public void ShouldCreateUnitVectorFromGivenAngle()
{
float angle = (float)Math.PI / 2;
PVector vectorA = PVector.FromAngle(angle);
float calculatedAngle = vectorA.Heading();
float calculatedMagnitude = vectorA.Mag();
Assert.Equal(angle, calculatedAngle);
float diff = (float)Math.Abs(1f - calculatedMagnitude);
Assert.True(diff < ROUNDING_ERROR);
angle = (float)Math.PI / 4;
vectorA = PVector.FromAngle(angle);
calculatedAngle = vectorA.Heading();
calculatedMagnitude = vectorA.Mag();
Assert.Equal(angle, calculatedAngle);
diff = (float)Math.Abs(1f - calculatedMagnitude);
Assert.True(diff < ROUNDING_ERROR);
}