Add AnalysisDriver.getFilesDefiningClassMemberName().

pkg/analyzer/test/src/dart/analysis/driver_test.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.test.driver;
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 683 matching lines @@
     String content = 'int f() => 42 + bar();';
     addTestFile(content, priority: true);
 
     ErrorsResult result = await driver.getErrors(testFile);
     expect(result.path, testFile);
     expect(result.uri.toString(), 'package:test/test.dart');
     expect(result.contentHash, _md5(content));
     expect(result.errors, hasLength(1));
   }
 
+  test_getFilesDefiningClassMemberName() async {
+    var a = _p('/test/bin/a.dart');
+    var b = _p('/test/bin/b.dart');
+    var c = _p('/test/bin/c.dart');
+    var d = _p('/test/bin/d.dart');
+
+    provider.newFile(a, 'class A { m1() {} }');
+    provider.newFile(b, 'class B { m2() {} }');
+    provider.newFile(c, 'class C { m2() {} }');
+    provider.newFile(d, 'class D { m3() {} }');
+
+    driver.addFile(a);
+    driver.addFile(b);
+    driver.addFile(c);
+    driver.addFile(d);
+
+    expect(await driver.getFilesDefiningClassMemberName('m1'),
+        unorderedEquals([a]));
+
+    expect(await driver.getFilesDefiningClassMemberName('m2'),
+        unorderedEquals([b, c]));
+
+    expect(await driver.getFilesDefiningClassMemberName('m3'),
+        unorderedEquals([d]));
+  }
+
   test_getFilesReferencingName() async {
     var a = _p('/test/bin/a.dart');
     var b = _p('/test/bin/b.dart');
     var c = _p('/test/bin/c.dart');
     var d = _p('/test/bin/d.dart');
     var e = _p('/test/bin/e.dart');
 
     provider.newFile(a, 'class A {}');
     provider.newFile(b, "import 'a.dart'; A a;");
     provider.newFile(c, "import 'a.dart'; var a = new A();");
@@ skipping 1311 matching lines @@
    * Return the [provider] specific path for the given Posix [path].
    */
   String _p(String path) => provider.convertPath(path);
 
   static String _md5(String content) {
     return hex.encode(md5.convert(UTF8.encode(content)).bytes);
   }
 }
 
 class _SourceMock extends TypedMock implements Source {}