public void ToScreenCoordinates_CoordinateNull_ThrowArgumentNullException()
{
// Setup
var worldFile = new WorldFile(1.0, 0.0, 0.0, 1.0, 0.0, 0.0);
// Call
TestDelegate call = () => worldFile.ToScreenCoordinates(null);
// Assert
string paramName = Assert.Throws <ArgumentNullException>(call).ParamName;
Assert.AreEqual("point", paramName);
}
public void GivenScreenSpaceCoordinate_WhenDoingRoundtripTransformation_ThenScreenSpaceCoordinateRemainsUnchanged()
{
// Given
const double a11 = 1.1;
const double a21 = 2.2;
const double a12 = 3.3;
const double a22 = 4.4;
const double transformationX = 5.5;
const double transformationY = 6.6;
var worldFile = new WorldFile(a11, a21, a12, a22, transformationX, transformationY);
const int x = 20;
const int y = 17;
// When
Coordinate worldCoordinate = worldFile.ToWorldCoordinates(x, y);
Point screenCoordinate = worldFile.ToScreenCoordinates(worldCoordinate);
// Assert
Assert.AreEqual(x, screenCoordinate.X);
Assert.AreEqual(y, screenCoordinate.Y);
}