TreeViewerColumnValueSorterTest.java

/*
 * Copyright 2010 The Rabbit Eclipse Plug-in Project
 * 
 * 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 rabbit.ui.internal.viewers;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.junit.Assert.assertThat;
import static org.mockito.BDDMockito.given;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.mock;

import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TreePath;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeColumn;
import org.junit.Test;

/**
 * @see TreeViewerColumnValueSorter
 */
public final class TreeViewerColumnValueSorterTest
    extends TreeViewerColumnSorterTest {

  /**
   * Test when a column is clicked, the items in the viewer are sorted.
   */
  @Test
  public void shouldSortItemsAccordingToTheirValueWhenTheColumnIsSelected() {
    Long bigger = Long.valueOf(100);
    Long smaller = Long.valueOf(1);

    ITreeContentProvider contentProvider = mock(ITreeContentProvider.class);
    given(contentProvider.getElements(any()))
        .willReturn(new Object[]{bigger, smaller});

    IValueProvider valueProvider = mock(IValueProvider.class);
    given(valueProvider.getValue(new TreePath(new Object[]{bigger})))
        .willReturn(bigger);
    given(valueProvider.getValue(new TreePath(new Object[]{smaller})))
        .willReturn(smaller);

    TreeViewer viewer = new TreeViewer(shell);
    viewer.setContentProvider(contentProvider);
    viewer.setLabelProvider(new LabelProvider());

    TreeViewerColumnValueSorter sorter = create(viewer, valueProvider);
    assertThat(sorter.getSelectedColumn(), nullValue());

    Tree tree = sorter.getViewer().getTree();
    TreeColumn column = new TreeColumn(tree, SWT.NONE);

    viewer.setInput("");

    Event event = new Event();
    event.widget = column;
    SelectionEvent selectionEvent = new SelectionEvent(event);

    sorter.widgetSelected(selectionEvent);
    assertThat(tree.getSortColumn(), is(column));
    assertThat(tree.getSortDirection(), is(SWT.UP));
    assertThat(tree.getItem(0).getData(), is((Object) smaller));
    assertThat(tree.getItem(1).getData(), is((Object) bigger));

    sorter.widgetSelected(selectionEvent);
    assertThat(tree.getSortColumn(), is(column));
    assertThat(tree.getSortDirection(), is(SWT.DOWN));
    assertThat(tree.getItem(0).getData(), is((Object) bigger));
    assertThat(tree.getItem(1).getData(), is((Object) smaller));
  }

  @Override
  protected TreeViewerColumnValueSorter create(TreeViewer viewer) {
    return new TreeViewerColumnValueSorter(viewer, mock(IValueProvider.class));
  }

  protected TreeViewerColumnValueSorter create(
      TreeViewer viewer, IValueProvider provider) {
    return new TreeViewerColumnValueSorter(viewer, provider);
  }
}