Added

• (testing) Added a new method absltest.TestCase.assertMappingEqual that tests equality of Mapping objects not requiring them to be dicts. Similar to assertSequenceEqual but for mappings.
• (testing) Added a new method absltest.assertDictContainsSubset that checks that a dictionary contains a subset of keys and values. Similar to a removed method unittest.assertDictContainsSubset (existed until Python 3.11).
• Added type annotations that are compliant with MyPy.

Changed

• Removed support for Python 3.7.

Fixed

• (testing) Fixed an issue where the test reporter crashes with exceptions with no string representation, starting with Python 3.11.

(The change log also includes changes in 2.2.0 and 2.2.1.)