Move unit_utils GPU test to specfic file (#756)

Summary: Pull Request resolved: #756

Reviewed By: JKSenthil

Differential Revision: D55257789

fbshipit-source-id: 645906442f243fcc872965c80e8d7fcc2e229fbe

Author: diego-urgell

tests/framework/test_unit_utils.py

@@ -11,17 +11,12 @@
 from typing import Dict, Iterator
 
 import torch
-
-from torch.distributed.fsdp import FullyShardedDataParallel as FSDP
 from torch.optim import Optimizer
 from torchtnt.framework._unit_utils import (
     _find_optimizers_for_module,
     _step_requires_iterator,
 )
 from torchtnt.framework.state import State
-from torchtnt.utils.distributed import spawn_multi_process
-from torchtnt.utils.env import init_from_env
-from torchtnt.utils.test_utils import skip_if_not_distributed, skip_if_not_gpu
 
 
 class UnitUtilsTest(unittest.TestCase):
@@ -55,26 +50,3 @@ def test_find_optimizers_for_module(self) -> None:
         optimizers = _find_optimizers_for_module(module2, opts)
         optim_name, _ = optimizers[0]
         self.assertEqual(optim_name, "optim2")
-
-    @skip_if_not_distributed
-    @skip_if_not_gpu
-    def test_find_optimizers_for_FSDP_module(self) -> None:
-        spawn_multi_process(2, "nccl", self._find_optimizers_for_FSDP_module)
-
-    @staticmethod
-    def _find_optimizers_for_FSDP_module() -> None:
-        device = init_from_env()
-        module1 = FSDP(torch.nn.Linear(10, 10).to(device))
-        module2 = torch.nn.Linear(10, 10)
-        optim1 = torch.optim.Adam(module1.parameters())
-        optim2 = torch.optim.Adagrad(module2.parameters())
-
-        opts: Dict[str, Optimizer] = {"optim1": optim1, "optim2": optim2}
-        optim_list = _find_optimizers_for_module(module1, opts)
-        optim_name, _ = optim_list[0]
-
-        tc = unittest.TestCase()
-        tc.assertEqual(optim_name, "optim1")
-        optim_list = _find_optimizers_for_module(module2, opts)
-        optim_name, _ = optim_list[0]
-        tc.assertEqual(optim_name, "optim2")

tests/framework/test_unit_utils_gpu.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+# pyre-strict
+
+import unittest
+from typing import Dict
+
+import torch
+
+from torch.distributed.fsdp import FullyShardedDataParallel as FSDP
+from torch.optim import Optimizer
+from torchtnt.framework._unit_utils import _find_optimizers_for_module
+from torchtnt.utils.distributed import spawn_multi_process
+from torchtnt.utils.env import init_from_env
+from torchtnt.utils.test_utils import skip_if_not_distributed, skip_if_not_gpu
+
+
+class UnitUtilsGPUTest(unittest.TestCase):
+    @skip_if_not_distributed
+    @skip_if_not_gpu
+    def test_find_optimizers_for_FSDP_module(self) -> None:
+        spawn_multi_process(2, "nccl", self._find_optimizers_for_FSDP_module)
+
+    @staticmethod
+    def _find_optimizers_for_FSDP_module() -> None:
+        device = init_from_env()
+        module1 = FSDP(torch.nn.Linear(10, 10).to(device))
+        module2 = torch.nn.Linear(10, 10)
+        optim1 = torch.optim.Adam(module1.parameters())
+        optim2 = torch.optim.Adagrad(module2.parameters())
+
+        opts: Dict[str, Optimizer] = {"optim1": optim1, "optim2": optim2}
+        optim_list = _find_optimizers_for_module(module1, opts)
+        optim_name, _ = optim_list[0]
+
+        tc = unittest.TestCase()
+        tc.assertEqual(optim_name, "optim1")
+        optim_list = _find_optimizers_for_module(module2, opts)
+        optim_name, _ = optim_list[0]
+        tc.assertEqual(optim_name, "optim2")