Distro selection (#1823)

opentelemetry-instrumentation/tests/auto_instrumentation/test_run.py

@@ -0,0 +1,118 @@
+# Copyright The OpenTelemetry Authors
+#
+# 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.
+# type: ignore
+
+from os import environ, getcwd
+from os.path import abspath, dirname, pathsep
+from unittest import TestCase
+from unittest.mock import patch
+
+from opentelemetry.environment_variables import OTEL_TRACES_EXPORTER
+from opentelemetry.instrumentation import auto_instrumentation
+
+
+class TestRun(TestCase):
+    auto_instrumentation_path = dirname(abspath(auto_instrumentation.__file__))
+
+    @classmethod
+    def setUpClass(cls):
+        cls.execl_patcher = patch(
+            "opentelemetry.instrumentation.auto_instrumentation.execl"
+        )
+        cls.which_patcher = patch(
+            "opentelemetry.instrumentation.auto_instrumentation.which"
+        )
+
+        cls.execl_patcher.start()
+        cls.which_patcher.start()
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.execl_patcher.stop()
+        cls.which_patcher.stop()
+
+    @patch("sys.argv", ["instrument", ""])
+    @patch.dict("os.environ", {"PYTHONPATH": ""})
+    def test_empty(self):
+        auto_instrumentation.run()
+        self.assertEqual(
+            environ["PYTHONPATH"],
+            pathsep.join([self.auto_instrumentation_path, getcwd()]),
+        )
+
+    @patch("sys.argv", ["instrument", ""])
+    @patch.dict("os.environ", {"PYTHONPATH": "abc"})
+    def test_non_empty(self):
+        auto_instrumentation.run()
+        self.assertEqual(
+            environ["PYTHONPATH"],
+            pathsep.join([self.auto_instrumentation_path, getcwd(), "abc"]),
+        )
+
+    @patch("sys.argv", ["instrument", ""])
+    @patch.dict(
+        "os.environ",
+        {"PYTHONPATH": pathsep.join(["abc", auto_instrumentation_path])},
+    )
+    def test_after_path(self):
+        auto_instrumentation.run()
+        self.assertEqual(
+            environ["PYTHONPATH"],
+            pathsep.join([self.auto_instrumentation_path, getcwd(), "abc"]),
+        )
+
+    @patch("sys.argv", ["instrument", ""])
+    @patch.dict(
+        "os.environ",
+        {
+            "PYTHONPATH": pathsep.join(
+                [auto_instrumentation_path, "abc", auto_instrumentation_path]
+            )
+        },
+    )
+    def test_single_path(self):
+        auto_instrumentation.run()
+        self.assertEqual(
+            environ["PYTHONPATH"],
+            pathsep.join([self.auto_instrumentation_path, getcwd(), "abc"]),
+        )
+
+
+class TestExecl(TestCase):
+    @patch("sys.argv", ["1", "2", "3"])
+    @patch("opentelemetry.instrumentation.auto_instrumentation.which")
+    @patch("opentelemetry.instrumentation.auto_instrumentation.execl")
+    def test_execl(
+        self, mock_execl, mock_which
+    ):  # pylint: disable=no-self-use
+        mock_which.configure_mock(**{"return_value": "python"})
+
+        auto_instrumentation.run()
+
+        mock_execl.assert_called_with("python", "python", "3")
+
+
+class TestArgs(TestCase):
+    @patch("opentelemetry.instrumentation.auto_instrumentation.execl")
+    def test_exporter(self, _):  # pylint: disable=no-self-use
+        with patch("sys.argv", ["instrument", "2"]):
+            auto_instrumentation.run()
+            self.assertIsNone(environ.get(OTEL_TRACES_EXPORTER))
+
+        with patch(
+            "sys.argv",
+            ["instrument", "--traces_exporter", "jaeger", "1", "2"],
+        ):
+            auto_instrumentation.run()
+            self.assertEqual(environ.get(OTEL_TRACES_EXPORTER), "jaeger")