public void IsRectangular_WithNonRectangularTriangle_ReturnsFalse()
{
// Arrange
TriangleByThreeSides sut = new TriangleByThreeSides(3.0, 4.0, 6.0);
// Act
bool actual = sut.IsRectangular();
// Assert
actual.Should().BeFalse();
}
public void IsRectangular_CalledWithNull_ThrowsArgumentNullException()
{
// Arrange
TriangleByThreeSides sut = null;
// Act
Action act = () => sut.IsRectangular();
// Assert
act.Should().Throw <ArgumentException>()
.WithMessage("*Argument 'triangle' can not be 'null'.");
}