public void When_DrawFunctionPlotWithConstantFunction_ShouldDrawFunctionPlot()
{
//Arrange
const int width = 800;
const int height = 600;
var yValue = Math.Round(1d, 2);
var maxY = (yValue + _functionPlotterViewModel.MaxY).ToString(CultureInfo.InvariantCulture);
var minY = (yValue + _functionPlotterViewModel.MinY).ToString(CultureInfo.InvariantCulture);
var functionPoints = new List <PointF>
{
new PointF(-1, 1),
new PointF(0, 1),
new PointF(1, 1)
};
var integralRectangles = new List <(PointF, PointF)>
{
(new PointF(-1, 1), new PointF(0, 0)),
(new PointF(0, 1), new PointF(1, 0))
};
_painterMock.Setup(x => x.DrawAxis(It.IsAny <int>()));
_painterMock.Setup(x => x.DrawFunction(It.IsAny <List <PointF> >()));
_painterMock.Setup(x => x.ResetTransform());
_painterMock.Setup(x => x.DrawString(It.IsAny <PointF>(), It.IsAny <string>(), It.IsAny <int>()));
_functionMock
.Setup(x => x.GetFunctionGraph(It.IsAny <double>(), It.IsAny <double>(), It.IsAny <double>()))
.Returns(functionPoints);
//Act
_functionPlotter.DrawFunctionPlot(width, height);
//Assert
const int twice = 2;
_painterMock.Verify(x => x.DrawAxis(It.IsAny <int>()), Times.Once);
_painterMock.Verify(x => x.DrawFunction(It.IsAny <List <PointF> >()), Times.Once);
_painterMock.Verify(x => x.ResetTransform(), Times.Exactly(twice));
_painterMock.Verify(x => x.DrawString(It.IsAny <PointF>(), minY, It.IsAny <int>()), Times.Once);
_painterMock.Verify(x => x.DrawString(It.IsAny <PointF>(), maxY, It.IsAny <int>()), Times.Once);
}
public void Draw(int width, int height)
{
Ensure.Arg(width)
.IsGreaterThan(0);
Ensure.Arg(height)
.IsGreaterThan(0);
if (PlotterViewModel.DrawIntegral)
{
_plotter.DrawIntegralFunctionPlot(width, height);
}
else
{
_plotter.DrawFunctionPlot(width, height);
}
FunctionImage.Source = _plotter.GetFunctionImage();
Ensure.Arg(FunctionImage.Source).IsNotNull();
}