Merge pull request #179 from dmtucker/issue176

Add --mypy-no-status-check

src/pytest_mypy/__init__.py

@@ -84,6 +84,11 @@ def pytest_addoption(parser: pytest.Parser) -> None:
         type=str,
         help="adds custom mypy config file",
     )
+    group.addoption(
+        "--mypy-no-status-check",
+        action="store_true",
+        help="ignore mypy's exit status",
+    )
 
 
 def _xdist_worker(config: pytest.Config) -> Dict[str, Any]:
@@ -164,6 +169,7 @@ def pytest_collect_file(
             parent.config.option.mypy,
             parent.config.option.mypy_config_file,
             parent.config.option.mypy_ignore_missing_imports,
+            parent.config.option.mypy_no_status_check,
         ],
     ):
         # Do not create MypyFile instance for a .py file if a
@@ -183,7 +189,9 @@ def collect(self) -> Iterator[MypyItem]:
         # Since mypy might check files that were not collected,
         # pytest could pass even though mypy failed!
         # To prevent that, add an explicit check for the mypy exit status.
-        if not any(isinstance(item, MypyStatusItem) for item in self.session.items):
+        if not self.session.config.option.mypy_no_status_check and not any(
+            isinstance(item, MypyStatusItem) for item in self.session.items
+        ):
             yield MypyStatusItem.from_parent(
                 parent=self,
                 name=nodeid_name + "-status",

tests/test_pytest_mypy.py

@@ -548,3 +548,16 @@ def test_py_typed(testdir):
     testdir.makepyfile(**{name: "import pytest_mypy"})
     result = testdir.run("mypy", f"{name}.py")
     assert result.ret == 0
+
+
+def test_mypy_no_status_check(testdir, xdist_args):
+    """Verify that --mypy-no-status-check disables MypyStatusItem collection."""
+    testdir.makepyfile(thon="one: int = 1")
+    result = testdir.runpytest_subprocess("--mypy", *xdist_args)
+    mypy_file_checks = 1
+    mypy_status_check = 1
+    result.assert_outcomes(passed=mypy_file_checks + mypy_status_check)
+    assert result.ret == pytest.ExitCode.OK
+    result = testdir.runpytest_subprocess("--mypy-no-status-check", *xdist_args)
+    result.assert_outcomes(passed=mypy_file_checks)
+    assert result.ret == pytest.ExitCode.OK