Fixed database typo and removed unnecessary class identifier.

venv/Lib/site-packages/skimage/_shared/tests/test_warnings.py

@@ -0,0 +1,37 @@
+import os
+from skimage._shared._warnings import expected_warnings
+import pytest
+
+
+@pytest.fixture(scope='function')
+def setup():
+    # Remove any environment variable if it exists
+    old_strictness = os.environ.pop('SKIMAGE_TEST_STRICT_WARNINGS', None)
+    yield
+    # Add the user's desired strictness
+    if old_strictness is not None:
+        os.environ['SKIMAGE_TEST_STRICT_WARNINGS'] = old_strictness
+
+
+def test_strict_warnigns_default(setup):
+    # By default we should fail on missing expected warnings
+    with pytest.raises(ValueError):
+        with expected_warnings(['some warnings']):
+            pass
+
+
+@pytest.mark.parametrize('strictness', ['1', 'true', 'True', 'TRUE'])
+def test_strict_warning_true(setup, strictness):
+    os.environ['SKIMAGE_TEST_STRICT_WARNINGS'] = strictness
+    with pytest.raises(ValueError):
+        with expected_warnings(['some warnings']):
+            pass
+
+
+@pytest.mark.parametrize('strictness', ['0', 'false', 'False', 'FALSE'])
+def test_strict_warning_false(setup, strictness):
+    # If the user doesnn't wish to be strict about warnigns
+    # the following shouldn't raise any error
+    os.environ['SKIMAGE_TEST_STRICT_WARNINGS'] = strictness
+    with expected_warnings(['some warnings']):
+        pass