public void Slope_FlatSlope_Returns0()
{
Line2D sut = new Line2D(new Point(0, 0), new Point(4, 0));
decimal result = sut.Slope();
result.ShouldBe((decimal)0);
}
public void Slope_AtypicalSlope_ReturnsSlope()
{
Line2D sut = new Line2D(new Point(0, 0), new Point(4, 4));
decimal result = sut.Slope();
result.ShouldBe((decimal)1);
}
public void IntersectsWith_ParrallelLines_ReturnsFalse()
{
Line2D line1 = new Line2D(new Point(0, 0), new Point(1, 1));
Line2D line2 = new Line2D(new Point(0, 1), new Point(1, 2));
bool result = line1.IntersectsWith(line2);
result.ShouldBe(false);
}
public void IntersectsWith_IntersectingLines_ReturnsTrue()
{
Line2D line1 = new Line2D(new Point(0, 0), new Point(1, 1));
Line2D line2 = new Line2D(new Point(0, 4), new Point(1, 0));
bool result = line1.IntersectsWith(line2);
result.ShouldBe(true);
}
public void IntersectsWith_IdenticalPointsInConstructor_InvalidArgumentException()
{
bool didThrow = false;
try
{
Line2D sut = new Line2D(new Point(0, 0), new Point(0, 0));
}
catch (ArgumentException)
{
didThrow = true;
}
didThrow.ShouldBe(true);
}
public void Slope_InfiniteSlope_ReturnsSlope()
{
Line2D sut = new Line2D(new Point(0, 0), new Point(0, 4));
bool thrown = false;
try
{
sut.Slope();
}
catch (DivideByZeroException)
{
thrown = true;
}
thrown.ShouldBe(true);
}
public bool IntersectsWith(Line2D otherLine)
{
return Slope() != otherLine.Slope();
}
