feat: Add comprehensive tests for contentPattern and glob pattern matching

- Implemented final verification tests for contentPattern to validate behavior with empty strings, dangerous patterns, and normal patterns.
- Created glob pattern matching tests to verify regex conversion and matching functionality.
- Developed infinite loop risk tests using Worker threads to isolate potential blocking operations.
- Introduced optimized contentPattern tests to validate improvements in the findMatches function.
- Added verification tests to assess the effectiveness of contentPattern optimizations.
- Conducted safety tests for contentPattern to identify edge cases and potential vulnerabilities.
- Implemented unrestricted loop tests to analyze infinite loop risks without match limits.
- Developed tests for zero-width pattern detection logic to ensure proper handling of dangerous regex patterns.

test-empty-string-pattern.js

@@ -0,0 +1,81 @@
+/**
+ * 测试空字符串模式的新行为
+ */
+
+import { executeTool } from './ccw/dist/tools/index.js';
+
+async function testEmptyPattern() {
+  console.log('=== 空字符串模式测试 ===\n');
+
+  console.log('1. 测试空字符串 "" (应该返回所有内容)');
+  try {
+    const result = await executeTool('read_file', {
+      paths: 'README.md',
+      contentPattern: '',
+      includeContent: true
+    });
+
+    if (result.success) {
+      const file = result.result.files[0];
+      console.log(`✅ 成功返回文件`);
+      console.log(`   文件: ${file.path}`);
+      console.log(`   大小: ${file.size} bytes`);
+      console.log(`   内容长度: ${file.content?.length || 0} chars`);
+      console.log(`   截断: ${file.truncated ? '是' : '否'}`);
+      console.log(`   总行数: ${file.totalLines}`);
+
+      // 验证内容是否完整
+      if (file.content && file.content.length > 100) {
+        console.log(`   内容预览: ${file.content.substring(0, 100)}...`);
+      }
+    } else {
+      console.log(`❌ 失败: ${result.error}`);
+    }
+  } catch (error) {
+    console.log(`❌ 异常: ${error.message}`);
+  }
+
+  console.log('\n2. 测试正常模式 "CCW" (应该过滤)');
+  try {
+    const result = await executeTool('read_file', {
+      paths: 'README.md',
+      contentPattern: 'CCW',
+      includeContent: false
+    });
+
+    if (result.success) {
+      const file = result.result.files[0];
+      console.log(`✅ 成功返回文件`);
+      console.log(`   文件: ${file.path}`);
+      console.log(`   matches: ${file.matches?.length || 0}`);
+
+      if (file.matches && file.matches.length > 0) {
+        console.log(`   示例: ${file.matches[0]}`);
+      }
+    }
+  } catch (error) {
+    console.log(`❌ 异常: ${error.message}`);
+  }
+
+  console.log('\n3. 测试危险模式 "x*" (应该被拦截)');
+  try {
+    const result = await executeTool('read_file', {
+      paths: 'README.md',
+      contentPattern: 'x*',
+      includeContent: false
+    });
+
+    if (result.success) {
+      const file = result.result.files[0];
+      console.log(`✅ 返回文件: ${file.path}`);
+      console.log(`   matches: ${file.matches?.length || 0}`);
+      if (file.matches?.length === 0) {
+        console.log(`   (被正确拦截，没有匹配)`);
+      }
+    }
+  } catch (error) {
+    console.log(`❌ 异常: ${error.message}`);
+  }
+}
+
+testEmptyPattern().catch(console.error);