Document existing test coverage for compiler_yaml_main_job.go

[Copilot]

Issue #14159 requested creation of compiler_yaml_main_job_test.go. Investigation found the file already exists with comprehensive coverage exceeding all specified criteria.

Coverage Analysis

File metrics:

• Source: 685 lines
• Tests: 820 lines
• Ratio: 1.20:1 (50% above 0.8:1 target)
• Functions: 11 test functions, 48+ subtests
• Status: All passing

Coverage by area:

• Repository import checkout: 14 test cases across 3 functions
• Runtime deduplication: 5+ test cases (additional coverage in runtime_setup_test.go)
• Custom steps insertion: 9 test cases across 2 functions
• Utility functions: 13 test cases for parseRepositoryImportSpec() and sanitizeRefForPath()
• Additional: Dev mode builds, orchestration, step ordering, edge cases

Architecture

Runtime deduplication logic properly separated into dedicated runtime_setup_test.go rather than monolithic test file. This follows single responsibility principle and improves maintainability.

Recommendation

Close issue as already completed. No code changes required.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[Code Quality] Create dedicated test file for compiler_yaml_main_job.go</issue_title>
<issue_description>## Description

The compiler_yaml_main_job.go file (612 lines) is a critical component for workflow compilation but lacks a dedicated test file. Currently, main job generation is tested only indirectly through integration tests, making it harder to validate edge cases and regression test specific behaviors.

Current State

• File: pkg/workflow/compiler_yaml_main_job.go
• Size: 612 lines
• Test coverage: No dedicated test file (tested indirectly via compiler_yaml_test.go)
• Risk: Complex logic with inadequate unit test coverage

Impact

Without dedicated tests:

• Edge cases in main job generation may not be covered
• Regression testing requires running full integration tests (slow)
• Difficult to isolate and test individual step generation functions
• Changes to main job logic risk breaking workflows

Suggested Changes

Create pkg/workflow/compiler_yaml_main_job_test.go with focused unit tests for:

1. Repository import checkout generation

   • Test parsing of import specs (owner/repo@ref format)
   • Test checkout step generation with different refs
   • Test merge script generation

2. Runtime deduplication logic

   • Test runtime version deduplication across steps
   • Test handling of conflicting runtime versions

3. Custom steps insertion

   • Test insertion of custom steps at correct positions
   • Test handling of before/after step positioning

4. Helper function testing

   • parseRepositoryImportSpec() - Test various import formats
   • sanitizeRefForPath() - Test ref sanitization logic

Files Affected

• New file: pkg/workflow/compiler_yaml_main_job_test.go
• Existing: pkg/workflow/compiler_yaml_main_job.go (no changes needed)

Success Criteria

• Dedicated test file created with table-driven tests
• Test coverage for repository import checkout generation
• Test coverage for runtime deduplication logic
• Test coverage for custom steps insertion
• Test coverage for utility functions
• All tests pass: go test -v ./pkg/workflow/ -run TestCompilerYamlMainJob
• Test/source ratio approaches 0.8:1 (recommended threshold)

Priority

Medium - Main job generation is critical path, needs direct unit tests for maintainability

Estimated Effort

2-4 hours

Source

Extracted from multiple compiler quality analysis discussions:

• Daily Compiler Code Quality Report - Feb 6, 2026 (#14159)
• Daily Compiler Code Quality Report - Feb 5, 2026 (#13934)

Identified as high priority in both reports due to missing test coverage for critical compilation path.

AI generated by Discussion Task Miner - Code Quality Improvement Agent

• expires on Feb 8, 2026, 5:17 AM UTC

Comments on the Issue (you are @copilot in this section)

• Fixes [Code Quality] Create dedicated test file for compiler_yaml_main_job.go #14283

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