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feat(mocks): add ClearCalls, PassThrough toggle and string/type/reference matchers - #7018

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Quattordici:main
Oct 12, 2026
Merged

thomhurst merged 36 commits into
thomhurst:mainfrom
Quattordici:main

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@Quattordici

@Quattordici Quattordici commented Oct 10, 2026 •

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Description

Adds three small TUnit.Mocks features:

  1. ClearCalls() on Mock<T> and MockRepository. It clears recorded calls but keeps setups, state, auto-tracked properties and event subscriptions (Reset() still clears everything).
  2. PassThrough (default true, so existing behaviour is unchanged). When false, unconfigured virtual members of class and wrap mocks no longer run the base implementation. Loose mocks return smart defaults, auto-mocks and DefaultValueProvider values; strict mocks throw MockStrictBehaviorException.
  3. Matchers: StartsWith, EndsWith, Contains(string) (optional StringComparison), IsOfType<TDerived>() and IsSameAs(reference).

Also: the typed TryHandleCallWithReturn overloads now pass the auto-mock factory through (they previously dropped it), which PassThrough = false needs. Docs and the Moq/NSubstitute/FakeItEasy migration pages are updated.

Related Issue

None.

Type of Change

  • New feature (non-breaking change that adds functionality)

Note (release notes): nothing is source-breaking. ClearCalls() and PassThrough live on new opt-in interfaces (IMockCallHistory, IMockPassThrough) that Mock<T> implements, so IMock and IMockControl<T> are unchanged. Reset() keeps PassThrough, like Behavior and DefaultValueProvider.

Checklist

Required

  • I have read the Contributing Guidelines
  • If this is a new feature, I started a discussion first and received agreement (not done, happy to open one if preferred)
  • My code follows the project's code style
  • I have written tests that prove my feature works

TUnit-Specific Requirements

  • Snapshot Tests: ran TUnit.Mocks.SourceGenerator.Tests, reviewed every diff (purely additive: the new ClearCalls/PassThrough polyfills) and committed the updated .verified.txt files
  • Performance: the only hot-path change is one volatile bool read on the unmatched class-call path
  • AOT Compatibility: no new reflection (Type.IsInstanceOfType only)

Testing

Run on net10.0: TUnit.Mocks.Tests 1376 passed (40 new), generator snapshots 170, Analyzers 64, Http 58, Logging 31, InternalsAccess 34. net8.0/net9.0 compile but were not executed locally (runtimes unavailable). New doc snippets were compiled in a scratch test; Verify-DocSnippets.ps1 was not run.

Summary by CodeRabbit

  • New Features
    • Added ClearCalls() to clear recorded mock calls while preserving setups and mock state, with support for clearing calls across a repository.
    • Added PassThrough controls for class and wrapped mocks, allowing unconfigured virtual calls to skip base implementations.
    • Added argument matchers for string prefixes, suffixes, and substrings, runtime types, and reference identity.
  • Documentation
    • Updated mocking guides with details on call clearing, pass-through behavior, matcher options, and migration guidance.

claude and others added 2 commits October 10, 2026 06:49
…ference matchers

- ClearInvocations() on Mock<T> and MockRepository clears recorded calls while
  keeping setups, state and auto-tracked properties (Reset() clears everything).
- CallBase (default true) on class and wrap mocks: when false, unconfigured
  virtual members return smart defaults / auto-mocks (loose) or throw (strict)
  instead of running the base implementation.
- New matchers: StartsWith, EndsWith, Contains(string), IsOfType<T>, IsSameAs.
- Typed TryHandleCallWithReturn overloads now carry the auto-mock factory.
- Docs, migration pages and generator snapshots updated.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Gx2TDcnLThUsu4UCQW77eJ
…-callbase-string-matchers

Add CallBase, ClearInvocations, and string/type matchers to mocks
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📒 Files selected for processing (12)
  • docs/docs/writing-tests/mocking/advanced.md
  • docs/docs/writing-tests/mocking/argument-matchers.md
  • src/TUnit.Mocks/Arguments/Arg.cs
  • src/TUnit.Mocks/Arguments/ArgOfT.cs
  • src/TUnit.Mocks/Matchers/ReferenceEqualsMatcher.cs
  • src/TUnit.Mocks/MockEngine.Typed.AutoMock.cs
  • src/TUnit.Mocks/MockEngine.Typed.cs
  • src/TUnit.Mocks/MockEngine.cs
  • src/TUnit.Mocks/Setup/MethodSetup.cs
  • tests/TUnit.Mocks.Tests/ClearCallsTests.cs
  • tests/TUnit.Mocks.Tests/PassThroughTests.cs
  • tests/TUnit.Mocks.Tests/StringAndTypeMatcherTests.cs



























🚧 Files skipped from review as they are similar to previous changes (2)
  • docs/docs/writing-tests/mocking/argument-matchers.md
  • docs/docs/writing-tests/mocking/advanced.md



























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Review of ClearInvocations, CallBase and the new matchers

I couldn't run the automated review skill, so this is a manual read of the engine, matcher and generator changes. I didn't build the code or run the tests.

Overall: The feature set is coherent and the defaults are safe. CallBase defaults to true. The matchers are simple, AOT-friendly (IsInstanceOfType only) and null-safe. The typed TryHandleCallWithReturn overloads used to drop autoMockFactory, and that is fixed. ClearInvocations is correctly narrower than Reset().

Suggestions

  1. Duplicated CallBase blocks across arities. Every arity in MockEngine.Typed.cs (1 to 8) repeats the same two blocks: the void/setter strict-or-store path and the !CallBase return path. Pull each into a private helper that formats the call lazily. Otherwise a behaviour fix has to be made 16 times and the copies can drift apart.

  2. Auto-tracked setter value uses arg1 in every arity. For a multi-argument setter such as an indexer set_Item(index, value), StoreAutoTrackedSetter(memberName, arg1) stores the index, not the value. Restrict the store to the single-argument overload, or use the last argument, and keep it consistent with the non-typed path (args[0]).

  3. ClearInvocations only nulls _callArrays. Please confirm nothing else derived from recorded calls survives the clear, such as the IsUnmatched bookkeeping behind strict or VerifyAll diagnostics. A test for VerifyNoOtherCalls after ClearInvocations would pin this down.

  4. IMock.ClearInvocations() is source-breaking for external implementers. The PR description notes this. A default interface member would avoid it, if IMock can be implemented outside the repo.

  5. IsOfType() goes through a public OfTypeArg sentinel. It adds a public type hidden from IntelliSense, and nothing checks at compile time that TDerived is assignable to T. IsOfType() on an int parameter compiles and never matches. Consider documenting this, or adding an analyzer later.

  6. Minor. MockEngine.CallBase is EditorBrowsable(Never), while IMockControl.CallBase is public. Check this matches how the other control properties are exposed.

Verdict: I found no blocking correctness issues. I'd like #1 and #2 addressed or answered before merge. The snapshot and docs updates look appropriate.

@greptile-apps

greptile-apps Bot commented Oct 10, 2026 •

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RetriggerConfidence Score: 5/5

[Medium impact] The PR appears safe to merge; no new blocking issue was found.

Summary

Adds ClearCalls(), the PassThrough toggle, and string, type, and reference matchers. The latest fix lets object methods read stored property values consistently.

  • ClearCalls() resets call history without removing mock setups.
  • Class and wrap mocks can skip unconfigured base methods.
  • New matchers check strings, runtime types, and reference identity.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart TD
  A[Call a class mock] --> B[Record the call]
  B --> C{Matching setup?}
  C -->|Yes| D[Run the setup]
  C -->|No| E{PassThrough or object-method scope?}
  E -->|No| F[Use stored value or defaults; throw when required]
  E -->|Yes| G{Stored property value and PassThrough false?}
  G -->|Yes| H[Return stored value]
  G -->|No| I[Run base implementation]
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Reviews (27) · Last reviewed commit: "docs(mocks): Mock.ClearCalls documents i..." · Reviewed by Greptile

Comment thread src/TUnit.Mocks/MockEngine.cs Outdated
Comment thread src/TUnit.Mocks/MockEngine.cs Outdated

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🔇 Additional comments (100)
src/TUnit.Mocks/Arguments/Arg.cs (1)

43-63: LGTM!

Also applies to: 108-119

src/TUnit.Mocks/Arguments/ArgOfT.cs (1)

47-49: LGTM!

src/TUnit.Mocks/IMock.cs (1)

18-20: LGTM!

src/TUnit.Mocks/IMockControl.cs (1)

36-41: LGTM!

src/TUnit.Mocks/Matchers/ReferenceEqualsMatcher.cs (1)

1-19: LGTM!

src/TUnit.Mocks/Matchers/StringMatcher.cs (1)

1-48: LGTM!

src/TUnit.Mocks/Matchers/TypeMatcher.cs (1)

1-20: LGTM!

src/TUnit.Mocks/Mock.cs (1)

229-250: LGTM!

src/TUnit.Mocks/MockEngine.cs (2)

104-117: LGTM!

Also applies to: 390-402, 434-458, 499-508, 575-589, 781-791


404-414: 📐 Maintainability & Code Quality | 🔵 Trivial | 💤 Low value

⚠️ Unverified finding
Verification ran but could not confirm this finding. It is shown for review, not as a verified issue.

Remove the stale XML doc block above TryResolveUnmatchedReturn.

Lines 404-409 describe the old partial/wrap TryHandleCall method. That method is declared further down. The block now sits directly before a second <summary>. The member gets two <summary> elements, and the first one is wrong.

Proposed fix
-    /// <summary>
-    /// Handles a void method call for a partial/wrap mock virtual method.
-    /// Records the call, executes matching setup behavior if found.
-    /// Returns true if a setup was found (caller should NOT call base), false otherwise (caller should call base).
-    /// In Strict mode, throws if no setup matches (no fallthrough to base).
-    /// </summary>
     /// <summary>
     /// Resolves the value for an unmatched call that is not served by a setup: an auto-tracked
src/TUnit.Mocks/MockEngine.Typed.cs (1)

159-176: LGTM!

Also applies to: 206-217, 336-353, 383-394, 513-530, 560-571, 690-707, 737-748, 867-884, 914-925, 1044-1061, 1091-1102, 1221-1238, 1268-1279, 1398-1415, 1445-1456

src/TUnit.Mocks/MockOfT.cs (1)

55-65: LGTM!

src/TUnit.Mocks/MockRepository.cs (1)

116-126: LGTM!

src/TUnit.Mocks/RuntimeStubs/RuntimeStubMock.cs (1)

20-23: LGTM!

src/TUnit.Mocks.SourceGenerator/Builders/MockMembersBuilder.cs (1)

1404-1404: LGTM!

Also applies to: 1425-1430, 1471-1471, 1496-1505

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Abstract_Class_With_Abstract_Indexer.verified.txt (1)

140-143: LGTM!

Also applies to: 183-188

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Clashing_Setter_Kinds_Split_Into_Explicit_Slots.verified.txt (1)

142-145: LGTM!

Also applies to: 185-190

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Class_Constructor_Callback_Initialization_Snapshot.verified.txt (1)

115-118: LGTM!

Also applies to: 158-163, 241-244, 284-289

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Class_Implementing_Static_Abstract_Interface.verified.txt (1)

87-90: LGTM!

Also applies to: 130-135

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Class_With_Constructor_Parameters_Extension_Discovery.verified.txt (1)

122-125: LGTM!

Also applies to: 165-170

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Class_With_Required_Members.verified.txt (1)

69-72: LGTM!

Also applies to: 112-117

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Class_With_Same_Arity_Constructor_Overloads.verified.txt (1)

130-133: LGTM!

Also applies to: 173-178

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Conflict_With_Existing_Type_Falls_Back_To_Generated_Namespace.verified.txt (1)

104-107: LGTM!

Also applies to: 147-152

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Constructor_Emission_And_Overload_Visibility_Snapshot.verified.txt (1)

100-103: LGTM!

Also applies to: 143-148

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Delegates_Returning_Task_And_ValueTask.verified.txt (1)

59-62: LGTM!

Also applies to: 102-107, 197-200, 240-245, 347-350, 390-395, 557-560, 600-605

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/External_Interface_With_Indexer_Static_Extension_Discovery.verified.txt (1)

124-127: LGTM!

Also applies to: 167-172

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/GenerateMock_Attribute_With_Concrete_Class.verified.txt (1)

99-102: LGTM!

Also applies to: 142-147

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Generic_Interface_Extension_Discovery.verified.txt (1)

115-118: LGTM!

Also applies to: 158-163

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Generic_Interface_With_Class_Type_Argument.verified.txt (1)

114-117: LGTM!

Also applies to: 157-162

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Generic_Interface_With_Enum_Type_Argument.verified.txt (1)

91-94: LGTM!

Also applies to: 134-139

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Generic_Interface_With_Multiple_Non_Builtin_Type_Arguments.verified.txt (1)

98-101: LGTM!

Also applies to: 141-146

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Generic_Interface_With_Nested_Generic_Type_Argument.verified.txt (1)

91-94: LGTM!

Also applies to: 134-139

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Generic_Interface_With_Nested_Namespace_Type_Argument.verified.txt (1)

114-117: LGTM!

Also applies to: 157-162

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Grpc_Style_Abstract_Method_Generation_Snapshot.verified.txt (1)

88-91: LGTM!

Also applies to: 131-136

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Hidden_Generic_Interface_Method_Generation_Snapshot.verified.txt (1)

95-98: LGTM!

Also applies to: 138-143

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_Directly_Inheriting_IEnumerable.verified.txt (1)

131-134: LGTM!

Also applies to: 174-179

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_FluentUI_Shape_Nullable_Warnings.verified.txt (1)

104-107: LGTM!

Also applies to: 147-152, 469-472, 512-517

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_Inheriting_IEnumerable_Generic.verified.txt (1)

89-92: LGTM!

Also applies to: 132-137

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_Inheriting_Multiple_Interfaces.verified.txt (1)

130-133: LGTM!

Also applies to: 173-178

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_Inheriting_Nested_Generic_IEnumerable.verified.txt (1)

112-115: LGTM!

Also applies to: 155-160

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Async_Methods.verified.txt (1)

203-206: LGTM!

Also applies to: 246-251

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Dynamic_Async_Result.verified.txt (1)

130-133: LGTM!

Also applies to: 173-178

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Enum_And_Defaultable_Generic_Async_Results.verified.txt (1)

196-199: LGTM!

Also applies to: 239-244

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Events.verified.txt (1)

163-166: LGTM!

Also applies to: 206-211

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Generic_Method_Constraints_On_Explicit_Impl.verified.txt (1)

163-166: LGTM!

Also applies to: 206-211

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Generic_Methods.verified.txt (1)

141-144: LGTM!

Also applies to: 184-189

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_IConvertible_Async_Result.verified.txt (1)

130-133: LGTM!

Also applies to: 173-178

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Inherited_Static_Abstract_Members.verified.txt (1)

119-122: LGTM!

Also applies to: 162-167

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Init_Only_Members_Emits_Init_Accessors.verified.txt (1)

137-140: LGTM!

Also applies to: 180-185

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Keyword_Member_Names.verified.txt (1)

169-172: LGTM!

Also applies to: 212-217

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Keyword_Parameter_Names.verified.txt (1)

143-146: LGTM!

Also applies to: 186-191

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Mixed_Members.verified.txt (1)

220-223: LGTM!

Also applies to: 263-268

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Multiple_Multi_Parameter_Events.verified.txt (1)

183-186: LGTM!

Also applies to: 226-231

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Native_Integer_Async_Results.verified.txt (1)

156-159: LGTM!

Also applies to: 199-204

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_NonSpan_RefStruct_Out_Ref_Parameters.verified.txt (1)

145-148: LGTM!

Also applies to: 188-193

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Nullable_Event.verified.txt (1)

140-143: LGTM!

Also applies to: 183-188

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Nullable_Event_And_Nullable_Args.verified.txt (1)

140-143: LGTM!

Also applies to: 183-188

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Nullable_Event_Args.verified.txt (1)

140-142: LGTM!

Also applies to: 183-188

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Nullable_Reference_Type_Parameters.verified.txt (1)

267-270: LGTM!

Also applies to: 310-315

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Obsolete_DiagnosticId_NamedArgs.verified.txt (1)

93-96: LGTM!

Also applies to: 136-141

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Obsolete_Members.verified.txt (1)

92-95: LGTM!

Also applies to: 135-140, 478-481, 521-526

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Out_Ref_Parameters.verified.txt (1)

127-130: LGTM!

Also applies to: 170-175

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Overloaded_Methods.verified.txt (1)

220-223: LGTM!

Also applies to: 263-268

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Params_Array_Parameter.verified.txt (1)

248-251: LGTM!

Also applies to: 291-296

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Properties.verified.txt (1)

112-115: LGTM!

Also applies to: 155-160

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_RefStruct_Parameters.verified.txt (1)

146-149: LGTM!

Also applies to: 189-194

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Small_Numeric_Async_Results.verified.txt (1)

156-159: LGTM!

Also applies to: 199-204

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Static_Abstract_Members.verified.txt (1)

141-144: LGTM!

Also applies to: 184-189

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Static_Abstract_Transitive_Return_Type.verified.txt (1)

117-120: LGTM!

Also applies to: 160-165

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Tuple_Async_Results.verified.txt (1)

182-185: LGTM!

Also applies to: 225-230

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Type_Parameters_Named_Like_Numeric_Types.verified.txt (1)

164-167: LGTM!

Also applies to: 207-212

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Unconstrained_Nullable_Generic.verified.txt (1)

130-133: LGTM!

Also applies to: 173-178

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Unmanaged_Constrained_Type_Parameter.verified.txt (1)

85-88: LGTM!

Also applies to: 128-133, 260-263, 303-308

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Method_With_More_Params_Than_Func_Action_Arity.verified.txt (1)

111-114: LGTM!

Also applies to: 154-159

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Multi_Interface_Mock_With_Class_Primary_And_Explicit_Impl.verified.txt (1)

84-87: LGTM!

Also applies to: 127-132

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Multi_Interface_Mock_With_Conflicting_Member_Names.verified.txt (1)

91-94: LGTM!

Also applies to: 134-139

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Multi_Interface_Mock_With_Secondary_Setup_Surface.verified.txt (1)

114-117: LGTM!

Also applies to: 157-162

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Partial_Mock_Filters_Internal_Virtual_Members_From_External_Assembly.verified.txt (1)

134-137: LGTM!

Also applies to: 177-182

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Partial_Mock_Filters_Members_With_Internal_Signature_Types.verified.txt (1)

94-97: LGTM!

Also applies to: 137-142

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Partial_Mock_Omits_Inaccessible_Property_Setters.verified.txt (1)

127-130: LGTM!

Also applies to: 170-175

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Partial_Mock_With_Generic_Constrained_Virtual_Methods.verified.txt (1)

146-149: LGTM!

Also applies to: 189-194

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/RefStruct_Events_Generation_Snapshot.verified.txt (1)

275-278: LGTM!

Also applies to: 318-323

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Returning_Async_Method_With_More_Params_Than_Func_Action_Arity.verified.txt (1)

111-114: LGTM!

Also applies to: 154-159

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/SelfEquatable_Generates_EqualsOf_GetHashCodeOf_ToStringOf.verified.txt (1)

143-146: LGTM!

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tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Simple_Interface_With_One_Method.verified.txt (1)

98-101: LGTM!

Also applies to: 141-146

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Static_Extension_Discovery_Via_Qualified_Name.verified.txt (1)

97-100: LGTM!

Also applies to: 140-145

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Static_Extension_Discovery_Without_Mock_Of.verified.txt (1)

114-117: LGTM!

Also applies to: 157-162

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Type_Mocked_Regularly_And_Wrapped.verified.txt (1)

149-152: LGTM!

Also applies to: 192-197

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Wrap_Mock_Filters_Internal_Virtual_Members_From_External_Assembly.verified.txt (1)

22-25: LGTM!

Also applies to: 65-70

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Wrap_Mock_With_Generic_Constrained_Virtual_Methods.verified.txt (1)

36-39: LGTM!

Also applies to: 79-84

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Wrap_Mock_Without_Parameterless_Constructor.verified.txt (1)

16-19: LGTM!

Also applies to: 59-64

docs/docs/migration/mocking/fakeiteasy.md (1)

50-50: LGTM!

Also applies to: 443-443, 454-454

docs/docs/migration/mocking/moq.md (1)

53-53: LGTM!

Also applies to: 461-461, 474-474

docs/docs/migration/mocking/nsubstitute.md (1)

48-48: LGTM!

Also applies to: 446-446, 456-456

tests/TUnit.Mocks.Tests/ClearInvocationsTests.cs (1)

156-183: LGTM!

tests/TUnit.Mocks.Tests/StringAndTypeMatcherTests.cs (1)

21-31: LGTM!

docs/docs/writing-tests/mocking/argument-matchers.md (1)

170-208: 📐 Maintainability & Code Quality

Declare the mock used by the matcher examples.

The examples call mock.Greet(...), but the inspected section does not declare mock before those calls. If each fenced snippet compiles independently, the documentation build cannot resolve mock.

tests/TUnit.Mocks.SourceGenerator.Tests/Snapshots/Multi_Method_Interface.verified.txt (1)

178-181: 🎯 Functional Correctness

No change required.

Reset is intentionally omitted because ICalculator already declares Reset(). The generator filters colliding polyfills to avoid duplicate members. ClearInvocations remains because the interface does not declare that member.

docs/docs/writing-tests/mocking/advanced.md (1)

354-376: 📐 Maintainability & Code Quality

No doc-snippet change is required for target compatibility.

The documentation project targets net10.0 and uses LangVersion preview. Both snippets can use the generated mock members. The absence of a reported script run does not establish a compilation failure.

tests/TUnit.Mocks.Tests/CallBaseTests.cs (1)

115-124: 🎯 Functional Correctness

The test already covers the strict void-call path.

Assert.Throws<T> is synchronous, so no await is required. Run() is a virtual void member, and the void handler throws when the call is unmatched, CallBase is false, and the mock is strict.


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Comment thread src/TUnit.Mocks/IMock.cs Outdated
Comment thread src/TUnit.Mocks/MockEngine.Typed.cs Outdated
@Quattordici

Quattordici commented Oct 10, 2026 •

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Addressed the review comments (fix in e9c2819):

  1. Duplicated CallBase blocks: left as is. The typed arities are deliberately unrolled to avoid allocations in the hot path (the strict message is formatted lazily from the ArgumentStore), and a shared helper would need a delegate or boxing. The shared resolve logic is already in TryResolveUnmatchedReturn.
  2. Setter arg1 / indexers: fixed; only single-argument setters are auto-tracked, with a regression test.
  3. ClearInvocations: it nulls _callArrays, which holds all call records including IsUnmatched. ClearInvocations_Allows_VerifyNoOtherCalls_After_Fresh_Act already pins the VerifyNoOtherCalls behavior.
  4. Default interface member: not possible, TUnit.Mocks targets netstandard2.0, which has no DIM support.
  5. IsOfType: documented that assignability isn't checked at compile time.
  6. CallBase visibility: the engine member is EditorBrowsable(Never) like the other engine hooks; the public surface is IMockControl.CallBase.

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Review of #7018

The feature set is coherent and well scoped: ClearInvocations(), CallBase, and the new matchers. CallBase defaults to true, so existing behaviour is unchanged. ClearInvocations is a small, lock-protected reset of _callArrays that leaves setups, state and subscriptions alone. The docs and migration pages are updated, and the snapshot changes are described as additive.

I could not run the code-review skill (it errored), so this is a manual read of the diff plus spot checks of MockEngine.cs and MockEngine.Typed.cs. I did not build or run the tests.

Checked

  • In the typed TryHandleCallWithReturn overloads, the !CallBase branch comes after setup matching and ApplyMatchedSetup. Configured members therefore still win, and the wrap-mock strict check runs first.
  • Passing autoMockFactory through the typed overloads (it was dropped before) is the right fix, and CallBase = false depends on it.
  • ReferenceEqualsMatcher and StringMatcher validate null arguments up front. TypeMatcher uses Type.IsInstanceOfType, which is AOT-safe.

Suggestions (non-blocking)

  1. Duplication in the typed engine. The same if (!CallBase) { TryResolveUnmatchedReturn … strict throw … defaultValue } block is pasted into eight arities, and the void variants repeat their own block. Next to the existing arity-by-arity pattern this is consistent, but any future change to CallBase semantics must be made 16 times. A small private helper such as HandleNoBase(memberName, store, autoMockFactory, defaultValue, out result) would keep the arities in sync.
  2. IsOfType<TDerived>() is not type-checked at compile time. An unrelated type compiles and silently never matches, as the XML doc admits. The OfTypeArg implicit conversion to Arg<T> is a clever way to infer T, but a debug-time guard would help. In TypeMatcher<T>'s constructor, throw if !typeof(T).IsAssignableFrom(type) && !type.IsAssignableFrom(typeof(T)). This gives users a clear error at setup time rather than a mystery non-match.
  3. Source-breaking interface additions. IMock.ClearInvocations and IMockControl.CallBase are added to public interfaces. The PR notes this for IMock. Please confirm tests/TUnit.PublicAPI snapshots are updated for both, and consider CallBase in the PR's source-breaking note as well.
  4. MockRepository.ClearInvocations iterates the tracked mocks. Check that it uses the same snapshot or lock approach as Reset/VerifyAll, so a concurrent Create does not cause a collection-modified exception.
  5. Docs. Contains(string) and the collection Contains<TCollection,TElement> overloads are easy to confuse, and the docs mention it. A short analyzer or a clearer overload note would be welcome later.

Overall this looks good to me, and the suggestions above are optional.

…alueProvider, validate IsOfType

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
@Quattordici

Quattordici commented Oct 10, 2026 •

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Follow-up in da3aa67:

  1. Duplication: the CallBase = false handling now lives in shared helpers (ThrowIfStrictWithoutBase, ResolveWithoutBase), generic over the struct argument stores so there is no boxing. All arities and the untyped paths call them.
  2. IsOfType: TypeMatcher<T> now throws ArgumentException at setup if the type can never overlap the parameter type (interfaces stay allowed when the other side isn't sealed). Test added.
  3. Public API snapshots: TUnit.Mocks has no baseline in tests/TUnit.PublicAPI; adding the suite is a separate follow-up. CallBase and ClearInvocations are both additive members on public interfaces (source-breaking for external implementers).
  4. MockRepository.ClearInvocations already iterates GetSnapshot() under the lock, same as Reset.
  5. Contains overload docs: left for a later analyzer/doc pass.
    Strict mode now also wins over DefaultValueProvider for CallBase = false (Codex finding). Full TUnit.Mocks.Tests passes on net10.0 (1379/1379).

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Review

I read the diff and the CallBase = false handling in MockEngine.Typed.cs and MockEngine.cs, but didn't build or run the tests. Overall this is a clean, well-scoped feature. No blocking issues.

What looks good

  • CallBase defaults to true, so existing behaviour is unchanged. The check sits after setup matching and call recording, so unmatched calls are still recorded and verifiable.
  • Strict mode still throws, and allowCustomDefault: Behavior != Strict keeps a DefaultValueProvider from masking unexpected strict calls.
  • Fixing the typed TryHandleCallWithReturn overloads to pass autoMockFactory through is a good catch. The old forwarding overloads silently dropped it.
  • TypeMatcher<T> rejects impossible type pairs at setup time, which beats a matcher that silently never matches.
  • The new matchers use no reflection beyond IsInstanceOfType, so they are AOT-safe. Snapshot and docs updates are included.

Suggestions (non-blocking)

  1. IMock.ClearInvocations() is a source-breaking addition for external implementers. The PR description already notes this. If you want to avoid it, a default interface method would work, but only if all target frameworks support DIMs. The netstandard2.0/net8-and-older polyfill path suggests they may not, so keeping it as is looks reasonable.
  2. The !CallBase branch is copy-pasted across 8 arities × 3 paths (setter, void, return). That is consistent with the file's existing style, which is generated-looking. A small private helper, for example HandleUnmatchedWithoutBase(...), would reduce the chance of the arities drifting. Only do this if the file is not already template-generated. If it is, change the template instead.
  3. IsOfType<TDerived>() returns a sentinel OfTypeArg with an implicit conversion to Arg<T>. This is neat for inference. The cost is that an OfTypeArg can't be used where Arg<T> must be inferred from generic context, for example passed to a generic helper. The XML docs mention the compile-time gap, and the setup-time ArgumentException covers the rest. Consider also noting this in the docs.
  4. StringMatcher.Describe() prints Arg.StartsWith(...) via the enum name. That is fine today, but it couples diagnostics to the enum member names. This is minor.

Nice work.

Comment thread src/TUnit.Mocks/Matchers/TypeMatcher.cs Outdated
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Review of ClearInvocations, CallBase and the new matchers. I read the non-snapshot source diff and did not run the tests. The design is clean and the snapshot changes are purely additive.

Issues:

  1. Orphaned XML doc in MockEngine.cs (around L404-414). The 'Handles a void method call for a partial/wrap mock virtual method' summary now sits directly above the new TryResolveUnmatchedReturn summary, so two summary blocks stack on one method. The void-call handler has lost its docs, and IntelliSense shows the wrong description. Move it back onto its method.

  2. Repetition in MockEngine.Typed.cs. The same 'if (!CallBase) { result = ResolveWithoutBase(...); return true; }' and 'if (!setupFound && !CallBase)' blocks are copy-pasted across 8 arities. This matches the file's existing style, so it is not a blocker. Keeping each new branch to one shared helper call would make a future change to CallBase semantics a one-line edit.

  3. IMock.ClearInvocations() is a source-breaking interface addition. The PR description already notes this. Keeping it abstract is defensible, but mention it in the release notes.

  4. IsOfType() returns a sentinel OfTypeArg. The implicit conversion gives nice inference. The cost is that an incompatible type throws ArgumentException at setup time rather than compile time, and 'var a = IsOfType();' yields an unusable value. It is documented, so this is acceptable.

  5. Tests: please confirm coverage for these cases.

  • CallBase=false combined with strict mode and a custom DefaultValueProvider. The code deliberately ignores the provider when strict.
  • ClearInvocations racing with concurrent recording. It nulls _callArrays under Lock, but recording uses a lock-free volatile read path, so an in-flight call could be recorded into the old arrays and lost. That is probably fine, but it should be intentional and documented.

Positives:

  • CallBase defaults to true and costs one volatile bool read, so existing behaviour is preserved.
  • Passing autoMockFactory through the typed TryHandleCallWithReturn overloads fixes a real bug.
  • The matchers are small and AOT-safe, with null handling and Describe() output.
  • The docs and migration tables are updated.

Overall this is good. I would fix item 1 before merge.

…ns race

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
@Quattordici

Quattordici commented Oct 10, 2026 •

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Addressed in 4ddf8d1:

  1. Orphaned doc: moved back onto TryHandleCall; TryResolveUnmatchedReturn keeps its own summary.
  2. Repetition: each arity's CallBase branch is already a single helper call (ThrowIfStrictWithoutBase / ResolveWithoutBase), so a semantics change is a one-place edit.
  3. Source-breaking: the PR description now lists both IMock.ClearInvocations() and CallBase for the release notes.
  4. IsOfType: documented; no change.
  5. Tests: strict + custom provider is covered by CallBase_False_Strict_DefaultValueProvider_Does_Not_Hide_Unexpected_Calls; ClearInvocations_Is_Thread_Safe_With_Concurrent_Calls exists, and ClearInvocations now documents that a call racing with a clear may be lost, by design.

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Review: ClearInvocations, CallBase, string/type matchers

I found no blocking issues. I read the engine, matcher and stub changes in pr-head/. I did not run the build or tests, and I only skimmed the docs, the new test files and the generator output, so the snapshot churn and test results are unchecked.

What I checked

  • ClearInvocations() in MockEngine.cs sets _callArrays = null under the lock. This is the same mechanism Reset() uses, and StoreCallRecordSlow / EnsureCallArrayCapacity rebuild the buffers lazily, so recording after a clear works. Setups, state, auto-tracked values and event subscriptions are left alone, as described. The lost-call race is documented in a remark.
  • CallBase = false is a volatile bool read on the unmatched path only. Matched setups are unaffected.
  • Strict mode still throws even when a custom DefaultValueProvider is set (allowCustomDefault: Behavior != Strict).
  • Passing the auto-mock factory through the typed TryHandleCallWithReturn overloads fixes a real gap that CallBase = false depends on.
  • TypeMatcher has no reflection beyond IsInstanceOfType, so it is AOT-safe. Rejecting types that can never overlap the parameter type fails at setup time instead of silently never matching, which I like.
  • StringMatcher returns false for null and Describe() gives readable failure messages.

Suggestions, all non-blocking

  1. Interface additions. IMock.ClearInvocations and IMockControl<T>.CallBase are source-breaking for external implementers. The PR already calls this out for release notes. If you want to avoid it, C# default interface members (void ClearInvocations() {}) would keep implementers compiling. The cost is a silent no-op for implementers who never override it. Given how few external implementers there should be, the explicit break is probably the more honest choice.
  2. Args-only auto-tracking in TryHandleCall. args.Length == 1 is used to detect a property setter, and indexer setters are skipped on purpose. A short test pinning that (an indexer setter with CallBase=false is not tracked) would stop it regressing, if one doesn't already exist.
  3. Duplication in MockEngine.Typed.cs. The if (!setupFound && !CallBase) and if (!CallBase) blocks are repeated across about 10 arity overloads. That matches the file's existing style. If this file is ever source-generated or templated, this is a good candidate to fold in.
  4. Feature discussion. The checklist says no discussion was opened first. The change is small and additive, so I wouldn't block on it, but the maintainer may want to confirm the CallBase naming and semantics, since they match Moq's API.

Overall this is a clean, well-scoped PR with tests, docs, migration pages and snapshots updated. Looks good to merge.

…to ClearCalls

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
@Quattordici Quattordici changed the title feat(mocks): add ClearInvocations, CallBase toggle and string/type/reference matchers feat(mocks): add ClearCalls, PassThrough toggle and string/type/reference matchers Oct 10, 2026
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Quattordici commented Oct 10, 2026 •

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Addressed in eb41313:

  • Suggestion 2: the indexer case is pinned by PassThrough_False_Does_Not_Auto_Track_Indexer_Setters (an indexer setter with pass-through off is not tracked).
  • Suggestion 3: each arity's branch is already a single shared helper call (ThrowIfStrictWithoutBase / ResolveWithoutBase), and the file is hand-written, not templated, so nothing further to fold.
  • Naming: CallBase is now PassThrough (IMockControl<T>.PassThrough, Mock.GetPassThrough/SetPassThrough) and ClearInvocations is now ClearCalls, matching the existing WasCalled/GetCallsFor vocabulary. The Moq migration page still shows Moq's own CallBase on the Moq side. TUnit.Mocks.Tests (1379) and TUnit.Mocks.SourceGenerator.Tests (170) pass, with snapshots updated.

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I read the diff but didn't build or run the tests, so this is a read-through only. The change is cohesive and the defaults are safe: PassThrough defaults to true, so existing behaviour is unchanged. The snapshot updates and migration docs line up with the new API.

What looks good:

  • ClearCalls() and Reset() have clearly separated semantics, and the docs explain the difference.
  • The matchers are AOT-safe (Type.IsInstanceOfType only), and null handling is consistent.
  • TypeMatcher<T> fails at setup time for types that can never overlap the parameter type, which is better than a silent never-match.
  • The typed TryHandleCallWithReturn overloads now pass autoMockFactory through instead of dropping it. That fixes a latent gap, and the old forwarding overloads are gone.
  • The hot-path cost is one volatile bool read.

Suggestions (non-blocking):

  1. Duplicated PassThrough blocks. The same if (!PassThrough) { ResolveWithoutBase... } and if (!setupFound && !PassThrough) { ThrowIfStrictWithoutBase... } blocks are repeated across 8 arities. Is the file generated? If so, change the generator. If not, factor the shared logic into one non-generic helper so future behaviour changes touch one place and the arities can't drift apart.
  2. IsOfType error timing. OfTypeArg converts implicitly to Arg<T>, so the ArgumentException fires inside the conversion, at setup time. That's acceptable, but the error message should say which parameter position or member was involved. Also check that the nameof(type) argument name is meaningful to a user, since it isn't a parameter of anything they called.
  3. Contains(string) overload ambiguity. The docs note that it differs from Contains<TCollection,TElement>. Add a test that Contains("x") resolves to the string overload when the parameter is string (a string is an IEnumerable<char>), so overload resolution can't regress.
  4. Source-breaking interface members. IMock.ClearCalls and IMockControl<T>.PassThrough are source-breaking for external implementers. The PR already notes this. Default interface members would avoid the break if external implementers are a realistic concern.
  5. PassThrough = false on Mock.Wrap mocks. Strict mode will now throw for unconfigured calls on wrapped instances. That's consistent with the docs, but make sure a test covers wrap plus strict plus PassThrough=false.

Overall this is a solid, additive feature. Approving in spirit; the items above are polish.

…r IsOfType error

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
@Quattordici

Quattordici commented Oct 10, 2026 •

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Addressed in 3e11df2:

  1. Duplication: MockEngine.Typed.cs is hand-written (not generated). Each arity's PassThrough branch is already a single call into ThrowIfStrictWithoutBase / ResolveWithoutBase, so behaviour changes are one-place edits. I kept the helpers generic over the struct argument stores; a fully non-generic version would box every call on this path.
  2. IsOfType: the conversion has no member context, so the message now names both types and says what to use instead. I dropped nameof(type) as the param name, since it isn't something the caller passed. Test: IsOfType_Error_Names_Both_Types.
  3. Contains_With_String_Argument_Resolves_To_The_String_Overload pins the overload binding.
  4. Default interface members: not possible, TUnit.Mocks targets netstandard2.0. The break is called out for the release notes.
  5. PassThrough_False_Strict_Wrap_Mock_Throws_For_Unconfigured_Calls covers wrap + strict + PassThrough = false.
    TUnit.Mocks.Tests passes (1382/1382).

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I read the core engine changes (MockEngine.cs, the typed overloads, MockOfT) and the new matchers. I did not run the tests, and I only skimmed the ~200 lines of duplicated PassThrough branches in MockEngine.Typed.cs.

What looks good

  • PassThrough defaults to true, so existing behaviour is unchanged. The cost on the unmatched class-call path is one volatile read.
  • Strict mode is handled sensibly. A custom DefaultValueProvider can't mask a strict-mode failure (allowCustomDefault: Behavior != Strict). Wrap mocks still throw first in strict mode.
  • ClearCalls takes Lock and drops only _callArrays. The race with lock-free recording is documented and acceptable.
  • Restoring the auto-mock factory on the typed TryHandleCallWithReturn overloads fixes a real gap, and PassThrough = false depends on it.
  • TypeMatcher rejects unrelated types at setup time instead of silently never matching.
  • The generator polyfills, snapshots and docs are updated together.

Suggestions (non-blocking)

  1. Duplication in MockEngine.Typed.cs. The if (!setupFound && !PassThrough) and if (!PassThrough) blocks are repeated for every arity (1–8 args, void and return). A fix to this logic would have to be applied about 16 times. If these overloads come from a template or generator, change it there. If not, move the post-no-setup decision into a single helper that the arity overloads call.
  2. Setter handling in the void path. TryHandleCall stores the value only when args.Length == 1 and the name starts with set_. A method named set_X with one argument is not a realistic case. Still, a short comment on why indexer setters (index plus value) are skipped, or a test that pins that behaviour, would help.
  3. Source-breaking interface members. IMock.ClearCalls and IMockControl<T>.PassThrough are source-breaking for external implementers. The PR description already says so. Please also put it in the release notes.
  4. Process. The checklist says the feature discussion wasn't opened, and Verify-DocSnippets.ps1 wasn't run. Run it before merge, because CI compiles the doc fences with warnings as errors. net8 and net9 were not executed locally either.

Nothing here blocks the merge.

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Actionable comments posted: 2


  • 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @docs/docs/writing-tests/mocking/advanced.md:
- Line 345: Replace the instance-style ClearCalls invocation with the static
Mock.ClearCalls(mock) form because the generated instance member is available
only on net9 and later. Apply this documentation change at
docs/docs/writing-tests/mocking/advanced.md:345,
docs/docs/migration/mocking/fakeiteasy.md:50,
docs/docs/migration/mocking/moq.md:53, and
docs/docs/migration/mocking/nsubstitute.md:48.

Review comments at @src/TUnit.Mocks/Matchers/TypeMatcher.cs:
- Line 29: Update the error guidance in the TypeMatcher constructor to describe
a matcher type that can overlap with the parameter type, covering both
assignability directions.

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Comment thread docs/docs/writing-tests/mocking/advanced.md
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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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