public void testSelectionReflectsIndexAfterClear() {
ValueModel selectionHolder = new ValueHolder();
SelectionInList<String> sil =
new SelectionInList<String>(new ValueHolder(listModel, true), selectionHolder);
sil.setSelectionIndex(1);
PropertyChangeReport changeReport = new PropertyChangeReport();
sil.addPropertyChangeListener(SelectionInList.PROPERTYNAME_SELECTION, changeReport);
assertEquals(
"SelectionHolder holds the second list element.",
listModel.get(1),
selectionHolder.getValue());
listModel.clear();
assertEquals("The selection index is -1.", -1, sil.getSelectionIndex());
assertEquals("The selection is null.", null, sil.getSelection());
assertEquals("The selection holder value is null.", null, sil.getSelectionHolder().getValue());
assertEquals("A selection change event has been fired.", 1, changeReport.eventCount());
// If this event provides an old value, it should be the old value.
if (changeReport.lastOldValue() != null) {
assertEquals(
"The selection change's old value is 'two'.", "two", changeReport.lastOldValue());
}
assertEquals("The selection change new value is null.", null, changeReport.lastNewValue());
}
public void testSelectionForDirectSelectionChanges() {
SelectionInList<String> sil = new SelectionInList<String>(listModel);
PropertyChangeReport selectionEmptyReport = new PropertyChangeReport();
sil.addPropertyChangeListener(
SelectionInList.PROPERTYNAME_SELECTION_EMPTY, selectionEmptyReport);
sil.setSelection((String) listModel.getElementAt(0));
assertFalse("The selection index is 0 and not empty.", sil.isSelectionEmpty());
assertEquals(
"selectionEmpty changed from true to false.", 1, selectionEmptyReport.eventCount());
assertTrue(
"1) selectionEmpty change event oldValue == true.",
selectionEmptyReport.lastOldBooleanValue());
assertFalse(
"1) selectionEmpty change event newValue == false.",
selectionEmptyReport.lastNewBooleanValue());
sil.setSelection((String) listModel.getElementAt(1));
assertFalse("The selection index is 1 and not empty.", sil.isSelectionEmpty());
assertEquals("No selectionEmpty change event fired", 1, selectionEmptyReport.eventCount());
sil.setSelection(null);
assertTrue("The selection index is empty.", sil.isSelectionEmpty());
assertEquals(
"selectionEmpty changed from false to true.", 2, selectionEmptyReport.eventCount());
assertFalse(
"2) selectionEmpty change event oldValue == false.",
selectionEmptyReport.lastOldBooleanValue());
assertTrue(
"2) selectionEmpty change event newValue == true.",
selectionEmptyReport.lastNewBooleanValue());
}
public void testFiresSelectionChangeOnlyForSelectionChanges() {
int selectionIndex = 0;
ValueHolder indexHolder = new ValueHolder(selectionIndex);
SelectionInList<String> sil = new SelectionInList<String>(listModel);
sil.setSelectionIndexHolder(indexHolder);
// Create change reports.
PropertyChangeReport valueReport = new PropertyChangeReport();
PropertyChangeReport selectionReport = new PropertyChangeReport();
PropertyChangeReport selectionEmptyReport = new PropertyChangeReport();
PropertyChangeReport selectionIndexReport = new PropertyChangeReport();
// Register change reports for value, selection, selection index,
// and selectionEmpty
sil.addValueChangeListener(valueReport);
sil.addPropertyChangeListener(SelectionInList.PROPERTYNAME_SELECTION, selectionReport);
sil.addPropertyChangeListener(
SelectionInList.PROPERTYNAME_SELECTION_EMPTY, selectionEmptyReport);
sil.addPropertyChangeListener(
SelectionInList.PROPERTYNAME_SELECTION_INDEX, selectionIndexReport);
indexHolder.fireValueChange(null, new Integer(selectionIndex));
indexHolder.fireValueChange(new Integer(selectionIndex), null);
indexHolder.fireValueChange(null, null);
assertEquals("No value change event fired", 0, valueReport.eventCount());
assertEquals("No selection change event fired", 0, selectionReport.eventCount());
assertEquals("No selectionEmpty change event fired", 0, selectionEmptyReport.eventCount());
assertEquals("No selectionIndex change event fired", 0, selectionIndexReport.eventCount());
}
public void testSelectionForDirectSelectionIndexChanges() {
SelectionInList<String> sil = new SelectionInList<String>(listModel);
// Create change reports.
PropertyChangeReport valueReport = new PropertyChangeReport();
PropertyChangeReport selectionReport = new PropertyChangeReport();
PropertyChangeReport selectionEmptyReport = new PropertyChangeReport();
PropertyChangeReport selectionIndexReport = new PropertyChangeReport();
// Register change reports for value, selection, selection index,
// and selectionEmpty
sil.addValueChangeListener(valueReport);
sil.addPropertyChangeListener(SelectionInList.PROPERTYNAME_SELECTION, selectionReport);
sil.addPropertyChangeListener(
SelectionInList.PROPERTYNAME_SELECTION_EMPTY, selectionEmptyReport);
sil.addPropertyChangeListener(
SelectionInList.PROPERTYNAME_SELECTION_INDEX, selectionIndexReport);
assertEquals("The initial value is null.", null, sil.getValue());
assertEquals("The initial selection is null.", null, sil.getSelection());
assertTrue("The initial selection is empty.", sil.isSelectionEmpty());
assertEquals("The initial selection index is -1.", -1, sil.getSelectionIndex());
sil.setSelectionIndex(0);
assertEquals(
"The new value is the first list element.", listModel.getElementAt(0), sil.getValue());
assertEquals(
"The new selection is the first list element.",
listModel.getElementAt(0),
sil.getSelection());
assertFalse("The selection is not empty.", sil.isSelectionEmpty());
assertEquals("The new selection index is 0.", 0, sil.getSelectionIndex());
assertEquals(
"selectionEmpty changed from true to false.", 1, selectionEmptyReport.eventCount());
assertTrue(
"1) selectionEmpty change event oldValue == true.",
selectionEmptyReport.lastOldBooleanValue());
assertFalse(
"1) selectionEmpty change event newValue == false.",
selectionEmptyReport.lastNewBooleanValue());
sil.setSelectionIndex(1);
assertFalse("The selection index is 1 and not empty.", sil.isSelectionEmpty());
assertEquals("No selectionEmpty change event fired", 1, selectionEmptyReport.eventCount());
sil.clearSelection();
assertTrue("The selection index is empty.", sil.isSelectionEmpty());
assertEquals(
"selectionEmpty changed from false to true.", 2, selectionEmptyReport.eventCount());
assertFalse(
"2) selectionEmpty change event oldValue == false.",
selectionEmptyReport.lastOldBooleanValue());
assertTrue(
"2) selectionEmpty change event newValue == true.",
selectionEmptyReport.lastNewBooleanValue());
}
/** Checks that list data events from an underlying are reported by the SelectionInList. */
public static void testFiresListModelListDataEvents() {
PropertyChangeReport changeReport = new PropertyChangeReport();
ListDataReport listDataReport1 = new ListDataReport();
ListDataReport listDataReport2 = new ListDataReport();
ArrayListModel<String> arrayListModel = new ArrayListModel<String>();
SelectionInList<String> sil = new SelectionInList<String>((ListModel) arrayListModel);
arrayListModel.addListDataListener(listDataReport1);
sil.addListDataListener(listDataReport2);
sil.addValueChangeListener(changeReport);
arrayListModel.add("One");
assertEquals("No list change.", changeReport.eventCount(), 0);
assertEquals("An element has been added.", listDataReport2.eventCount(), 1);
assertEquals("An element has been added.", listDataReport2.eventCountAdd(), 1);
arrayListModel.addAll(Arrays.asList(new String[] {"two", "three", "four"}));
assertEquals("No list change.", changeReport.eventCount(), 0);
assertEquals("An element block has been added.", listDataReport2.eventCount(), 2);
assertEquals("An element block has been added.", listDataReport2.eventCountAdd(), 2);
arrayListModel.remove(0);
assertEquals("An element has been removed.", listDataReport2.eventCount(), 3);
assertEquals("No element has been added.", listDataReport2.eventCountAdd(), 2);
assertEquals("An element has been removed.", listDataReport2.eventCountRemove(), 1);
arrayListModel.set(1, "newTwo");
assertEquals("An element has been replaced.", listDataReport2.eventCount(), 4);
assertEquals("No element has been added.", listDataReport2.eventCountAdd(), 2);
assertEquals("No element has been removed.", listDataReport2.eventCountRemove(), 1);
assertEquals("An element has been changed.", listDataReport2.eventCountChange(), 1);
// Compare the event counts of the list models listener
// with the SelectionInList listener.
assertEquals(
"Add event counts are equal.",
listDataReport1.eventCountAdd(),
listDataReport2.eventCountAdd());
assertEquals(
"Remove event counts are equal.",
listDataReport1.eventCountRemove(),
listDataReport2.eventCountRemove());
assertEquals(
"Change event counts are equal.",
listDataReport1.eventCountChange(),
listDataReport2.eventCountChange());
}
public void testIndexChangeFiresChangesWithNonNullOldValue() {
int initialSelectionIndex = 0;
int newSelectionIndex = 1;
AbstractValueModel indexHolder = new ValueHolderWithOldValueNull(initialSelectionIndex);
SelectionInList<String> sil = new SelectionInList<String>(listModel);
sil.setSelectionIndexHolder(indexHolder);
// Create change reports.
PropertyChangeReport valueReport = new PropertyChangeReport();
PropertyChangeReport selectionReport = new PropertyChangeReport();
PropertyChangeReport selectionIndexReport = new PropertyChangeReport();
// Register change reports for value, selection, selection index,
// and selectionEmpty
sil.addValueChangeListener(valueReport);
sil.addPropertyChangeListener(SelectionInList.PROPERTYNAME_SELECTION, selectionReport);
sil.addPropertyChangeListener(
SelectionInList.PROPERTYNAME_SELECTION_INDEX, selectionIndexReport);
// We change the selection index holder's value to the new index.
// The ValueModel used for the selectionIndexHolder fires no old value.
indexHolder.setValue(newSelectionIndex);
Object oldValue = valueReport.lastOldValue();
Object oldSelection = selectionReport.lastOldValue();
Object oldSelectionIndex = selectionIndexReport.lastOldValue();
assertTrue("Non-null old value in value change event", oldValue != null);
assertTrue("Non-null old value in selection change event", oldSelection != null);
assertTrue("Non-null old value in selectionIndex change event", oldSelectionIndex != null);
}
public void testSelectionReflectsIndexAfterIndexMoveForward() {
ValueModel selectionHolder = new ValueHolder();
SelectionInList<String> sil =
new SelectionInList<String>(new ValueHolder(listModel, true), selectionHolder);
sil.setSelectionIndex(1);
PropertyChangeReport changeReport = new PropertyChangeReport();
sil.addPropertyChangeListener(SelectionInList.PROPERTYNAME_SELECTION, changeReport);
Object initialSelection = listModel.get(1);
assertEquals(
"SelectionHolder holds the second list element.",
initialSelection,
selectionHolder.getValue());
listModel.add(0, "zero");
Object expectedSelection = listModel.get(2);
assertEquals("The selection index has been increased by 1.", 2, sil.getSelectionIndex());
assertEquals("The selection remains unchanged.", expectedSelection, sil.getSelection());
assertEquals(
"The selection holder value remains unchanged.",
expectedSelection,
sil.getSelectionHolder().getValue());
assertEquals("No selection change event has been fired.", 0, changeReport.eventCount());
}