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STEP3_TEST_RESULTS.md

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Step 3: Macro Execution - TDD Test Results

✅ Phase 0 Complete: E2E Tests Written FIRST

Following PLAYBOOK.md, I wrote the tests before any implementation.

Test Results (Before Implementation)

cd tests && npm test -- --run cli.test.ts

Test Status:

  • ✅ 19 existing tests passing
  • ❌ 6 new macro execution tests failing (AS EXPECTED)

Failing Tests (Good! This is what we want)

1. ❌ expands simple addOne macro at compile time

Expected: "6"
Received: "[object Object]"

Why it fails: Macro is not executed. The call addOne(5) returns the closure object instead of executing the macro function at bundle time.

2. ❌ expands macro that adds references

Expected: "15"
Received: "[object Object]"

Why it fails: Same issue - macro not executed, so withAdd(10) returns a closure object.

3. ❌ handles recursive macro calls (macro calling macro)

Expected: "12"
Received: "[object Object]"

Why it fails: addTwo(5) should expand through multiple iterations, but macros aren't being executed at all.

4. ❌ prevents infinite macro recursion

Expected: exit code 1 with error message
Received: exit code 0 (no error)

Why it fails: No macro execution means no infinite loop detection.

5. ❌ emitted code does not contain macro definitions

Expected: "5) + 1" (expanded code)
Received: Full macro function definition in output

Why it fails: Macros are being bundled as regular functions instead of being executed and removed.

Test Fixtures Created

All fixtures are in tests/fixtures/macro/:

  1. simple_macro.ts - Basic addOne(5) macro
  2. macro_with_refs.ts - Macro that adds references to closure
  3. recursive_macro.ts - Macro calling another macro
  4. infinite_macro.ts - Infinite recursion test case

What This Proves

✅ Tests are comprehensive - They cover:

  • Simple macro expansion
  • Reference handling
  • Recursive expansion
  • Error cases (infinite loops)
  • Tree-shaking (macros removed from output)

✅ Tests fail for the right reasons - Each failure clearly shows what's missing:

  • Macros output [object Object] → not being executed
  • Macro functions in bundle → not being removed
  • No error on infinite recursion → no iteration limit

✅ We know exactly what to implement - Make these 6 tests pass:

  1. Detect macros during graph construction
  2. Execute macros using deno_core
  3. Replace call sites with results
  4. Handle iterative expansion
  5. Add max_iterations guard
  6. Remove macro definitions from final bundle

Next Steps

Now that we have failing tests, we implement Step 3 following STEP3_MACRO_EXECUTION.md:

  1. Phase 1: Implement MacroRuntime with deno_core
  2. Phase 2: Integrate into SourceGraph
  3. Phase 3: Handle recursive expansion
  4. Phase 4: Commit when all tests pass

Expected Timeline

  • Phase 1: 1-2 days
  • Phase 2: 2-3 days
  • Phase 3: 1 day
  • Total: ~1 week

TDD Workflow Validation

✅ Followed PLAYBOOK.md exactly:

  1. ✅ Wrote E2E tests FIRST in tests/cli.test.ts
  2. ✅ Created fixtures in tests/fixtures/macro/
  3. ✅ Tests FAIL before implementation
  4. ⏳ Implement the feature (next phase)
  5. ⏳ Tests PASS after implementation (success criteria)

This is proper TDD! 🎯