch_device,
+)
 
 from ...generation.test_utils import GenerationTesterMixin
 from ...test_configuration_common import ConfigTester
@@ -248,9 +255,7 @@ class VideoLlavaForConditionalGenerationModelTest(ModelTesterMixin, GenerationTe
     def test_flash_attention_2_padding_matches_padding_free_with_position_ids(self):
         pass
 
-    @unittest.skip(
-        reason="After #33533, this still passes, but many subsequential tests fail with `device-side assert triggered`"
-    )
+    @run_test_using_subprocess
     def test_mixed_input(self):
         config, inputs = self.model_tester.prepare_config_and_inputs_for_common()
         for model_class in self.all_model_classes: