1 files changed, 82 insertions, 0 deletions
diff --git a/lib/sqlalchemy/testing/warnings.py b/lib/sqlalchemy/testing/warnings.py
new file mode 100644
index 0000000..3e78387
--- /dev/null
+++ b/lib/sqlalchemy/testing/warnings.py
@@ -0,0 +1,82 @@
+# testing/warnings.py
+# Copyright (C) 2005-2022 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+from __future__ import absolute_import
+
+import warnings
+
+from . import assertions
+from .. import exc as sa_exc
+from ..util.langhelpers import _warnings_warn
+
+
+class SATestSuiteWarning(Warning):
+    """warning for a condition detected during tests that is non-fatal
+
+    Currently outside of SAWarning so that we can work around tools like
+    Alembic doing the wrong thing with warnings.
+
+    """
+
+
+def warn_test_suite(message):
+    _warnings_warn(message, category=SATestSuiteWarning)
+
+
+def setup_filters():
+    """Set global warning behavior for the test suite."""
+
+    # TODO: at this point we can use the normal pytest warnings plugin,
+    # if we decide the test suite can be linked to pytest only
+
+    origin = r"^(?:test|sqlalchemy)\..*"
+
+    warnings.filterwarnings(
+        "ignore", category=sa_exc.SAPendingDeprecationWarning
+    )
+    warnings.filterwarnings("error", category=sa_exc.SADeprecationWarning)
+    warnings.filterwarnings("error", category=sa_exc.SAWarning)
+
+    warnings.filterwarnings("always", category=SATestSuiteWarning)
+
+    warnings.filterwarnings(
+        "error", category=DeprecationWarning, module=origin
+    )
+
+    # ignore things that are deprecated *as of* 2.0 :)
+    warnings.filterwarnings(
+        "ignore",
+        category=sa_exc.SADeprecationWarning,
+        message=r".*\(deprecated since: 2.0\)$",
+    )
+    warnings.filterwarnings(
+        "ignore",
+        category=sa_exc.SADeprecationWarning,
+        message=r"^The (Sybase|firebird) dialect is deprecated and will be",
+    )
+
+    try:
+        import pytest
+    except ImportError:
+        pass
+    else:
+        warnings.filterwarnings(
+            "once", category=pytest.PytestDeprecationWarning, module=origin
+        )
+
+
+def assert_warnings(fn, warning_msgs, regex=False):
+    """Assert that each of the given warnings are emitted by fn.
+
+    Deprecated.  Please use assertions.expect_warnings().
+
+    """
+
+    with assertions._expect_warnings(
+        sa_exc.SAWarning, warning_msgs, regex=regex
+    ):
+        return fn()