test: Add comprehensive test suite for database models

[saber04414]

Description

This PR adds a comprehensive unit test suite for all database models to ensure proper model validation, field type checking, index creation, and relationship handling.

Changes

• Added: test/database_models_suite.py - Complete test suite for all database models

Test Coverage

✅ Test Case 1: BilibiliVideo Model Validation

• Verifies successful creation of BilibiliVideo instances
• Tests required fields (video_id, video_url)
• Validates unique constraint on video_id
• Tests all field assignments and retrieval

✅ Test Case 2: DouyinAweme Model Validation

• Verifies successful creation of DouyinAweme instances
• Tests all field assignments including user information
• Validates default values (source_keyword)
• Tests field type correctness

✅ Test Case 3: XhsNote Model Validation

• Verifies successful creation of XhsNote instances
• Tests all fields including note metadata
• Validates default values
• Tests text field handling for long content

✅ Test Case 4: WeiboNote Model Validation

• Verifies successful creation of WeiboNote instances
• Tests all fields including user and note information
• Validates default values (ip_location, source_keyword)
• Tests datetime field handling

✅ Test Case 5: TiebaNote Model Validation

• Verifies successful creation of TiebaNote instances
• Tests all fields including tieba and user information
• Validates default values for optional fields
• Tests integer default values

✅ Test Case 6: ZhihuContent Model Validation

• Verifies successful creation of ZhihuContent instances
• Tests all fields including content and user information
• Validates default values (voteup_count, comment_count)
• Tests content type handling

✅ Test Case 7: Field Type Validation

• Tests that Integer fields accept integer values
• Tests that BigInteger fields accept large integer values
• Tests that String/Text fields accept string values
• Tests that Text fields can handle long strings
• Validates type correctness for all model fields

✅ Test Case 8: Index Creation

• Verifies indexes exist on key fields for all models
• Tests query performance using indexed fields
• Validates index functionality:
  • BilibiliVideo: video_id (unique), user_id, create_time
  • DouyinAweme: aweme_id, create_time
  • XhsNote: note_id, time
  • WeiboNote: note_id, create_time, create_date_time
  • TiebaNote: note_id, publish_time
  • ZhihuContent: content_id, created_time

✅ Test Case 9: Relationship Validation

• Tests model independence (no foreign key conflicts)
• Verifies all models can coexist in the same database
• Tests that each model maintains data integrity
• Validates table names are correct
• Tests primary key auto-increment functionality

Additional Features

• In-Memory Database: Uses SQLite in-memory database for fast, isolated testing
• Comprehensive Comments: Extensive inline comments and docstrings for easy understanding
• Clear Structure: Well-organized test methods with clear section separators
• Edge Case Coverage: Tests default values, field types, and constraints
• No External Dependencies: Tests run without requiring actual database connections

Testing

Run the test suite with:
python -m unittest test.database_models_suiteOr directly:
python test/database_models_suite.py## Notes

• All tests use SQLite in-memory database for fast execution
• Tests are isolated and don't affect actual database
• Code includes extensive comments and blank lines for readability
• Follows the project's code style and licensing requirements
• Tests cover all 6 main models: BilibiliVideo, DouyinAweme, XhsNote, WeiboNote, TiebaNote, ZhihuContent

Contribution by Gittensor, learn more at https://gittensor.io/

[saber04414]

@NanmiCoder Could you please review my PR?