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Feature Request: Add ErrorIs and ErrorAs assertion helpers for Go 1.13+ error wrapping

Feature Request: Add ErrorIs and ErrorAs assertion helpers for Go 1.13+ error wrapping: a task in LegoFlow-SWE (Harbor dataset). Currently, testing code that uses Go’s error wrapping ( fmt.Errorf("%w", ...) , errors.Is , errors.As ) forces us to write verbose, unhelpful assertions:

The task

Currently, testing code that uses Go’s error wrapping (`fmt.Errorf("%w", ...)`, `errors.Is`, `errors.As`) forces us to write verbose, unhelpful assertions:

Part of Lego-X/LegoFlow-SWE.