test: cover module entrypoint (#10883)

Author: theamodhshetty

tests/test_main.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+import runpy
+
+from typing import TYPE_CHECKING
+
+import pytest
+
+
+if TYPE_CHECKING:
+    from pytest_mock import MockerFixture
+
+
+def test_module_entrypoint_exits_with_application_status(mocker: MockerFixture) -> None:
+    main_mock = mocker.patch("poetry.console.application.main", side_effect=lambda: 17)
+
+    with pytest.raises(SystemExit) as e:
+        runpy.run_module("poetry", run_name="__main__")
+
+    assert e.value.code == 17
+    assert main_mock.call_count == 1