Fix: Go Test Not Working, Tests Not Running, Failing Unexpectedly, or Coverage Not Collected
How to fix Go testing issues, test function naming, table-driven tests, t.Run subtests, httptest, testify assertions, and common go test flag errors.
Tag: best-practices
15 articles
RSSFix: Java Record Not Working — Compact Constructor Error, Serialization Fails, or Cannot Extend
How to fix Java record issues — compact constructor validation, custom accessor methods, Jackson serialization, inheritance restrictions, and when to use records vs regular classes.
Fix: Kotlin Sealed Class Not Working — when Expression Not Exhaustive or Subclass Not Found
How to fix Kotlin sealed class issues — when exhaustiveness, sealed interface vs class, subclass visibility, Result pattern, and sealed classes across modules.
Fix: Python contextmanager Not Working — GeneratorExit, Missing yield, or Cleanup Not Running
How to fix Python context manager issues — @contextmanager generator, __enter__ and __exit__, exception handling inside with blocks, async context managers, and common pitfalls.
Fix: Python Protocol Not Working — Type Checker Rejects Compatible Class, runtime_checkable Fails, or Protocol Not Recognized
How to fix Python Protocol class issues — structural subtyping vs nominal typing, runtime_checkable, Protocol inheritance, TypeVar constraints, and common mypy/pyright errors with Protocol.
Fix: Rust Error Handling Not Working — ? Operator, Custom Error Types, and thiserror/anyhow
How to fix Rust error handling issues — the ? operator, From trait for error conversion, thiserror for custom errors, anyhow for applications, and Box<dyn Error> pitfalls.
Fix: TypeScript Conditional Types Not Working — infer Not Extracting, Distributive Behavior Unexpected, or Type Resolves to never
How to fix TypeScript conditional type issues — infer keyword usage, distributive conditional types, deferred evaluation, naked type parameters, and common conditional type patterns.
Fix: TypeScript Discriminated Union Error — Property Does Not Exist or Narrowing Not Working
How to fix TypeScript discriminated union errors — type guards, exhaustive checks, narrowing with in operator, never type, and common patterns for tagged unions.
Fix: TypeScript Template Literal Type Error — Type Not Assignable or Inference Fails
How to fix TypeScript template literal type errors — string combination types, conditional inference, Extract and mapped types with template literals, and common pitfalls.
Fix: Go Generics Type Constraint Error, Does Not Implement or Cannot Use as Type
How to fix Go generics errors, type constraints, interface vs constraint, comparable, union types, type inference failures, and common generic function pitfalls.
Fix: Python pathlib Not Working — Path Object Errors, Joins, and Common Pitfalls
How to fix Python pathlib issues — TypeError with string concatenation, path joining, glob patterns, reading files, cross-platform paths, and migrating from os.path.
Fix: Go Error Handling Not Working — errors.Is, errors.As, and Wrapping
How to fix Go error handling — errors.Is vs ==, errors.As for type extraction, fmt.Errorf %w for wrapping, sentinel errors, custom error types, and stack traces.
Fix: Go Panic Not Recovered, panic/recover Patterns and Common Pitfalls
How to handle Go panics correctly, recover() placement, goroutine panics, HTTP middleware recovery, defer ordering, distinguishing panics from errors, and when not to use recover.
Fix: Python asyncio.gather Not Handling Errors — Exceptions Swallowed or All Tasks Cancelled
How to fix asyncio.gather error handling — return_exceptions parameter, partial failures, task cancellation propagation, TaskGroup alternatives, and exception isolation patterns.
Fix: Python Decorator Not Working — Function Signature Lost or Decorator Not Applied
How to fix Python decorator issues — functools.wraps, decorator factories with arguments, class decorators, stacking order, async function decorators, and common pitfalls.