@Test
public void testSelect() {
for (int i = 0; i < 100; i++) {
intColumn.add(i);
}
IntPredicate predicate = value -> value < 10;
IntColumn column1 = intColumn.selectIf(predicate);
assertEquals(10, column1.size());
IntColumn column2 = intColumn.select(intColumn.select(predicate));
assertEquals(10, column2.size());
for (int i = 0; i < 10; i++) {
assertTrue(column1.get(i) < 10);
}
for (int i = 0; i < 10; i++) {
assertTrue(column2.get(i) < 10);
}
}
@Test
public void testDifference() {
int[] originalValues = new int[] {32, 42, 40, 57, 52};
int[] expectedValues = new int[] {IntColumn.MISSING_VALUE, 10, -2, 17, -5};
IntColumn initial = new IntColumn("Test", originalValues.length);
for (int value : originalValues) {
initial.add(value);
}
IntColumn difference = initial.difference();
assertEquals(
"Both sets of data should be the same size.", expectedValues.length, difference.size());
for (int index = 0; index < difference.size(); index++) {
int actual = difference.get(index);
assertEquals(
"difference operation at index:" + index + " failed", expectedValues[index], actual);
}
}