@Test(expected = IllegalArgumentException.class)
public void testSubtractAbnormal() {
double[] arr1 = new double[] {1, 2, 3};
double[] arr2 = new double[] {4, 5};
DoubleVector vec1 = new DenseDoubleVector(arr1);
DoubleVector vec2 = new DenseDoubleVector(arr2);
vec1.subtract(vec2);
}
@Test(expected = IllegalArgumentException.class)
public void testSubtractWithException() {
double[] vals1 = {1, 2, 3, 4, 5, 6, 7, 8};
double[] vals2 = {8, 7, 6, 5, 4, 3, 2, 1, 0};
DoubleVector vec1 = new DenseDoubleVector(vals1);
DoubleVector vec2 = new DenseDoubleVector(vals2);
vec1.subtract(vec2);
}
@Test
public void testSubtractNormal() {
double[] arr1 = new double[] {1, 2, 3};
double[] arr2 = new double[] {4, 5, 6};
DoubleVector vec1 = new DenseDoubleVector(arr1);
DoubleVector vec2 = new DenseDoubleVector(arr2);
double[] arrExp = new double[] {-3, -3, -3};
assertArrayEquals(arrExp, vec1.subtract(vec2).toArray(), 0.000001);
}