@Test
public void should_preserve_order_of_elements_having_same_value_in_column() {
// given
List<Something> rows = TestUtils.load("2");
Sorter sorter = new Sorter(Arrays.asList(fooColumn), Arrays.asList(SortOrder.ASC));
// when
List<?> processedRows = sorter.process(rows);
// then
assertThat(processedRows).isEqualTo(TestUtils.load("2_foo_asc"));
}
@Test
public void should_sort_by_one_column_desc() {
// given
List<Something> rows = TestUtils.load("1");
Sorter sorter = new Sorter(Arrays.asList(fooColumn), Arrays.asList(SortOrder.DESC));
// when
List<?> processedRows = sorter.process(rows);
// then
assertThat(processedRows).isEqualTo(TestUtils.load("1_foo_desc"));
}
@Test
public void should_not_change_order_of_input_rows() {
// given
List<Something> rows = TestUtils.load("1");
Sorter sorter = new Sorter(Arrays.asList(fooColumn), Arrays.asList(SortOrder.ASC));
// when
sorter.process(rows);
// then
assertThat(rows).isEqualTo(TestUtils.load("1"));
}
@Test
@SuppressWarnings("unchecked")
public void should_do_nothing_if_there_are_no_sortable_columns() {
// given
Sorter sorter = new Sorter(Collections.EMPTY_LIST, Collections.EMPTY_LIST);
List<Something> rows = TestUtils.load("4");
// when
List<?> processed = sorter.process(rows);
// then
assertThat(processed).isSameAs(rows);
}
@Test
public void should_sort_by_two_columns_both_asc() {
// given
List<Something> rows = TestUtils.load("2");
Sorter sorter =
new Sorter(
Arrays.asList(fooColumn, barColumn), Arrays.asList(SortOrder.ASC, SortOrder.ASC));
// when
List<?> processedRows = sorter.process(rows);
// then
assertThat(processedRows).isEqualTo(TestUtils.load("2_foo_asc_bar_asc"));
}
@Test
public void should_accept_custom_value_accessor() {
// given
Sorter sorter =
new Sorter(
Arrays.asList(new Column(Types.text(), "foo", new ReversingValueAccessor())),
Arrays.asList(SortOrder.ASC));
List<Something> rows = TestUtils.load("3");
// when
List<?> processedRows = sorter.process(rows);
// then
assertThat(processedRows).isEqualTo(TestUtils.load("3_foo_asc_revacc"));
}