add more coverage to unused import

tests/input/unused-import/mark_usesfixtures.py

@@ -0,0 +1,8 @@
+import pytest
+
+from other_fixture import other_fixture_not_in_conftest
+
+
+@pytest.mark.usefixtures("other_fixture_not_in_conftest")
+def uses_imported_fixture_with_decorator():
+    assert True

tests/input/unused-import/module.py

@@ -0,0 +1,5 @@
+import pytest
+
+
+def test_no_using_module():
+    assert True

tests/input/unused-import/other_fixture.py

@@ -0,0 +1,6 @@
+import pytest
+
+
+@pytest.fixture
+def other_fixture_not_in_conftest():
+    return True

tests/test_unused_import.py

@@ -40,3 +40,15 @@ def test_conftest(self, enable_plugin):
         for pytest to do its magic"""
         self.run_linter(enable_plugin)
         self.verify_messages(0 if enable_plugin else 1)
+
+    @pytest.mark.parametrize("enable_plugin", [True, False])
+    def test_module(self, enable_plugin):
+        """an unused module import shall still be an error"""
+        self.run_linter(enable_plugin)
+        self.verify_messages(1)
+
+    @pytest.mark.parametrize("enable_plugin", [True, False])
+    def test_mark_usesfixtures(self, enable_plugin):
+        """an unused module import shall still be an error"""
+        self.run_linter(enable_plugin)
+        self.verify_messages(0 if enable_plugin else 1)