public void FailsForCollinearPoints()
{
var tests = new[,]
{
{new Vector(), new Vector(), new Vector()},
{new Vector(-1000, -1000), new Vector(), new Vector(1000, 1000)},
{new Vector(123, 0), new Vector(234, 0), new Vector(345, 0)},
{new Vector(0, 123), new Vector(0, 234), new Vector(0, 345)}
};
for (int i = 0; i < tests.GetLength(0); i++)
{
Assert.Throws(typeof(CollinearPointsException), () => { Helpers.CircleCenter(tests[i, 0], tests[i, 1], tests[i, 2]); });
}
}
public void CorrectlyIdentifiesDivergingScenarios()
{
// Sweepline at 0 for all these tests.
var tests = new[,]
{
{new Vector(-1, 0), new Vector(1, 0), new Vector(3, 0)},
{new Vector(1, 0), new Vector(3, 1), new Vector(5, 9)},
{new Vector(1, 1), new Vector(2, 2), new Vector(3, 3)},
{new Vector(1, 1), new Vector(3, 2), new Vector(4, 7)}
};
for (int i = 0; i < tests.GetLength(0); i++)
Assert.That(Helpers.TestBreakpointsConvergence(tests[i, 0], tests[i, 1], tests[i, 2]), Is.False, string.Format(
"Expected Helpers.TestBreakpointsConvergence() to report that the arcs defined from left to right by the sites {0}, {1}, and {2} diverged, but it reported that they converged.",
tests[i, 0],
tests[i, 1],
tests[i, 2]));
}
public void ReturnsCorrectCenter()
{
// First three vectors are inputs, last is expected output.
var tests = new[,]
{
{new Vector(0, 0), new Vector(0, 10), new Vector(10, 0), new Vector(5, 5)},
{new Vector(-1,0), new Vector(0, 1), new Vector(1, 0), new Vector(0, 0)},
{new Vector(0, 10), new Vector(10, 0), new Vector(10, 30), new Vector(15, 15)}
};
for (int i = 0; i < tests.GetLength(0); i++)
{
var output = Helpers.CircleCenter(tests[i, 0], tests[i, 1], tests[i, 2]);
Assert.That(output == tests[i, 3], Is.True, string.Format("For inputs {0}, {1}, {2} expected output {3} but output was {4}.",
tests[i, 0],
tests[i, 1],
tests[i, 2],
tests[i, 3],
output));
}
}