convert engine element setter to completion element setter

pkg/analysis_server/test/computer/element_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.computer.element;
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart' as engine;
 import 'package:analyzer/src/generated/source.dart';
@@ skipping 265 matching lines @@
       expect(location.offset, 32);
       expect(location.length, 'myGetter'.length);
       expect(location.startLine, 2);
       expect(location.startColumn, 23);
     }
     expect(element.parameters, '(int a, {String b})');
     expect(element.returnType, 'List<String>');
     expect(element.flags, Element.FLAG_STATIC);
   }
 
+  void test_fromElement_SETTER() {
+    Source source = addSource('/test.dart', '''
+class A {
+  set mySetter(String x) {}
+}''');
+    CompilationUnit unit = resolveLibraryUnit(source);
+    engine.FieldElement engineFieldElement =
+        findElementInUnit(unit, 'mySetter', engine.ElementKind.FIELD);
+    engine.PropertyAccessorElement engineElement = engineFieldElement.setter;
+    // create notification Element
+    Element element = new Element.fromEngine(engineElement);
+    expect(element.kind, ElementKind.SETTER);
+    expect(element.name, 'mySetter');
+    {
+      Location location = element.location;
+      expect(location.file, '/test.dart');
+      expect(location.offset, 16);
+      expect(location.length, 'mySetter'.length);
+      expect(location.startLine, 2);
+      expect(location.startColumn, 7);
+    }
+    expect(element.parameters, '(String x)');
+    expect(element.returnType, isNull);
+    expect(element.flags, 0);
+  }
+
   void test_fromElement_dynamic() {
     var engineElement = engine.DynamicElementImpl.instance;
     // create notification Element
     Element element = new Element.fromEngine(engineElement);
     expect(element.kind, ElementKind.UNKNOWN);
     expect(element.name, 'dynamic');
     expect(element.location, isNull);
     expect(element.parameters, isNull);
     expect(element.returnType, isNull);
     expect(element.flags, 0);
   }
 }