assert: faster and simpler isEmpty using reflect.Value.IsZero #1761
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ccoVeille
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Add a benchmark that shows that isEmpty does memory allocations. $ go test -bench Benchmark_isEmpty goos: darwin goarch: arm64 pkg: github.com/stretchr/testify/assert cpu: Apple M2 Benchmark_isEmpty-8 15074973 76.73 ns/op 8 B/op 1 allocs/op We can do better!
Refactor isEmpty to extract func isEmptyValue. This allows to avoid unwrapping/wrapping when checking pointer values.
Simplify isEmptyValue (used by assert.Empty) by checking early if the value is the zero value of the type using reflect.Value.IsZero (available since Go 1.13, so after the initial assert.Empty implementation). isEmpty is now faster. go test -bench Benchmark_isEmpty goos: darwin goarch: arm64 pkg: github.com/stretchr/testify/assert cpu: Apple M2 Before: Benchmark_isEmpty-8 15841243 77.27 ns/op 8 B/op 1 allocs/op After Benchmark_isEmpty-8 50665512 21.08 ns/op 0 B/op 0 allocs/op
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…nercloud/fleeting-plugin-hetzner!273) This MR contains the following updates: | Package | Change | Age | Confidence | |---|---|---|---| | [github.com/stretchr/testify](https://github.com/stretchr/testify) | `v1.10.0` -> `v1.11.0` | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | --- ### Release Notes <details> <summary>stretchr/testify (github.com/stretchr/testify)</summary> ### [`v1.11.0`](https://github.com/stretchr/testify/releases/tag/v1.11.0) [Compare Source](stretchr/testify@v1.10.0...v1.11.0) #### What's Changed ##### Functional Changes v1.11.0 Includes a number of performance improvements. - Call stack perf change for CallerInfo by [@​mikeauclair](https://github.com/mikeauclair) in [#​1614](stretchr/testify#1614) - Lazily render mock diff output on successful match by [@​mikeauclair](https://github.com/mikeauclair) in [#​1615](stretchr/testify#1615) - assert: check early in Eventually, EventuallyWithT, and Never by [@​cszczepaniak](https://github.com/cszczepaniak) in [#​1427](stretchr/testify#1427) - assert: add IsNotType by [@​bartventer](https://github.com/bartventer) in [#​1730](stretchr/testify#1730) - assert.JSONEq: shortcut if same strings by [@​dolmen](https://github.com/dolmen) in [#​1754](stretchr/testify#1754) - assert.YAMLEq: shortcut if same strings by [@​dolmen](https://github.com/dolmen) in [#​1755](stretchr/testify#1755) - assert: faster and simpler isEmpty using reflect.Value.IsZero by [@​dolmen](https://github.com/dolmen) in [#​1761](stretchr/testify#1761) - suite: faster methods filtering (internal refactor) by [@​dolmen](https://github.com/dolmen) in [#​1758](stretchr/testify#1758) ##### Fixes - assert.ErrorAs: log target type by [@​craig65535](https://github.com/craig65535) in [#​1345](stretchr/testify#1345) - Fix failure message formatting for Positive and Negative asserts in [#​1062](stretchr/testify#1062) - Improve ErrorIs message when error is nil but an error was expected by [@​tsioftas](https://github.com/tsioftas) in [#​1681](stretchr/testify#1681) - fix Subset/NotSubset when calling with mixed input types by [@​siliconbrain](https://github.com/siliconbrain) in [#​1729](stretchr/testify#1729) - Improve ErrorAs failure message when error is nil by [@​ccoVeille](https://github.com/ccoVeille) in [#​1734](stretchr/testify#1734) - mock.AssertNumberOfCalls: improve error msg by [@​3scalation](https://github.com/3scalation) in [#​1743](stretchr/testify#1743) ##### Documentation, Build & CI - docs: Fix typo in README by [@​alexandear](https://github.com/alexandear) in [#​1688](stretchr/testify#1688) - Replace deprecated io/ioutil with io and os by [@​alexandear](https://github.com/alexandear) in [#​1684](stretchr/testify#1684) - Document consequences of calling t.FailNow() by [@​greg0ire](https://github.com/greg0ire) in [#​1710](stretchr/testify#1710) - chore: update docs for Unset [#​1621](stretchr/testify#1621) by [@​techfg](https://github.com/techfg) in [#​1709](stretchr/testify#1709) - README: apply gofmt to examples by [@​alexandear](https://github.com/alexandear) in [#​1687](stretchr/testify#1687) - refactor: use %q and %T to simplify fmt.Sprintf by [@​alexandear](https://github.com/alexandear) in [#​1674](stretchr/testify#1674) - Propose Christophe Colombier (ccoVeille) as approver by [@​brackendawson](https://github.com/brackendawson) in [#​1716](stretchr/testify#1716) - Update documentation for the Error function in assert or require package by [@​architagr](https://github.com/architagr) in [#​1675](stretchr/testify#1675) - assert: remove deprecated build constraints by [@​alexandear](https://github.com/alexandear) in [#​1671](stretchr/testify#1671) - assert: apply gofumpt to internal test suite by [@​ccoVeille](https://github.com/ccoVeille) in [#​1739](stretchr/testify#1739) - CI: fix shebang in .ci.\*.sh scripts by [@​dolmen](https://github.com/dolmen) in [#​1746](stretchr/testify#1746) - assert,require: enable parallel testing on (almost) all top tests by [@​dolmen](https://github.com/dolmen) in [#​1747](stretchr/testify#1747) - suite.Passed: add one more status test report by [@​Ararsa-Derese](https://github.com/Ararsa-Derese) in [#​1706](stretchr/testify#1706) - Add Helper() method in internal mocks and assert.CollectT by [@​dolmen](https://github.com/dolmen) in [#​1423](stretchr/testify#1423) - assert.Same/NotSame: improve usage of Sprintf by [@​ccoVeille](https://github.com/ccoVeille) in [#​1742](stretchr/testify#1742) - mock: enable parallel testing on internal testsuite by [@​dolmen](https://github.com/dolmen) in [#​1756](stretchr/testify#1756) - suite: cleanup use of 'testing' internals at runtime by [@​dolmen](https://github.com/dolmen) in [#​1751](stretchr/testify#1751) - assert: check test failure message for Empty and NotEmpty by [@​ccoVeille](https://github.com/ccoVeille) in [#​1745](stretchr/testify#1745) - deps: fix dependency cycle with objx (again) by [@​dolmen](https://github.com/dolmen) in [#​1567](stretchr/testify#1567) - assert.Empty: comprehensive doc of "Empty"-ness rules by [@​dolmen](https://github.com/dolmen) in [#​1753](stretchr/testify#1753) - doc: improve godoc of top level 'testify' package by [@​dolmen](https://github.com/dolmen) in [#​1760](stretchr/testify#1760) - assert.ErrorAs: simplify retrieving the type name by [@​ccoVeille](https://github.com/ccoVeille) in [#​1740](stretchr/testify#1740) - assert.EqualValues: improve test coverage to 100% by [@​dolmen](https://github.com/dolmen) in [#​1763](stretchr/testify#1763) - suite.Run: simplify running of Setup/TeardownSuite by [@​renzoarreaza](https://github.com/renzoarreaza) in [#​1769](stretchr/testify#1769) - assert.CallerInfo: micro optimization by using LastIndexByte by [@​dolmen](https://github.com/dolmen) in [#​1767](stretchr/testify#1767) - assert.CallerInfo: micro cleanup by [@​dolmen](https://github.com/dolmen) in [#​1768](stretchr/testify#1768) - assert: refactor Test*FileExists and Test*DirExists tests to enable parallel testing by [@​dolmen](https://github.com/dolmen) in [#​1766](stretchr/testify#1766) - suite.Run: refactor handling of stats for improved readability by [@​dolmen](https://github.com/dolmen) in [#​1764](stretchr/testify#1764) - tests: improve captureTestingT helper by [@​ccoVeille](https://github.com/ccoVeille) in [#​1741](stretchr/testify#1741) - build(deps): bump actions/checkout from 4 to 5 by [@​dependabot](https://github.com/dependabot)\[bot] in [#​1778](stretchr/testify#1778) #### New Contributors - [@​greg0ire](https://github.com/greg0ire) made their first contribution in [#​1710](stretchr/testify#1710) - [@​techfg](https://github.com/techfg) made their first contribution in [#​1709](stretchr/testify#1709) - [@​mikeauclair](https://github.com/mikeauclair) made their first contribution in [#​1614](stretchr/testify#1614) - [@​cszczepaniak](https://github.com/cszczepaniak) made their first contribution in [#​1427](stretchr/testify#1427) - [@​architagr](https://github.com/architagr) made their first contribution in [#​1675](stretchr/testify#1675) - [@​tsioftas](https://github.com/tsioftas) made their first contribution in [#​1681](stretchr/testify#1681) - [@​siliconbrain](https://github.com/siliconbrain) made their first contribution in [#​1729](stretchr/testify#1729) - [@​bartventer](https://github.com/bartventer) made their first contribution in [#​1730](stretchr/testify#1730) - [@​Ararsa-Derese](https://github.com/Ararsa-Derese) made their first contribution in [#​1706](stretchr/testify#1706) - [@​renzoarreaza](https://github.com/renzoarreaza) made their first contribution in [#​1769](stretchr/testify#1769) - [@​3scalation](https://github.com/3scalation) made their first contribution in [#​1743](stretchr/testify#1743) **Full Changelog**: <stretchr/testify@v1.10.0...v1.11.0> </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. 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This PR contains the following updates: | Package | Change | Age | Confidence | |---|---|---|---| | [github.com/stretchr/testify](https://github.com/stretchr/testify) | `v1.10.0` -> `v1.11.1` | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | --- ### Release Notes <details> <summary>stretchr/testify (github.com/stretchr/testify)</summary> ### [`v1.11.1`](https://github.com/stretchr/testify/releases/tag/v1.11.1) [Compare Source](stretchr/testify@v1.11.0...v1.11.1) This release fixes [#​1785](stretchr/testify#1785) introduced in v1.11.0 where expected argument values implementing the stringer interface (`String() string`) with a method which mutates their value, when passed to mock.Mock.On (`m.On("Method", <expected>).Return()`) or actual argument values passed to mock.Mock.Called may no longer match one another where they previously did match. The behaviour prior to v1.11.0 where the stringer is always called is restored. Future testify releases may not call the stringer method at all in this case. #### What's Changed - Backport [#​1786](stretchr/testify#1786) to release/1.11: mock: revert to pre-v1.11.0 argument matching behavior for mutating stringers by [@​brackendawson](https://github.com/brackendawson) in [#​1788](stretchr/testify#1788) **Full Changelog**: <stretchr/testify@v1.11.0...v1.11.1> ### [`v1.11.0`](https://github.com/stretchr/testify/releases/tag/v1.11.0) [Compare Source](stretchr/testify@v1.10.0...v1.11.0) #### What's Changed ##### Functional Changes v1.11.0 Includes a number of performance improvements. - Call stack perf change for CallerInfo by [@​mikeauclair](https://github.com/mikeauclair) in [#​1614](stretchr/testify#1614) - Lazily render mock diff output on successful match by [@​mikeauclair](https://github.com/mikeauclair) in [#​1615](stretchr/testify#1615) - assert: check early in Eventually, EventuallyWithT, and Never by [@​cszczepaniak](https://github.com/cszczepaniak) in [#​1427](stretchr/testify#1427) - assert: add IsNotType by [@​bartventer](https://github.com/bartventer) in [#​1730](stretchr/testify#1730) - assert.JSONEq: shortcut if same strings by [@​dolmen](https://github.com/dolmen) in [#​1754](stretchr/testify#1754) - assert.YAMLEq: shortcut if same strings by [@​dolmen](https://github.com/dolmen) in [#​1755](stretchr/testify#1755) - assert: faster and simpler isEmpty using reflect.Value.IsZero by [@​dolmen](https://github.com/dolmen) in [#​1761](stretchr/testify#1761) - suite: faster methods filtering (internal refactor) by [@​dolmen](https://github.com/dolmen) in [#​1758](stretchr/testify#1758) ##### Fixes - assert.ErrorAs: log target type by [@​craig65535](https://github.com/craig65535) in [#​1345](stretchr/testify#1345) - Fix failure message formatting for Positive and Negative asserts in [#​1062](stretchr/testify#1062) - Improve ErrorIs message when error is nil but an error was expected by [@​tsioftas](https://github.com/tsioftas) in [#​1681](stretchr/testify#1681) - fix Subset/NotSubset when calling with mixed input types by [@​siliconbrain](https://github.com/siliconbrain) in [#​1729](stretchr/testify#1729) - Improve ErrorAs failure message when error is nil by [@​ccoVeille](https://github.com/ccoVeille) in [#​1734](stretchr/testify#1734) - mock.AssertNumberOfCalls: improve error msg by [@​3scalation](https://github.com/3scalation) in [#​1743](stretchr/testify#1743) ##### Documentation, Build & CI - docs: Fix typo in README by [@​alexandear](https://github.com/alexandear) in [#​1688](stretchr/testify#1688) - Replace deprecated io/ioutil with io and os by [@​alexandear](https://github.com/alexandear) in [#​1684](stretchr/testify#1684) - Document consequences of calling t.FailNow() by [@​greg0ire](https://github.com/greg0ire) in [#​1710](stretchr/testify#1710) - chore: update docs for Unset [#​1621](stretchr/testify#1621) by [@​techfg](https://github.com/techfg) in [#​1709](stretchr/testify#1709) - README: apply gofmt to examples by [@​alexandear](https://github.com/alexandear) in [#​1687](stretchr/testify#1687) - refactor: use %q and %T to simplify fmt.Sprintf by [@​alexandear](https://github.com/alexandear) in [#​1674](stretchr/testify#1674) - Propose Christophe Colombier (ccoVeille) as approver by [@​brackendawson](https://github.com/brackendawson) in [#​1716](stretchr/testify#1716) - Update documentation for the Error function in assert or require package by [@​architagr](https://github.com/architagr) in [#​1675](stretchr/testify#1675) - assert: remove deprecated build constraints by [@​alexandear](https://github.com/alexandear) in [#​1671](stretchr/testify#1671) - assert: apply gofumpt to internal test suite by [@​ccoVeille](https://github.com/ccoVeille) in [#​1739](stretchr/testify#1739) - CI: fix shebang in .ci.\*.sh scripts by [@​dolmen](https://github.com/dolmen) in [#​1746](stretchr/testify#1746) - assert,require: enable parallel testing on (almost) all top tests by [@​dolmen](https://github.com/dolmen) in [#​1747](stretchr/testify#1747) - suite.Passed: add one more status test report by [@​Ararsa-Derese](https://github.com/Ararsa-Derese) in [#​1706](stretchr/testify#1706) - Add Helper() method in internal mocks and assert.CollectT by [@​dolmen](https://github.com/dolmen) in [#​1423](stretchr/testify#1423) - assert.Same/NotSame: improve usage of Sprintf by [@​ccoVeille](https://github.com/ccoVeille) in [#​1742](stretchr/testify#1742) - mock: enable parallel testing on internal testsuite by [@​dolmen](https://github.com/dolmen) in [#​1756](stretchr/testify#1756) - suite: cleanup use of 'testing' internals at runtime by [@​dolmen](https://github.com/dolmen) in [#​1751](stretchr/testify#1751) - assert: check test failure message for Empty and NotEmpty by [@​ccoVeille](https://github.com/ccoVeille) in [#​1745](stretchr/testify#1745) - deps: fix dependency cycle with objx (again) by [@​dolmen](https://github.com/dolmen) in [#​1567](stretchr/testify#1567) - assert.Empty: comprehensive doc of "Empty"-ness rules by [@​dolmen](https://github.com/dolmen) in [#​1753](stretchr/testify#1753) - doc: improve godoc of top level 'testify' package by [@​dolmen](https://github.com/dolmen) in [#​1760](stretchr/testify#1760) - assert.ErrorAs: simplify retrieving the type name by [@​ccoVeille](https://github.com/ccoVeille) in [#​1740](stretchr/testify#1740) - assert.EqualValues: improve test coverage to 100% by [@​dolmen](https://github.com/dolmen) in [#​1763](stretchr/testify#1763) - suite.Run: simplify running of Setup/TeardownSuite by [@​renzoarreaza](https://github.com/renzoarreaza) in [#​1769](stretchr/testify#1769) - assert.CallerInfo: micro optimization by using LastIndexByte by [@​dolmen](https://github.com/dolmen) in [#​1767](stretchr/testify#1767) - assert.CallerInfo: micro cleanup by [@​dolmen](https://github.com/dolmen) in [#​1768](stretchr/testify#1768) - assert: refactor Test*FileExists and Test*DirExists tests to enable parallel testing by [@​dolmen](https://github.com/dolmen) in [#​1766](stretchr/testify#1766) - suite.Run: refactor handling of stats for improved readability by [@​dolmen](https://github.com/dolmen) in [#​1764](stretchr/testify#1764) - tests: improve captureTestingT helper by [@​ccoVeille](https://github.com/ccoVeille) in [#​1741](stretchr/testify#1741) - build(deps): bump actions/checkout from 4 to 5 by [@​dependabot](https://github.com/dependabot)\[bot] in [#​1778](stretchr/testify#1778) #### New Contributors - [@​greg0ire](https://github.com/greg0ire) made their first contribution in [#​1710](stretchr/testify#1710) - [@​techfg](https://github.com/techfg) made their first contribution in [#​1709](stretchr/testify#1709) - [@​mikeauclair](https://github.com/mikeauclair) made their first contribution in [#​1614](stretchr/testify#1614) - [@​cszczepaniak](https://github.com/cszczepaniak) made their first contribution in [#​1427](stretchr/testify#1427) - [@​architagr](https://github.com/architagr) made their first contribution in [#​1675](stretchr/testify#1675) - [@​tsioftas](https://github.com/tsioftas) made their first contribution in [#​1681](stretchr/testify#1681) - [@​siliconbrain](https://github.com/siliconbrain) made their first contribution in [#​1729](stretchr/testify#1729) - [@​bartventer](https://github.com/bartventer) made their first contribution in [#​1730](stretchr/testify#1730) - [@​Ararsa-Derese](https://github.com/Ararsa-Derese) made their first contribution in [#​1706](stretchr/testify#1706) - [@​renzoarreaza](https://github.com/renzoarreaza) made their first contribution in [#​1769](stretchr/testify#1769) - [@​3scalation](https://github.com/3scalation) made their first contribution in [#​1743](stretchr/testify#1743) **Full Changelog**: <stretchr/testify@v1.10.0...v1.11.0> </details> --- ### Configuration 📅 **Schedule**: Branch creation - Between 12:00 AM and 03:59 AM ( * 0-3 * * * ) (UTC), Automerge - Between 12:00 AM and 03:59 AM ( * 0-3 * * * ) (UTC). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS44Mi4xMCIsInVwZGF0ZWRJblZlciI6IjQxLjgyLjEwIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJLaW5kL0Nob3JlIl19--> <!--start release-notes-assistant--> <!--URL:https://code.forgejo.org/forgejo/runner--> - other - [PR](https://code.forgejo.org/forgejo/runner/pulls/915): <!--number 915 --><!--line 0 --><!--description VXBkYXRlIG1vZHVsZSBnaXRodWIuY29tL3N0cmV0Y2hyL3Rlc3RpZnkgdG8gdjEuMTEuMQ==-->Update module github.com/stretchr/testify to v1.11.1<!--description--> <!--end release-notes-assistant--> Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/915 Reviewed-by: earl-warren <[email protected]> Co-authored-by: Renovate Bot <[email protected]> Co-committed-by: Renovate Bot <[email protected]>
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Summary
Refactor
isEmptywhich is the backend ofassert.Emptyandassert.NotEmpty.Changes
add Benchmark_isEmptythat shows that some cases ofisEmptyallocate memoryisEmptyintoisEmptyandisEmptyValuefor more efficient recursion when checking pointer valuesisEmptyValueby usingreflect.Value.IsZero(available since Go 1.13, so after the initial implementation ofassert.IsEmpty).Motivation
reflect.Value.IsZerowhich doesn't allocate memory.Related issues