public void Shift_WithOffset2X0Y_After2Seconds_ShouldBe4X0Y()
{
// Arrange
const int elapsedSeconds = 2;
DateTime last = new DateTime(2018, 07, 01, 12, 0, 15);
DateTime now = last.AddSeconds(elapsedSeconds);
Offset shiftPerSecond = new Offset(2, 0);
Offset expected = new Offset(4, 0);
// Act
var shiftOverTime = shiftPerSecond.Extend(last, now);
// Assert
Assert.Equal(expected.Left, shiftOverTime.Left);
Assert.Equal(expected.Top, shiftOverTime.Top);
}
public void Shift_WithOffset6X0y_AfterHalfASecond_ShouldBe3X0Y()
{
// Arrange
const double elapsedSeconds = 0.5;
DateTime last = new DateTime(2018, 07, 01, 12, 0, 15);
DateTime now = last.AddSeconds(elapsedSeconds);
Offset shiftPerSecond = new Offset(6, 0);
Offset expected = new Offset(3, 0);
// Act
var shiftOverTime = shiftPerSecond.Extend(last, now);
// Assert
Assert.Equal(expected.Left, shiftOverTime.Left);
Assert.Equal(expected.Top, shiftOverTime.Top);
}