What's Changed

Functional Changes

• assert: make *AssertionFunc types just aliases by @dolmen in https://github.com/stretchr/testify/pull/1563

Fixes

• mock: avoid panic when expected type is nil in Arguments.Diff by @mutaiib in https://github.com/stretchr/testify/pull/1775
• mock: revert to pre-v1.11.0 argument matching behavior for mutating stringers by @brackendawson in https://github.com/stretchr/testify/pull/1786
• suite: validate method signatures and continue execution for valid tests by @vyas-git in https://github.com/stretchr/testify/pull/1665
• assert.PanicsWithError: report error message by @olivergondza in https://github.com/stretchr/testify/pull/1400
• assert: IsIncreasing et al can return false w/out failing by @brackendawson in https://github.com/stretchr/testify/pull/1787
• add type to error message of assert.Same by @egawata in https://github.com/stretchr/testify/pull/1792
• mock.AssertExpectationsForObjects fix panic with wrong testObject type. by @brackendawson in https://github.com/stretchr/testify/pull/1795
• assert: truncate very long objects in test failure messages by @brackendawson in https://github.com/stretchr/testify/pull/1646
• assert: fix NotSubset error messages using %#v instead of %q (fixes #1800) by @nghiack7 in https://github.com/stretchr/testify/pull/1888
• suite: prevent panic when SetupTest skips with HandleStats by @blackwell-systems in https://github.com/stretchr/testify/pull/1877

Documentation, Build & CI

• CI: test also with Go 1.23 by @dolmen in https://github.com/stretchr/testify/pull/1783
• Vendor unmaintained github.com/pmezard/go-difflib by @brackendawson in https://github.com/stretchr/testify/pull/1708
• Promote ccoVeille to maintainer by @brackendawson in https://github.com/stretchr/testify/pull/1784
• build(deps): bump actions/setup-go from 5 to 6 by @dependabot[bot] in https://github.com/stretchr/testify/pull/1790
• assert.YAMLEq: Document mutlidoc behavior by @brackendawson in https://github.com/stretchr/testify/pull/1791
• _codegen: copy dependency github.com/ernesto-jimenez/gogen/imports by @dolmen in https://github.com/stretchr/testify/pull/1782
• doc: remove ineffective inline code blocks by @brackendawson in https://github.com/stretchr/testify/pull/1714
• Tag generated assertions as non-generated in new .gitattributes by @ubunatic in https://github.com/stretchr/testify/pull/1815
• chore: vendor go-spew from https://github.com/davecgh/go-spew by @ccoVeille in https://github.com/stretchr/testify/pull/1827
• require: fix godoc generation for assertions returning a bool by @Baxromumarov in https://github.com/stretchr/testify/pull/1850
• docs(require): correct example usage to use assert.CollectT (require.CollectT does not exist) by @a2not in https://github.com/stretchr/testify/pull/1821
• docs: Fix EventuallyWithTf documentation with proper placement of formatting arguments by @a2not in https://github.com/stretchr/testify/pull/1842
• EMERITUS.md: add @tylerb by @dolmen in https://github.com/stretchr/testify/pull/1812
• CI: test also with Go 1.24 by @alexandear in https://github.com/stretchr/testify/pull/1856
• deps: bump objx to v0.5.3 and remove dependency cycle issue by @ccoVeille in https://github.com/stretchr/testify/pull/1823
• CI: upgrade GitHub Actions and pin hashes by @SuperQ in https://github.com/stretchr/testify/pull/1883
• CI: add _readme-gofmt tool to reformat Go code in README by @dolmen in https://github.com/stretchr/testify/pull/1889
• CI: add check of GitHub Action pinned hashes against tag by @dolmen in https://github.com/stretchr/testify/pull/1885
• _codegen: modernize by @dolmen in https://github.com/stretchr/testify/pull/1890
• build(deps): bump actions/checkout from 6.0.2 to 6.0.3 by @dependabot[bot] in https://github.com/stretchr/testify/pull/1906
• mock: Mock.Return does not exist anymore by @Kentzo in https://github.com/stretchr/testify/pull/1905

New Contributors

• @mutaiib made their first contribution in https://github.com/stretchr/testify/pull/1775
• @vyas-git made their first contribution in https://github.com/stretchr/testify/pull/1665
• @olivergondza made their first contribution in https://github.com/stretchr/testify/pull/1400
• @egawata made their first contribution in https://github.com/stretchr/testify/pull/1792
• @ubunatic made their first contribution in https://github.com/stretchr/testify/pull/1815
• @Baxromumarov made their first contribution in https://github.com/stretchr/testify/pull/1850
• @a2not made their first contribution in https://github.com/stretchr/testify/pull/1821
• @nghiack7 made their first contribution in https://github.com/stretchr/testify/pull/1888
• @blackwell-systems made their first contribution in https://github.com/stretchr/testify/pull/1877
• @Kentzo made their first contribution in https://github.com/stretchr/testify/pull/1905

Full Changelog: https://github.com/stretchr/testify/compare/v1.11.0...v1.12.0

What's Changed

• mock: avoid panic when expected type is nil in Arguments.Diff by @mutaiib in https://github.com/stretchr/testify/pull/1775
• CI: test also with Go 1.23 by @dolmen in https://github.com/stretchr/testify/pull/1783
• mock: revert to pre-v1.11.0 argument matching behavior for mutating stringers by @brackendawson in https://github.com/stretchr/testify/pull/1786
• suite: validate method signatures and continue execution for valid tests by @vyas-git in https://github.com/stretchr/testify/pull/1665
• Vendor unmaintained github.com/pmezard/go-difflib by @brackendawson in https://github.com/stretchr/testify/pull/1708
• Promote ccoVeille to maintainer by @brackendawson in https://github.com/stretchr/testify/pull/1784
• build(deps): bump actions/setup-go from 5 to 6 by @dependabot[bot] in https://github.com/stretchr/testify/pull/1790
• assert.PanicsWithError: report error message by @olivergondza in https://github.com/stretchr/testify/pull/1400
• assert: IsIncreasing et al can return false w/out failing by @brackendawson in https://github.com/stretchr/testify/pull/1787
• add type to error message of assert.Same by @egawata in https://github.com/stretchr/testify/pull/1792
• assert.YAMLEq: Document mutlidoc behavior by @brackendawson in https://github.com/stretchr/testify/pull/1791
• mock.AssertExpectationsForObjects fix panic with wrong testObject type. by @brackendawson in https://github.com/stretchr/testify/pull/1795
• _codegen: copy dependency github.com/ernesto-jimenez/gogen/imports by @dolmen in https://github.com/stretchr/testify/pull/1782
• assert: truncate very long objects in test failure messages by @brackendawson in https://github.com/stretchr/testify/pull/1646
• doc: remove ineffective inline code blocks by @brackendawson in https://github.com/stretchr/testify/pull/1714
• Tag generated assertions as non-generated in new .gitattributes by @ubunatic in https://github.com/stretchr/testify/pull/1815
• chore: vendor go-spew from https://github.com/davecgh/go-spew by @ccoVeille in https://github.com/stretchr/testify/pull/1827
• require: fix godoc generation for assertions returning a bool by @Baxromumarov in https://github.com/stretchr/testify/pull/1850
• docs(require): correct example usage to use assert.CollectT (require.CollectT does not exist) by @a2not in https://github.com/stretchr/testify/pull/1821
• docs: Fix EventuallyWithTf documentation with proper placement of formatting arguments by @a2not in https://github.com/stretchr/testify/pull/1842
• EMERITUS.md: add @tylerb by @dolmen in https://github.com/stretchr/testify/pull/1812
• CI: test also with Go 1.24 by @alexandear in https://github.com/stretchr/testify/pull/1856
• deps: bump objx to v0.5.3 and remove dependency cycle issue by @ccoVeille in https://github.com/stretchr/testify/pull/1823
• CI: upgrade GitHub Actions and pin hashes by @SuperQ in https://github.com/stretchr/testify/pull/1883
• assert: fix NotSubset error messages using %#v instead of %q (fixes #1800) by @nghiack7 in https://github.com/stretchr/testify/pull/1888
• suite: prevent panic when SetupTest skips with HandleStats by @blackwell-systems in https://github.com/stretchr/testify/pull/1877
• CI: add _readme-gofmt tool to reformat Go code in README by @dolmen in https://github.com/stretchr/testify/pull/1889
• CI: add check of GitHub Action pinned hashes against tag by @dolmen in https://github.com/stretchr/testify/pull/1885
• _codegen: modernize by @dolmen in https://github.com/stretchr/testify/pull/1890
• assert: make *AssertionFunc types just aliases by @dolmen in https://github.com/stretchr/testify/pull/1563
• build(deps): bump actions/checkout from 6.0.2 to 6.0.3 by @dependabot[bot] in https://github.com/stretchr/testify/pull/1906
• mock: Mock.Return does not exist anymore by @Kentzo in https://github.com/stretchr/testify/pull/1905

New Contributors

• @mutaiib made their first contribution in https://github.com/stretchr/testify/pull/1775
• @vyas-git made their first contribution in https://github.com/stretchr/testify/pull/1665
• @olivergondza made their first contribution in https://github.com/stretchr/testify/pull/1400
• @egawata made their first contribution in https://github.com/stretchr/testify/pull/1792
• @ubunatic made their first contribution in https://github.com/stretchr/testify/pull/1815
• @Baxromumarov made their first contribution in https://github.com/stretchr/testify/pull/1850
• @a2not made their first contribution in https://github.com/stretchr/testify/pull/1821
• @nghiack7 made their first contribution in https://github.com/stretchr/testify/pull/1888
• @blackwell-systems made their first contribution in https://github.com/stretchr/testify/pull/1877
• @Kentzo made their first contribution in https://github.com/stretchr/testify/pull/1905

Full Changelog: https://github.com/stretchr/testify/compare/v1.11.0...v1.12.0