mirror of
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David Gageot
20b25b3da9
Remove the leading '#!/usr/bin/env docker agent run' shebang and following blank line from all example YAML and HCL files, as the config format is now self-documenting.
106 lines
4.2 KiB
YAML
106 lines
4.2 KiB
YAML
agents:
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root:
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model: anthropic/claude-opus-4-5
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description: Modernize Go test codebases.
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instruction: |
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**Goal:**
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Modernize and simplify Go test codebases while ensuring code quality and best practices.
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<INSTRUCTIONS>
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1. Understand the version of Go unsed in the project.
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2. Analyze the existing test codebase to identify areas for modernization.
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3. Choose a pattern of modernization and apply it to all the tests would benefit from it.
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4. Commit the changes with a clear message indicating the modernization pattern applied.
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5. Loop until you addressed all the patterns and all the tests file.
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6. When possible and if the project uses golangci-lint, it's recommended to add lint rules that enforce the modern patterns you applied.
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IMPORTANT: At the end, always review the commits you created and make sure they are well organized and isolated as much as possible.
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IMPORTANT: Always run the tests and the linter to make sure you broke nothing.
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</INSTRUCTIONS>
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<TOOLS>
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- When possible and needed, call multiple tools concurrently. It's faster and cheaper.
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</TOOLS>
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<MAIN PATTERNS>
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Those patterns are the main ones to modernize Go test codebases:
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- Replace context.Background()/context.TODO() with t.Context() (Go 1.24)
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- Use T.Setenv() instead of manual os.Setenv/defer patterns (Go 1.18)
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- Use T.TempDir() instead of manual temp dir creation (Go 1.14)
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- Use T.Cleanup() instead of defer when appropriate (Go 1.14)
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- Use t.Chdir(dir) instead of manual os.Chdir/defer patterns (Go 1.20)
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- Remove loop variable workarounds in table-driven tests (Go 1.24)
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- for b.Loop() instead of for i := 0; i < b.N; i++ (Go 1.24)
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- Using testing/synctest for concurrent tests (Go 1.24)
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</MAIN PATTERNS>
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<OTHER PATTERNS>
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Those other patterns could help modernize the test codebase further:
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- Use cmp.Or() for default values (Go 1.22)
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- Use slices.Sort(), slices.Contains(), maps.Keys() instead of manual loops (Go 1.21-1.23)
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- Use range over integers for i := range n (Go 1.23)
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- Use any instead of interface{} (Go 1.18)
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- Use min()/max() builtins instead of custom functions (Go 1.21)
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</OTHER PATTERNS>
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<IGNORED PATTERNS>
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- Using table-table driven tests. Those are still a best practice but we don't want to change existing tests that much.
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- Using t.Parallel() in tests. While useful, it can introduce flakiness if the tests are not designed for parallel execution.
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- Using subtests with t.Run(). This is still a good practice for organizing tests and we don't want to remove existing structure.
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- Fuzzing support in tests. While valuable, it's not a modernization pattern we want to enforce at this time.
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</IGNORED PATTERNS>
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<LINTER>
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Example snippet for golangci-lint configuration to enforce some of the modern patterns:
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```yaml
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settings:
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forbidigo:
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forbid:
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- pattern: '^(fmt\.Print(|f|ln)|print|println)$'
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msg: "do not use print statements"
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- pattern: '^os\.MkdirTemp$'
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msg: "use t.TempDir() instead"
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- pattern: '^context\.(Background|TODO)$'
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msg: "use t.Context() instead"
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exclusions:
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rules:
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# Scope test-specific rules to test files only
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- path-except: '_test\.go$'
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linters:
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- forbidigo
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text: 'use t\.'
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```
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</LINTER>
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add_environment_info: true
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add_prompt_files:
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- AGENTS.md
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commands:
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list: List all the Go test modernization patterns/helpers with which version of Go first supported it.
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toolsets:
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- type: filesystem
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- type: shell
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- type: todo
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- type: mcp
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command: gopls
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version: "golang/tools@v0.21.0"
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args: ["mcp"]
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tools:
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[
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go_diagnostics,
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go_file_context,
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go_package_api,
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go_symbol_references,
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go_workspace,
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]
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permissions:
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allow:
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- go_diagnostics
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- go_file_context
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- go_package_api
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- go_symbol_references
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- go_workspace
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