public void Area()
{
var expected = 1.5;
var p1 = new Point2double(0, 0);
var p2 = new Point2double(1, 1);
var p3 = new Point2double(3, 0);
var actual = new Triangle2double(p1, p2, p3).Area();
Assert.Equal(expected, actual);
}
public void EqualsTriangle2doubleTrue()
{
var p1 = new Point2double(1, 2);
var p2 = new Point2double(3, 4);
var p3 = new Point2double(5, 6);
var t1 = new Triangle2double(p1, p2, p3);
var t2 = new Triangle2double(p1, p2, p3);
Assert.True(t1.Equals(t2));
}
public void GetHashCodeTest()
{
var expected = 2145648640;
var p1 = new Point2double(1, 2);
var p2 = new Point2double(3, 4);
var p3 = new Point2double(5, 6);
var actual = new Triangle2double(p1, p2, p3).GetHashCode();
Assert.Equal(expected, actual);
}
public void ToStringTest()
{
var expected = "((1, 2), (3, 4), (5, 6))";
var p1 = new Point2double(1, 2);
var p2 = new Point2double(3, 4);
var p3 = new Point2double(5, 6);
var actual = new Triangle2double(p1, p2, p3).ToString();
Assert.Equal(expected, actual);
}
public void OperatorNotEqualsFalse()
{
var p1 = new Point2double(1, 2);
var p2 = new Point2double(3, 4);
var p3 = new Point2double(5, 6);
var t1 = new Triangle2double(p1, p2, p3);
var t2 = new Triangle2double(p1, p2, p3);
Assert.False(t1 != t2);
}
public void Triangle2doubleConstructor()
{
var p1 = new Point2double(1, 2);
var p2 = new Point2double(3, 4);
var p3 = new Point2double(5, 6);
var actual = new Triangle2double(p1, p2, p3);
Assert.Equal(p1, actual.P1);
Assert.Equal(p2, actual.P2);
Assert.Equal(p3, actual.P3);
}
public void EqualsObjectFalse()
{
var p1 = new Point2double(1, 2);
var p2 = new Point2double(3, 4);
var p3 = new Point2double(5, 6);
var p4 = new Point2double(7, 8);
var t1 = new Triangle2double(p1, p2, p3);
var t2 = new Triangle2double(p1, p2, p4);
Assert.False(t1.Equals((object)t2));
}
public static double Area(this Triangle2double t) =>
0.5 * Math.Abs(
(t.P1.X - t.P3.X) *
(t.P2.Y - t.P1.Y) -
(t.P1.X - t.P2.X) *
(t.P3.Y - t.P1.Y));
