test(zmodel): more validation tests

[ymc9]

Summary by CodeRabbit

• Tests
  • Extended validation coverage for relation field and foreign key optionality consistency.
  • Added test cases for "this" keyword resolution in schema definitions.

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[coderabbitai]

Walkthrough

This PR adds two test suites to the language test infrastructure. The first adds a validation test checking that relation fields and their corresponding foreign keys maintain consistent optionality. The second introduces a new test file validating resolution behavior of the "this" keyword within model relationship contexts.

Changes

Cohort / File(s)	Summary
Attribute application validation test packages/language/test/attribute-application.test.ts	Adds test case validating that relation and foreign key optionality must be consistent; expects error when relation field is optional but foreign key is required.
This keyword resolution test suite packages/language/test/this-resolution.test.ts	New test file with test suite validating "this" keyword resolution behavior in nested optional member access contexts within model schemas.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

• Test code with straightforward assertion patterns and clear validation scenarios
• New file creation is isolated and self-contained
• Validation logic being tested is focused on specific constraint checks

Possibly related PRs

• fix: add a few missing zmodel validation checks #101: Adds the same relation optionality and this-keyword resolution tests targeting datamodel attribute validators.
• fix(zmodel): unique attribute validation issues #383: Exercises attribute-application validation logic that handles attribute argument validation.

Poem

🐰 New tests hop into place,
Checking optionality's grace,
Relations and keys must align,
While "this" resolves oh so fine—
Validation hops make code shine!

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the primary change: adding more validation tests to the zmodel package, which aligns with the two new test cases introduced in the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch test/more-validation

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📜 Recent review details

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between d894f4b and 79dc23c.

📒 Files selected for processing (2)

• packages/language/test/attribute-application.test.ts (1 hunks)
• packages/language/test/this-resolution.test.ts (1 hunks)

🧰 Additional context used

🧠 Learnings (3)

📓 Common learnings

Learnt from: CR
Repo: zenstackhq/zenstack-v3 PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-26T01:55:04.540Z
Learning: Applies to packages/zenstackhq/orm/**/*.test.{ts,tsx} : ORM package tests should include comprehensive client API tests and policy tests

📚 Learning: 2025-11-26T01:55:04.540Z

Learnt from: CR
Repo: zenstackhq/zenstack-v3 PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-26T01:55:04.540Z
Learning: Applies to tests/e2e/**/*.{ts,tsx} : E2E tests should validate real-world schema compatibility with established projects

Applied to files:

• packages/language/test/this-resolution.test.ts
• packages/language/test/attribute-application.test.ts

📚 Learning: 2025-11-26T01:55:04.540Z

Learnt from: CR
Repo: zenstackhq/zenstack-v3 PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-26T01:55:04.540Z
Learning: Applies to tests/**/type*.{ts,tsx} : Ensure TypeScript inference and type coverage are validated through type coverage tests

Applied to files:

• packages/language/test/this-resolution.test.ts
• packages/language/test/attribute-application.test.ts

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (5)

• GitHub Check: Agent
• GitHub Check: CodeQL analysis (javascript-typescript)
• GitHub Check: build-test (20.x, postgresql)
• GitHub Check: build-test (20.x, sqlite)
• GitHub Check: claude-review

🔇 Additional comments (2)

packages/language/test/attribute-application.test.ts (1)

24-47: Good targeted coverage for relation/FK optionality validation

The schema setup (required bar relation with optional barId FK) is minimal and precise for the rule being tested, and the regex assertion focuses on the meaningful part of the error text. This is a solid, low-noise addition to the suite.

packages/language/test/this-resolution.test.ts (1)

4-70: Well-structured positive/negative coverage for this resolution

Pairing the invalid this.cv case (with a precise diagnostic regex) and the valid this.av case gives clear, focused coverage of how this binds in nested relation filters without overcomplicating the schema. The test is readable and should catch regressions in resolution behavior effectively.

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[claude]

Claude finished @ymc9's task —— View job

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Code Review Complete ✅

Reviewing PR #459: test(zmodel): more validation tests

Review Tasks:

• Read and analyze modified test file: packages/language/test/attribute-application.test.ts
• Read and analyze new test file: packages/language/test/this-resolution.test.ts
• Evaluate test quality and coverage
• Check for potential bugs or issues
• Assess performance considerations
• Review security aspects
• Provide feedback on best practices
• Summary and recommendations

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📋 Review Summary

This PR adds valuable validation tests for the ZenStack language parser. The changes are focused and well-structured, adding tests for two important validation scenarios.

🔍 Detailed Analysis

packages/language/test/attribute-application.test.ts (Modified +25 lines)

✅ Positive Aspects:

• Clear test structure: Follows established patterns with descriptive test names
• Good validation coverage: Tests two important edge cases:
  1. before() function misuse in non-post-update policies (lines 5-22)
  2. Relation/foreign key optionality consistency (lines 24-47)
• Consistent with codebase: Uses same testing utilities and patterns as other tests

📝 Observations:

• Test names are descriptive and follow the established convention
• Error message validation is specific and helpful for debugging
• Both tests validate important business logic constraints

packages/language/test/this-resolution.test.ts (New +71 lines)

✅ Positive Aspects:

• Comprehensive test coverage: Tests this keyword resolution in nested relation contexts
• Well-structured schema: Complex but realistic model relationships (A -> B -> C)
• Dual validation approach: Tests both error case and success case
• Clear intent: Test name clearly explains what behavior is being validated

📝 Observations:

• Good edge case coverage: Tests the constraint that this always resolves to the containing model, not nested relation contexts
• Realistic scenario: The test uses a practical access control policy pattern that developers might actually write
• Error message validation: Uses regex pattern matching for more flexible error checking (line 36)

🏗️ Code Quality Assessment

Best Practices ✅

• Consistent import patterns with other test files
• Descriptive test and describe block names
• Proper use of async/await patterns
• Follows established testing utilities (loadSchema, loadSchemaWithError)

Test Structure ✅

• Clear arrange-act-assert pattern
• Meaningful test data with realistic model schemas
• Appropriate error message validation
• Good separation of concerns between test cases

Documentation ⚠️

• Tests are self-documenting through names and schemas
• Consider adding brief comments for complex validation rules if this becomes a pattern

🔧 Performance Considerations

✅ Efficient:

• Tests use lightweight schema validation (no database operations)
• Temporary file creation is properly isolated using crypto.randomUUID()
• No expensive operations or resource leaks

🔒 Security Assessment

✅ Secure:

• No security concerns - these are pure validation tests
• Temporary files use secure random naming
• No sensitive data or credentials in test schemas
• Tests validate security-relevant access control syntax

📊 Test Coverage Impact

✅ Positive Impact:

• New validation scenarios: Adds coverage for before() function validation and relation optionality
• this keyword resolution: Completely new test coverage for an important language feature
• Error path testing: Good balance of positive and negative test cases

🚀 Recommendations

Immediate (Optional enhancements):

1. Consider adding more edge cases for the this resolution test:

   // Test this.field in different policy contexts (@@deny, @@validate, etc.)

2. Test description enhancement for attribute-application.test.ts:

   it('rejects before() function in non-post-update policies', async () => {
   // More specific about the before() function aspect

Future Considerations:

• Consider parameterized tests if more validation rules are added
• Potential for test data factories if schemas become more complex

✅ Final Assessment

Overall Quality: Excellent 🌟

This is a high-quality addition to the test suite that:

• ✅ Follows established patterns and conventions
• ✅ Tests important edge cases and validation rules
• ✅ Has no apparent bugs or issues
• ✅ Provides good coverage for ZModel language validation
• ✅ Is secure and performant

Recommendation: Approve - These tests add valuable validation coverage with no concerns identified.

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[Copilot]

Pull request overview

This PR adds more validation tests to the zmodel language package, focusing on two specific validation scenarios: this keyword resolution in nested collection filters and relation/foreign key optionality consistency.

Key changes:

• Added a new test file to validate that the this keyword always resolves to the containing model, even in deeply nested collection filter expressions
• Extended existing attribute application validation tests to cover relation and foreign key optionality consistency validation

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/language/test/this-resolution.test.ts	New test file validating that this keyword correctly resolves to the containing model in nested collection filters and properly rejects invalid field references
packages/language/test/attribute-application.test.ts	Added test case for relation/foreign key optionality mismatch validation

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