@Test
public void testSliceNormal() {
double[] arr1 = new double[] {2, 3, 4, 5, 6};
double[] arr2 = new double[] {4, 5, 6};
double[] arr3 = new double[] {2, 3, 4};
DoubleVector vec1 = new DenseDoubleVector(arr1);
assertArrayEquals(arr2, vec1.slice(2, 4).toArray(), 0.000001);
DoubleVector vec2 = new DenseDoubleVector(arr1);
assertArrayEquals(arr3, vec2.slice(3).toArray(), 0.000001);
}
@Test(expected = IllegalArgumentException.class)
public void testSliceWithNegativeLength() {
double[] vals1 = {1, 2, 3, 4, 5, 6, 7, 8};
DoubleVector vec1 = new DenseDoubleVector(vals1);
vec1.slice(3, 2);
}
@Test(expected = IllegalArgumentException.class)
public void testSliceWithOutofBounds() {
double[] vals = {1, 2, 3, 4, 5, 6, 7, 8};
DoubleVector vec = new DenseDoubleVector(vals);
vec.slice(1, 9);
}
@Test(expected = IllegalArgumentException.class)
public void testSliceWithNegativeIndices() {
double[] vals = {1, 2, 3, 4, 5, 6, 7, 8};
DoubleVector vec = new DenseDoubleVector(vals);
vec.slice(-1, -9);
}
@Test(expected = IllegalArgumentException.class)
public void testSliceAbnormalStartLargerThanEnd() {
double[] arr1 = new double[] {2, 3, 4, 5, 6};
DoubleVector vec = new DenseDoubleVector(arr1);
vec.slice(4, 3);
}
@Test(expected = IllegalArgumentException.class)
public void testSliceAbnormalEndTooLarge() {
double[] arr1 = new double[] {2, 3, 4, 5, 6};
DoubleVector vec = new DenseDoubleVector(arr1);
vec.slice(2, 5);
}