@Test
public void gridChangingSelectionModel_firesSelectionChangeEvent() {
Grid<String> customGrid = new Grid<>();
customGrid.setItems("Foo", "Bar", "Baz");
List<String> selectionChanges = new ArrayList<>();
((SingleSelectionModelImpl<String>) customGrid.getSelectionModel())
.addSingleSelectionListener(e -> selectionChanges.add(e.getValue()));
customGrid.getSelectionModel().select("Foo");
assertEquals("Foo", customGrid.getSelectionModel().getFirstSelectedItem().get());
assertEquals(Arrays.asList("Foo"), selectionChanges);
customGrid.setSelectionMode(SelectionMode.MULTI);
assertEquals(Arrays.asList("Foo", null), selectionChanges);
}
@Before
public void setUp() {
grid = new Grid<>();
grid.setItems(PERSON_A, PERSON_B, PERSON_C);
selectionModel = (SingleSelectionModelImpl<Person>) grid.getSelectionModel();
selectionChanges = new ArrayList<>();
selectionModel.addSingleSelectionListener(e -> selectionChanges.add(e.getValue()));
}
@Test
public void serverSideSelection_GridChangingSelectionModel_sendsUpdatedRowsToClient() {
CustomSingleSelectionModel customModel = new CustomSingleSelectionModel();
Grid<String> customGrid =
new Grid<String>() {
{
setSelectionModel(customModel);
}
};
customGrid.setItems("Foo", "Bar", "Baz");
customGrid.getDataCommunicator().beforeClientResponse(true);
Assert.assertFalse(
"Item should have been updated as selected", customModel.generatedData.get("Foo"));
Assert.assertFalse(
"Item should have been updated as NOT selected", customModel.generatedData.get("Bar"));
Assert.assertFalse(
"Item should have been updated as NOT selected", customModel.generatedData.get("Baz"));
customModel.generatedData.clear();
customGrid.getSelectionModel().select("Foo");
customGrid.getDataCommunicator().beforeClientResponse(false);
Assert.assertTrue(
"Item should have been updated as selected", customModel.generatedData.get("Foo"));
Assert.assertFalse(
"Item should have NOT been updated", customModel.generatedData.containsKey("Bar"));
Assert.assertFalse(
"Item should have NOT been updated", customModel.generatedData.containsKey("Baz"));
// switch to another selection model to cause event
customModel.generatedData.clear();
customGrid.setSelectionMode(SelectionMode.MULTI);
customGrid.getDataCommunicator().beforeClientResponse(false);
// since the selection model has been removed, it is no longer a data
// generator for the data communicator, would need to verify somehow
// that row is not marked as selected anymore ? (done in UI tests)
Assert.assertTrue(customModel.generatedData.isEmpty()); // at least
// removed
// selection
// model is not
// triggered
}
@Test
public void testGridWithSingleSelection() {
Grid<String> gridWithStrings = new Grid<>();
gridWithStrings.setItems("Foo", "Bar", "Baz");
GridSelectionModel<String> model = gridWithStrings.getSelectionModel();
Assert.assertFalse(model.isSelected("Foo"));
model.select("Foo");
Assert.assertTrue(model.isSelected("Foo"));
Assert.assertEquals(Optional.of("Foo"), model.getFirstSelectedItem());
model.select("Bar");
Assert.assertFalse(model.isSelected("Foo"));
Assert.assertTrue(model.isSelected("Bar"));
model.deselect("Bar");
Assert.assertFalse(model.isSelected("Bar"));
Assert.assertFalse(model.getFirstSelectedItem().isPresent());
}