fix inference of `hashCode` with library prefix

pkg/analyzer/test/generated/resolver_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 engine.resolver_test;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/context/context.dart' as newContext;
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 13935 matching lines @@
   dynamic obj;
   obj..$name()..$name(); // marker
 }''';
     SimpleIdentifier methodName = _findMarkedIdentifier(code, "(); // marker");
     MethodInvocation methodInvoke = methodName.parent;
 
     expect(methodInvoke.staticType, typeProvider.dynamicType);
     expect(methodInvoke.realTarget.staticType, typeProvider.dynamicType);
   }
 
+
+  void test_objectAccessInference_disabled_for_local_getter() {
+    String name = 'hashCode';
+    String code = '''
+dynamic get $name => null;
+main() {
+  $name; // marker
+}''';
+
+    SimpleIdentifier getter = _findMarkedIdentifier(code, "; // marker");
+    expect(getter.staticType, typeProvider.dynamicType);
+  }
+
+  void test_objectAccessInference_disabled_for_library_prefix() {
+    String name = 'hashCode';
+    addNamedSource('/helper.dart', '''
+library helper;
+dynamic get $name => 42;
+''');
+    String code = '''
+import 'helper.dart' as helper;
+main() {
+  helper.$name; // marker
+}''';
+
+    SimpleIdentifier id = _findMarkedIdentifier(code, "; // marker");
+    PrefixedIdentifier prefixedId = id.parent;
+    expect(id.staticType, typeProvider.dynamicType);
+    expect(prefixedId.staticType, typeProvider.dynamicType);
+  }
+
+  void test_objectAccessInference_enabled_for_cascades() {
+    String name = 'hashCode';
+    String code = '''
+main() {
+  dynamic obj;
+  obj..$name..$name; // marker
+}''';
+    PropertyAccess access = _findMarkedIdentifier(code, "; // marker").parent;
+    expect(access.staticType, typeProvider.dynamicType);
+    expect(access.realTarget.staticType, typeProvider.dynamicType);
+  }
+
   void test_propagatedReturnType_localFunction() {
     String code = r'''
 main() {
   f() => 42;
   var v = f();
 }''';
     _assertPropagatedAssignedType(
         code, typeProvider.dynamicType, typeProvider.intType);
   }
 
@@ skipping 817 matching lines @@
         // check propagated type
         FunctionType propagatedType = node.propagatedType as FunctionType;
         expect(propagatedType.returnType, test.typeProvider.stringType);
       } on AnalysisException catch (e, stackTrace) {
         thrownException[0] = new CaughtException(e, stackTrace);
       }
     }
     return null;
   }
 }