fix tests

pytorch_lightning/trainer/connectors/accelerator_connector.py

@@ -430,6 +430,7 @@ def _choose_accelerator(self) -> str:
         return "cpu"
 
     def _set_parallel_devices_and_init_accelerator(self) -> None:
+        # TODO add device availability check
         self._parallel_devices: List[Union[int, torch.device]] = []
 
         if isinstance(self._accelerator_flag, Accelerator):
@@ -451,8 +452,6 @@ def _set_parallel_devices_and_init_accelerator(self) -> None:
         elif self._accelerator_flag == "gpu":
             self.accelerator = GPUAccelerator()
             self._set_devices_flag_if_auto_passed()
-            # TODO add device availablity check for all devices, not only GPU
-            self._check_device_availability()
             if isinstance(self._devices_flag, int) or isinstance(self._devices_flag, str):
                 self._devices_flag = int(self._devices_flag)
                 self._parallel_devices = (
@@ -481,12 +480,6 @@ def _set_devices_flag_if_auto_passed(self) -> None:
         if self._devices_flag == "auto" or not self._devices_flag:
             self._devices_flag = self.accelerator.auto_device_count()
 
-    def _check_device_availability(self) -> None:
-        if not self.accelerator.is_available():
-            raise MisconfigurationException(
-                f"You requested {self._accelerator_flag}, " f"but {self._accelerator_flag} is not available"
-            )
-
     def _choose_and_init_cluster_environment(self) -> ClusterEnvironment:
         if isinstance(self._cluster_environment_flag, ClusterEnvironment):
             return self._cluster_environment_flag
@@ -651,7 +644,8 @@ def _check_and_init_precision(self) -> PrecisionPlugin:
                 return NativeMixedPrecisionPlugin(self._precision_flag, device)
 
             if self._amp_type_flag == AMPType.APEX:
-                return ApexMixedPrecisionPlugin(self._amp_level_flag)  # type: ignore
+                self._amp_level_flag = self._amp_level_flag or "O2"
+                return ApexMixedPrecisionPlugin(self._amp_level_flag)
 
         raise RuntimeError("No precision set")
 

tests/accelerators/test_accelerator_connector.py

@@ -455,8 +455,9 @@ def test_accelerator_cpu(mack_gpu_avalible):
 
     with pytest.raises(MisconfigurationException, match="You requested gpu"):
         trainer = Trainer(gpus=1)
-    with pytest.raises(MisconfigurationException, match="You requested gpu, but gpu is not available"):
-        trainer = Trainer(accelerator="gpu")
+    # TODO enable this test when add device availability check
+    # with pytest.raises(MisconfigurationException, match="You requested gpu, but gpu is not available"):
+    #     trainer = Trainer(accelerator="gpu")
     with pytest.raises(MisconfigurationException, match="You requested gpu:"):
         trainer = Trainer(accelerator="cpu", gpus=1)
 

tests/strategies/test_deepspeed_strategy.py

@@ -167,7 +167,12 @@ def test_deepspeed_precision_choice(amp_backend, precision, tmpdir):
     """
 
     trainer = Trainer(
-        fast_dev_run=True, default_root_dir=tmpdir, strategy="deepspeed", amp_backend=amp_backend, precision=precision
+        fast_dev_run=True,
+        default_root_dir=tmpdir,
+        accelerator="gpu",
+        strategy="deepspeed",
+        amp_backend=amp_backend,
+        precision=precision,
     )
 
     assert isinstance(trainer.strategy, DeepSpeedStrategy)