VirtualLazyTreeViewerTest.java

/*******************************************************************************
 * Copyright (c) 2005, 2017 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Tom Schindl - bug 151205
 *******************************************************************************/
package org.eclipse.jface.tests.viewers;

import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Tree;

public class VirtualLazyTreeViewerTest extends TreeViewerTest {

	protected int setDataCalls = 0;

	public VirtualLazyTreeViewerTest(String name) {
		super(name);
	}

    @Override
	protected StructuredViewer createViewer(Composite parent) {
    	Tree tree = new Tree(parent, SWT.VIRTUAL);
		tree.addListener(SWT.SetData, event -> setDataCalls++);
        fTreeViewer = new TreeViewer(tree);
        fTreeViewer.setContentProvider(new TestModelLazyTreeContentProvider((TreeViewer) fTreeViewer));
        return fTreeViewer;
    }

    @Override
	public void setUp() {
    	super.setUp();
    	// process events because the content provider uses an asyncExec to set the item count of the tree
    	processEvents();
    }

    @Override
	protected void setInput() {
		super.setInput();
	}

    @Override
	public void tearDown() {
    	super.tearDown();
//    	System.out.println("calls: " + setDataCalls);
    }

    public void testLeafIsExpandable() {
    	TestElement leafElement = fRootElement.getChildAt(2).getChildAt(3).getChildAt(2);
    	assertEquals(0, leafElement.getChildCount());
		assertFalse(fTreeViewer.isExpandable(leafElement));
    }

    public void testRootIsExpandable() {
    	TestElement rootElement = fRootElement.getChildAt(2);
    	assertTrue(rootElement.getChildCount() > 0);
    	assertTrue(fTreeViewer.isExpandable(rootElement));
    }

    public void testNodeIsExpandable() {
    	TestElement nodeElement = fRootElement.getChildAt(2).getChildAt(3);
    	assertTrue(nodeElement.getChildCount() > 0);
    	assertTrue(fTreeViewer.isExpandable(nodeElement));
    }


    @Override
	public void testRefreshWithDuplicateChild() {
    	// Test leads to infinite loop. Duplicate children are a bad idea in virtual trees.
    }

    @Override
	public void testSetExpandedWithCycle() {
    	// Test leads to infinite loop. Cycles are a bad idea in virtual trees.
    }

    @Override
	public void testFilterExpanded() {
    	// no need to test since virtual trees do not support filtering
    }

    @Override
	public void testFilter() {
    	// no need to test since virtual trees do not support filtering
    }

    @Override
	public void testSetFilters() {
    	// no need to test since virtual trees do not support filtering
    }

    @Override
	public void testInsertSiblingWithFilterFiltered() {
    	// no need to test since virtual trees do not support filtering
    }

    @Override
	public void testInsertSiblingWithFilterNotFiltered() {
    	// no need to test since virtual trees do not support filtering
    }

    @Override
	public void testInsertSiblingWithSorter() {
    	// no need to test since virtual trees do not support sorting
    }

    @Override
	public void testRenameWithFilter() {
    	// no need to test since virtual trees do not support filtering
    }

    @Override
	public void testRenameWithSorter() {
    	// no need to test since virtual trees do not support sorting
    }

    @Override
	public void testSorter() {
    	// no need to test since virtual trees do not support sorting
    }

    // Temporary overrides for bug 347491:
    @Override
	public void testRefreshWithAddedChildren() {
		if (disableTestsBug347491) {
			return;
		}
		if (setDataCalls == 0) {
			System.err.println("SWT.SetData is not received. Cancelled test " + getName());
			return;
		}
		super.testRefreshWithAddedChildren();
    }

    @Override
	public void testDeleteSibling() {
		if (disableTestsBug347491) {
			return;
		}
		if (setDataCalls == 0) {
			System.err.println("SWT.SetData is not received. Cancelled test " + getName());
			return;
		}
		super.testDeleteSibling();
    }

    @Override
	public void testExpandToLevel() {
		if (setDataCalls == 0) {
			System.err.println("SWT.SetData is not received. Cancelled test " + getName());
			return;
		}
    	super.testExpandToLevel();
    }

    @Override
	public void testInsertSibling() {
		if (disableTestsBug347491) {
			return;
		}
		if (disableTestsBug493357) {
			System.out.println(getName() + " disabled due to Bug 493357");
			return;
		}
		if (setDataCalls == 0) {
			System.err.println("SWT.SetData is not received. Cancelled test " + getName());
			return;
		}
    	super.testInsertSibling();
    }

    @Override
	public void testInsertSiblings() {
		if (disableTestsBug347491) {
			return;
		}
		if (disableTestsBug493357) {
			System.out.println(getName() + " disabled due to Bug 493357");
			return;
		}
		if (setDataCalls == 0) {
			System.err.println("SWT.SetData is not received. Cancelled test " + getName());
			return;
		}
   	super.testInsertSiblings();
    }

    @Override
	public void testSetInput() {
		if (disableTestsBug347491) {
			return;
		}
		if (setDataCalls == 0) {
			System.err.println("SWT.SetData is not received. Cancelled test " + getName());
			return;
		}
    	super.testSetInput();
    }

    @Override
	public void testSomeChildrenChanged() {
		if (disableTestsBug347491) {
			return;
		}
		if (disableTestsBug493357) {
			System.out.println(getName() + " disabled due to Bug 493357");
			return;
		}
		if (setDataCalls == 0) {
			System.err.println("SWT.SetData is not received. Cancelled test " + getName());
			return;
		}
    	super.testSomeChildrenChanged();
    }

	@Override
	public void testWorldChanged() {
		if (disableTestsBug347491) {
			return;
		}
		if (disableTestsBug493357) {
			System.out.println(getName() + " disabled due to Bug 493357");
			return;
		}
		if (setDataCalls == 0) {
			System.err.println("SWT.SetData is not received. Cancelled test " + getName());
			return;
		}
		super.testWorldChanged();
	}
}