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>

.ralph/prd.json

@@ -212,7 +212,7 @@
         "go test ./pkg/tools -run TestWebTool passes"
       ],
       "priority": 14,
-      "passes": false,
+      "passes": true,
       "notes": ""
     },
     {

.ralph/progress.txt

@@ -6,12 +6,12 @@ Tool 返回值结构化重构 - 将 Tool 接口返回值从 (string, error) 改
 
 ## Progress
 
-### Completed (10/21)
+### Completed (14/21)
 
 - US-001: Add ToolResult struct and helper functions
 - US-002: Modify Tool interface to return *ToolResult
 - US-004: Delete isToolConfirmationMessage function (already removed in commit 488e7a9)
-- US-005: Update AgentLoop tool result processing logic
+- US-005: Update AgentLoop tool result logic
 - US-006: Add AsyncCallback type and AsyncTool interface
 - US-007: Heartbeat async task execution support
 - US-008: Inject callback into async tools in AgentLoop
@@ -20,6 +20,9 @@ Tool 返回值结构化重构 - 将 Tool 接口返回值从 (string, error) 改
 - US-011: Refactor MessageTool to use ToolResult
 - US-012: Refactor ShellTool to use ToolResult
 - US-013: Refactor FilesystemTool to use ToolResult
+- US-014: Refactor WebTool to use ToolResult
+- US-012: Refactor ShellTool to use ToolResult
+- US-013: Refactor FilesystemTool to use ToolResult
 
 ### In Progress
 
@@ -40,7 +43,7 @@ Tool 返回值结构化重构 - 将 Tool 接口返回值从 (string, error) 改
 | US-011 | Refactor MessageTool to use ToolResult | Completed | Added test file message_test.go |
 | US-012 | Refactor ShellTool to use ToolResult | Completed | |
 | US-013 | Refactor FilesystemTool to use ToolResult | Completed | Added test file filesystem_test.go |
-| US-014 | Refactor WebTool to use ToolResult | Completed | |
+| US-014 | Refactor WebTool to use ToolResult | Completed | Added test file web_test.go |
 | US-015 | Refactor EditTool to use ToolResult | Completed | |
 | US-016 | Refactor CronTool to use ToolResult | Pending | |
 | US-017 | Refactor SpawnTool to use AsyncTool and callbacks | Pending | |
@@ -269,4 +272,27 @@ Tool 返回值结构化重构 - 将 Tool 接口返回值从 (string, error) 改
   - **Gotchas encountered:** 最初误解了 NewToolResult 的行为，以为它会设置 ForUser，但实际上它只设置 ForLLM。
   - **Useful context:** WriteFileTool 会自动创建不存在的目录（使用 os.MkdirAll），这是文件写入工具的重要功能。
 
+---
+
+## [2026-02-12] - US-014
+- What was implemented:
+  - WebTool 已经完全使用 ToolResult 返回值（无需修改实现）
+  - 添加了完整的测试文件 `pkg/tools/web_test.go`，包含 9 个测试用例
+  - 测试覆盖了所有验收标准：
+    - WebFetchTool 成功返回 ForUser=获取的内容，ForLLM=摘要
+    - WebSearchTool 缺少 API Key 返回 ErrorResult
+    - URL 验证测试（无效 URL、不支持 scheme、缺少域名）
+    - JSON 内容处理测试
+    - HTML 提取和清理测试（移除 script/style 标签）
+    - 内容截断测试
+    - 缺少参数错误处理
+
+- Files changed:
+  - `pkg/tools/web_test.go` (新增)
+
+- **Learnings for future iterations:**
+  - **Patterns discovered:** WebTool 使用 httptest.NewServer 创建模拟服务器进行测试，避免依赖外部 API。WebFetchTool 返回 JSON 格式的结构化内容给用户，包含 url、status、extractor、truncated、length、text 字段。
+  - **Gotchas encountered:** 无
+  - **Useful context:** WebSearchTool 需要配置 BRAVE_API_KEY 环境变量才能正常工作。WebFetchTool 支持多种内容类型：JSON（格式化）、HTML（文本提取）、纯文本。
+
 ---

pkg/tools/web_test.go

@@ -0,0 +1,263 @@
+package tools
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+// TestWebTool_WebFetch_Success verifies successful URL fetching
+func TestWebTool_WebFetch_Success(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "text/html")
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte("<html><body><h1>Test Page</h1><p>Content here</p></body></html>"))
+	}))
+	defer server.Close()
+
+	tool := NewWebFetchTool(50000)
+	ctx := context.Background()
+	args := map[string]interface{}{
+		"url": server.URL,
+	}
+
+	result := tool.Execute(ctx, args)
+
+	// Success should not be an error
+	if result.IsError {
+		t.Errorf("Expected success, got IsError=true: %s", result.ForLLM)
+	}
+
+	// ForUser should contain the fetched content
+	if !strings.Contains(result.ForUser, "Test Page") {
+		t.Errorf("Expected ForUser to contain 'Test Page', got: %s", result.ForUser)
+	}
+
+	// ForLLM should contain summary
+	if !strings.Contains(result.ForLLM, "bytes") && !strings.Contains(result.ForLLM, "extractor") {
+		t.Errorf("Expected ForLLM to contain summary, got: %s", result.ForLLM)
+	}
+}
+
+// TestWebTool_WebFetch_JSON verifies JSON content handling
+func TestWebTool_WebFetch_JSON(t *testing.T) {
+	testData := map[string]string{"key": "value", "number": "123"}
+	expectedJSON, _ := json.MarshalIndent(testData, "", "  ")
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Write(expectedJSON)
+	}))
+	defer server.Close()
+
+	tool := NewWebFetchTool(50000)
+	ctx := context.Background()
+	args := map[string]interface{}{
+		"url": server.URL,
+	}
+
+	result := tool.Execute(ctx, args)
+
+	// Success should not be an error
+	if result.IsError {
+		t.Errorf("Expected success, got IsError=true: %s", result.ForLLM)
+	}
+
+	// ForUser should contain formatted JSON
+	if !strings.Contains(result.ForUser, "key") && !strings.Contains(result.ForUser, "value") {
+		t.Errorf("Expected ForUser to contain JSON data, got: %s", result.ForUser)
+	}
+}
+
+// TestWebTool_WebFetch_InvalidURL verifies error handling for invalid URL
+func TestWebTool_WebFetch_InvalidURL(t *testing.T) {
+	tool := NewWebFetchTool(50000)
+	ctx := context.Background()
+	args := map[string]interface{}{
+		"url": "not-a-valid-url",
+	}
+
+	result := tool.Execute(ctx, args)
+
+	// Should return error result
+	if !result.IsError {
+		t.Errorf("Expected error for invalid URL")
+	}
+
+	// Should contain error message (either "invalid URL" or scheme error)
+	if !strings.Contains(result.ForLLM, "URL") && !strings.Contains(result.ForUser, "URL") {
+		t.Errorf("Expected error message for invalid URL, got ForLLM: %s", result.ForLLM)
+	}
+}
+
+// TestWebTool_WebFetch_UnsupportedScheme verifies error handling for non-http URLs
+func TestWebTool_WebFetch_UnsupportedScheme(t *testing.T) {
+	tool := NewWebFetchTool(50000)
+	ctx := context.Background()
+	args := map[string]interface{}{
+		"url": "ftp://example.com/file.txt",
+	}
+
+	result := tool.Execute(ctx, args)
+
+	// Should return error result
+	if !result.IsError {
+		t.Errorf("Expected error for unsupported URL scheme")
+	}
+
+	// Should mention only http/https allowed
+	if !strings.Contains(result.ForLLM, "http/https") && !strings.Contains(result.ForUser, "http/https") {
+		t.Errorf("Expected scheme error message, got ForLLM: %s", result.ForLLM)
+	}
+}
+
+// TestWebTool_WebFetch_MissingURL verifies error handling for missing URL
+func TestWebTool_WebFetch_MissingURL(t *testing.T) {
+	tool := NewWebFetchTool(50000)
+	ctx := context.Background()
+	args := map[string]interface{}{}
+
+	result := tool.Execute(ctx, args)
+
+	// Should return error result
+	if !result.IsError {
+		t.Errorf("Expected error when URL is missing")
+	}
+
+	// Should mention URL is required
+	if !strings.Contains(result.ForLLM, "url is required") && !strings.Contains(result.ForUser, "url is required") {
+		t.Errorf("Expected 'url is required' message, got ForLLM: %s", result.ForLLM)
+	}
+}
+
+// TestWebTool_WebFetch_Truncation verifies content truncation
+func TestWebTool_WebFetch_Truncation(t *testing.T) {
+	longContent := strings.Repeat("x", 20000)
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "text/plain")
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte(longContent))
+	}))
+	defer server.Close()
+
+	tool := NewWebFetchTool(1000) // Limit to 1000 chars
+	ctx := context.Background()
+	args := map[string]interface{}{
+		"url": server.URL,
+	}
+
+	result := tool.Execute(ctx, args)
+
+	// Success should not be an error
+	if result.IsError {
+		t.Errorf("Expected success, got IsError=true: %s", result.ForLLM)
+	}
+
+	// ForUser should contain truncated content (not the full 20000 chars)
+	resultMap := make(map[string]interface{})
+	json.Unmarshal([]byte(result.ForUser), &resultMap)
+	if text, ok := resultMap["text"].(string); ok {
+		if len(text) > 1100 { // Allow some margin
+			t.Errorf("Expected content to be truncated to ~1000 chars, got: %d", len(text))
+		}
+	}
+
+	// Should be marked as truncated
+	if truncated, ok := resultMap["truncated"].(bool); !ok || !truncated {
+		t.Errorf("Expected 'truncated' to be true in result")
+	}
+}
+
+// TestWebTool_WebSearch_NoApiKey verifies error handling when API key is missing
+func TestWebTool_WebSearch_NoApiKey(t *testing.T) {
+	tool := NewWebSearchTool("", 5)
+	ctx := context.Background()
+	args := map[string]interface{}{
+		"query": "test",
+	}
+
+	result := tool.Execute(ctx, args)
+
+	// Should return error result
+	if !result.IsError {
+		t.Errorf("Expected error when API key is missing")
+	}
+
+	// Should mention missing API key
+	if !strings.Contains(result.ForLLM, "BRAVE_API_KEY") && !strings.Contains(result.ForUser, "BRAVE_API_KEY") {
+		t.Errorf("Expected API key error message, got ForLLM: %s", result.ForLLM)
+	}
+}
+
+// TestWebTool_WebSearch_MissingQuery verifies error handling for missing query
+func TestWebTool_WebSearch_MissingQuery(t *testing.T) {
+	tool := NewWebSearchTool("test-key", 5)
+	ctx := context.Background()
+	args := map[string]interface{}{}
+
+	result := tool.Execute(ctx, args)
+
+	// Should return error result
+	if !result.IsError {
+		t.Errorf("Expected error when query is missing")
+	}
+}
+
+// TestWebTool_WebFetch_HTMLExtraction verifies HTML text extraction
+func TestWebTool_WebFetch_HTMLExtraction(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "text/html")
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte(`<html><body><script>alert('test');</script><style>body{color:red;}</style><h1>Title</h1><p>Content</p></body></html>`))
+	}))
+	defer server.Close()
+
+	tool := NewWebFetchTool(50000)
+	ctx := context.Background()
+	args := map[string]interface{}{
+		"url": server.URL,
+	}
+
+	result := tool.Execute(ctx, args)
+
+	// Success should not be an error
+	if result.IsError {
+		t.Errorf("Expected success, got IsError=true: %s", result.ForLLM)
+	}
+
+	// ForUser should contain extracted text (without script/style tags)
+	if !strings.Contains(result.ForUser, "Title") && !strings.Contains(result.ForUser, "Content") {
+		t.Errorf("Expected ForUser to contain extracted text, got: %s", result.ForUser)
+	}
+
+	// Should NOT contain script or style tags
+	if strings.Contains(result.ForUser, "<script>") || strings.Contains(result.ForUser, "<style>") {
+		t.Errorf("Expected script/style tags to be removed, got: %s", result.ForUser)
+	}
+}
+
+// TestWebTool_WebFetch_MissingDomain verifies error handling for URL without domain
+func TestWebTool_WebFetch_MissingDomain(t *testing.T) {
+	tool := NewWebFetchTool(50000)
+	ctx := context.Background()
+	args := map[string]interface{}{
+		"url": "https://",
+	}
+
+	result := tool.Execute(ctx, args)
+
+	// Should return error result
+	if !result.IsError {
+		t.Errorf("Expected error for URL without domain")
+	}
+
+	// Should mention missing domain
+	if !strings.Contains(result.ForLLM, "domain") && !strings.Contains(result.ForUser, "domain") {
+		t.Errorf("Expected domain error message, got ForLLM: %s", result.ForLLM)
+	}
+}