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Tests validate that the parse layer catches incorrect type comparisons,
assignments, outputs, and function arguments. Includes 104 tests covering:

  • Comparison type mismatches (INTEGER vs STRING, etc.)
  • IS/IS NOT operator validation (null/boolean only)
  • IN operator array element type checking
  • String function argument types
  • Numeric function argument types
  • Date function argument types
  • Array/map function argument types
  • COALESCE type uniformity
  • CASE expression type consistency
  • Arithmetic operation types
  • Custom type/trait validation

30 tests are marked xfail to identify gaps in type checking for phase two.

https://claude.ai/code/session_01Jp68nivJuqBC9qFP6aCK2X

Tests validate that the parse layer catches incorrect type comparisons,
assignments, outputs, and function arguments. Includes 104 tests covering:
- Comparison type mismatches (INTEGER vs STRING, etc.)
- IS/IS NOT operator validation (null/boolean only)
- IN operator array element type checking
- String function argument types
- Numeric function argument types
- Date function argument types
- Array/map function argument types
- COALESCE type uniformity
- CASE expression type consistency
- Arithmetic operation types
- Custom type/trait validation

30 tests are marked xfail to identify gaps in type checking for phase two.

https://claude.ai/code/session_01Jp68nivJuqBC9qFP6aCK2X
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codecov bot commented Feb 4, 2026

Codecov Report

✅ All modified and coverable lines are covered by tests.

Flag Coverage Δ
ubuntu-latest-py3.11 91.09% <ø> (+0.04%) ⬆️
ubuntu-latest-py3.12 91.11% <ø> (+0.04%) ⬆️
ubuntu-latest-py3.13 91.11% <ø> (+0.04%) ⬆️
windows-latest-py3.11 91.09% <ø> (+0.04%) ⬆️
windows-latest-py3.12 91.11% <ø> (+0.04%) ⬆️
windows-latest-py3.13 91.11% <ø> (+0.04%) ⬆️

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see 4 files with indirect coverage changes

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