feat(errors): add comprehensive error handling tests and documentation #123
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WalkthroughThe changes expand and clarify documentation for error handling utilities, particularly around temporary and timeout errors, without altering any logic. Comprehensive new tests are added to cover error construction, wrapping, coalescing, and predicate functions, ensuring correct behaviour and interface compatibility. Only comments and tests are modified; no production code changes occur. Changes
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🚧 Files skipped from review as they are similar to previous changes (2)
🧰 Additional context used📓 Path-based instructions (5)**/*.goInstructions used from: Sources:
**/*_test.goInstructions used from: Sources:
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**/*.{md,go}Instructions used from: Sources:
🧠 Learnings (2)📓 Common learningserrors_test.go (4)🔇 Additional comments (10)
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🧹 Nitpick comments (1)
errors.go (1)
293-308: Use British English spelling: "behaviour" instead of "behavior".The documentation should use British English as per the coding guidelines.
-// It checks if the error implements Temporary() bool or IsTemporary() bool -// interfaces directly, without traversing wrapped error chains. +// It checks if the error implements Temporary() bool or IsTemporary() bool +// interfaces directly, without traversing wrapped error chains.
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README.md(1 hunks)errors.go(3 hunks)errors_test.go(1 hunks)
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**/*
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- AGENT.md
!**/*.{exe,bin,dll,so,o,a,zip,tar,gz,bz2,7z,png,jpg,jpeg,gif,ico,svg,pdf,mp3,mp4,avi,flac,ogg,webm,wasm} !.git/** !.hg/** !.svn/**
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- AGENT.md
**/*.md
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📄 CodeRabbit Inference Engine
- AGENT.md
**/*.{md,go}
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- AGENT.md
README.md
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- AGENT.md
**/*.go
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- AGENT.md
**/*_test.go
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- AGENT.md
🧠 Learnings (4)
📓 Common learnings
Learnt from: CR
PR: darvaza-proxy/core#0
File: AGENT.md:0-0
Timestamp: 2025-07-18T16:39:19.390Z
Learning: Applies to README.md : Update `README.md` to reflect significant changes in functionality or API.
README.md (3)
Learnt from: CR
PR: darvaza-proxy/core#0
File: AGENT.md:0-0
Timestamp: 2025-07-18T16:39:19.390Z
Learning: Applies to README.md : Update `README.md` to reflect significant changes in functionality or API.
Learnt from: amery
PR: darvaza-proxy/core#82
File: errors.go:22-23
Timestamp: 2024-10-11T13:59:15.993Z
Learning: `ErrNilReceiver`, defined in `errors.go`, is intended for use by other packages even if it's not used within the current codebase.
Learnt from: CR
PR: darvaza-proxy/core#0
File: AGENT.md:0-0
Timestamp: 2025-07-18T16:39:19.357Z
Learning: Applies to **/*.go : Use extensive Go 1.23+ generics for type-safe utilities.
errors.go (1)
Learnt from: CR
PR: darvaza-proxy/core#0
File: AGENT.md:0-0
Timestamp: 2025-07-18T16:39:19.390Z
Learning: Applies to **/*_test.go : Comprehensive coverage for generic functions is expected.
errors_test.go (4)
Learnt from: CR
PR: darvaza-proxy/core#0
File: AGENT.md:0-0
Timestamp: 2025-07-18T16:39:19.390Z
Learning: Applies to **/*_test.go : Comprehensive coverage for generic functions is expected.
Learnt from: CR
PR: darvaza-proxy/core#0
File: AGENT.md:0-0
Timestamp: 2025-07-18T16:39:19.390Z
Learning: Applies to **/*_test.go : Table-driven tests are preferred.
Learnt from: CR
PR: darvaza-proxy/core#0
File: AGENT.md:0-0
Timestamp: 2025-07-18T16:39:19.357Z
Learning: Applies to **/*.go : Use extensive Go 1.23+ generics for type-safe utilities.
Learnt from: CR
PR: darvaza-proxy/core#0
File: AGENT.md:0-0
Timestamp: 2025-07-18T16:39:19.390Z
Learning: Applies to **/*_test.go : Helper functions like `S[T]()` create test slices.
🔇 Additional comments (13)
errors.go (3)
325-341: Excellent documentation for IsTemporary.The documentation clearly explains the recursive nature of the function, the interfaces it checks, and provides helpful usage guidance.
346-363: Well-structured documentation for CheckIsTimeout.The documentation clearly distinguishes this function from CheckIsTemporary and provides helpful context about the relationship between timeout and temporary errors.
380-396: Clear and comprehensive documentation for IsTimeout.The documentation effectively explains the recursive error chain traversal and provides practical usage guidance for distinguishing timeout errors.
README.md (1)
215-228: Excellent documentation improvements for error handling utilities.The expanded documentation clearly explains the dual interface support, distinguishes between recursive and non-recursive checks, and maintains consistency with the enhanced function documentation in
errors.go.errors_test.go (9)
74-130: Comprehensive test coverage for QuietWrap.Excellent table-driven test implementation with good coverage of edge cases including nil errors, empty formats, and various formatting scenarios.
132-173: Well-structured tests for CoalesceError.The tests effectively cover all scenarios including edge cases with clear, descriptive test names.
175-211: Thorough test coverage for IsError.Tests effectively validate recursive error checking including wrapped errors and various target configurations.
213-286: Excellent test coverage for TemporaryError constructors.The tests thoroughly validate both modern and legacy interface implementations, ensuring backward compatibility.
288-295: Good defensive testing for nil receivers.Important test case that ensures methods handle nil receivers gracefully without panicking.
297-339: Comprehensive tests for CheckIsTemporary.Effectively tests both return values and covers all error types including the fallback to CheckIsTimeout behaviour.
341-382: Well-designed tests for recursive IsTemporary.Good inclusion of wrapped error test case to verify the recursive behaviour documented in the function.
384-426: Thorough tests for CheckIsTimeout.Maintains consistency with CheckIsTemporary tests and properly validates the dual return value behaviour.
428-469: Complete test coverage for recursive IsTimeout.Effectively distinguishes between temporary and timeout errors while validating recursive error chain traversal.
Add complete test coverage for error utility and checking functions: Error Utilities: - QuietWrap: 6 test cases covering nil error, formatting, and wrapping - CoalesceError: 8 test cases covering first-non-nil error selection - IsError: 9 test cases covering error matching and unwrapping - NewTimeoutError/NewTemporaryError: 6 test cases with interface methods - TemporaryError: nil receiver behavior testing Error Checking Functions: - CheckIsTemporary: 4 test cases covering temporary error detection - IsTemporary: 5 test cases including wrapped error recursion - CheckIsTimeout: 4 test cases covering timeout error detection - IsTimeout: 5 test cases including wrapped error recursion Introduces factory functions (quietWrapTest, coalesceErrorTest, temporaryErrorTest, newCheckIsTemporaryTestCase, etc.) for clean test syntax and uses S() helper consistently. Achieves 100% coverage for QuietWrap, CoalesceError, IsError, NewTimeoutError, NewTemporaryError, IsTemporary, and IsTimeout. CheckIsTemporary and CheckIsTimeout reach 80% coverage. Signed-off-by: Alejandro Mery <amery@apptly.co>
Improve Go documentation for error checking functions to match the comprehensive style used in other well-documented modules: Error Checking Functions Enhanced: - CheckIsTemporary: detailed interface priority order, return value semantics - IsTemporary: comprehensive recursive traversal explanation, usage guidance - CheckIsTimeout: timeout-specific interface documentation, edge case behavior - IsTimeout: recursive timeout detection with practical usage examples Documentation improvements include: - Detailed function purpose and behavior descriptions - Interface examination priority order explanations - Clear return value semantics with (is, known) tuple documentation - Comprehensive edge case handling (nil errors, unknown interfaces) - Practical usage guidance for retry logic and error handling - Technical implementation details (unwrapping patterns, traversal methods) README.md improvements: - Enhanced error section descriptions with detailed function behavior - Clarified recursive vs single-level checking differences - Added return value explanations and interface implementation details - Improved consistency with other module documentation styles Brings error checking function documentation to the same comprehensive standard as other well-documented modules like stack.go, context.go, and splithostport.go.
Summary
Changes
Test Coverage Improvements
Documentation Enhancements
Test Plan
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