Smoke tests for assorted plugins (#7721)

Co-authored-by: Bruno Oliveira <nicoddemus@gmail.com>
Co-authored-by: Thomas Grainger <tagrain@gmail.com>
Co-authored-by: Kyle Altendorf <sda@fstab.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/testing/test_config.py b/testing/test_config.py
index aa84a3cf5..0cfd11fd5 100644
--- a/testing/test_config.py
+++ b/testing/test_config.py
@@ -422,6 +422,25 @@ class TestParseIni:
         else:
             testdir.parseconfig()
 
+    def test_early_config_cmdline(self, testdir, monkeypatch):
+        """early_config contains options registered by third-party plugins.
+
+        This is a regression involving pytest-cov (and possibly others) introduced in #7700.
+        """
+        testdir.makepyfile(
+            myplugin="""
+            def pytest_addoption(parser):
+                parser.addoption('--foo', default=None, dest='foo')
+
+            def pytest_load_initial_conftests(early_config, parser, args):
+                assert early_config.known_args_namespace.foo == "1"
+            """
+        )
+        monkeypatch.setenv("PYTEST_PLUGINS", "myplugin")
+        testdir.syspathinsert()
+        result = testdir.runpytest("--foo=1")
+        result.stdout.fnmatch_lines("* no tests ran in *")
+
 
 class TestConfigCmdlineParsing:
     def test_parsing_again_fails(self, testdir):