| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.user.client.ui; |
| |
| import com.google.gwt.event.logical.shared.ValueChangeEvent; |
| import com.google.gwt.event.logical.shared.ValueChangeHandler; |
| |
| import junit.framework.Assert; |
| |
| import java.util.Date; |
| import java.util.LinkedList; |
| |
| |
| /** |
| * Handy tool for testing classes that implement {@link HasValue} of |
| * {@link Date}. |
| */ |
| public class DateValueChangeTester extends Assert { |
| static class Handler implements ValueChangeHandler<Date> { |
| private LinkedList<Date> received = new LinkedList<Date>(); |
| |
| @Override |
| public void onValueChange(ValueChangeEvent<Date> event) { |
| received.addLast(event.getValue()); |
| } |
| |
| private void assertSingleEvent(Date date) { |
| Date receivedEvent = received.removeFirst(); |
| assertEquals(date, receivedEvent); |
| assertNotSame(date, receivedEvent); |
| assertNoEvents(); |
| } |
| |
| private void assertNoEvents() { |
| assertTrue(received.isEmpty()); |
| } |
| } |
| |
| private final HasValue<Date> subject; |
| |
| /** |
| * The HasValue<Date> to be tested. It should have been freshly created before |
| * handing it to this tester. |
| */ |
| public DateValueChangeTester(HasValue<Date> subject) { |
| this.subject = subject; |
| } |
| |
| /** |
| * Asserts that the default value is null, checks that value change events do |
| * and don't fire when appropriate, and that getValue() always returns what |
| * was handed to getValue(). |
| */ |
| @SuppressWarnings("deprecation") |
| public void run() { |
| |
| // Negative test cases. |
| assertNull(subject.getValue()); |
| |
| DateValueChangeTester.Handler h = new Handler(); |
| subject.addValueChangeHandler(h); |
| |
| subject.setValue(null); |
| assertNull(subject.getValue()); |
| h.assertNoEvents(); |
| |
| Date able = new Date(1999, 5, 15); |
| subject.setValue(able); |
| assertEquals(able, subject.getValue()); |
| h.assertNoEvents(); |
| |
| subject.setValue(able); |
| h.assertNoEvents(); |
| |
| Date baker = new Date(1965, 12, 7); |
| subject.setValue(baker); |
| h.assertNoEvents(); |
| |
| // Positive test cases. |
| |
| // Value has not changed, so should not fire a change event even though |
| // fire event is true. |
| fire(baker); |
| h.assertNoEvents(); |
| fire(able); |
| h.assertSingleEvent(able); |
| |
| fire(baker); |
| h.assertSingleEvent(baker); |
| |
| // Value has changed, but boolean is false. |
| subject.setValue(baker, false); |
| h.assertNoEvents(); |
| |
| Date highResolutionDate = new Date(); // Date 'now' includes milliseconds |
| fire(highResolutionDate); |
| normalizeTime(highResolutionDate); |
| h.assertSingleEvent(highResolutionDate); |
| } |
| |
| protected void normalizeTime(Date highResolutionDate) { |
| // no-op by default but may be overridden to decrease precision of the time w.r.t format |
| } |
| |
| protected void fire(Date d) { |
| subject.setValue(d, true); |
| } |
| } |