Fix for 'The getter 'isDynamic' was called on null' because of dartbug.com/28515

pkg/analyzer/test/src/dart/analysis/driver_test.dart

 // Copyright (c) 2016, 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 analyzer.test.driver;
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 844 matching lines @@
 
     var result = await driver.getResult(a);
 
     // The content that was set into the overlay for "b" should be visible
     // through the AnalysisContext that was used to analyze "a".
     CompilationUnitElement unitA = result.unit.element;
     Source sourceB = unitA.library.imports[0].importedLibrary.source;
     expect(unitA.context.getContents(sourceB).data, 'var v = 2;');
   }
 
+  test_getResult_functionTypeFormalParameter_withTypeParameter() async {
+    // This was code crashing because of incomplete implementation.
+    // Consider (re)moving after fixing dartbug.com/28515
+    addTestFile(r'''
+class A {
+  int foo( bar<T extends B>() ) {}
+}
+class B {}
+''');
+
+    AnalysisResult result = await driver.getResult(testFile);
+    expect(result.path, testFile);
+  }
+
   test_getResult_inferTypes_finalField() async {
     addTestFile(
         r'''
 class C {
   final f = 42;
 }
 ''',
         priority: true);
     await scheduler.waitForIdle();
 
@@ skipping 1176 matching lines @@
    * Return the [provider] specific path for the given Posix [path].
    */
   String _p(String path) => provider.convertPath(path);
 
   static String _md5(String content) {
     return hex.encode(md5.convert(UTF8.encode(content)).bytes);
   }
 }
 
 class _SourceMock extends TypedMock implements Source {}