suite.addTestSuite(CompareUIPluginTest.class);

/*******************************************************************************

 * Copyright (c) 2011 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

 *******************************************************************************/

package org.eclipse.compare.tests;

import java.io.ByteArrayInputStream;

import java.io.InputStream;

import junit.framework.TestCase;

import org.eclipse.compare.CompareConfiguration;

import org.eclipse.compare.IStreamContentAccessor;

import org.eclipse.compare.ITypedElement;

import org.eclipse.compare.internal.CompareUIPlugin;

import org.eclipse.compare.internal.ViewerDescriptor;

import org.eclipse.compare.structuremergeviewer.DiffNode;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.swt.graphics.Image;

public class CompareUIPluginTest extends TestCase {

	private static class UnknownTypedElement implements ITypedElement {

		public Image getImage() {

			return null;

		}

		public String getName() {

			return "test";

		}

		public String getType() {

			return UNKNOWN_TYPE;

		}

	}

	private static class TextTypedElement implements ITypedElement {

		public Image getImage() {

			return null;

		}

		public String getName() {

			return "test";

		}

		public String getType() {

			return TEXT_TYPE;

		}

	}

	private static class TextTypedElementStreamAccessor implements ITypedElement, IStreamContentAccessor {

		public Image getImage() {

			return null;

		}

		public String getName() {

			return "test";

		}

		public String getType() {

			return TEXT_TYPE;

		}

		public InputStream getContents() throws CoreException {

			/*

			 * Whatever we return has no importance as long as it is not "null", this is only to make

			 * CompareUIPlugin#guessType happy. However, it is only happy if what we return resembles a text.

			 */

			return new ByteArrayInputStream(new byte[] {' '});

		}

	}

	public void testFindContentViewerDescriptor_UnknownType() {

		CompareConfiguration cc = new CompareConfiguration();

		DiffNode in = new DiffNode(new UnknownTypedElement(), new UnknownTypedElement());

		ViewerDescriptor[] result = CompareUIPlugin.getDefault().findContentViewerDescriptor(null, in, cc);

		// API Compatibility : "no descriptor found" should return a null array instead of a 0-lengthed one.

		assertNull(result);

	}

	public void testFindContentViewerDescriptor_TextType_NotStreamAccessor() {

		CompareConfiguration cc = new CompareConfiguration();

		DiffNode in = new DiffNode(new TextTypedElement(), new TextTypedElement());

		ViewerDescriptor[] result = CompareUIPlugin.getDefault().findContentViewerDescriptor(null, in, cc);

		/*

		 * "TextTypedElement" is "text" typed : it thus has a Content Viewer attached. However, this content

		 * viewer is currently NOT returned because of bug 293926

		 */

		assertNotNull(result);

		assertEquals(1, result.length);

	}

	public void testFindContentViewerDescriptorForTextType_StreamAccessor() {

		CompareConfiguration cc = new CompareConfiguration();

		DiffNode in = new DiffNode(new TextTypedElementStreamAccessor(), new TextTypedElementStreamAccessor());

		ViewerDescriptor[] result = CompareUIPlugin.getDefault().findContentViewerDescriptor(null, in, cc);

		/*

		 * "TextTypedElement" is "text" typed : it thus has a Content Viewer attached. However, the content

		 * viewer will only be returned because we made our "ITypedElement" be an IStreamContentAccessor.

		 */

		assertNotNull(result);

		assertEquals(1, result.length);

	}

}