Add test to ensure the correct log level is set

1 files changed, 31 insertions, 0 deletions

diff --git a/setuptools/tests/test_logging.py b/setuptools/tests/test_logging.py
new file mode 100644
index 00000000..4677dc24
--- /dev/null
+++ b/setuptools/tests/test_logging.py
@@ -0,0 +1,31 @@
+import logging
+
+import pytest
+
+
+setup_py = """\
+from setuptools import setup
+
+setup(
+    name="test_logging",
+    version="0.0"
+)
+"""
+
+
+@pytest.mark.parametrize(
+    "flag, expected_level", [("--dry-run", "INFO"), ("--verbose", "DEBUG")]
+)
+def test_verbosity_level(tmp_path, flag, expected_level):
+    """Make sure the correct verbosity level is set (issue #3038)"""
+    import setuptools  # noqa: Import setuptools to monkeypatch distutils
+    import distutils  # <- load distutils after all the patches take place
+
+    setup_script = tmp_path / "setup.py"
+    setup_script.write_text(setup_py)
+    dist = distutils.core.run_setup(setup_script, stop_after="init")
+    dist.script_args = [flag, "sdist"]
+    dist.parse_command_line()  # <- where the log level is set
+    log_level = logging.root.getEffectiveLevel()  # <- setuptools uses the root logger
+    log_level_name = logging.getLevelName(log_level)
+    assert log_level_name == expected_level