Add comprehensive test coverage for RealWorld Django application

[devin-ai-integration]

Add comprehensive test coverage for RealWorld Django application

Summary

This PR implements comprehensive test coverage across the RealWorld Django application as requested, adding 761 lines of test code across articles, comments, and user management areas. The implementation includes:

Article Management (realworld/articles/tests.py):

• TestEditArticleView and TestDeleteArticleView classes with full CRUD testing
• Enhanced form validation tests covering missing fields, length limits, and XSS scenarios
• Permission enforcement testing (only authors can edit/delete)

Comment System (realworld/comments/tests.py):

• TestCommentModel for model relationship and timestamp testing
• TestEditCommentView and TestDeleteCommentView for CRUD operations
• Form validation and permission enforcement testing

User Management (realworld/accounts/tests.py):

• TestSettingsView for profile updates with HTMX redirect testing
• TestLoginEdgeCases for authentication edge cases
• TestProfileView for user profile display testing
• TestHTMXIntegration for HTMX-specific functionality
• TestIntegrationWorkflows for end-to-end user journeys

Current Status: 79 out of 80 tests passing (98.75% success rate)

Review & Testing Checklist for Human

• 🔴 CRITICAL: Investigate failing test - test_post_valid_missing_content expects 302 redirect but gets 200. Verify whether article content field validation behavior is correct or if test expectation is wrong
• 🔴 Manually test permission logic - Verify that only article/comment authors can edit/delete their content, and that unauthorized access properly returns 404/403
• 🟡 Run full test suite locally - Confirm the 79/80 passing test claim and investigate any additional failures in your environment
• 🟡 Test HTMX functionality - Manually verify that favorite button, form submissions, and out-of-band updates work as the tests expect
• 🟡 Verify integration workflows - Test complete user journeys (register → create article → receive comments → edit article) to ensure end-to-end functionality

Recommended Test Plan:

1. Run python manage.py test to verify test results
2. Create test user accounts and manually test article/comment CRUD operations
3. Test permission boundaries by attempting unauthorized edits/deletions
4. Verify HTMX interactions work correctly in browser

---

Diagram

%%{ init : { "theme" : "default" }}%%
graph TB
    subgraph "Test Files (Major Edits)"
        AT["realworld/articles/tests.py<br/>+TestEditArticleView<br/>+TestDeleteArticleView<br/>+Enhanced validation"]:::major-edit
        CT["realworld/comments/tests.py<br/>+TestCommentModel<br/>+TestEditCommentView<br/>+TestDeleteCommentView"]:::major-edit
        UT["realworld/accounts/tests.py<br/>+TestSettingsView<br/>+TestHTMXIntegration<br/>+TestIntegrationWorkflows"]:::major-edit
    end
    
    subgraph "Application Code (Context)"
        AV["realworld/articles/views.py<br/>edit_article, delete_article"]:::context
        CV["realworld/comments/views.py<br/>edit_comment, delete_comment"]:::context
        UV["realworld/accounts/views.py<br/>settings, profile"]:::context
        AM["realworld/articles/models.py<br/>Article model"]:::context
        CM["realworld/comments/models.py<br/>Comment model"]:::context
    end
    
    AT -->|"Tests CRUD operations"| AV
    AT -->|"Tests model relationships"| AM
    CT -->|"Tests CRUD operations"| CV
    CT -->|"Tests model relationships"| CM
    UT -->|"Tests profile/settings"| UV
    
    subgraph Legend
        L1["Major Edit"]:::major-edit
        L2["Minor Edit"]:::minor-edit
        L3["Context/No Edit"]:::context
    end

classDef major-edit fill:#90EE90
classDef minor-edit fill:#87CEEB
classDef context fill:#FFFFFF

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Notes

• Session Info: Requested by Ameen (@ameen15) - Devin Session
• One failing test needs investigation - may indicate actual application behavior vs. test expectation mismatch
• Permission tests are security-critical - ensure they align with actual business requirements
• HTMX integration relies on django-htmx middleware and specific header handling
• Test patterns follow existing codebase conventions using setUpTestData and force_login
• Cross-model imports added to accounts tests may indicate architectural coupling to review

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