public void ReturnsRightOnRightAngleOppSideA()
{
var info1 = TriangleChecker.GetTriangleStats(5, 3, 4);
var info2 = TriangleChecker.GetTriangleStats(5, 4, 3);
Assert.AreEqual(TriangleAngle.Right, info1.Angle);
Assert.AreEqual(TriangleAngle.Right, info2.Angle);
}
public void ReturnsObtuseOnObtuseAngleOppSideC()
{
var info1 = TriangleChecker.GetTriangleStats(3, 4, 6);
var info2 = TriangleChecker.GetTriangleStats(4, 3, 6);
Assert.AreEqual(TriangleAngle.Obtuse, info1.Angle);
Assert.AreEqual(TriangleAngle.Obtuse, info2.Angle);
}
public void ReturnsAcuteWhenOneLegIsZero()
{
var info1 = TriangleChecker.GetTriangleStats(0, 1, 1);
var info2 = TriangleChecker.GetTriangleStats(1, 0, 1);
var info3 = TriangleChecker.GetTriangleStats(1, 1, 0);
Assert.AreEqual(TriangleAngle.Acute, info1.Angle);
Assert.AreEqual(TriangleAngle.Acute, info2.Angle);
Assert.AreEqual(TriangleAngle.Acute, info3.Angle);
}
public void ReturnsObtuseWhenTwoLegsEqualThird()
{
var info1 = TriangleChecker.GetTriangleStats(2, 1, 1);
var info2 = TriangleChecker.GetTriangleStats(1, 2, 1);
var info3 = TriangleChecker.GetTriangleStats(1, 1, 2);
Assert.AreEqual(TriangleAngle.Obtuse, info1.Angle);
Assert.AreEqual(TriangleAngle.Obtuse, info2.Angle);
Assert.AreEqual(TriangleAngle.Obtuse, info3.Angle);
}
public void ReturnsRightOnLargeDiffBetweenLegs()
{
// One angle is 90 degrees, one is very close to 90, and one is very close to zero
var info1 = TriangleChecker.GetTriangleStats(30000.00002, 30000, 1);
var info2 = TriangleChecker.GetTriangleStats(1, 30000.00002, 30000);
var info3 = TriangleChecker.GetTriangleStats(30000, 1, 30000.00002);
Assert.AreEqual(TriangleAngle.Right, info1.Angle);
Assert.AreEqual(TriangleAngle.Right, info2.Angle);
Assert.AreEqual(TriangleAngle.Right, info3.Angle);
}
public void ReturnsAcuteOnVeryCloseToRightAngle()
{
// two of the angles are roughly 89.999 degrees, making the third almost zero
var info1 = TriangleChecker.GetTriangleStats(1, 30000, 30000);
var info2 = TriangleChecker.GetTriangleStats(30000, 1, 30000);
var info3 = TriangleChecker.GetTriangleStats(30000, 30000, 1);
Assert.AreEqual(TriangleAngle.Acute, info1.Angle);
Assert.AreEqual(TriangleAngle.Acute, info2.Angle);
Assert.AreEqual(TriangleAngle.Acute, info3.Angle);
}
public void ReturnsObtuseOnLargeObtuseAngle()
{
// the obtuse angle is roughly 179.5 degrees (triangle is almost flat)
var info1 = TriangleChecker.GetTriangleStats(20, 10.0001, 10.0001);
var info2 = TriangleChecker.GetTriangleStats(10.0001, 20, 10.0001);
var info3 = TriangleChecker.GetTriangleStats(10.0001, 10.0001, 20);
Assert.AreEqual(TriangleAngle.Obtuse, info1.Angle);
Assert.AreEqual(TriangleAngle.Obtuse, info2.Angle);
Assert.AreEqual(TriangleAngle.Obtuse, info3.Angle);
}
public void ReturnsScaleneOnNoEqualSides()
{
var info = TriangleChecker.GetTriangleStats(2, 3, 4);
Assert.AreEqual(TriangleType.Scalene, info.Type);
}
public void ReturnsIsoscelesOnCAEqual()
{
var info = TriangleChecker.GetTriangleStats(2, 1, 2);
Assert.AreEqual(TriangleType.Isosceles, info.Type);
}
public void ReturnsEquilateralOnAllEqualSides()
{
var info = TriangleChecker.GetTriangleStats(1, 1, 1);
Assert.AreEqual(TriangleType.Equilateral, info.Type);
}
public void ThrowsExceptionOnCGreaterThanAB()
{
Assert.ThrowsException <InvalidTriangleException>(() => TriangleChecker.GetTriangleStats(1, 1, 3));
}
public void ThrowsExceptionOnAGreaterThanBC()
{
Assert.ThrowsException <InvalidTriangleException>(() => TriangleChecker.GetTriangleStats(3, 1, 1));
}
public void ThrowsExceptionOnNegativeSideC()
{
Assert.ThrowsException <ArgumentException>(() => TriangleChecker.GetTriangleStats(1, 1, -1));
}
public void ReturnsAcuteOnAllAnglesLessThan90()
{
var info = TriangleChecker.GetTriangleStats(3, 3, 2);
Assert.AreEqual(TriangleAngle.Acute, info.Angle);
}
