Add test

tests/plugins/test_precision_plugin.py

@@ -0,0 +1,26 @@
+# Copyright The PyTorch Lightning team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from inspect import signature
+
+from pytorch_lightning.plugins.precision import PrecisionPlugin
+
+
+def test_precision_clip_gradients_signature():
+
+    expected_params_list = ['self', 'model', 'optimizer', 'clip_val', 'norm_type']
+
+    params = signature(PrecisionPlugin.clip_gradients).parameters
+    params_list = [param.name for param in params.values()]
+
+    assert params_list == expected_params_list