tests/org.eclipse.core.tests.runtime/src/org/eclipse/core/tests/runtime/perf/ContentTypePerformanceTest.java - gerrit/platform/eclipse.platform.runtime - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005, 2012 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.core.tests.runtime.perf;

 import java.io.*;
 import java.net.MalformedURLException;
 import java.net.URL;
 import junit.framework.Test;
 import junit.framework.TestSuite;
 import org.eclipse.core.internal.content.*;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.content.*;
 import org.eclipse.core.runtime.preferences.InstanceScope;
 import org.eclipse.core.tests.harness.*;
 import org.eclipse.core.tests.runtime.RuntimeTest;
 import org.eclipse.core.tests.runtime.RuntimeTestsPlugin;
 import org.eclipse.core.tests.session.PerformanceSessionTestSuite;
 import org.eclipse.core.tests.session.SessionTestSuite;
 import org.osgi.framework.Bundle;
 import org.osgi.framework.BundleException;

 public class ContentTypePerformanceTest extends RuntimeTest {

 	private final static String CONTENT_TYPE_PREF_NODE = Platform.PI_RUNTIME + IPath.SEPARATOR + "content-types"; //$NON-NLS-1$
 	private static final String DEFAULT_NAME = "file_" + ContentTypePerformanceTest.class.getName();
 	private static final int ELEMENTS_PER_LEVEL = 4;
 	private static final int NUMBER_OF_LEVELS = 4;
 	private static final String TEST_DATA_ID = "org.eclipse.core.tests.runtime.contenttype.perf.testdata";
 	private static final int TOTAL_NUMBER_OF_ELEMENTS = computeTotalTypes(NUMBER_OF_LEVELS, ELEMENTS_PER_LEVEL);

 	private static int computeTotalTypes(int levels, int elementsPerLevel) {
 		double sum = 0;
 		for (int i = 0; i <= levels; i++)
 			sum += Math.pow(elementsPerLevel, i);
 		return (int) sum;
 	}

 	private static String createContentType(Writer writer, int number, String baseTypeId) throws IOException {
 		String id = "performance" + number;
 		String definition = generateContentType(number, id, baseTypeId, new String[] {DEFAULT_NAME}, null);
 		writer.write(definition);
 		writer.write(System.getProperty("line.separator"));
 		return id;
 	}

 	public static int createContentTypes(Writer writer, String baseTypeId, int created, int numberOfLevels, int nodesPerLevel) throws IOException {
 		if (numberOfLevels == 0)
 			return 0;
 		int local = nodesPerLevel;
 		for (int i = 0; i < nodesPerLevel; i++) {
 			String id = createContentType(writer, created + i, baseTypeId);
 			local += createContentTypes(writer, id, created + local, numberOfLevels - 1, nodesPerLevel);
 		}
 		return local;
 	}

 	private static String generateContentType(int number, String id, String baseTypeId, String[] fileNames, String[] fileExtensions) {
 		StringBuffer result = new StringBuffer();
 		result.append("<content-type id=\"");
 		result.append(id);
 		result.append("\" name=\"");
 		result.append(id);
 		result.append("\" ");
 		if (baseTypeId != null) {
 			result.append("base-type=\"");
 			result.append(baseTypeId);
 			result.append("\" ");
 		}
 		String fileNameList = Util.toListString(fileNames);
 		if (fileNameList != null) {
 			result.append("file-names=\"");
 			result.append(fileNameList);
 			result.append("\" ");
 		}
 		String fileExtensionsList = Util.toListString(fileExtensions);
 		if (fileExtensions != null && fileExtensions.length > 0) {
 			result.append("file-extensions=\"");
 			result.append(fileExtensionsList);
 			result.append("\" ");
 		}
 		result.append("describer=\"");
 		result.append(BinarySignatureDescriber.class.getName());
 		result.append(":");
 		result.append(getSignatureString(number));
 		result.append("\"/>");
 		return result.toString();
 	}

 	private static String getContentTypeId(int i) {
 		return TEST_DATA_ID + ".performance" + i;
 	}

 	private static byte[] getSignature(int number) {
 		byte[] result = new byte[4];
 		for (int i = 0; i < result.length; i++)
 			result[i] = (byte) ((number >> (i * 8)) & 0xFFL);
 		return result;
 	}

 	private static String getSignatureString(int number) {
 		byte[] signature = getSignature(number);
 		StringBuffer result = new StringBuffer(signature.length * 3 - 1);
 		for (int i = 0; i < signature.length; i++) {
 			result.append(Integer.toHexString(0xFF & signature[i]));
 			result.append(' ');
 		}
 		result.deleteCharAt(result.length() - 1);
 		return result.toString();
 	}

 	public static Test suite() {
 		TestSuite suite = new TestSuite(ContentTypePerformanceTest.class.getName());

 		//		suite.addTest(new ContentTypePerformanceTest("testDoSetUp"));
 		//		suite.addTest(new ContentTypePerformanceTest("testContentMatching"));
 		//		suite.addTest(new ContentTypePerformanceTest("testContentTXTMatching"));
 		//		suite.addTest(new ContentTypePerformanceTest("testContentXMLMatching"));
 		//		suite.addTest(new ContentTypePerformanceTest("testDoTearDown"));

 		SessionTestSuite setUp = new SessionTestSuite(PI_RUNTIME_TESTS, "testDoSetUp");
 		setUp.addTest(new ContentTypePerformanceTest("testDoSetUp"));
 		suite.addTest(setUp);

 		TestSuite singleRun = new PerformanceSessionTestSuite(PI_RUNTIME_TESTS, 1, "singleSessionTests");
 		singleRun.addTest(new ContentTypePerformanceTest("testContentMatching"));
 		singleRun.addTest(new ContentTypePerformanceTest("testNameMatching"));
 		singleRun.addTest(new ContentTypePerformanceTest("testIsKindOf"));
 		suite.addTest(singleRun);

 		TestSuite loadCatalog = new PerformanceSessionTestSuite(PI_RUNTIME_TESTS, 10, "multipleSessionTests");
 		loadCatalog.addTest(new ContentTypePerformanceTest("testLoadCatalog"));
 		suite.addTest(loadCatalog);

 		TestSuite tearDown = new SessionTestSuite(PI_RUNTIME_TESTS, "testDoTearDown");
 		tearDown.addTest(new ContentTypePerformanceTest("testDoTearDown"));
 		suite.addTest(tearDown);
 		return suite;
 	}

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

 	private int countTestContentTypes(IContentType[] all) {
 		String namespace = TEST_DATA_ID + '.';
 		int count = 0;
 		for (int i = 0; i < all.length; i++)
 			if (all[i].getId().startsWith(namespace))
 				count++;
 		return count;
 	}

 	public IPath getExtraPluginLocation() {
 		return getTempDir().append(TEST_DATA_ID);
 	}

 	private Bundle installContentTypes(String tag, int numberOfLevels, int nodesPerLevel) {
 		TestRegistryChangeListener listener = new TestRegistryChangeListener(Platform.PI_RUNTIME, ContentTypeBuilder.PT_CONTENTTYPES, null, null);
 		Bundle installed = null;
 		listener.register();
 		try {
 			IPath pluginLocation = getExtraPluginLocation();
 			pluginLocation.toFile().mkdirs();
 			URL installURL = null;
 			try {
 				installURL = pluginLocation.toFile().toURL();
 			} catch (MalformedURLException e) {
 				fail(tag + ".0.5", e);
 			}
 			Writer writer = null;
 			try {
 				writer = new BufferedWriter(new FileWriter(pluginLocation.append("plugin.xml").toFile()), 0x10000);
 				writer.write("<plugin id=\"" + TEST_DATA_ID + "\" name=\"Content Type Performance Test Data\" version=\"1\">");
 				writer.write(System.getProperty("line.separator"));
 				writer.write("<requires><import plugin=\"" + PI_RUNTIME_TESTS + "\"/></requires>");
 				writer.write(System.getProperty("line.separator"));
 				writer.write("<extension point=\"org.eclipse.core.runtime.contentTypes\">");
 				writer.write(System.getProperty("line.separator"));
 				String root = createContentType(writer, 0, null);
 				createContentTypes(writer, root, 1, numberOfLevels, nodesPerLevel);
 				writer.write("</extension></plugin>");
 			} catch (IOException e) {
 				fail(tag + ".1.0", e);
 			} finally {
 				if (writer != null)
 					try {
 						writer.close();
 					} catch (IOException e) {
 						fail("1.1", e);
 					}
 			}
 			try {
 				installed = RuntimeTestsPlugin.getContext().installBundle(installURL.toExternalForm());
 			} catch (BundleException e) {
 				fail(tag + ".3.0", e);
 			}
 			BundleTestingHelper.refreshPackages(RuntimeTestsPlugin.getContext(), new Bundle[] {installed});
 			assertTrue(tag + ".4.0", listener.eventReceived(10000));
 		} finally {
 			listener.unregister();
 		}
 		return installed;
 	}

 	/**
 	 * Warms up the content type registry.
 	 */
 	private void loadChildren() {
 		final IContentTypeManager manager = Platform.getContentTypeManager();
 		IContentType[] allTypes = manager.getAllContentTypes();
 		for (int i = 0; i < allTypes.length; i++) {
 			String[] fileNames = allTypes[i].getFileSpecs(IContentType.IGNORE_USER_DEFINED | IContentType.FILE_NAME_SPEC);
 			for (int j = 0; j < fileNames.length; j++)
 				manager.findContentTypeFor(fileNames[j]);
 			String[] fileExtensions = allTypes[i].getFileSpecs(IContentType.IGNORE_USER_DEFINED | IContentType.FILE_EXTENSION_SPEC);
 			for (int j = 0; j < fileExtensions.length; j++)
 				manager.findContentTypeFor("anyname." + fileExtensions[j]);
 		}
 	}

 	/**
 	 * Returns a loaded content type manager. Except for load time tests, this method should
 	 * be called outside the scope of performance monitoring.
 	 */
 	private IContentTypeManager loadContentTypeManager() {
 		// any cheap interaction that causes the catalog to be built
 		Platform.getContentTypeManager().getContentType(IContentTypeManager.CT_TEXT);
 		return Platform.getContentTypeManager();
 	}

 	/** Forces all describers to be loaded.*/
 	private void loadDescribers() {
 		final IContentTypeManager manager = Platform.getContentTypeManager();
 		IContentType[] allTypes = manager.getAllContentTypes();
 		for (int i = 0; i < allTypes.length; i++)
 			((ContentTypeHandler) allTypes[i]).getTarget().getDescriber();
 	}

 	private void loadPreferences() {
 		new InstanceScope().getNode(CONTENT_TYPE_PREF_NODE);
 	}

 	/** Tests how much the size of the catalog affects the performance of content type matching by content analysis */
 	public void testContentMatching() {
 		loadPreferences();
 		// warm up content type registry
 		final IContentTypeManager manager = loadContentTypeManager();
 		loadDescribers();
 		loadChildren();
 		new PerformanceTestRunner() {
 			protected void test() {
 				try {
 					for (int i = 0; i < TOTAL_NUMBER_OF_ELEMENTS; i++) {
 						String id = getContentTypeId(i);
 						IContentType[] result = manager.findContentTypesFor(new ByteArrayInputStream(getSignature(i)), DEFAULT_NAME);
 						assertEquals("1.0." + i, 1, result.length);
 						assertEquals("1.1." + i, id, result[0].getId());
 					}
 				} catch (IOException e) {
 					fail("2.0", e);
 				}
 			}
 		}.run(this, 10, 2);
 	}

 	/* (non-Javadoc)
 	 * @see junit.framework.TestCase#setUp()
 	 */
 	protected void setUp() throws Exception {
 		super.setUp();
 		if (getName().equals("testDoSetUp") || getName().equals("testDoTearDown"))
 			return;
 		Bundle installed = null;
 		try {
 			installed = RuntimeTestsPlugin.getContext().installBundle(getExtraPluginLocation().toFile().toURL().toExternalForm());
 		} catch (BundleException e) {
 			fail("1.0", e);
 		} catch (MalformedURLException e) {
 			fail("2.0", e);
 		}
 		BundleTestingHelper.refreshPackages(RuntimeTestsPlugin.getContext(), new Bundle[] {installed});
 	}

 	public void testDoSetUp() {
 		installContentTypes("1.0", NUMBER_OF_LEVELS, ELEMENTS_PER_LEVEL);
 	}

 	public void testDoTearDown() {
 		ensureDoesNotExistInFileSystem(getExtraPluginLocation().toFile());
 	}

 	public void testIsKindOf() {
 		// warm up preference service
 		loadPreferences();
 		// warm up content type registry
 		final IContentTypeManager manager = loadContentTypeManager();
 		loadChildren();
 		final IContentType root = manager.getContentType(getContentTypeId(0));
 		assertNotNull("2.0", root);
 		new PerformanceTestRunner() {
 			protected void test() {
 				for (int i = 0; i < TOTAL_NUMBER_OF_ELEMENTS; i++) {
 					IContentType type = manager.getContentType(getContentTypeId(i));
 					assertNotNull("3.0." + i, type);
 					assertTrue("3.1." + i, type.isKindOf(root));
 				}
 			}
 		}.run(this, 10, 500);
 	}

 	/**
 	 * This test is intended for running as a session test.
 	 */
 	public void testLoadCatalog() {
 		// warm up preference service
 		loadPreferences();
 		PerformanceTestRunner runner = new PerformanceTestRunner() {
 			protected void test() {
 				// any interation that will cause the registry to be loaded
 				Platform.getContentTypeManager().getContentType(IContentTypeManager.CT_TEXT);
 			}
 		};
 		runner.run(this, 1, /* must run only once - the suite controls how many sessions are run */1);
 		// sanity check to make sure we are running with good data
 		assertEquals("missing content types", TOTAL_NUMBER_OF_ELEMENTS, countTestContentTypes(Platform.getContentTypeManager().getAllContentTypes()));
 	}

 	/** Tests how much the size of the catalog affects the performance of content type matching by name */
 	public void testNameMatching() {
 		// warm up preference service
 		loadPreferences();
 		// warm up content type registry
 		final IContentTypeManager manager = loadContentTypeManager();
 		loadDescribers();
 		loadChildren();
 		new PerformanceTestRunner() {
 			protected void test() {
 				IContentType[] associated = manager.findContentTypesFor("foo.txt");
 				// we know at least the etxt content type should be here
 				assertTrue("2.0", associated.length >= 1);
 				// and it is supposed to be the first one (since it is at the root)
 				assertEquals("2.1", IContentTypeManager.CT_TEXT, associated[0].getId());
 			}
 		}.run(this, 10, 200000);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005, 2012 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.core.tests.runtime.perf;

	import java.io.*;
	import java.net.MalformedURLException;
	import java.net.URL;
	import junit.framework.Test;
	import junit.framework.TestSuite;
	import org.eclipse.core.internal.content.*;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.core.runtime.content.*;
	import org.eclipse.core.runtime.preferences.InstanceScope;
	import org.eclipse.core.tests.harness.*;
	import org.eclipse.core.tests.runtime.RuntimeTest;
	import org.eclipse.core.tests.runtime.RuntimeTestsPlugin;
	import org.eclipse.core.tests.session.PerformanceSessionTestSuite;
	import org.eclipse.core.tests.session.SessionTestSuite;
	import org.osgi.framework.Bundle;
	import org.osgi.framework.BundleException;

	public class ContentTypePerformanceTest extends RuntimeTest {

	private final static String CONTENT_TYPE_PREF_NODE = Platform.PI_RUNTIME + IPath.SEPARATOR + "content-types"; //$NON-NLS-1$
	private static final String DEFAULT_NAME = "file_" + ContentTypePerformanceTest.class.getName();
	private static final int ELEMENTS_PER_LEVEL = 4;
	private static final int NUMBER_OF_LEVELS = 4;
	private static final String TEST_DATA_ID = "org.eclipse.core.tests.runtime.contenttype.perf.testdata";
	private static final int TOTAL_NUMBER_OF_ELEMENTS = computeTotalTypes(NUMBER_OF_LEVELS, ELEMENTS_PER_LEVEL);

	private static int computeTotalTypes(int levels, int elementsPerLevel) {
	double sum = 0;
	for (int i = 0; i <= levels; i++)
	sum += Math.pow(elementsPerLevel, i);
	return (int) sum;
	}

	private static String createContentType(Writer writer, int number, String baseTypeId) throws IOException {
	String id = "performance" + number;
	String definition = generateContentType(number, id, baseTypeId, new String[] {DEFAULT_NAME}, null);
	writer.write(definition);
	writer.write(System.getProperty("line.separator"));
	return id;
	}

	public static int createContentTypes(Writer writer, String baseTypeId, int created, int numberOfLevels, int nodesPerLevel) throws IOException {
	if (numberOfLevels == 0)
	return 0;
	int local = nodesPerLevel;
	for (int i = 0; i < nodesPerLevel; i++) {
	String id = createContentType(writer, created + i, baseTypeId);
	local += createContentTypes(writer, id, created + local, numberOfLevels - 1, nodesPerLevel);
	}
	return local;
	}

	private static String generateContentType(int number, String id, String baseTypeId, String[] fileNames, String[] fileExtensions) {
	StringBuffer result = new StringBuffer();
	result.append("<content-type id=\"");
	result.append(id);
	result.append("\" name=\"");
	result.append(id);
	result.append("\" ");
	if (baseTypeId != null) {
	result.append("base-type=\"");
	result.append(baseTypeId);
	result.append("\" ");
	}
	String fileNameList = Util.toListString(fileNames);
	if (fileNameList != null) {
	result.append("file-names=\"");
	result.append(fileNameList);
	result.append("\" ");
	}
	String fileExtensionsList = Util.toListString(fileExtensions);
	if (fileExtensions != null && fileExtensions.length > 0) {
	result.append("file-extensions=\"");
	result.append(fileExtensionsList);
	result.append("\" ");
	}
	result.append("describer=\"");
	result.append(BinarySignatureDescriber.class.getName());
	result.append(":");
	result.append(getSignatureString(number));
	result.append("\"/>");
	return result.toString();
	}

	private static String getContentTypeId(int i) {
	return TEST_DATA_ID + ".performance" + i;
	}

	private static byte[] getSignature(int number) {
	byte[] result = new byte[4];
	for (int i = 0; i < result.length; i++)
	result[i] = (byte) ((number >> (i * 8)) & 0xFFL);
	return result;
	}

	private static String getSignatureString(int number) {
	byte[] signature = getSignature(number);
	StringBuffer result = new StringBuffer(signature.length * 3 - 1);
	for (int i = 0; i < signature.length; i++) {
	result.append(Integer.toHexString(0xFF & signature[i]));
	result.append(' ');
	}
	result.deleteCharAt(result.length() - 1);
	return result.toString();
	}

	public static Test suite() {
	TestSuite suite = new TestSuite(ContentTypePerformanceTest.class.getName());

	// suite.addTest(new ContentTypePerformanceTest("testDoSetUp"));
	// suite.addTest(new ContentTypePerformanceTest("testContentMatching"));
	// suite.addTest(new ContentTypePerformanceTest("testContentTXTMatching"));
	// suite.addTest(new ContentTypePerformanceTest("testContentXMLMatching"));
	// suite.addTest(new ContentTypePerformanceTest("testDoTearDown"));

	SessionTestSuite setUp = new SessionTestSuite(PI_RUNTIME_TESTS, "testDoSetUp");
	setUp.addTest(new ContentTypePerformanceTest("testDoSetUp"));
	suite.addTest(setUp);

	TestSuite singleRun = new PerformanceSessionTestSuite(PI_RUNTIME_TESTS, 1, "singleSessionTests");
	singleRun.addTest(new ContentTypePerformanceTest("testContentMatching"));
	singleRun.addTest(new ContentTypePerformanceTest("testNameMatching"));
	singleRun.addTest(new ContentTypePerformanceTest("testIsKindOf"));
	suite.addTest(singleRun);

	TestSuite loadCatalog = new PerformanceSessionTestSuite(PI_RUNTIME_TESTS, 10, "multipleSessionTests");
	loadCatalog.addTest(new ContentTypePerformanceTest("testLoadCatalog"));
	suite.addTest(loadCatalog);

	TestSuite tearDown = new SessionTestSuite(PI_RUNTIME_TESTS, "testDoTearDown");
	tearDown.addTest(new ContentTypePerformanceTest("testDoTearDown"));
	suite.addTest(tearDown);
	return suite;
	}

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

	private int countTestContentTypes(IContentType[] all) {
	String namespace = TEST_DATA_ID + '.';
	int count = 0;
	for (int i = 0; i < all.length; i++)
	if (all[i].getId().startsWith(namespace))
	count++;
	return count;
	}

	public IPath getExtraPluginLocation() {
	return getTempDir().append(TEST_DATA_ID);
	}

	private Bundle installContentTypes(String tag, int numberOfLevels, int nodesPerLevel) {
	TestRegistryChangeListener listener = new TestRegistryChangeListener(Platform.PI_RUNTIME, ContentTypeBuilder.PT_CONTENTTYPES, null, null);
	Bundle installed = null;
	listener.register();
	try {
	IPath pluginLocation = getExtraPluginLocation();
	pluginLocation.toFile().mkdirs();
	URL installURL = null;
	try {
	installURL = pluginLocation.toFile().toURL();
	} catch (MalformedURLException e) {
	fail(tag + ".0.5", e);
	}
	Writer writer = null;
	try {
	writer = new BufferedWriter(new FileWriter(pluginLocation.append("plugin.xml").toFile()), 0x10000);
	writer.write("<plugin id=\"" + TEST_DATA_ID + "\" name=\"Content Type Performance Test Data\" version=\"1\">");
	writer.write(System.getProperty("line.separator"));
	writer.write("<requires><import plugin=\"" + PI_RUNTIME_TESTS + "\"/></requires>");
	writer.write(System.getProperty("line.separator"));
	writer.write("<extension point=\"org.eclipse.core.runtime.contentTypes\">");
	writer.write(System.getProperty("line.separator"));
	String root = createContentType(writer, 0, null);
	createContentTypes(writer, root, 1, numberOfLevels, nodesPerLevel);
	writer.write("</extension></plugin>");
	} catch (IOException e) {
	fail(tag + ".1.0", e);
	} finally {
	if (writer != null)
	try {
	writer.close();
	} catch (IOException e) {
	fail("1.1", e);
	}
	}
	try {
	installed = RuntimeTestsPlugin.getContext().installBundle(installURL.toExternalForm());
	} catch (BundleException e) {
	fail(tag + ".3.0", e);
	}
	BundleTestingHelper.refreshPackages(RuntimeTestsPlugin.getContext(), new Bundle[] {installed});
	assertTrue(tag + ".4.0", listener.eventReceived(10000));
	} finally {
	listener.unregister();
	}
	return installed;
	}

	/**
	* Warms up the content type registry.
	*/
	private void loadChildren() {
	final IContentTypeManager manager = Platform.getContentTypeManager();
	IContentType[] allTypes = manager.getAllContentTypes();
	for (int i = 0; i < allTypes.length; i++) {
	String[] fileNames = allTypes[i].getFileSpecs(IContentType.IGNORE_USER_DEFINED \| IContentType.FILE_NAME_SPEC);
	for (int j = 0; j < fileNames.length; j++)
	manager.findContentTypeFor(fileNames[j]);
	String[] fileExtensions = allTypes[i].getFileSpecs(IContentType.IGNORE_USER_DEFINED \| IContentType.FILE_EXTENSION_SPEC);
	for (int j = 0; j < fileExtensions.length; j++)
	manager.findContentTypeFor("anyname." + fileExtensions[j]);
	}
	}

	/**
	* Returns a loaded content type manager. Except for load time tests, this method should
	* be called outside the scope of performance monitoring.
	*/
	private IContentTypeManager loadContentTypeManager() {
	// any cheap interaction that causes the catalog to be built
	Platform.getContentTypeManager().getContentType(IContentTypeManager.CT_TEXT);
	return Platform.getContentTypeManager();
	}

	/** Forces all describers to be loaded.*/
	private void loadDescribers() {
	final IContentTypeManager manager = Platform.getContentTypeManager();
	IContentType[] allTypes = manager.getAllContentTypes();
	for (int i = 0; i < allTypes.length; i++)
	((ContentTypeHandler) allTypes[i]).getTarget().getDescriber();
	}

	private void loadPreferences() {
	new InstanceScope().getNode(CONTENT_TYPE_PREF_NODE);
	}

	/** Tests how much the size of the catalog affects the performance of content type matching by content analysis */
	public void testContentMatching() {
	loadPreferences();
	// warm up content type registry
	final IContentTypeManager manager = loadContentTypeManager();
	loadDescribers();
	loadChildren();
	new PerformanceTestRunner() {
	protected void test() {
	try {
	for (int i = 0; i < TOTAL_NUMBER_OF_ELEMENTS; i++) {
	String id = getContentTypeId(i);
	IContentType[] result = manager.findContentTypesFor(new ByteArrayInputStream(getSignature(i)), DEFAULT_NAME);
	assertEquals("1.0." + i, 1, result.length);
	assertEquals("1.1." + i, id, result[0].getId());
	}
	} catch (IOException e) {
	fail("2.0", e);
	}
	}
	}.run(this, 10, 2);
	}

	/* (non-Javadoc)
	* @see junit.framework.TestCase#setUp()
	*/
	protected void setUp() throws Exception {
	super.setUp();
	if (getName().equals("testDoSetUp") \|\| getName().equals("testDoTearDown"))
	return;
	Bundle installed = null;
	try {
	installed = RuntimeTestsPlugin.getContext().installBundle(getExtraPluginLocation().toFile().toURL().toExternalForm());
	} catch (BundleException e) {
	fail("1.0", e);
	} catch (MalformedURLException e) {
	fail("2.0", e);
	}
	BundleTestingHelper.refreshPackages(RuntimeTestsPlugin.getContext(), new Bundle[] {installed});
	}

	public void testDoSetUp() {
	installContentTypes("1.0", NUMBER_OF_LEVELS, ELEMENTS_PER_LEVEL);
	}

	public void testDoTearDown() {
	ensureDoesNotExistInFileSystem(getExtraPluginLocation().toFile());
	}

	public void testIsKindOf() {
	// warm up preference service
	loadPreferences();
	// warm up content type registry
	final IContentTypeManager manager = loadContentTypeManager();
	loadChildren();
	final IContentType root = manager.getContentType(getContentTypeId(0));
	assertNotNull("2.0", root);
	new PerformanceTestRunner() {
	protected void test() {
	for (int i = 0; i < TOTAL_NUMBER_OF_ELEMENTS; i++) {
	IContentType type = manager.getContentType(getContentTypeId(i));
	assertNotNull("3.0." + i, type);
	assertTrue("3.1." + i, type.isKindOf(root));
	}
	}
	}.run(this, 10, 500);
	}

	/**
	* This test is intended for running as a session test.
	*/
	public void testLoadCatalog() {
	// warm up preference service
	loadPreferences();
	PerformanceTestRunner runner = new PerformanceTestRunner() {
	protected void test() {
	// any interation that will cause the registry to be loaded
	Platform.getContentTypeManager().getContentType(IContentTypeManager.CT_TEXT);
	}
	};
	runner.run(this, 1, /* must run only once - the suite controls how many sessions are run */1);
	// sanity check to make sure we are running with good data
	assertEquals("missing content types", TOTAL_NUMBER_OF_ELEMENTS, countTestContentTypes(Platform.getContentTypeManager().getAllContentTypes()));
	}

	/** Tests how much the size of the catalog affects the performance of content type matching by name */
	public void testNameMatching() {
	// warm up preference service
	loadPreferences();
	// warm up content type registry
	final IContentTypeManager manager = loadContentTypeManager();
	loadDescribers();
	loadChildren();
	new PerformanceTestRunner() {
	protected void test() {
	IContentType[] associated = manager.findContentTypesFor("foo.txt");
	// we know at least the etxt content type should be here
	assertTrue("2.0", associated.length >= 1);
	// and it is supposed to be the first one (since it is at the root)
	assertEquals("2.1", IContentTypeManager.CT_TEXT, associated[0].getId());
	}
	}.run(this, 10, 200000);
	}
	}