include library prefix suggestions when suggesting constructors

pkg/analysis_server/test/services/completion/imported_computer_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.completion.toplevel;
 
-import 'package:analysis_server/src/protocol.dart';
+import 'package:analysis_server/src/protocol.dart' as protocol
+    show Element, ElementKind;
+import 'package:analysis_server/src/protocol.dart' hide Element, ElementKind;
 import 'package:analysis_server/src/services/completion/completion_manager.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_cache.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
 import 'package:analysis_server/src/services/completion/imported_computer.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 103 matching lines @@
       {int relevance: DART_RELEVANCE_INHERITED_METHOD}) {
     return assertSuggestMethod(name, declaringType, returnType,
         relevance: relevance);
   }
 
   CompletionSuggestion assertSuggestImportedSetter(String name,
       {int relevance: DART_RELEVANCE_INHERITED_ACCESSOR}) {
     return assertSuggestSetter(name, relevance);
   }
 
+  @override
+  CompletionSuggestion assertSuggestLibraryPrefix(String prefix,
+      [int relevance = DART_RELEVANCE_DEFAULT,
+      CompletionSuggestionKind kind = CompletionSuggestionKind.INVOCATION]) {
+    CompletionSuggestion cs =
+        assertSuggest(prefix, csKind: kind, relevance: relevance);
+    protocol.Element element = cs.element;
+    expect(element, isNotNull);
+    expect(element.kind, equals(protocol.ElementKind.LIBRARY));
+    expect(element.parameters, isNull);
+    expect(element.returnType, isNull);
+    assertHasNoParameterInfo(cs);
+    return cs;
+  }
+
   bool isCached(List<CompletionSuggestion> suggestions, String completion) =>
       suggestions.any((CompletionSuggestion s) => s.completion == completion);
 
   @override
   void setUpComputer() {
     computer = new ImportedComputer(shouldWaitForLowPrioritySuggestions: true);
   }
 
   @override
   test_ArgumentList() {
@@ skipping 211 matching lines @@
     });
   }
 
   test_InstanceCreationExpression() {
     addSource('/testA.dart', '''
 class A {foo(){var f; {var x;}}}
 class B {B(this.x, [String boo]) { } int x;}
 class C {C.bar({boo: 'hoo', int z: 0}) { } }''');
     addTestSource('''
 import "/testA.dart";
+import "dart:math" as math;
 main() {new ^ String x = "hello";}''');
     computeFast();
     return computeFull((bool result) {
       CompletionSuggestion suggestion;
 
       suggestion = assertSuggestImportedConstructor('Object');
       expect(suggestion.element.parameters, '()');
       expect(suggestion.parameterNames, hasLength(0));
       expect(suggestion.requiredParameterCount, 0);
       expect(suggestion.hasNamedParameters, false);
@@ skipping 17 matching lines @@
       suggestion = assertSuggestImportedConstructor('C.bar');
       expect(
           suggestion.element.parameters, "({dynamic boo: 'hoo'}, {int z: 0})");
       expect(suggestion.parameterNames, hasLength(2));
       expect(suggestion.parameterNames[0], 'boo');
       expect(suggestion.parameterTypes[0], 'dynamic');
       expect(suggestion.parameterNames[1], 'z');
       expect(suggestion.parameterTypes[1], 'int');
       expect(suggestion.requiredParameterCount, 0);
       expect(suggestion.hasNamedParameters, true);
+
+      assertSuggestLibraryPrefix('math');
     });
   }
 
   test_method_parameters_mixed_required_and_named() {
     addSource('/libA.dart', '''
 class A {
   void m(x, {int y}) {}
 }
 ''');
     addTestSource('''
@@ skipping 273 matching lines @@
   }
 
   @override
   test_partFile_TypeName2() {
     return super.test_partFile_TypeName2().then((_) {
       expect(request.cache.importKey,
           'library libA;import "/testB.dart";part "/testA.dart";');
     });
   }
 }