Remove uses of unittest in the HTML tests where possible.

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

 // Copyright (c) 2013, 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 SVGTest;
 import 'dart:html';
 import 'dart:svg' as svg;
-import 'package:unittest/html_individual_config.dart';
-import 'package:unittest/unittest.dart';
+
+import 'package:expect/minitest.dart';
 
 main() {
-  useHtmlIndividualConfiguration();
-
   group('svgPresence', () {
     var isSvgElement = predicate((x) => x is svg.SvgElement, 'is a SvgElement');
 
     test('simpleRect', () {
       var div = new Element.tag('div');
       document.body.append(div);
       div.setInnerHtml(r'''
 <svg id='svg1' width='200' height='100'>
 <rect id='rect1' x='10' y='20' width='130' height='40' rx='5'fill='blue'></rect>
 </svg>
@@ skipping 11 matching lines @@
     });
 
     test('trailing newline', () {
       // Ensures that we handle SVG with trailing newlines.
       var logo = new svg.SvgElement.svg("""
         <svg xmlns='http://www.w3.org/2000/svg' version='1.1'>
           <path/>
         </svg>
         """);
 
-    expect(logo, isSvgElement);
-
+      expect(logo, isSvgElement);
     });
   });
 
   group('svgInterfaceMatch', () {
     // Test that SVG elements explicitly implement the IDL interfaces (is-checks
     // only, see SVGTest3 for behavioural tests).
     insertTestDiv() {
       var element = new Element.tag('div');
       element.setInnerHtml(r'''
 <svg id='svg1' width='200' height='100'>
 <rect id='rect1' x='10' y='20' width='130' height='40' rx='5'fill='blue'></rect>
 </svg>
 ''', validator: new NodeValidatorBuilder()..allowSvg());
       document.body.append(element);
       return element;
     }
 
 
     var isElement = predicate((x) => x is Element, 'is an Element');
     var isSvgElement = predicate((x) => x is svg.SvgElement, 'is a SvgElement');
     var isSvgSvgElement =
         predicate((x) => x is svg.SvgSvgElement, 'is a SvgSvgElement');
+    var isNotSvgSvgElement =
+        predicate((x) => x is! svg.SvgSvgElement, 'is not a SvgSvgElement');
     var isNode = predicate((x) => x is Node, 'is a Node');
     var isSvgNumber = predicate((x) => x is svg.Number, 'is a svg.Number');
+    var isNotSvgNumber = predicate((x) => x is! svg.Number, 'is not a svg.Number');
     var isSvgRect = predicate((x) => x is svg.Rect, 'is a svg.Rect');
+    var isNotSvgRect = predicate((x) => x is! svg.Rect, 'is not a svg.Rect');
 
     test('rect_isChecks', () {
         var div = insertTestDiv();
         var r = document.query('#rect1');
 
         // Direct inheritance chain
         expect(r, isSvgElement);
         expect(r, isElement);
         expect(r, isNode);
 
         // Interfaces not implemented.
-        expect(r, isNot(isSvgNumber));
-        expect(r, isNot(isSvgRect));
-        expect(r, isNot(isSvgSvgElement));
+        expect(r, isNotSvgNumber);
+        expect(r, isNotSvgRect);
+        expect(r, isNotSvgSvgElement);
 
         div.remove();
       });
     });
 
   insertTestDiv() {
     var element = new Element.tag('div');
     element.innerHtml = r'''
 <svg id='svg1' width='200' height='100'>
 <rect id='rect1' x='10' y='20' width='130' height='40' rx='5'fill='blue'></rect>
@@ skipping 28 matching lines @@
       test(name, () {
         var div = insertTestDiv();
         var r = document.query('#rect1');
         checker(r);
         div.remove();
       });
     }
   });
 
 }