@Test
public void numbersOccurringOddNumberOfTimes() throws Exception {
assertThat(arrayOperations.numbersOccurringOddNumberOfTimes(null), is(new int[0]));
assertThat(arrayOperations.numbersOccurringOddNumberOfTimes(new int[0]), is(new int[0]));
assertThat(arrayOperations.numbersOccurringOddNumberOfTimes(new int[] {1, 1}), is(new int[0]));
assertThat(
arrayOperations.numbersOccurringOddNumberOfTimes(new int[] {1, 2, 2}), is(new int[] {1}));
assertThat(
arrayOperations.numbersOccurringOddNumberOfTimes(new int[] {1, 1, 2, 3, 3}),
is(new int[] {2}));
assertThat(
arrayOperations.numbersOccurringOddNumberOfTimes(new int[] {1, 1, 2, 2, 3, 4, 5}),
is(new int[] {3, 4, 5}));
assertThat(
arrayOperations.numbersOccurringOddNumberOfTimes(new int[] {1, 1, 2, 2, 3, 3, 5, 5, 5}),
is(new int[] {5}));
}
