Start cleaning up the HTML tests.

pkg/dev_compiler/test/codegen/lib/html/element_constructor_1_test.dart

 // Copyright (c) 2011, 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.
 
 // Put universally passing event constructors in this file.
 // Move constructors that fail on some configuration to their own
 // element_constructor_foo_test.dart file.
 
-library ElementConstructorTest;
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
 import 'dart:html';
 
+import 'package:minitest/minitest.dart';
+
 main() {
-  useHtmlConfiguration();
-
-  var isAnchorElement = 
+  var isAnchorElement =
       predicate((x) => x is AnchorElement, 'is an AnchorElement');
-  var isAreaElement = 
+  var isAreaElement =
       predicate((x) => x is AreaElement, 'is an AreaElement');
   var isDivElement = predicate((x) => x is DivElement, 'is a DivElement');
-  var isCanvasElement = 
+  var isCanvasElement =
       predicate((x) => x is CanvasElement, 'is a CanvasElement');
   var isParagraphElement =
       predicate((x) => x is ParagraphElement, 'is a ParagraphElement');
   var isSpanElement = predicate((x) => x is SpanElement, 'is a SpanElement');
-  var isSelectElement = 
+  var isSelectElement =
       predicate((x) => x is SelectElement, 'is a SelectElement');
 
   test('anchor1', () {
       var e = new AnchorElement();
       expect(e, isAnchorElement);
     });
 
   test('anchor2', () {
       var e = new AnchorElement(href: '#blah');
       expect(e, isAnchorElement);
-      expect(e.href, endsWith('#blah'));
+      expect(e.href.endsWith('#blah'), isTrue);
     });
 
   test('area', () {
       var e = new AreaElement();
       expect(e, isAreaElement);
     });
 
   // AudioElement tested in audioelement_test.dart
 
   test('div', () {
@@ skipping 21 matching lines @@
   test('span', () {
       var e = new SpanElement();
       expect(e, isSpanElement);
     });
 
   test('select', () {
       var e = new SelectElement();
       expect(e, isSelectElement);
     });
 }