@Test
public void given_two_collections_should_iterate_over_all_elements_after_joining() {
Iterable<String> strings = Iterables.join(Arrays.asList("1"), Arrays.asList("2", "3"));
int i = 1;
for (String s : strings) {
Assert.assertEquals(Integer.toString(i++), s);
}
strings = Iterables.join(Arrays.asList("1", "2"), Arrays.asList("3"));
i = 1;
for (String s : strings) {
Assert.assertEquals(Integer.toString(i++), s);
}
}
@Test
public void
given_two_collections_with_one_empty_should_iterate_over_all_elements_of_other_collection() {
Iterable<String> strings =
Iterables.join(Collections.<String>emptyList(), Arrays.asList("1", "2"));
int i = 1;
for (String s : strings) {
Assert.assertEquals(Integer.toString(i++), s);
}
strings = Iterables.join(Arrays.asList("1", "2"), Collections.<String>emptyList());
i = 1;
for (String s : strings) {
Assert.assertEquals(Integer.toString(i++), s);
}
}
@Test
public void given_two_collections_both_empty_should_not_iterate_over_anything() {
Iterable<String> strings =
Iterables.join(Collections.<String>emptyList(), Collections.<String>emptyList());
for (String s : strings) {
Assert.fail("should be no items: " + s);
}
}
