add test

Author: yjbanov

lib/web_ui/test/engine/vector_math_test.dart

@@ -0,0 +1,45 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:typed_data';
+
+import 'package:test/bootstrap/browser.dart';
+import 'package:test/test.dart';
+
+import 'package:ui/src/engine/vector_math.dart';
+
+void main() {
+  internalBootstrapBrowserTest(() => testMain);
+}
+
+void testMain() {
+  test('toMatrix32', () {
+    final List<double> data = <double>[
+      1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16
+    ];
+    final Float32List m32 = toMatrix32(Float64List.fromList(data));
+    expect(m32, Float32List.fromList(data));
+  });
+
+  test('FastMatrix32.transform', () {
+    final FastMatrix32 fast = FastMatrix32(Float32List.fromList(<double>[
+      2, 1, 0, 0,
+      1, 3, 0, 0,
+      0, 0, 0, 0,
+      4, 5, 0, 1
+    ]));
+    fast.transform(6, 7);
+
+    // Just make sure that the fast version produces a result consistent with
+    // the slow version.
+    final Matrix4 slow = Matrix4.fromFloat32List(fast.matrix);
+    final Float32List slowTransformed = Float32List.fromList(<double>[
+      6, 7, 0
+    ]);
+    slow.transform3(slowTransformed);
+
+    expect(fast.transformedX, slowTransformed[0]);
+    expect(fast.transformedY, slowTransformed[1]);
+  });
+}