Analysis.getHover should return the field's documentation for field formal parameters.

pkg/analysis_server/test/analysis/get_hover_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.domain.analysis.hover;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:test/test.dart';
@@ skipping 290 matching lines @@
     expect(hover.dartdoc, 'The method documentation.');
     expect(hover.elementDescription, 'int p');
     expect(hover.elementKind, 'parameter');
     // types
     expect(hover.staticType, 'int');
     expect(hover.propagatedType, isNull);
     // no parameter
     expect(hover.parameter, isNull);
   }
 
+  test_expression_parameter_fieldFormal_declaration() async {
+    addTestFile('''
+class A {
+  /// The field documentation.
+  final int fff;
+  A({this.fff});
+}
+main() {
+  new A(fff: 42);
+}
+''');
+    HoverInformation hover = await prepareHover('fff});');
+    expect(hover.containingLibraryName, isNull);
+    expect(hover.containingLibraryPath, isNull);
+    expect(hover.containingClassDescription, isNull);
+    expect(hover.dartdoc, 'The field documentation.');
+    expect(hover.elementDescription, '{int fff}');
+    expect(hover.elementKind, 'parameter');
+    expect(hover.staticType, 'int');
+  }
+
+  test_expression_parameter_fieldFormal_use() async {
+    addTestFile('''
+class A {
+  /// The field documentation.
+  final int fff;
+  A({this.fff});
+}
+main() {
+  new A(fff: 42);
+}
+''');
+    HoverInformation hover = await prepareHover('fff: 42');
+    expect(hover.containingLibraryName, isNull);
+    expect(hover.containingLibraryPath, isNull);
+    expect(hover.containingClassDescription, isNull);
+    expect(hover.dartdoc, 'The field documentation.');
+    expect(hover.elementDescription, '{int fff}');
+    expect(hover.elementKind, 'parameter');
+    expect(hover.staticType, 'int');
+  }
+
   test_expression_syntheticGetter_invocation() async {
     addTestFile('''
 library my.library;
 class A {
   /// doc aaa
   /// doc bbb
   String fff;
 }
 main(A a) {
   print(a.fff);
@@ skipping 159 matching lines @@
     addTestFile('''
 library my.library;
 main() {
   // nothing
 }
 ''');
     HoverInformation hover = await prepareHover('nothing');
     expect(hover, isNull);
   }
 }