[Test refactor 1/5] Per-folder tests reorganization (#15725)

* Per-folder tests reorganization

Co-authored-by: sgugger <sylvain.gugger@gmail.com>
Co-authored-by: Stas Bekman <stas@stason.org>

tests/utils/test_cli.py

@@ -0,0 +1,32 @@
+# coding=utf-8
+# Copyright 2019-present, the HuggingFace Inc. 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.
+
+import unittest
+from unittest.mock import patch
+
+from transformers.testing_utils import CaptureStd
+
+
+class CLITest(unittest.TestCase):
+    @patch("sys.argv", ["fakeprogrampath", "env"])
+    def test_cli_env(self):
+        # test transformers-cli env
+        import transformers.commands.transformers_cli
+
+        with CaptureStd() as cs:
+            transformers.commands.transformers_cli.main()
+        self.assertIn("Python version", cs.out)
+        self.assertIn("Platform", cs.out)
+        self.assertIn("Using distributed or parallel set-up in script?", cs.out)