remove XXX HACK from native library loader

also add additional integration tests for
AppSettings, Application, and NativeLibraryLoader

jme3-desktop/src/test/java/LibraryLoaderTest.java → jme3-core/src/test/java/com/jme3/IntegrationTest.java

@@ -29,22 +29,7 @@
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+package com.jme3;
 
-import com.jme3.system.NativeLibraryLoader;
-import java.io.File;
-import java.util.Arrays;
-import org.junit.Test;
-
-/**
- *
- * @author Kirill Vainer
- */
-public class LibraryLoaderTest {
-    
-    @Test
-    public void whatever() {
-        File[] nativeJars = NativeLibraryLoader.getJarsWithNatives();
-        System.out.println(Arrays.toString(nativeJars));
-    }
-    
+public interface IntegrationTest {
 }

jme3-core/src/test/java/com/jme3/app/AppSettingsIT.java

@@ -0,0 +1,60 @@
+package com.jme3.app;
+
+import com.jme3.IntegrationTest;
+import com.jme3.scene.Mesh;
+import com.jme3.system.AppSettings;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.prefs.BackingStoreException;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+import org.junit.experimental.categories.Category;
+
+@Category(IntegrationTest.class)
+public class AppSettingsIT {
+
+    private static final String APPSETTINGS_KEY = "JME_AppSettingsTest";
+
+    @Test
+    public void testPreferencesSaveLoad() throws BackingStoreException {
+        AppSettings settings = new AppSettings(false);
+        settings.putBoolean("TestBool", true);
+        settings.putInteger("TestInt", 123);
+        settings.putString("TestStr", "HelloWorld");
+        settings.putFloat("TestFloat", 123.567f);
+        settings.put("TestObj", new Mesh()); // Objects not supported by preferences
+        settings.save(APPSETTINGS_KEY);
+
+        AppSettings loadedSettings = new AppSettings(false);
+        loadedSettings.load(APPSETTINGS_KEY);
+
+        assertEquals(true, loadedSettings.getBoolean("TestBool"));
+        assertEquals(123, loadedSettings.getInteger("TestInt"));
+        assertEquals("HelloWorld", loadedSettings.getString("TestStr"));
+        assertEquals(123.567f, loadedSettings.get("TestFloat"));
+    }
+
+    @Test
+    public void testStreamSaveLoad() throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+
+        AppSettings settings = new AppSettings(false);
+        settings.putBoolean("TestBool", true);
+        settings.putInteger("TestInt", 123);
+        settings.putString("TestStr", "HelloWorld");
+        settings.putFloat("TestFloat", 123.567f);
+        settings.put("TestObj", new Mesh()); // Objects not supported by file settings
+        settings.save(baos);
+
+        AppSettings loadedSettings = new AppSettings(false);
+        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
+        loadedSettings.load(bais);
+
+        assertEquals(true, loadedSettings.getBoolean("TestBool"));
+        assertEquals(123, loadedSettings.getInteger("TestInt"));
+        assertEquals("HelloWorld", loadedSettings.getString("TestStr"));
+        assertEquals(123.567f, loadedSettings.get("TestFloat"));
+    }
+}

jme3-core/src/test/java/com/jme3/app/ApplicationTest.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2009-2015 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.app;
+
+import com.jme3.system.AppSettings;
+import com.jme3.system.JmeContext.Type;
+import com.jme3.system.JmeSystem;
+import com.jme3.system.JmeSystemDelegate;
+import com.jme3.system.NullContext;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import static org.mockito.Mockito.*;
+import org.mockito.runners.MockitoJUnitRunner;
+
+@RunWith(MockitoJUnitRunner.class)
+public class ApplicationTest {
+
+    @Before
+    public void setUp() {
+        Logger.getLogger("com.jme3").setLevel(Level.OFF);
+    }
+
+    private static class NullDisplayContext extends NullContext {
+
+        @Override
+        public Type getType() {
+            return Type.Display;
+        }
+    }
+
+    @Test
+    public void testExceptionInvokesHandleError() throws InterruptedException {
+        JmeSystemDelegate del = mock(JmeSystemDelegate.class);
+        JmeSystem.setSystemDelegate(del);
+
+        Application app = new Application() {
+            @Override
+            public void update() {
+                super.update();
+                throw new IllegalStateException("Some Error");
+            }
+        };
+
+        when(del.newContext((AppSettings) anyObject(), eq(Type.Display))).thenReturn(new NullDisplayContext());
+
+        app.start(true);
+        app.stop(true);
+
+        verify(del).showErrorDialog(anyString());
+    }
+}

jme3-desktop/build.gradle

@@ -4,4 +4,5 @@ if (!hasProperty('mainClass')) {
 
 dependencies {
     compile project(':jme3-core')
+    testCompile project(path: ':jme3-core', configuration: 'testOutput')
 }

jme3-desktop/src/main/java/com/jme3/system/NativeLibraryLoader.java

@@ -35,6 +35,8 @@ import java.io.*;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLConnection;
+import java.nio.channels.FileLock;
+import java.nio.channels.OverlappingFileLockException;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
@@ -44,9 +46,9 @@ import java.util.logging.Logger;
 /**
  * Utility class to register, extract, and load native libraries.
  * <br>
- * Register your own libraries via the {@link #registerNativeLibrary(String, Platform, String, String)} method, for
- * each platform.
- * You can then extract this library (depending on platform), by
+ * Register your own libraries via the
+ * {@link #registerNativeLibrary(String, Platform, String, String)} method, for
+ * each platform. You can then extract this library (depending on platform), by
  * using {@link #loadNativeLibrary(java.lang.String, boolean) }.
  * <br>
  * Example:<br>
@@ -62,80 +64,82 @@ import java.util.logging.Logger;
  * This will register the library. Load it via: <br>
  * <code><pre>
  * NativeLibraryLoader.loadNativeLibrary("mystuff", true);
- * </pre></code>
- * It will load the right library automatically based on the platform.
- * 
+ * </pre></code> It will load the right library automatically based on the
+ * platform.
+ *
  * @author Kirill Vainer
  */
 public final class NativeLibraryLoader {
-    
+
     private static final Logger logger = Logger.getLogger(NativeLibraryLoader.class.getName());
     private static final byte[] buf = new byte[1024 * 100];
     private static File extractionFolderOverride = null;
     private static File extractionFolder = null;
-    
+
     private static final HashMap<NativeLibrary.Key, NativeLibrary> nativeLibraryMap
             = new HashMap<NativeLibrary.Key, NativeLibrary>();
-    
+
     /**
      * Register a new known library.
-     * 
+     *
      * This simply registers a known library, the actual extraction and loading
-     * is performed by calling {@link #loadNativeLibrary(java.lang.String, boolean) }.
-     * 
-     * @param name The name / ID of the library (not OS or architecture specific).
-     * @param platform The platform for which the in-natives-jar path has 
-     * been specified for.
-     * @param path The path inside the natives-jar or classpath
-     * corresponding to this library. Must be compatible with the platform 
-     * argument.
-     * @param extractAsName The filename that the library should be extracted as,
-     * if null, use the same name as in the path.
+     * is performed by calling {@link #loadNativeLibrary(java.lang.String, boolean)
+     * }.
+     *
+     * @param name The name / ID of the library (not OS or architecture
+     * specific).
+     * @param platform The platform for which the in-natives-jar path has been
+     * specified for.
+     * @param path The path inside the natives-jar or classpath corresponding to
+     * this library. Must be compatible with the platform argument.
+     * @param extractAsName The filename that the library should be extracted
+     * as, if null, use the same name as in the path.
      */
     public static void registerNativeLibrary(String name, Platform platform,
             String path, String extractAsName) {
         nativeLibraryMap.put(new NativeLibrary.Key(name, platform),
                 new NativeLibrary(name, platform, path, extractAsName));
     }
-    
+
     /**
      * Register a new known JNI library.
-     * 
+     *
      * This simply registers a known library, the actual extraction and loading
-     * is performed by calling {@link #loadNativeLibrary(java.lang.String, boolean) }.
-     * 
-     * This method should be called several times for each library name, 
-     * each time specifying a different platform + path combination.
-     * 
-     * @param name The name / ID of the library (not OS or architecture specific).
-     * @param platform The platform for which the in-natives-jar path has 
-     * been specified for.
-     * @param path The path inside the natives-jar or classpath
-     * corresponding to this library. Must be compatible with the platform 
-     * argument.
+     * is performed by calling {@link #loadNativeLibrary(java.lang.String, boolean)
+     * }.
+     *
+     * This method should be called several times for each library name, each
+     * time specifying a different platform + path combination.
+     *
+     * @param name The name / ID of the library (not OS or architecture
+     * specific).
+     * @param platform The platform for which the in-natives-jar path has been
+     * specified for.
+     * @param path The path inside the natives-jar or classpath corresponding to
+     * this library. Must be compatible with the platform argument.
      */
     public static void registerNativeLibrary(String name, Platform platform,
             String path) {
         registerNativeLibrary(name, platform, path, null);
     }
-    
+
     static {
         // LWJGL
         registerNativeLibrary("lwjgl", Platform.Windows32, "native/windows/lwjgl.dll");
         registerNativeLibrary("lwjgl", Platform.Windows64, "native/windows/lwjgl64.dll");
-        registerNativeLibrary("lwjgl", Platform.Linux32,   "native/linux/liblwjgl.so");
-        registerNativeLibrary("lwjgl", Platform.Linux64,   "native/linux/liblwjgl64.so");
-        registerNativeLibrary("lwjgl", Platform.MacOSX32,  "native/macosx/liblwjgl.dylib");
-        registerNativeLibrary("lwjgl", Platform.MacOSX64,  "native/macosx/liblwjgl.dylib");
+        registerNativeLibrary("lwjgl", Platform.Linux32, "native/linux/liblwjgl.so");
+        registerNativeLibrary("lwjgl", Platform.Linux64, "native/linux/liblwjgl64.so");
+        registerNativeLibrary("lwjgl", Platform.MacOSX32, "native/macosx/liblwjgl.dylib");
+        registerNativeLibrary("lwjgl", Platform.MacOSX64, "native/macosx/liblwjgl.dylib");
 
         // OpenAL
         // For OSX: Need to add lib prefix when extracting
         registerNativeLibrary("openal", Platform.Windows32, "native/windows/OpenAL32.dll");
         registerNativeLibrary("openal", Platform.Windows64, "native/windows/OpenAL64.dll");
-        registerNativeLibrary("openal", Platform.Linux32,   "native/linux/libopenal.so");
-        registerNativeLibrary("openal", Platform.Linux64,   "native/linux/libopenal64.so");
-        registerNativeLibrary("openal", Platform.MacOSX32,  "native/macosx/openal.dylib", "libopenal.dylib");
-        registerNativeLibrary("openal", Platform.MacOSX64,  "native/macosx/openal.dylib", "libopenal.dylib");
+        registerNativeLibrary("openal", Platform.Linux32, "native/linux/libopenal.so");
+        registerNativeLibrary("openal", Platform.Linux64, "native/linux/libopenal64.so");
+        registerNativeLibrary("openal", Platform.MacOSX32, "native/macosx/openal.dylib", "libopenal.dylib");
+        registerNativeLibrary("openal", Platform.MacOSX64, "native/macosx/openal.dylib", "libopenal.dylib");
 
         // LWJGL 3.x
         registerNativeLibrary("lwjgl3", Platform.Windows32, "native/windows/lwjgl32.dll");
@@ -173,39 +177,39 @@ public final class NativeLibraryLoader {
         // BulletJme
         registerNativeLibrary("bulletjme", Platform.Windows32, "native/windows/x86/bulletjme.dll");
         registerNativeLibrary("bulletjme", Platform.Windows64, "native/windows/x86_64/bulletjme.dll");
-        registerNativeLibrary("bulletjme", Platform.Linux32,   "native/linux/x86/libbulletjme.so");
-        registerNativeLibrary("bulletjme", Platform.Linux64,   "native/linux/x86_64/libbulletjme.so");
-        registerNativeLibrary("bulletjme", Platform.MacOSX32,  "native/osx/x86/libbulletjme.dylib");
-        registerNativeLibrary("bulletjme", Platform.MacOSX64,  "native/osx/x86_64/libbulletjme.dylib");
-        
+        registerNativeLibrary("bulletjme", Platform.Linux32, "native/linux/x86/libbulletjme.so");
+        registerNativeLibrary("bulletjme", Platform.Linux64, "native/linux/x86_64/libbulletjme.so");
+        registerNativeLibrary("bulletjme", Platform.MacOSX32, "native/osx/x86/libbulletjme.dylib");
+        registerNativeLibrary("bulletjme", Platform.MacOSX64, "native/osx/x86_64/libbulletjme.dylib");
+
         // JInput
         // For OSX: Need to rename extension jnilib -> dylib when extracting
         registerNativeLibrary("jinput", Platform.Windows32, "native/windows/jinput-raw.dll");
         registerNativeLibrary("jinput", Platform.Windows64, "native/windows/jinput-raw_64.dll");
-        registerNativeLibrary("jinput", Platform.Linux32,   "native/windows/libjinput-linux.so");
-        registerNativeLibrary("jinput", Platform.Linux64,   "native/windows/libjinput-linux64.so");
-        registerNativeLibrary("jinput", Platform.MacOSX32,  "native/macosx/libjinput-osx.jnilib", "libjinput-osx.dylib");
-        registerNativeLibrary("jinput", Platform.MacOSX64,  "native/macosx/libjinput-osx.jnilib", "libjinput-osx.dylib");
-        
+        registerNativeLibrary("jinput", Platform.Linux32, "native/windows/libjinput-linux.so");
+        registerNativeLibrary("jinput", Platform.Linux64, "native/windows/libjinput-linux64.so");
+        registerNativeLibrary("jinput", Platform.MacOSX32, "native/macosx/libjinput-osx.jnilib", "libjinput-osx.dylib");
+        registerNativeLibrary("jinput", Platform.MacOSX64, "native/macosx/libjinput-osx.jnilib", "libjinput-osx.dylib");
+
         // JInput Auxiliary (only required on Windows)
         registerNativeLibrary("jinput-dx8", Platform.Windows32, "native/windows/jinput-dx8.dll");
         registerNativeLibrary("jinput-dx8", Platform.Windows64, "native/windows/jinput-dx8_64.dll");
-        registerNativeLibrary("jinput-dx8", Platform.Linux32,   null);
-        registerNativeLibrary("jinput-dx8", Platform.Linux64,   null);
-        registerNativeLibrary("jinput-dx8", Platform.MacOSX32,  null);
-        registerNativeLibrary("jinput-dx8", Platform.MacOSX64,  null);
+        registerNativeLibrary("jinput-dx8", Platform.Linux32, null);
+        registerNativeLibrary("jinput-dx8", Platform.Linux64, null);
+        registerNativeLibrary("jinput-dx8", Platform.MacOSX32, null);
+        registerNativeLibrary("jinput-dx8", Platform.MacOSX64, null);
     }
-    
+
     private NativeLibraryLoader() {
     }
-    
+
     /**
      * Determine if native bullet is on the classpath.
-     * 
-     * Currently the context extracts the native bullet libraries, so
-     * this method is needed to determine if it is needed.
-     * Ideally, native bullet should be responsible for its own natives.
-     * 
+     *
+     * Currently the context extracts the native bullet libraries, so this
+     * method is needed to determine if it is needed. Ideally, native bullet
+     * should be responsible for its own natives.
+     *
      * @return True native bullet is on the classpath, false otherwise.
      */
     public static boolean isUsingNativeBullet() {
@@ -216,35 +220,37 @@ public final class NativeLibraryLoader {
             return false;
         }
     }
-    
+
     /**
-     * Specify a custom location where native libraries should
-     * be extracted to. Ensure this is a unique path not used
-     * by other applications to extract their libraries.
-     * Set to <code>null</code> to restore default
+     * Specify a custom location where native libraries should be extracted to.
+     * Ensure this is a unique path not used by other applications to extract
+     * their libraries. Set to <code>null</code> to restore default
      * functionality.
-     * 
+     *
      * @param path Path where to extract native libraries.
      */
     public static void setCustomExtractionFolder(String path) {
-        extractionFolderOverride = new File(path).getAbsoluteFile();
+        if (path != null) {
+            extractionFolderOverride = new File(path).getAbsoluteFile();
+        } else {
+            extractionFolderOverride = null;
+        }
     }
 
     /**
-     * Returns the folder where native libraries will be extracted.
-     * This is automatically determined at run-time based on the 
-     * following criteria:<br>
+     * Returns the folder where native libraries will be extracted. This is
+     * automatically determined at run-time based on the following criteria:<br>
      * <ul>
      * <li>If a {@link #setCustomExtractionFolder(java.lang.String) custom
      * extraction folder} has been specified, it is returned.
-     * <li>If the user can write to the working folder, then it 
-     * is returned.</li>
-     * <li>Otherwise, the {@link JmeSystem#getStorageFolder() storage folder}
-     * is used, to prevent collisions, a special subfolder is used
-     * called <code>natives_&lt;hash&gt;</code> where &lt;hash&gt;
-     * is computed automatically as the XOR of the classpath hash code
-     * and the last modified date of this class.
-     * 
+     * <li>If the user can write to the working folder, then it is
+     * returned.</li>
+     * <li>Otherwise, the {@link JmeSystem#getStorageFolder() storage folder} is
+     * used, to prevent collisions, a special subfolder is used called
+     * <code>natives_&lt;hash&gt;</code> where &lt;hash&gt; is computed
+     * automatically as the XOR of the classpath hash code and the last modified
+     * date of this class.
+     *
      * @return Path where natives will be extracted to.
      */
     public static File getExtractionFolder() {
@@ -268,27 +274,27 @@ public final class NativeLibraryLoader {
         }
         return extractionFolder;
     }
-    
+
     /**
      * Determine jME3's cache folder for the user account based on the OS.
-     * 
-     * If the OS cache folder is missing, the assumption is that this
-     * particular version of the OS does not have a dedicated cache folder,
-     * hence, we use the user's home folder instead as the root.
-     * 
+     *
+     * If the OS cache folder is missing, the assumption is that this particular
+     * version of the OS does not have a dedicated cache folder, hence, we use
+     * the user's home folder instead as the root.
+     *
      * The folder returned is as follows:<br>
      * <ul>
      * <li>Windows: ~\AppData\Local\jme3</li>
      * <li>Mac OS X: ~/Library/Caches/jme3</li>
      * <li>Linux: ~/.cache/jme3</li>
      * </ul>
-     * 
+     *
      * @return the user cache folder.
      */
     private static File getJmeUserCacheFolder() {
         File userHomeFolder = new File(System.getProperty("user.home"));
         File userCacheFolder = null;
-        
+
         switch (JmeSystem.getPlatform()) {
             case Linux32:
             case Linux64:
@@ -305,31 +311,31 @@ public final class NativeLibraryLoader {
                 userCacheFolder = new File(new File(userHomeFolder, "AppData"), "Local");
                 break;
         }
-        
+
         if (userCacheFolder == null || !userCacheFolder.exists()) {
             // Fallback to home directory if cache folder is missing
             return new File(userHomeFolder, ".jme3");
         }
-        
+
         return new File(userCacheFolder, "jme3");
     }
 
     private static void setExtractionFolderToUserCache() {
         File extractFolderInHome = getJmeUserCacheFolder();
-        
+
         if (!extractFolderInHome.exists()) {
             extractFolderInHome.mkdir();
         }
-        
+
         extractionFolder = new File(extractFolderInHome, "natives_" + Integer.toHexString(computeNativesHash()));
-        
+
         if (!extractionFolder.exists()) {
             extractionFolder.mkdir();
         }
-        
+
         logger.log(Level.WARNING, "Working directory is not writable. "
-                                + "Natives will be extracted to:\n{0}", 
-                                extractionFolder);
+                + "Natives will be extracted to:\n{0}",
+                extractionFolder);
     }
 
     private static int computeNativesHash() {
@@ -360,11 +366,12 @@ public final class NativeLibraryLoader {
                 try {
                     conn.getInputStream().close();
                     conn.getOutputStream().close();
-                } catch (IOException ex) { }
+                } catch (IOException ex) {
+                }
             }
         }
     }
-    
+
     public static File[] getJarsWithNatives() {
         HashSet<File> jarFiles = new HashSet<File>();
         for (Map.Entry<NativeLibrary.Key, NativeLibrary> lib : nativeLibraryMap.entrySet()) {
@@ -375,7 +382,7 @@ public final class NativeLibraryLoader {
         }
         return jarFiles.toArray(new File[0]);
     }
-    
+
     public static void extractNativeLibraries(Platform platform, File targetDir) throws IOException {
         for (Map.Entry<NativeLibrary.Key, NativeLibrary> lib : nativeLibraryMap.entrySet()) {
             if (lib.getValue().getPlatform() == platform) {
@@ -386,7 +393,7 @@ public final class NativeLibraryLoader {
             }
         }
     }
-    
+
     private static String mapLibraryName_emulated(String name, Platform platform) {
         switch (platform) {
             case MacOSX32:
@@ -399,10 +406,10 @@ public final class NativeLibraryLoader {
                 return name + ".so";
         }
     }
-    
+
     /**
-     * Removes platform-specific portions of a library file name so
-     * that it can be accepted by {@link System#loadLibrary(java.lang.String) }.
+     * Removes platform-specific portions of a library file name so that it can
+     * be accepted by {@link System#loadLibrary(java.lang.String) }.
      * <p>
      * E.g.<br>
      * <ul>
@@ -410,7 +417,7 @@ public final class NativeLibraryLoader {
      * <li>liblwjgl64.so => lwjgl64</li>
      * <li>libopenal.so => openal</li>
      * </ul>
-     * 
+     *
      * @param filename The filename to strip platform-specific parts
      * @return The stripped library name
      */
@@ -425,7 +432,7 @@ public final class NativeLibraryLoader {
         }
         return sb.toString();
     }
-    
+
     public static File getJarForNativeLibrary(Platform platform, String name) {
         NativeLibrary library = nativeLibraryMap.get(new NativeLibrary.Key(name, platform));
         if (library == null) {
@@ -436,23 +443,23 @@ public final class NativeLibraryLoader {
         if (pathInJar == null) {
             return null;
         }
-        
+
         String fileNameInJar;
         if (pathInJar.contains("/")) {
             fileNameInJar = pathInJar.substring(pathInJar.lastIndexOf("/") + 1);
         } else {
             fileNameInJar = pathInJar;
         }
-        
+
         URL url = Thread.currentThread().getContextClassLoader().getResource(pathInJar);
         if (url == null) {
             url = Thread.currentThread().getContextClassLoader().getResource(fileNameInJar);
         }
-        
+
         if (url == null) {
             return null;
         }
-        
+
         StringBuilder sb = new StringBuilder(url.toString());
         if (sb.indexOf("jar:file:/") == 0) {
             sb.delete(0, 9);
@@ -462,7 +469,7 @@ public final class NativeLibraryLoader {
             return null; // not a jar
         }
     }
-    
+
     public static void extractNativeLibrary(Platform platform, String name, File targetDir) throws IOException {
         NativeLibrary library = nativeLibraryMap.get(new NativeLibrary.Key(name, platform));
         if (library == null) {
@@ -473,19 +480,19 @@ public final class NativeLibraryLoader {
         if (pathInJar == null) {
             return;
         }
-        
+
         String fileNameInJar;
         if (pathInJar.contains("/")) {
             fileNameInJar = pathInJar.substring(pathInJar.lastIndexOf("/") + 1);
         } else {
             fileNameInJar = pathInJar;
         }
-        
+
         URL url = Thread.currentThread().getContextClassLoader().getResource(pathInJar);
         if (url == null) {
             url = Thread.currentThread().getContextClassLoader().getResource(fileNameInJar);
         }
-        
+
         if (url == null) {
             return;
         }
@@ -496,10 +503,10 @@ public final class NativeLibraryLoader {
         } else {
             loadedAsFileName = fileNameInJar;
         }
-        
+
         URLConnection conn = url.openConnection();
         InputStream in = conn.getInputStream();
-        
+
         File targetFile = new File(targetDir, loadedAsFileName);
         OutputStream out = null;
         try {
@@ -526,12 +533,26 @@ public final class NativeLibraryLoader {
 
     /**
      * First extracts the native library and then loads it.
-     * 
+     *
      * @param name The name of the library to load.
-     * @param isRequired If true and the library fails to load, throw exception. If
-     * false, do nothing if it fails to load.
+     * @param isRequired If true and the library fails to load, throw exception.
+     * If false, do nothing if it fails to load.
      */
     public static void loadNativeLibrary(String name, boolean isRequired) {
+        loadNativeLibrary(name, isRequired, true);
+    }
+
+    /**
+     * First extracts the native library and then (optionally) loads it.
+     *
+     * @param name The name of the library to load.
+     * @param isRequired If true and the library fails to load, throw exception.
+     * If false, do nothing if it fails to load.
+     * @param loadLibrary If true, call
+     * {@link System#loadLibrary(java.lang.String)} on the library, otherwise,
+     * do nothing after extraction.
+     */
+    public static void loadNativeLibrary(String name, boolean isRequired, boolean loadLibrary) {
         if (JmeSystem.isLowPermissions()) {
             throw new UnsupportedOperationException("JVM is running under "
                     + "reduced permissions. Cannot load native libraries.");
@@ -539,7 +560,7 @@ public final class NativeLibraryLoader {
 
         Platform platform = JmeSystem.getPlatform();
         NativeLibrary library = nativeLibraryMap.get(new NativeLibrary.Key(name, platform));
-        
+
         if (library == null) {
             // No library exists for this platform.
             if (isRequired) {
@@ -547,20 +568,20 @@ public final class NativeLibraryLoader {
                         "The required native library '" + name + "'"
                         + " is not available for your OS: " + platform);
             } else {
-                logger.log(Level.FINE, "The optional native library ''{0}''" +
-                                       " is not available for your OS: {1}", 
-                                       new Object[]{name, platform});
+                logger.log(Level.FINE, "The optional native library ''{0}''"
+                        + " is not available for your OS: {1}",
+                        new Object[]{name, platform});
                 return;
             }
         }
-        
+
         final String pathInJar = library.getPathInNativesJar();
 
         if (pathInJar == null) {
             // This platform does not require the native library to be loaded.
             return;
         }
-        
+
         final String fileNameInJar;
 
         if (pathInJar.contains("/")) {
@@ -570,7 +591,7 @@ public final class NativeLibraryLoader {
         }
 
         URL url = Thread.currentThread().getContextClassLoader().getResource(pathInJar);
-        
+
         if (url == null) {
             // Try the root of the classpath as well.
             url = Thread.currentThread().getContextClassLoader().getResource(fileNameInJar);
@@ -578,15 +599,15 @@ public final class NativeLibraryLoader {
 
         if (url == null) {
             // Attempt to load it as a system library.
+            // Need to unmap it from library specific parts.
             String unmappedName = unmapLibraryName(fileNameInJar);
             try {
-                // XXX: HACK. Vary loading method based on library name..
-                // lwjgl and jinput handle loading by themselves.
-                if (!name.equals("lwjgl") && !name.equals("jinput")) {
-                    // Need to unmap it from library specific parts.
+                if (loadLibrary) {
                     System.loadLibrary(unmappedName);
                     logger.log(Level.FINE, "Loaded system installed "
                             + "version of native library: {0}", unmappedName);
+                } else {
+                    throw new UnsatisfiedLinkError();
                 }
             } catch (UnsatisfiedLinkError e) {
                 if (isRequired) {
@@ -595,16 +616,16 @@ public final class NativeLibraryLoader {
                             + " was not found in the classpath via '" + pathInJar
                             + "'. Error message: " + e.getMessage());
                 } else {
-                    logger.log(Level.FINE, "The optional native library ''{0}''" + 
-                                           " was not found in the classpath via ''{1}''" +
-                                           ". Error message: {2}",
-                                           new Object[]{unmappedName, pathInJar, e.getMessage()});
+                    logger.log(Level.FINE, "The optional native library ''{0}''"
+                            + " was not found in the classpath via ''{1}''"
+                            + ". Error message: {2}",
+                            new Object[]{unmappedName, pathInJar, e.getMessage()});
                 }
             }
-            
+
             return;
         }
-        
+
         // The library has been found and is ready to be extracted.
         // Determine what filename it should be extracted as.
         String loadedAsFileName;
@@ -614,53 +635,57 @@ public final class NativeLibraryLoader {
             // Just use the original filename as it is in the JAR.
             loadedAsFileName = fileNameInJar;
         }
-        
+
         File extactionDirectory = getExtractionFolder();
         URLConnection conn;
         InputStream in;
-        
+
         try {
             conn = url.openConnection();
             in = conn.getInputStream();
         } catch (IOException ex) {
             // Maybe put more detail here? Not sure..
-            throw new UnsatisfiedLinkError("Failed to open file: '" + url + 
-                                           "'. Error: " + ex);
+            throw new UnsatisfiedLinkError("Failed to open file: '" + url
+                    + "'. Error: " + ex);
         }
-        
+
         File targetFile = new File(extactionDirectory, loadedAsFileName);
-        OutputStream out = null;
+        FileOutputStream out = null;
         try {
             if (targetFile.exists()) {
-                // OK, compare last modified date of this file to 
+                // OK, compare last modified date of this file to
                 // file in jar
                 long targetLastModified = targetFile.lastModified();
                 long sourceLastModified = conn.getLastModified();
 
                 // Allow ~1 second range for OSes that only support low precision
-                if (targetLastModified + 1000 > sourceLastModified) {
-                    logger.log(Level.FINE, "Not copying library {0}. " + 
-                                           "Latest already extracted.", 
-                                           loadedAsFileName);
+                if (Math.abs(targetLastModified - sourceLastModified) < 1000) {
+                    logger.log(Level.FINE, "Not copying library {0}. "
+                            + "Identical version already extracted.",
+                            loadedAsFileName);
                     return;
                 }
             }
 
             out = new FileOutputStream(targetFile);
+            FileLock lock = out.getChannel().lock();
+
             int len;
             while ((len = in.read(buf)) > 0) {
                 out.write(buf, 0, len);
             }
-            
+
             in.close();
             in = null;
             out.close();
             out = null;
 
-            // NOTE: On OSes that support "Date Created" property, 
+            // NOTE: On OSes that support "Date Created" property,
             // this will cause the last modified date to be lower than
             // date created which makes no sense
             targetFile.setLastModified(conn.getLastModified());
+        } catch (OverlappingFileLockException ex) {
+            // do nothing with ex
         } catch (IOException ex) {
             if (ex.getMessage().contains("used by another process")) {
                 return;
@@ -669,30 +694,26 @@ public final class NativeLibraryLoader {
                         + "library to: " + targetFile);
             }
         } finally {
-            // XXX: HACK. Vary loading method based on library name..
-            // lwjgl and jinput handle loading by themselves.
-            if (name.equals("lwjgl") || name.equals("lwjgl3")) {
-                System.setProperty("org.lwjgl.librarypath", 
-                                   extactionDirectory.getAbsolutePath());
-            } else if (name.equals("jinput")) {
-                System.setProperty("net.java.games.input.librarypath", 
-                                   extactionDirectory.getAbsolutePath());
-            } else {
-                // all other libraries (openal, bulletjme, custom)
-                // will load directly in here.
+            if (loadLibrary) {
                 System.load(targetFile.getAbsolutePath());
             }
-            
-            if(in != null){
-                try { in.close(); } catch (IOException ex) { }
+
+            if (in != null) {
+                try {
+                    in.close();
+                } catch (IOException ex) {
+                }
             }
-            if(out != null){
-                try { out.close(); } catch (IOException ex) { }
+            if (out != null) {
+                try {
+                    out.close();
+                } catch (IOException ex) {
+                }
             }
         }
-        
-        logger.log(Level.FINE, "Loaded native library from ''{0}'' into ''{1}''", 
-                   new Object[]{url, targetFile});
+
+        logger.log(Level.FINE, "Loaded native library from ''{0}'' into ''{1}''",
+                new Object[]{url, targetFile});
     }
-    
+
 }

jme3-desktop/src/test/java/com/jme3/system/NativeLibraryLoaderIT.java

@@ -0,0 +1,201 @@
+/*
+ * Copyright (c) 2009-2015 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.system;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.nio.channels.FileLock;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+import org.junit.FixMethodOrder;
+import org.junit.experimental.categories.Category;
+
+import com.jme3.IntegrationTest;
+
+/**
+ * Integration test for {@link NativeLibraryLoader}.
+ *
+ * Note that it uses the file system.
+ *
+ * @author Kirill Vainer
+ */
+@Category(IntegrationTest.class)
+@FixMethodOrder
+public class NativeLibraryLoaderIT {
+
+    private File extractFolder;
+
+    static {
+        NativeLibraryLoader.registerNativeLibrary("test", Platform.Linux64, "natives/linux64/libtest.so");
+        NativeLibraryLoader.registerNativeLibrary("notexist", Platform.Linux64, "natives/linux64/libnotexist.so");
+        NativeLibraryLoader.registerNativeLibrary("nativesfolder", Platform.Linux64, "natives/linux64/libnativesfolder.so");
+        NativeLibraryLoader.registerNativeLibrary("jarroot", Platform.Linux64, "natives/linux64/libjarroot.so");
+        NativeLibraryLoader.registerNativeLibrary("nullpath", Platform.Linux64, null);
+        NativeLibraryLoader.registerNativeLibrary("jawt", Platform.Linux64, "whatever/doesnt/matter/libjawt.so");
+        NativeLibraryLoader.registerNativeLibrary("asname", Platform.Linux64, "natives/linux64/libasname.so", "other.name");
+    }
+
+    @Before
+    public void setUp() {
+        extractFolder = NativeLibraryLoader.getExtractionFolder();
+    }
+
+    @Test(expected = UnsatisfiedLinkError.class)
+    public void testRequiredNonExistentFile() {
+        NativeLibraryLoader.loadNativeLibrary("notexist", true, false);
+    }
+
+    @Test
+    public void testOptionalNonExistentFile() throws Exception {
+        NativeLibraryLoader.loadNativeLibrary("notexist", false, false);
+    }
+
+    @Test(expected = UnsatisfiedLinkError.class)
+    public void testRequiredUnregisteredLibrary() {
+        NativeLibraryLoader.loadNativeLibrary("unregistered", true, false);
+    }
+
+    @Test
+    public void testOptionalUnregisteredLibrary() {
+        NativeLibraryLoader.loadNativeLibrary("unregistered", false, false);
+    }
+
+    @Test
+    public void testLibraryNullPath() {
+        NativeLibraryLoader.loadNativeLibrary("nullpath", true, false);
+        NativeLibraryLoader.loadNativeLibrary("nullpath", false, false);
+    }
+
+    private static void fudgeLastModifiedTime(File file) {
+        // fudge last modified date to force extraction attempt
+        long yesterdayModifiedtime = file.lastModified() - 24 * 60 * 60 * 1000;
+        assertTrue(file.setLastModified(yesterdayModifiedtime));
+        assertTrue(Math.abs(file.lastModified() - yesterdayModifiedtime) < 10000);
+    }
+
+    @Test
+    public void testDifferentLastModifiedDates() throws IOException {
+        File libFile = new File(extractFolder, "libtest.so");
+
+        assertTrue(libFile.createNewFile());
+        assertTrue(libFile.exists() && libFile.length() == 0);
+
+        fudgeLastModifiedTime(libFile);
+        NativeLibraryLoader.loadNativeLibrary("test", true, false);
+        assertTrue(libFile.length() == 12);
+
+        assertTrue(libFile.delete());
+        assertTrue(!libFile.exists());
+    }
+
+    @Test
+    public void testLibraryInUse() throws IOException {
+        File libFile = new File(extractFolder, "libtest.so");
+
+        NativeLibraryLoader.loadNativeLibrary("test", true, false);
+        assertTrue(libFile.exists());
+
+        fudgeLastModifiedTime(libFile);
+
+        FileOutputStream out = null;
+        try {
+            out = new FileOutputStream(libFile);
+            FileLock lock = out.getChannel().lock();
+            assertTrue(lock.isValid());
+
+            NativeLibraryLoader.loadNativeLibrary("test", true, false);
+        } finally {
+            if (out != null) {
+                out.close();
+            }
+        }
+
+        libFile.delete();
+    }
+
+    @Test
+    public void testLoadSystemLibrary() {
+        NativeLibraryLoader.loadNativeLibrary("jawt", true, true);
+    }
+
+    @Test
+    public void testExtractAsName() {
+        NativeLibraryLoader.loadNativeLibrary("asname", true, false);
+        assertTrue(new File(extractFolder, "other.name").exists());
+        assertTrue(new File(extractFolder, "other.name").delete());
+    }
+
+    @Test
+    public void testCustomExtractFolder() {
+        File customExtractFolder = new File(System.getProperty("java.io.tmpdir"), "jme3_test_tmp");
+        if (!customExtractFolder.exists()) {
+            assertTrue(customExtractFolder.mkdir());
+        }
+
+        NativeLibraryLoader.setCustomExtractionFolder(customExtractFolder.getAbsolutePath());
+        NativeLibraryLoader.loadNativeLibrary("test", true, false);
+
+        assertTrue(new File(customExtractFolder, "libtest.so").exists());
+        assertTrue(new File(customExtractFolder, "libtest.so").delete());
+        assertTrue(!new File(customExtractFolder, "libtest.so").exists());
+
+        NativeLibraryLoader.setCustomExtractionFolder(null);
+        NativeLibraryLoader.loadNativeLibrary("test", true, false);
+
+        assertTrue(new File(extractFolder, "libtest.so").exists());
+        new File(extractFolder, "libtest.so").delete();
+        customExtractFolder.delete();
+    }
+
+    @Test
+    public void testExtractFromNativesFolderInJar() {
+        NativeLibraryLoader.loadNativeLibrary("nativesfolder", true, false);
+
+        File libFile = new File(extractFolder, "libnativesfolder.so");
+        assertTrue(libFile.exists() && libFile.length() == 12);
+
+        libFile.delete();
+    }
+
+    @Test
+    public void testExtractFromJarRoot() {
+        NativeLibraryLoader.loadNativeLibrary("jarroot", true, false);
+
+        File libFile = new File(extractFolder, "libjarroot.so");
+        assertTrue(libFile.exists() && libFile.length() == 12);
+
+        libFile.delete();
+    }
+}

jme3-examples/src/main/java/jme3test/app/TestCustomAppSettings.java

@@ -1,88 +0,0 @@
-package jme3test.app;
-
-import com.jme3.scene.Mesh;
-import com.jme3.system.AppSettings;
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.util.prefs.BackingStoreException;
-
-public class TestCustomAppSettings {
-    
-    private static final String APPSETTINGS_KEY = "JME_AppSettingsTest";
-    
-    private static void assertEqual(Object a, Object b) {
-        if (!a.equals(b)){
-            throw new AssertionError();
-        }
-    }
-    
-    /**
-     * Tests preference based AppSettings.
-     */
-    private static void testPreferenceSettings() {
-        AppSettings settings = new AppSettings(false);
-        settings.putBoolean("TestBool", true);
-        settings.putInteger("TestInt", 123);
-        settings.putString("TestStr", "HelloWorld");
-        settings.putFloat("TestFloat", 123.567f);
-        settings.put("TestObj", new Mesh()); // Objects not supported by preferences
-        
-        try {
-            settings.save(APPSETTINGS_KEY);
-        } catch (BackingStoreException ex) {
-            ex.printStackTrace();
-        }
-        
-        AppSettings loadedSettings = new AppSettings(false);
-        try {
-            loadedSettings.load(APPSETTINGS_KEY);
-        } catch (BackingStoreException ex) {
-            ex.printStackTrace();
-        }
-        
-        assertEqual(loadedSettings.getBoolean("TestBool"), true);
-        assertEqual(loadedSettings.getInteger("TestInt"), 123);
-        assertEqual(loadedSettings.getString("TestStr"), "HelloWorld");
-        assertEqual(loadedSettings.get("TestFloat"), 123.567f);
-    }
-    
-    /**
-     * Test Java properties file based AppSettings.
-     */
-    private static void testFileSettings() {
-        ByteArrayOutputStream baos = new ByteArrayOutputStream();
-        
-        AppSettings settings = new AppSettings(false);
-        settings.putBoolean("TestBool", true);
-        settings.putInteger("TestInt", 123);
-        settings.putString("TestStr", "HelloWorld");
-        settings.putFloat("TestFloat", 123.567f);
-        settings.put("TestObj", new Mesh()); // Objects not supported by file settings
-        
-        try {
-            settings.save(baos);
-        } catch (IOException ex) {
-            ex.printStackTrace();
-        }
-        
-        AppSettings loadedSettings = new AppSettings(false);
-        try {
-            ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
-            loadedSettings.load(bais);
-        } catch (IOException ex) {
-            ex.printStackTrace();
-        }
-        
-        assertEqual(loadedSettings.getBoolean("TestBool"), true);
-        assertEqual(loadedSettings.getInteger("TestInt"), 123);
-        assertEqual(loadedSettings.getString("TestStr"), "HelloWorld");
-        assertEqual(loadedSettings.get("TestFloat"), 123.567f);
-    }
-    
-    public static void main(String[] args){
-        testPreferenceSettings();
-        testFileSettings();
-        System.out.println("All OK");
-    }
-}

jme3-lwjgl/src/main/java/com/jme3/system/lwjgl/LwjglContext.java

@@ -52,6 +52,7 @@ import com.jme3.renderer.opengl.GLTiming;
 import com.jme3.renderer.opengl.GLTimingState;
 import com.jme3.renderer.opengl.GLTracer;
 import com.jme3.system.*;
+import java.io.File;
 
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Level;
@@ -166,17 +167,23 @@ public abstract class LwjglContext implements JmeContext {
         if (JmeSystem.isLowPermissions()) {
             return;
         }
+
+        String extractPath = NativeLibraryLoader.getExtractionFolder().getAbsolutePath();
+
         if ("LWJGL".equals(settings.getAudioRenderer())) {
             NativeLibraryLoader.loadNativeLibrary("openal", true);
         }
         if (settings.useJoysticks()) {
-            NativeLibraryLoader.loadNativeLibrary("jinput", true);
-            NativeLibraryLoader.loadNativeLibrary("jinput-dx8", true);
+            System.setProperty("net.java.games.input.librarypath", extractPath);
+            NativeLibraryLoader.loadNativeLibrary("jinput", true, false);
+            NativeLibraryLoader.loadNativeLibrary("jinput-dx8", true, false);
         }
         if (NativeLibraryLoader.isUsingNativeBullet()) {
             NativeLibraryLoader.loadNativeLibrary("bulletjme", true);
         }
-        NativeLibraryLoader.loadNativeLibrary("lwjgl", true);
+
+        System.setProperty("org.lwjgl.librarypath", extractPath);
+        NativeLibraryLoader.loadNativeLibrary("lwjgl", true, false);
     }
 
     protected int getNumSamplesToUse() {

jme3-lwjgl/src/test/java/com/jme3/app/LwjglAppTest.java → jme3-lwjgl/src/test/java/com/jme3/app/LwjglAppIT.java

@@ -31,6 +31,7 @@
  */
 package com.jme3.app;
 
+import com.jme3.IntegrationTest;
 import com.jme3.renderer.RenderManager;
 import com.jme3.system.JmeContext;
 import java.awt.GraphicsEnvironment;
@@ -41,8 +42,10 @@ import static org.junit.Assert.*;
 import static org.junit.Assume.*;
 import org.junit.Before;
 import org.junit.Test;
+import org.junit.experimental.categories.Category;
 
-public class LwjglAppTest {
+@Category(IntegrationTest.class)
+public class LwjglAppIT {
 
     private final AtomicInteger simpleInitAppInvocations = new AtomicInteger();
     private final AtomicInteger simpleUpdateInvocations = new AtomicInteger();
@@ -66,7 +69,7 @@ public class LwjglAppTest {
         }
     }
 
-    public void doStopStart(Application app, JmeContext.Type type) throws InterruptedException {
+    private void doStopStart(Application app, JmeContext.Type type) throws InterruptedException {
         app.setLostFocusBehavior(LostFocusBehavior.Disabled);
 
         // start the application - simple init / update will be called once.
@@ -96,19 +99,19 @@ public class LwjglAppTest {
     }
 
     @Test
-    public void testDisplayApp() throws InterruptedException {
+    public void testDisplayAppLifeCycle() throws InterruptedException {
         assumeFalse(GraphicsEnvironment.isHeadless());
         doStopStart(new TestApp(), JmeContext.Type.Display);
     }
 
     @Test
-    public void testOffscreenSurface() throws InterruptedException {
+    public void testOffscreenAppLifeCycle() throws InterruptedException {
         assumeFalse(GraphicsEnvironment.isHeadless());
         doStopStart(new TestApp(), JmeContext.Type.OffscreenSurface);
     }
 
     @Test
-    public void testHeadlessApp() throws InterruptedException {
+    public void testExceptionInvokesHandleError() throws InterruptedException {
         doStopStart(new TestApp(), JmeContext.Type.Headless);
     }
 }