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yinwm 0ac93d4429 feat: US-014 - Add WebTool tests

Added comprehensive test coverage for WebTool (WebSearchTool, WebFetchTool) with 9 test cases:
- TestWebTool_WebFetch_Success: Verifies successful URL fetching
- TestWebTool_WebFetch_JSON: Verifies JSON content handling
- TestWebTool_WebFetch_InvalidURL: Verifies error handling for invalid URLs
- TestWebTool_WebFetch_UnsupportedScheme: Verifies only http/https allowed
- TestWebTool_WebFetch_MissingURL: Verifies missing URL parameter handling
- TestWebTool_WebFetch_Truncation: Verifies content truncation at maxChars
- TestWebTool_WebSearch_NoApiKey: Verifies API key requirement
- TestWebTool_WebSearch_MissingQuery: Verifies missing query parameter
- TestWebTool_WebFetch_HTMLExtraction: Verifies HTML tag removal and text extraction
- TestWebTool_WebFetch_MissingDomain: Verifies domain validation

WebTool implementation already conforms to ToolResult specification:
- WebFetch returns ForUser=fetched content, ForLLM=summary with byte count
- WebSearch returns ForUser=search results, ForLLM=result count
- Errors return ErrorResult with IsError=true

Tests use httptest.NewServer for mock HTTP servers, avoiding external API dependencies.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-12 19:54:44 +08:00