Fix for searching parameters of constructors.

pkg/analysis_server/test/services/search/search_engine_test.dart

 // Copyright (c) 2014, 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 test.services.src.search.search_engine_internal;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
@@ skipping 547 matching lines @@
 }
 ''');
     MethodMember method = findNodeElementAtString('m(); // ref');
     Element mainElement = findElement('main');
     var expected = [
       _expectIdQ(mainElement, MatchKind.INVOCATION, 'm(); // ref')
     ];
     await _verifyReferences(method, expected);
   }
 
+  test_searchReferences_ParameterElement_ofConstructor() async {
+    _indexTestUnit('''
+class C {
+  var f;
+  C({p}) : f = p + 1 {
+    p = 2;
+    p += 3;
+    print(p);
+    p();
+  }
+}
+main() {
+  new C(p: 42);
+}
+''');
+    ParameterElement element = findElement('p');
+    ClassElement classC = findElement('C');
+    ConstructorElement constructorA = classC.unnamedConstructor;
+    Element mainElement = findElement('main');
+    var expected = [
+      _expectId(constructorA, MatchKind.READ, 'p + 1 {'),
+      _expectId(constructorA, MatchKind.WRITE, 'p = 2;'),
+      _expectId(constructorA, MatchKind.READ_WRITE, 'p += 3;'),
+      _expectId(constructorA, MatchKind.READ, 'p);'),
+      _expectId(constructorA, MatchKind.INVOCATION, 'p();'),
+      _expectIdQ(mainElement, MatchKind.REFERENCE, 'p: 42')
+    ];
+    await _verifyReferences(element, expected);
+  }
+
   test_searchReferences_ParameterElement_ofLocalFunction() async {
     _indexTestUnit('''
 main() {
   foo({p}) {
     p = 1;
     p += 2;
     print(p);
     p();
   }
   foo(p: 42);
@@ skipping 268 matching lines @@
     List<SearchMatch> matches = await searchEngine.searchReferences(element);
     _assertMatches(matches, expectedMatches);
     expect(matches, hasLength(expectedMatches.length));
   }
 
   static void _assertMatches(
       List<SearchMatch> matches, List<ExpectedMatch> expectedMatches) {
     expect(matches, unorderedEquals(expectedMatches));
   }
 }