New expectation functions plus convert old tests to use these.

tests/html/typed_arrays_range_checks_test.dart

Index: tests/html/typed_arrays_range_checks_test.dart
===================================================================
--- tests/html/typed_arrays_range_checks_test.dart	(revision 8345)
+++ tests/html/typed_arrays_range_checks_test.dart	(working copy)
@@ -13,13 +13,13 @@
   test('outOfRangeAccess_dynamic', () {
       var a = new Uint8Array(1024);
 
-      expect(a[a.length]).isNull();
-      expect(a[a.length + 1]).isNull();
-      expect(a[a.length + 1024]).isNull();
+      expect(a[a.length], isNull);
+      expect(a[a.length + 1], isNull);
+      expect(a[a.length + 1024], isNull);
 
-      // expect(a[-1]).isNull();
-      // expect(a[-2]).isNull();
-      // expect(a[-1024]).isNull();
+      // expect(a[-1], isNull);
+      // expect(a[-2], isNull);
+      // expect(a[-1024], isNull);
 
       // It's harder to test out of range setters, but let's do some minimum.
       a[a.length] = 0xdeadbeaf;
@@ -34,13 +34,13 @@
   test('outOfRange_typed', () {
       Uint8Array a = new Uint8Array(1024);
 
-      expect(a[a.length]).isNull();
-      expect(a[a.length + 1]).isNull();
-      expect(a[a.length + 1024]).isNull();
+      expect(a[a.length], isNull);
+      expect(a[a.length + 1], isNull);
+      expect(a[a.length + 1024], isNull);
 
-      // expect(a[-1]).isNull();
-      // expect(a[-2]).isNull();
-      // expect(a[-1024]).isNull();
+      // expect(a[-1], isNull);
+      // expect(a[-2], isNull);
+      // expect(a[-1024], isNull);
 
       // It's harder to test out of range setters, but let's do some minimum.
       a[a.length] = 0xdeadbeaf;