public void ExecuteDrawingInstruction()
{
var repositoryMock = new Mock <IDrawingInstructionRepository>();
var instruction = new ClearInstruction();
instruction.ExecuteDrawingInstruction(repositoryMock.Object);
repositoryMock.Verify(mock => mock.Clear(), Times.Once);
}
public void ExecuteDrawingInstructionPassNull()
{
var instruction = new ClearInstruction();
Assert.Throws <ArgumentNullException>(() => instruction.ExecuteDrawingInstruction(null));
}