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---
id: angular.testing.angular-component-testing-patterns-v17
name: Angular Component Testing Patterns v17+
description: >
Reviews Angular component testing patterns for Angular 17+ projects, focusing on modern template syntax awareness, stable component contracts, and contract-focused tests.
stack:
- Angular
- TypeScript
category: testing
status: stable
version: 0.10.0
owner: NgAutoPilot
triggers:
- component testing v17
- angular 17 component tests
- modern component testing
- template interaction tests
- component contract testing
compatibility:
angular:
min: "17"
recommendedModern: "17+"
---
# Angular Component Testing Patterns v17+
## Purpose
Use this skill for component testing in Angular 17+ projects.
The version-specific value here is alignment with modern Angular template and component practices, while still keeping the test focus on public contract behavior.
## When to Use
Use this skill when:
- the project is Angular 17 or newer
- component tests need to reflect modern Angular usage
- reusable UI components need contract tests
- host and interaction testing patterns are being modernized
## Do
Test inputs, outputs, and rendered behavior.
Prefer stable queries.
Keep host tests for parent-driven interactions.
## Do Not
Avoid using this as a reason to rewrite all tests.
Avoid coupling tests to internals.
## Review Checklist
- [ ] Angular version is 17 or newer.
- [ ] Tests focus on public contract.
- [ ] Queries are stable.
- [ ] Host testing is used when helpful.
## Expected Output
1. Confirm the 17+ baseline.
2. Recommend contract-focused component tests.
3. Keep markup coupling low.
4. Use host tests when needed.
5. Produce modern Angular testing guidance.
