test: 新增 8 个测试文件 63 用例 + 覆盖率设施，行覆盖 42.58%→48.24%

- 新增 jsp-extractor/report/method-extractor/fix-prompt/registry/provider-chat/import-service/yaml-parser 测试
- .vscode-test.mjs 加 srcDir+coverage，package.json 加 test:coverage，产出 tests/coverage/（html）
- 修复 method-extractor java fallback 取错捕获组、mockDocument.getText 忽略 range
- 更新 tests/test-cases.md（24 文件 179 条）与 test-execution-log.md（覆盖率记录）

src/scope/method-extractor.ts

@@ -199,7 +199,7 @@ function fallbackRegexSymbols(document: vscode.TextDocument): MethodSymbol[] {
     pattern.lastIndex = 0;
     let match: RegExpExecArray | null;
     while ((match = pattern.exec(text)) !== null) {
-      const name = match[1] ?? match[2];
+      const name = match[2] ?? match[1];
       if (!name) { continue; }
       const start = document.positionAt(match.index);
       const key = `${name}@${start.line}`;

src/utils/mockDocument.ts

@@ -4,6 +4,19 @@ export function mockDocument(code: string, language: string, fileName?: string):
   const lines = code.split('\n');
   const uri = vscode.Uri.parse('untitled:virtual');
   const ext = language === 'javascript' ? 'js' : language === 'typescript' ? 'ts' : language === 'css' ? 'css' : 'java';
+  const offsetAt = (p: vscode.Position): number => {
+    let offset = 0;
+    for (let i = 0; i < p.line; i++) offset += lines[i].length + 1;
+    return offset + p.character;
+  };
+  const positionAt = (offset: number): vscode.Position => {
+    let remaining = offset;
+    for (let i = 0; i < lines.length; i++) {
+      if (remaining <= lines[i].length) return new vscode.Position(i, remaining);
+      remaining -= lines[i].length + 1;
+    }
+    return new vscode.Position(lines.length - 1, lines[lines.length - 1].length);
+  };
   return {
     uri,
     fileName: fileName ?? `untitled.${ext}`,
@@ -14,7 +27,10 @@ export function mockDocument(code: string, language: string, fileName?: string):
     isClosed: false,
     eol: vscode.EndOfLine.LF,
     lineCount: lines.length,
-    getText: () => code,
+    getText: (range?: vscode.Range) => {
+      if (!range) { return code; }
+      return code.slice(offsetAt(range.start), offsetAt(range.end));
+    },
     lineAt: (arg: number | vscode.Position) => {
       const line = typeof arg === 'number' ? arg : arg.line;
       const text = lines[line] ?? '';
@@ -27,19 +43,8 @@ export function mockDocument(code: string, language: string, fileName?: string):
         isEmptyOrWhitespace: text.trim().length === 0,
       };
     },
-    offsetAt: (p: vscode.Position) => {
-      let offset = 0;
-      for (let i = 0; i < p.line; i++) offset += lines[i].length + 1;
-      return offset + p.character;
-    },
-    positionAt: (offset: number) => {
-      let remaining = offset;
-      for (let i = 0; i < lines.length; i++) {
-        if (remaining <= lines[i].length) return new vscode.Position(i, remaining);
-        remaining -= lines[i].length + 1;
-      }
-      return new vscode.Position(lines.length - 1, lines[lines.length - 1].length);
-    },
+    offsetAt,
+    positionAt,
     getWordRangeAtPosition: () => undefined,
     validateRange: (r: vscode.Range) => r,
     validatePosition: (p: vscode.Position) => p,