public void TransformStack_TranlateSaveRestore_Verify()
{
using (var context = new Eto.Wpf.Platform().Context)
{
var current = Matrix.Create();
var stack = new Stack <IMatrix>();
Action <IMatrix> push = m => {
stack.Push(current);
m.Append(current);
current = m;
};
Action pop = () => current = stack.Pop();
var target = new TransformStack(push, pop);
Assert.IsTrue(MatrixTests.Equals(current, 1f, 0f, 0f, 1f, 0f, 0f));
target.SaveTransform(); // Save
target.TranslateTransform(5f, 5f);
Assert.IsTrue(MatrixTests.Equals(current, 1f, 0f, 0f, 1f, 5f, 5f));
target.SaveTransform();
target.TranslateTransform(10f, 10f);
Assert.IsTrue(MatrixTests.Equals(current, 1f, 0f, 0f, 1f, 15f, 15f));
target.RestoreTransform();
Assert.IsTrue(MatrixTests.Equals(current, 1f, 0f, 0f, 1f, 5f, 5f));
target.RestoreTransform();
Assert.IsTrue(MatrixTests.Equals(current, 1f, 0f, 0f, 1f, 0f, 0f));
}
}
