lsp-test-correlation

Requires the agent-lsp MCP server.

lsp-test-correlation

Discover which tests cover a source file, then run only those tests. Faster than running the full suite when you've changed one or two files and want targeted feedback.

When to use

• After editing a source file: "Which tests do I need to run for this change?"
• Before committing: run only the tests that cover what you touched
• Debugging a failure: find which test file corresponds to a broken source file
• Code review: understand what test coverage exists for a file before merging

Use /lsp-verify instead when you want to run the full suite and check all three layers (diagnostics + build + tests). Use this skill when you want fast, scoped test execution.

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Workflow

Step 1 — Find correlated test files

Call get_tests_for_file for each edited source file:

mcp__lsp__get_tests_for_file({ "file_path": "/abs/path/to/source.go" })

Returns the test files that correspond to the source file. For multiple edited files, call once per file.

If no test files are returned: the source file may have no dedicated test file, or the mapping is not resolvable (e.g. integration tests in a separate directory). See Step 2 for fallback.

Step 2 — Enumerate test functions (fallback or enrichment)

If get_tests_for_file returns test files, use find_symbol to list the test functions defined in those files:

mcp__lsp__find_symbol({ "query": "Test" })

Filter results to the correlated test files from Step 1. This gives you the specific test function names to run rather than the whole test file.

Fallback (no test files found): query find_symbol for test functions that contain the changed symbol's name:

mcp__lsp__find_symbol({ "query": "Test<ChangedFunctionName>" })

This catches cases where get_tests_for_file misses indirect coverage.

Step 3 — Report the correlation map

Before running, report what was found:

## Test correlation for <file>

Source file: internal/tools/analysis.go
Test files:
  → internal/tools/analysis_test.go
     Tests: TestHandleGetCodeActions, TestHandleGetCompletions, TestHandleGetDocumentSymbols

No correlated test files found for: internal/lsp/normalize.go
  → Fallback: TestNormalizeCompletion, TestNormalizeDocumentSymbols (from workspace symbol search)