Move most of the dart:ui tests to package:test. (#55090)

Work towards flutter/flutter#133569.

There are a couple with custom matchers I'd like to migrate in a follow-up PR.

Author: matanlurey

testing/dart/assets_test.dart

@@ -7,7 +7,7 @@ import 'dart:convert';
 import 'dart:typed_data';
 import 'dart:ui';
 
-import 'package:litetest/litetest.dart';
+import 'package:test/test.dart';
 
 void main() {
   test('Loading an asset that does not exist returns null', () async {
@@ -81,7 +81,7 @@ void main() {
     final List<int> bundledFontImage = await _createPictureFromFont('Roboto2');
     // Bundling fonts is disabled, so the font selected in both cases should be ahem.
     // Therefore each buffer will contain identical contents.
-    expect(ahemImage, notEquals(bundledFontImage));
+    expect(ahemImage, isNot(bundledFontImage));
   });
 }
 

testing/dart/channel_buffers_test.dart

@@ -9,7 +9,7 @@ import 'dart:convert';
 import 'dart:typed_data';
 import 'dart:ui' as ui;
 
-import 'package:litetest/litetest.dart';
+import 'package:test/test.dart';
 
 ByteData _makeByteData(String str) {
   final Uint8List list = utf8.encode(str);

testing/dart/codec_test.dart

@@ -6,8 +6,8 @@ import 'dart:io';
 import 'dart:typed_data';
 import 'dart:ui' as ui;
 
-import 'package:litetest/litetest.dart';
 import 'package:path/path.dart' as path;
+import 'package:test/test.dart';
 
 import 'impeller_enabled.dart';
 

testing/dart/color_filter_test.dart

@@ -5,7 +5,7 @@
 import 'dart:typed_data';
 import 'dart:ui';
 
-import 'package:litetest/litetest.dart';
+import 'package:test/test.dart';
 
 import 'impeller_enabled.dart';
 

testing/dart/compositing_test.dart

@@ -5,7 +5,7 @@
 import 'dart:typed_data';
 import 'dart:ui';
 
-import 'package:litetest/litetest.dart';
+import 'package:test/test.dart';
 
 void main() {
   test('Scene.toImageSync succeeds', () async {
@@ -76,7 +76,7 @@ void main() {
     if (assertsEnabled) {
       expect(
         () => builder.addPicture(Offset.zero, picture),
-        throwsA(isInstanceOf<AssertionError>()),
+        throwsA(const isInstanceOf<AssertionError>()),
       );
     } else {
       builder.addPicture(Offset.zero, picture);
@@ -105,7 +105,7 @@ void main() {
     assert(() {
       expect(
         () => builder.pushTransform(matrix4WrongLength),
-        expectAssertion,
+        throwsA(isA<AssertionError>()),
       );
       return true;
     }());
@@ -119,7 +119,7 @@ void main() {
     assert(() {
       expect(
         () => builder.pushTransform(matrix4NaN),
-        expectAssertion,
+        throwsA(isA<AssertionError>()),
       );
       return true;
     }());
@@ -133,7 +133,7 @@ void main() {
     assert(() {
       expect(
         () => builder.pushTransform(matrix4Infinity),
-        expectAssertion,
+        throwsA(isA<AssertionError>()),
       );
       return true;
     }());

testing/dart/dart_test.dart

@@ -4,7 +4,7 @@
 
 import 'dart:async';
 
-import 'package:litetest/litetest.dart';
+import 'package:test/test.dart';
 
 /// Verifies Dart semantics governed by flags set by Flutter tooling.
 void main() {

testing/dart/encoding_test.dart

@@ -7,8 +7,8 @@ import 'dart:io';
 import 'dart:typed_data';
 import 'dart:ui';
 
-import 'package:litetest/litetest.dart';
 import 'package:path/path.dart' as path;
+import 'package:test/test.dart';
 
 import 'impeller_enabled.dart';
 

testing/dart/geometry_test.dart

@@ -9,7 +9,7 @@ import 'dart:math' as math show sqrt;
 import 'dart:math' show pi;
 import 'dart:ui';
 
-import 'package:litetest/litetest.dart';
+import 'package:test/test.dart';
 
 void main() {
   test('OffsetBase.>=', () {
@@ -47,8 +47,8 @@ void main() {
 
   test('OffsetBase.==', () {
     expect(const Offset(0, 0), equals(const Offset(0, 0)));
-    expect(const Offset(0, 0), notEquals(const Offset(1, 0)));
-    expect(const Offset(0, 0), notEquals(const Offset(0, 1)));
+    expect(const Offset(0, 0), isNot(const Offset(1, 0)));
+    expect(const Offset(0, 0), isNot(const Offset(0, 1)));
   });
 
   test('Offset.direction', () {
@@ -392,28 +392,28 @@ void main() {
         const Rect.fromLTRB(10.0, 20.0, 30.0, 40.0),
         topLeft: const Radius.circular(-1),
       );
-    }, throwsA(isInstanceOf<AssertionError>()));
+    }, throwsA(const isInstanceOf<AssertionError>()));
 
     expect(() {
       RRect.fromRectAndCorners(
         const Rect.fromLTRB(10.0, 20.0, 30.0, 40.0),
         topRight: const Radius.circular(-2),
       );
-    }, throwsA(isInstanceOf<AssertionError>()));
+    }, throwsA(const isInstanceOf<AssertionError>()));
 
     expect(() {
       RRect.fromRectAndCorners(
         const Rect.fromLTRB(10.0, 20.0, 30.0, 40.0),
         bottomLeft: const Radius.circular(-3),
       );
-    }, throwsA(isInstanceOf<AssertionError>()));
+    }, throwsA(const isInstanceOf<AssertionError>()));
 
     expect(() {
       RRect.fromRectAndCorners(
         const Rect.fromLTRB(10.0, 20.0, 30.0, 40.0),
         bottomRight: const Radius.circular(-4),
       );
-    }, throwsA(isInstanceOf<AssertionError>()));
+    }, throwsA(const isInstanceOf<AssertionError>()));
   });
 
   test('RRect.inflate clamps when deflating past zero', () {

testing/dart/gesture_settings_test.dart

@@ -4,7 +4,7 @@
 
 import 'dart:ui';
 
-import 'package:litetest/litetest.dart';
+import 'package:test/test.dart';
 
 void main() {
   test('GestureSettings has a reasonable toString', () {
@@ -23,11 +23,11 @@ void main() {
     expect(settingsA, equals(settingsC));
     expect(settingsC, equals(settingsA));
 
-    expect(settingsA, notEquals(settingsB));
-    expect(settingsC, notEquals(settingsB));
+    expect(settingsA, isNot(settingsB));
+    expect(settingsC, isNot(settingsB));
 
-    expect(settingsB, notEquals(settingsA));
-    expect(settingsB, notEquals(settingsC));
+    expect(settingsB, isNot(settingsA));
+    expect(settingsB, isNot(settingsC));
   });
 
   test('GestureSettings copyWith preserves already set values', () {

testing/dart/gpu_test.dart

@@ -7,7 +7,7 @@
 import 'dart:typed_data';
 import 'dart:ui' as ui;
 
-import 'package:litetest/litetest.dart';
+import 'package:test/test.dart';
 
 import '../../lib/gpu/lib/gpu.dart' as gpu;
 import 'impeller_enabled.dart';