public void TestArgsort()
{
int[] args = ArrayUtils.Argsort(new int[] { 11, 2, 3, 7, 0 });
Assert.IsTrue(Arrays.AreEqual(new int[] { 4, 1, 2, 3, 0 }, args));
args = ArrayUtils.Argsort(new int[] { 11, 2, 3, 7, 0 }, -1, -1);
Assert.IsTrue(Arrays.AreEqual(new int[] { 4, 1, 2, 3, 0 }, args));
args = ArrayUtils.Argsort(new int[] { 11, 2, 3, 7, 0 }, 0, 3);
Assert.IsTrue(Arrays.AreEqual(new int[] { 4, 1, 2 }, args));
// Test double version
int[] d_args = ArrayUtils.Argsort(new double[] { 11, 2, 3, 7, 0 }, 0, 3);
Assert.IsTrue(Arrays.AreEqual(new int[] { 4, 1, 2 }, d_args));
d_args = ArrayUtils.Argsort(new double[] { 11, 2, 3, 7, 0 }, -1, 3);
Assert.IsTrue(Arrays.AreEqual(new int[] { 4, 1, 2, 3, 0 }, d_args));
}