SingletonTestCase: Move singleton test impl. from JOGL's UITestCase, inherit from JunitTracer and use it for all tests.

- Certain performance tests don't make sense utilizing several jenkins unit tests on one machine,
  hence singleton test execution is desired.

- JOGL's UITestCase also will derive from this SingletonTestCase

45 files changed, 179 insertions, 92 deletions

diff --git a/src/junit/com/jogamp/common/net/AssetURLConnectionBase.java b/src/junit/com/jogamp/common/net/AssetURLConnectionBase.java
index 40acec9..c6b90b5 100644
--- a/src/junit/com/jogamp/common/net/AssetURLConnectionBase.java
+++ b/src/junit/com/jogamp/common/net/AssetURLConnectionBase.java
@@ -10,9 +10,9 @@ import org.junit.Assert;
 
 import com.jogamp.common.os.AndroidVersion;
 import com.jogamp.common.util.IOUtil;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
-public abstract class AssetURLConnectionBase extends JunitTracer {
+public abstract class AssetURLConnectionBase extends SingletonTestCase {
 
     /** In gluegen-rt.jar */
     protected static final String test_asset_rt_url      = "asset:gluegen/info.txt";
diff --git a/src/junit/com/jogamp/common/net/TestUri01.java b/src/junit/com/jogamp/common/net/TestUri01.java
index a59409f..0ec5bfe 100644
--- a/src/junit/com/jogamp/common/net/TestUri01.java
+++ b/src/junit/com/jogamp/common/net/TestUri01.java
@@ -10,13 +10,13 @@ import org.junit.Test;
 
 import com.jogamp.common.net.URIDumpUtil;
 import com.jogamp.common.util.IOUtil;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestUri01 extends JunitTracer {
+public class TestUri01 extends SingletonTestCase {
 
     @Test
     public void test00BasicCoding() throws IOException, URISyntaxException {
diff --git a/src/junit/com/jogamp/common/net/TestUri02Composing.java b/src/junit/com/jogamp/common/net/TestUri02Composing.java
index 50e8e07..ff7e9bb 100644
--- a/src/junit/com/jogamp/common/net/TestUri02Composing.java
+++ b/src/junit/com/jogamp/common/net/TestUri02Composing.java
@@ -9,13 +9,13 @@ import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestUri02Composing extends JunitTracer {
+public class TestUri02Composing extends SingletonTestCase {
 
     @BeforeClass
     public static void assetRegistration() throws Exception {
diff --git a/src/junit/com/jogamp/common/net/TestUri03Resolving.java b/src/junit/com/jogamp/common/net/TestUri03Resolving.java
index 54e2976..f7fe842 100644
--- a/src/junit/com/jogamp/common/net/TestUri03Resolving.java
+++ b/src/junit/com/jogamp/common/net/TestUri03Resolving.java
@@ -14,13 +14,13 @@ import org.junit.Test;
 
 import com.jogamp.common.net.Uri;
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestUri03Resolving extends JunitTracer {
+public class TestUri03Resolving extends SingletonTestCase {
 
     // Bug 908, issues w/ windows file path char: $ ^ ~ # [ ]
 
diff --git a/src/junit/com/jogamp/common/net/TestUri99LaunchOnReservedCharPathBug908.java b/src/junit/com/jogamp/common/net/TestUri99LaunchOnReservedCharPathBug908.java
index 09748a1..78ecb93 100644
--- a/src/junit/com/jogamp/common/net/TestUri99LaunchOnReservedCharPathBug908.java
+++ b/src/junit/com/jogamp/common/net/TestUri99LaunchOnReservedCharPathBug908.java
@@ -44,7 +44,7 @@ import com.jogamp.common.os.AndroidVersion;
 import com.jogamp.common.os.Platform;
 import com.jogamp.common.util.JarUtil;
 import com.jogamp.common.util.ReflectionUtil;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 import com.jogamp.junit.util.MiscUtils;
 
 /**
@@ -70,7 +70,7 @@ import com.jogamp.junit.util.MiscUtils;
  * </p>
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestUri99LaunchOnReservedCharPathBug908 extends JunitTracer {
+public class TestUri99LaunchOnReservedCharPathBug908 extends SingletonTestCase {
     static class TestClassLoader extends URLClassLoader {
         public TestClassLoader(final URL[] urls) {
             super(urls);
diff --git a/src/junit/com/jogamp/common/net/TestUriQueryProps.java b/src/junit/com/jogamp/common/net/TestUriQueryProps.java
index 471cae2..847c6e3 100644
--- a/src/junit/com/jogamp/common/net/TestUriQueryProps.java
+++ b/src/junit/com/jogamp/common/net/TestUriQueryProps.java
@@ -8,13 +8,13 @@ import java.net.URISyntaxException;
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestUriQueryProps extends JunitTracer {
+public class TestUriQueryProps extends SingletonTestCase {
 
     @Test
     public void test() throws IOException, URISyntaxException {
diff --git a/src/junit/com/jogamp/common/net/TestUrisWithAssetHandler.java b/src/junit/com/jogamp/common/net/TestUrisWithAssetHandler.java
index d2bfaf7..55b81a3 100644
--- a/src/junit/com/jogamp/common/net/TestUrisWithAssetHandler.java
+++ b/src/junit/com/jogamp/common/net/TestUrisWithAssetHandler.java
@@ -11,10 +11,10 @@ import org.junit.FixMethodOrder;
 import org.junit.Test;
 import org.junit.runners.MethodSorters;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestUrisWithAssetHandler extends JunitTracer {
+public class TestUrisWithAssetHandler extends SingletonTestCase {
 
     @BeforeClass
     public static void assetRegistration() throws Exception {
diff --git a/src/junit/com/jogamp/common/nio/BuffersTest.java b/src/junit/com/jogamp/common/nio/BuffersTest.java
index 68bd71f..c6a98c4 100644
--- a/src/junit/com/jogamp/common/nio/BuffersTest.java
+++ b/src/junit/com/jogamp/common/nio/BuffersTest.java
@@ -34,7 +34,7 @@ package com.jogamp.common.nio;
 import java.nio.IntBuffer;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import static org.junit.Assert.*;
 
@@ -45,7 +45,7 @@ import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class BuffersTest extends JunitTracer {
+public class BuffersTest extends SingletonTestCase {
 
     @Test
     public void slice() {
diff --git a/src/junit/com/jogamp/common/nio/CachedBufferFactoryTest.java b/src/junit/com/jogamp/common/nio/CachedBufferFactoryTest.java
index b0f3cfb..0bdac52 100644
--- a/src/junit/com/jogamp/common/nio/CachedBufferFactoryTest.java
+++ b/src/junit/com/jogamp/common/nio/CachedBufferFactoryTest.java
@@ -42,7 +42,7 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import static java.lang.System.*;
 import static org.junit.Assert.*;
@@ -55,7 +55,7 @@ import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class CachedBufferFactoryTest extends JunitTracer {
+public class CachedBufferFactoryTest extends SingletonTestCase {
 
     private final int BUFFERCOUNT = 120;
 
diff --git a/src/junit/com/jogamp/common/nio/TestBuffersFloatDoubleConversion.java b/src/junit/com/jogamp/common/nio/TestBuffersFloatDoubleConversion.java
index 61bbafa..3fdaa13 100644
--- a/src/junit/com/jogamp/common/nio/TestBuffersFloatDoubleConversion.java
+++ b/src/junit/com/jogamp/common/nio/TestBuffersFloatDoubleConversion.java
@@ -33,13 +33,13 @@ import org.junit.Assert;
 
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestBuffersFloatDoubleConversion extends JunitTracer {
+public class TestBuffersFloatDoubleConversion extends SingletonTestCase {
 
     public static boolean cmpFloatArray(final float[] d1, final int d1_offset, final float[] d2, final int d2_offset, final int len) {
         if( d1.length - d1_offset < len) {
diff --git a/src/junit/com/jogamp/common/nio/TestByteBufferCopyStream.java b/src/junit/com/jogamp/common/nio/TestByteBufferCopyStream.java
index fff2c6f..926ea49 100644
--- a/src/junit/com/jogamp/common/nio/TestByteBufferCopyStream.java
+++ b/src/junit/com/jogamp/common/nio/TestByteBufferCopyStream.java
@@ -35,7 +35,7 @@ import java.nio.channels.FileChannel;
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
@@ -45,7 +45,7 @@ import org.junit.runners.MethodSorters;
  * direct stream to stream copy via mapped buffers.
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestByteBufferCopyStream extends JunitTracer {
+public class TestByteBufferCopyStream extends SingletonTestCase {
 
     static void testImpl(final String srcFileName, final long size,
                          final MappedByteBufferInputStream.CacheMode srcCacheMode, final int srcSliceShift,
diff --git a/src/junit/com/jogamp/common/nio/TestByteBufferInputStream.java b/src/junit/com/jogamp/common/nio/TestByteBufferInputStream.java
index 408b417..39b463c 100644
--- a/src/junit/com/jogamp/common/nio/TestByteBufferInputStream.java
+++ b/src/junit/com/jogamp/common/nio/TestByteBufferInputStream.java
@@ -42,7 +42,7 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 
 import com.jogamp.common.util.IOUtil;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
@@ -56,7 +56,7 @@ import org.junit.runners.MethodSorters;
  * </p>
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestByteBufferInputStream extends JunitTracer {
+public class TestByteBufferInputStream extends SingletonTestCase {
     /** {@value} */
     static final int buffer__8KiB = 1 << 13;
 
diff --git a/src/junit/com/jogamp/common/nio/TestByteBufferOutputStream.java b/src/junit/com/jogamp/common/nio/TestByteBufferOutputStream.java
index f57101e..8dfc91f 100644
--- a/src/junit/com/jogamp/common/nio/TestByteBufferOutputStream.java
+++ b/src/junit/com/jogamp/common/nio/TestByteBufferOutputStream.java
@@ -35,7 +35,7 @@ import java.nio.channels.FileChannel;
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
@@ -44,7 +44,7 @@ import org.junit.runners.MethodSorters;
  * Testing {@link MappedByteBufferInputStream} and {@link MappedByteBufferOutputStream} editing functionality.
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestByteBufferOutputStream extends JunitTracer {
+public class TestByteBufferOutputStream extends SingletonTestCase {
 
     static void testImpl(final String fname,
                          final byte[] payLoad, final long payLoadOffset, final long postPayLoadFiller,
diff --git a/src/junit/com/jogamp/common/nio/TestPointerBufferEndian.java b/src/junit/com/jogamp/common/nio/TestPointerBufferEndian.java
index 49a470f..9c9f3ae 100644
--- a/src/junit/com/jogamp/common/nio/TestPointerBufferEndian.java
+++ b/src/junit/com/jogamp/common/nio/TestPointerBufferEndian.java
@@ -6,7 +6,7 @@ import java.io.IOException;
 import jogamp.common.os.PlatformPropsImpl;
 
 import com.jogamp.common.os.*;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.Assert;
 import org.junit.Test;
@@ -17,7 +17,7 @@ import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestPointerBufferEndian extends JunitTracer {
+public class TestPointerBufferEndian extends SingletonTestCase {
 
     protected void testImpl (final boolean direct) {
         final MachineDescription machine = Platform.getMachineDescription();
diff --git a/src/junit/com/jogamp/common/nio/TestStructAccessorEndian.java b/src/junit/com/jogamp/common/nio/TestStructAccessorEndian.java
index 967122e..951fc5a 100644
--- a/src/junit/com/jogamp/common/nio/TestStructAccessorEndian.java
+++ b/src/junit/com/jogamp/common/nio/TestStructAccessorEndian.java
@@ -12,13 +12,13 @@ import org.junit.Test;
 
 import com.jogamp.common.os.MachineDescription;
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestStructAccessorEndian extends JunitTracer {
+public class TestStructAccessorEndian extends SingletonTestCase {
 
     @Test
     public void testStructAccessorEndian1 () {
diff --git a/src/junit/com/jogamp/common/os/TestElfReader01.java b/src/junit/com/jogamp/common/os/TestElfReader01.java
index bc6aef1..c7324aa 100644
--- a/src/junit/com/jogamp/common/os/TestElfReader01.java
+++ b/src/junit/com/jogamp/common/os/TestElfReader01.java
@@ -16,13 +16,13 @@ import jogamp.common.os.elf.SectionHeader;
 import org.junit.Test;
 
 import com.jogamp.common.os.Platform.OSType;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestElfReader01 extends JunitTracer {
+public class TestElfReader01 extends SingletonTestCase {
     public static String GNU_LINUX_SELF_EXE = "/proc/self/exe";
     public static String ARM_HF_EXE = "tst-exe-armhf";
     public static String ARM_SF_EXE = "tst-exe-arm";
diff --git a/src/junit/com/jogamp/common/util/IntIntHashMapTest.java b/src/junit/com/jogamp/common/util/IntIntHashMapTest.java
index 75524ac..2de0c38 100644
--- a/src/junit/com/jogamp/common/util/IntIntHashMapTest.java
+++ b/src/junit/com/jogamp/common/util/IntIntHashMapTest.java
@@ -40,7 +40,7 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import static org.junit.Assert.*;
 import static java.lang.System.*;
@@ -54,7 +54,7 @@ import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class IntIntHashMapTest extends JunitTracer {
+public class IntIntHashMapTest extends SingletonTestCase {
 
     private static int iterations;
     private static IntIntUniqueRndValues pairs;
diff --git a/src/junit/com/jogamp/common/util/IntObjectHashMapTest.java b/src/junit/com/jogamp/common/util/IntObjectHashMapTest.java
index 3207683..9e5618b 100644
--- a/src/junit/com/jogamp/common/util/IntObjectHashMapTest.java
+++ b/src/junit/com/jogamp/common/util/IntObjectHashMapTest.java
@@ -40,7 +40,7 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import static org.junit.Assert.*;
 
@@ -53,7 +53,7 @@ import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class IntObjectHashMapTest extends JunitTracer {
+public class IntObjectHashMapTest extends SingletonTestCase {
 
     private static int iterations;
     private static IntIntObjUniqueRndValues pairs;
diff --git a/src/junit/com/jogamp/common/util/LongIntHashMapTest.java b/src/junit/com/jogamp/common/util/LongIntHashMapTest.java
index 90e54b9..9f868ba 100644
--- a/src/junit/com/jogamp/common/util/LongIntHashMapTest.java
+++ b/src/junit/com/jogamp/common/util/LongIntHashMapTest.java
@@ -40,7 +40,7 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import static org.junit.Assert.*;
 import static java.lang.System.*;
@@ -54,7 +54,7 @@ import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class LongIntHashMapTest extends JunitTracer {
+public class LongIntHashMapTest extends SingletonTestCase {
 
     private static int iterations;
     private static LongIntUniqueRndValues pairs;
diff --git a/src/junit/com/jogamp/common/util/TestArrayHashSet01.java b/src/junit/com/jogamp/common/util/TestArrayHashSet01.java
index 4f63fbe..f8e2c22 100644
--- a/src/junit/com/jogamp/common/util/TestArrayHashSet01.java
+++ b/src/junit/com/jogamp/common/util/TestArrayHashSet01.java
@@ -34,13 +34,13 @@ import java.io.IOException;
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestArrayHashSet01 extends JunitTracer {
+public class TestArrayHashSet01 extends SingletonTestCase {
 
     public static class Dummy {
         int i1, i2, i3;
diff --git a/src/junit/com/jogamp/common/util/TestBitstream00.java b/src/junit/com/jogamp/common/util/TestBitstream00.java
index 7bf4167..02d8c78 100644
--- a/src/junit/com/jogamp/common/util/TestBitstream00.java
+++ b/src/junit/com/jogamp/common/util/TestBitstream00.java
@@ -42,7 +42,7 @@ import com.jogamp.common.os.Platform;
 
 import static com.jogamp.common.util.BitstreamData.*;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
@@ -51,7 +51,7 @@ import org.junit.runners.MethodSorters;
  * Test basic bit operations for {@link Bitstream}
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestBitstream00 extends JunitTracer {
+public class TestBitstream00 extends SingletonTestCase {
 
     @Test
     public void test00ShowByteOrder() {
diff --git a/src/junit/com/jogamp/common/util/TestBitstream01.java b/src/junit/com/jogamp/common/util/TestBitstream01.java
index f0415bc..bd8f563 100644
--- a/src/junit/com/jogamp/common/util/TestBitstream01.java
+++ b/src/junit/com/jogamp/common/util/TestBitstream01.java
@@ -34,7 +34,7 @@ import java.nio.ByteBuffer;
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 import static com.jogamp.common.util.BitstreamData.*;
 
 import org.junit.FixMethodOrder;
@@ -53,7 +53,7 @@ import org.junit.runners.MethodSorters;
  * </ul>
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestBitstream01 extends JunitTracer {
+public class TestBitstream01 extends SingletonTestCase {
 
     Bitstream<ByteBuffer> getTestStream(final boolean msbFirst, final int preBits, final int skipBits, final int postBits) throws IOException {
         final int byteCount = ( preBits + skipBits + postBits + 7 ) / 8;
diff --git a/src/junit/com/jogamp/common/util/TestBitstream02.java b/src/junit/com/jogamp/common/util/TestBitstream02.java
index e1a9eb0..e5789e7 100644
--- a/src/junit/com/jogamp/common/util/TestBitstream02.java
+++ b/src/junit/com/jogamp/common/util/TestBitstream02.java
@@ -35,7 +35,7 @@ import org.junit.Assert;
 import org.junit.Test;
 
 import com.jogamp.common.nio.Buffers;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import static com.jogamp.common.util.BitstreamData.*;
 
@@ -51,7 +51,7 @@ import org.junit.runners.MethodSorters;
  * </ul>
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestBitstream02 extends JunitTracer {
+public class TestBitstream02 extends SingletonTestCase {
 
     @Test
     public void test01Int8BitsAligned() throws IOException {
diff --git a/src/junit/com/jogamp/common/util/TestBitstream03.java b/src/junit/com/jogamp/common/util/TestBitstream03.java
index 29debc8..02555a5 100644
--- a/src/junit/com/jogamp/common/util/TestBitstream03.java
+++ b/src/junit/com/jogamp/common/util/TestBitstream03.java
@@ -36,7 +36,7 @@ import org.junit.Assert;
 import org.junit.Test;
 
 import com.jogamp.common.nio.Buffers;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import static com.jogamp.common.util.BitstreamData.*;
 
@@ -52,7 +52,7 @@ import org.junit.runners.MethodSorters;
  * </ul>
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestBitstream03 extends JunitTracer {
+public class TestBitstream03 extends SingletonTestCase {
 
     @Test
     public void test01Int16BitsAligned() throws IOException {
diff --git a/src/junit/com/jogamp/common/util/TestBitstream04.java b/src/junit/com/jogamp/common/util/TestBitstream04.java
index f61ebea..b05f0ff 100644
--- a/src/junit/com/jogamp/common/util/TestBitstream04.java
+++ b/src/junit/com/jogamp/common/util/TestBitstream04.java
@@ -36,7 +36,7 @@ import org.junit.Assert;
 import org.junit.Test;
 
 import com.jogamp.common.nio.Buffers;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import static com.jogamp.common.util.BitstreamData.*;
 
@@ -52,7 +52,7 @@ import org.junit.runners.MethodSorters;
  * </ul>
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestBitstream04 extends JunitTracer {
+public class TestBitstream04 extends SingletonTestCase {
 
     @Test
     public void test01Int32BitsAligned() throws IOException {
diff --git a/src/junit/com/jogamp/common/util/TestFloatStack01.java b/src/junit/com/jogamp/common/util/TestFloatStack01.java
index c0c1a2f..409236e 100644
--- a/src/junit/com/jogamp/common/util/TestFloatStack01.java
+++ b/src/junit/com/jogamp/common/util/TestFloatStack01.java
@@ -35,13 +35,13 @@ import java.util.Arrays;
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class /*testname*/TestFloatStack01/*testname*/ extends JunitTracer {
+public class /*testname*/TestFloatStack01/*testname*/ extends SingletonTestCase {
 
     static final boolean equals(final /*value*/float/*value*/[] b, final int bOffset,
                                 final /*value*/float/*value*/[] stack, final int stackOffset, final int length) {
diff --git a/src/junit/com/jogamp/common/util/TestIOUtil01.java b/src/junit/com/jogamp/common/util/TestIOUtil01.java
index 68f472f..bbe0d64 100644
--- a/src/junit/com/jogamp/common/util/TestIOUtil01.java
+++ b/src/junit/com/jogamp/common/util/TestIOUtil01.java
@@ -45,13 +45,13 @@ import org.junit.Test;
 
 import com.jogamp.common.os.MachineDescription;
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestIOUtil01 extends JunitTracer {
+public class TestIOUtil01 extends SingletonTestCase {
 
     static final MachineDescription machine = Platform.getMachineDescription();
     static final int tsz = machine.pageSizeInBytes() + machine.pageSizeInBytes() / 2 ;
diff --git a/src/junit/com/jogamp/common/util/TestIteratorIndexCORE.java b/src/junit/com/jogamp/common/util/TestIteratorIndexCORE.java
index 110d1cd..9ade783 100644
--- a/src/junit/com/jogamp/common/util/TestIteratorIndexCORE.java
+++ b/src/junit/com/jogamp/common/util/TestIteratorIndexCORE.java
@@ -34,13 +34,13 @@ import java.io.IOException;
 import org.junit.Test;
 
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestIteratorIndexCORE extends JunitTracer {
+public class TestIteratorIndexCORE extends SingletonTestCase {
 
     static int elems = 10;
     static int loop = ( Platform.getCPUFamily() == Platform.CPUFamily.ARM ) ? 20 : 9999999;
diff --git a/src/junit/com/jogamp/common/util/TestJarUtil.java b/src/junit/com/jogamp/common/util/TestJarUtil.java
index 06a2e43..42aa707 100644
--- a/src/junit/com/jogamp/common/util/TestJarUtil.java
+++ b/src/junit/com/jogamp/common/util/TestJarUtil.java
@@ -51,13 +51,13 @@ import com.jogamp.common.os.AndroidVersion;
 import com.jogamp.common.util.cache.TempCacheReg;
 import com.jogamp.common.util.cache.TempFileCache;
 import com.jogamp.common.util.cache.TempJarCache;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestJarUtil extends JunitTracer {
+public class TestJarUtil extends SingletonTestCase {
     static TempFileCache fileCache;
 
     @BeforeClass
diff --git a/src/junit/com/jogamp/common/util/TestPlatform01.java b/src/junit/com/jogamp/common/util/TestPlatform01.java
index ebdfe19..acdced3 100644
--- a/src/junit/com/jogamp/common/util/TestPlatform01.java
+++ b/src/junit/com/jogamp/common/util/TestPlatform01.java
@@ -33,13 +33,13 @@ import org.junit.Test;
 
 import com.jogamp.common.os.MachineDescription;
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestPlatform01 extends JunitTracer {
+public class TestPlatform01 extends SingletonTestCase {
 
     @Test
     public void testInfo00()  {
diff --git a/src/junit/com/jogamp/common/util/TestRunnableTask01.java b/src/junit/com/jogamp/common/util/TestRunnableTask01.java
index feb0468..7c2f27a 100644
--- a/src/junit/com/jogamp/common/util/TestRunnableTask01.java
+++ b/src/junit/com/jogamp/common/util/TestRunnableTask01.java
@@ -34,13 +34,13 @@ import java.lang.reflect.InvocationTargetException;
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestRunnableTask01 extends JunitTracer {
+public class TestRunnableTask01 extends SingletonTestCase {
 
     @Test
     public void testInvokeAndWait00() throws IOException, InterruptedException, InvocationTargetException {
diff --git a/src/junit/com/jogamp/common/util/TestSystemPropsAndEnvs.java b/src/junit/com/jogamp/common/util/TestSystemPropsAndEnvs.java
index a78957a..44eea42 100644
--- a/src/junit/com/jogamp/common/util/TestSystemPropsAndEnvs.java
+++ b/src/junit/com/jogamp/common/util/TestSystemPropsAndEnvs.java
@@ -35,13 +35,13 @@ import java.util.Properties;
 
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestSystemPropsAndEnvs extends JunitTracer {
+public class TestSystemPropsAndEnvs extends SingletonTestCase {
 
     @Test
     public void dumpProperties() {
diff --git a/src/junit/com/jogamp/common/util/TestTempJarCache.java b/src/junit/com/jogamp/common/util/TestTempJarCache.java
index 474a17a..20b14fb 100644
--- a/src/junit/com/jogamp/common/util/TestTempJarCache.java
+++ b/src/junit/com/jogamp/common/util/TestTempJarCache.java
@@ -51,10 +51,10 @@ import com.jogamp.common.os.Platform;
 import com.jogamp.common.util.cache.TempCacheReg;
 import com.jogamp.common.util.cache.TempFileCache;
 import com.jogamp.common.util.cache.TempJarCache;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestTempJarCache extends JunitTracer {
+public class TestTempJarCache extends SingletonTestCase {
     static TempFileCache fileCache;
 
     static class TestClassLoader extends URLClassLoader {
diff --git a/src/junit/com/jogamp/common/util/TestVersionInfo.java b/src/junit/com/jogamp/common/util/TestVersionInfo.java
index 7466d0d..f548e39 100644
--- a/src/junit/com/jogamp/common/util/TestVersionInfo.java
+++ b/src/junit/com/jogamp/common/util/TestVersionInfo.java
@@ -32,13 +32,13 @@ import java.io.IOException;
 import org.junit.Test;
 
 import com.jogamp.common.GlueGenVersion;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestVersionInfo extends JunitTracer {
+public class TestVersionInfo extends SingletonTestCase {
 
     @Test
     public void testInfo01() {
diff --git a/src/junit/com/jogamp/common/util/TestVersionNumber.java b/src/junit/com/jogamp/common/util/TestVersionNumber.java
index 2b4f6d2..2959d18 100644
--- a/src/junit/com/jogamp/common/util/TestVersionNumber.java
+++ b/src/junit/com/jogamp/common/util/TestVersionNumber.java
@@ -33,13 +33,13 @@ import java.io.IOException;
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestVersionNumber extends JunitTracer {
+public class TestVersionNumber extends SingletonTestCase {
 
     @Test
     public void test01() {
diff --git a/src/junit/com/jogamp/common/util/TestVersionSemantics.java b/src/junit/com/jogamp/common/util/TestVersionSemantics.java
index edc0dc2..8163ffb 100644
--- a/src/junit/com/jogamp/common/util/TestVersionSemantics.java
+++ b/src/junit/com/jogamp/common/util/TestVersionSemantics.java
@@ -42,7 +42,7 @@ import org.semver.Delta;
 
 import com.jogamp.common.GlueGenVersion;
 import com.jogamp.common.util.VersionNumberString;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 import com.jogamp.junit.util.VersionSemanticsUtil;
 
 /**
@@ -64,7 +64,7 @@ import com.jogamp.junit.util.VersionSemanticsUtil;
  * @throws URISyntaxException
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestVersionSemantics extends JunitTracer {
+public class TestVersionSemantics extends SingletonTestCase {
     static final String jarFile = "gluegen-rt.jar";
     static final VersionNumberString preVersionNumber = new VersionNumberString("2.2.0");
     static final Delta.CompatibilityType expectedCompatibilityType = Delta.CompatibilityType.NON_BACKWARD_COMPATIBLE;
diff --git a/src/junit/com/jogamp/common/util/locks/TestRecursiveLock01.java b/src/junit/com/jogamp/common/util/locks/TestRecursiveLock01.java
index 26677c0..09d96f2 100644
--- a/src/junit/com/jogamp/common/util/locks/TestRecursiveLock01.java
+++ b/src/junit/com/jogamp/common/util/locks/TestRecursiveLock01.java
@@ -38,13 +38,13 @@ import org.junit.Assert;
 import org.junit.Test;
 
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestRecursiveLock01 extends JunitTracer {
+public class TestRecursiveLock01 extends SingletonTestCase {
 
     public enum YieldMode {
         NONE(0), YIELD(1), SLEEP(2);
diff --git a/src/junit/com/jogamp/common/util/locks/TestRecursiveThreadGroupLock01.java b/src/junit/com/jogamp/common/util/locks/TestRecursiveThreadGroupLock01.java
index b361463..b338abe 100644
--- a/src/junit/com/jogamp/common/util/locks/TestRecursiveThreadGroupLock01.java
+++ b/src/junit/com/jogamp/common/util/locks/TestRecursiveThreadGroupLock01.java
@@ -34,13 +34,13 @@ import org.junit.Assert;
 import org.junit.Test;
 
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestRecursiveThreadGroupLock01 extends JunitTracer {
+public class TestRecursiveThreadGroupLock01 extends SingletonTestCase {
 
     public enum YieldMode {
         NONE(0), YIELD(1), SLEEP(2);
diff --git a/src/junit/com/jogamp/gluegen/test/junit/generation/BaseClass.java b/src/junit/com/jogamp/gluegen/test/junit/generation/BaseClass.java
index b90eeb0..bde32fd 100644
--- a/src/junit/com/jogamp/gluegen/test/junit/generation/BaseClass.java
+++ b/src/junit/com/jogamp/gluegen/test/junit/generation/BaseClass.java
@@ -32,7 +32,7 @@ import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.common.os.MachineDescription;
 import com.jogamp.common.os.Platform;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
@@ -50,7 +50,7 @@ import org.junit.Assert;
  * @author Michael Bien
  * @author Sven Gothel
  */
-public class BaseClass extends JunitTracer {
+public class BaseClass extends SingletonTestCase {
 
     /**
      * Verifies the existence and creation of the generated class.
diff --git a/src/junit/com/jogamp/gluegen/test/junit/generation/PCPPTest.java b/src/junit/com/jogamp/gluegen/test/junit/generation/PCPPTest.java
index f45297f..6a38b35 100644
--- a/src/junit/com/jogamp/gluegen/test/junit/generation/PCPPTest.java
+++ b/src/junit/com/jogamp/gluegen/test/junit/generation/PCPPTest.java
@@ -30,7 +30,7 @@ package com.jogamp.gluegen.test.junit.generation;
 
 import com.jogamp.common.os.AndroidVersion;
 import com.jogamp.gluegen.pcpp.PCPP;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import java.io.BufferedReader;
 import java.io.ByteArrayOutputStream;
@@ -51,7 +51,7 @@ import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class PCPPTest extends JunitTracer {
+public class PCPPTest extends SingletonTestCase {
 
     @BeforeClass
     public static void init() {
diff --git a/src/junit/com/jogamp/gluegen/test/junit/structgen/TestStructGen01.java b/src/junit/com/jogamp/gluegen/test/junit/structgen/TestStructGen01.java
index 89a9a68..68c5aa4 100644
--- a/src/junit/com/jogamp/gluegen/test/junit/structgen/TestStructGen01.java
+++ b/src/junit/com/jogamp/gluegen/test/junit/structgen/TestStructGen01.java
@@ -1,6 +1,6 @@
 package com.jogamp.gluegen.test.junit.structgen;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.Assert;
 import org.junit.BeforeClass;
@@ -9,7 +9,7 @@ import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestStructGen01 extends JunitTracer {
+public class TestStructGen01 extends SingletonTestCase {
 
     @BeforeClass
     public static void init() {
diff --git a/src/junit/com/jogamp/gluegen/test/junit/structgen/TestStructGen02.java b/src/junit/com/jogamp/gluegen/test/junit/structgen/TestStructGen02.java
index cf0fadc..e7ec20c 100644
--- a/src/junit/com/jogamp/gluegen/test/junit/structgen/TestStructGen02.java
+++ b/src/junit/com/jogamp/gluegen/test/junit/structgen/TestStructGen02.java
@@ -1,6 +1,6 @@
 package com.jogamp.gluegen.test.junit.structgen;
 
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.Assert;
 import org.junit.BeforeClass;
@@ -9,7 +9,7 @@ import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestStructGen02 extends JunitTracer {
+public class TestStructGen02 extends SingletonTestCase {
 
     @BeforeClass
     public static void init() {
diff --git a/src/junit/com/jogamp/junit/sec/TestSecIOUtil01.java b/src/junit/com/jogamp/junit/sec/TestSecIOUtil01.java
index a36b50b..7c4018d 100644
--- a/src/junit/com/jogamp/junit/sec/TestSecIOUtil01.java
+++ b/src/junit/com/jogamp/junit/sec/TestSecIOUtil01.java
@@ -41,13 +41,13 @@ import com.jogamp.common.net.Uri;
 import com.jogamp.common.os.NativeLibrary;
 import com.jogamp.common.os.Platform;
 import com.jogamp.common.util.IOUtil;
-import com.jogamp.junit.util.JunitTracer;
+import com.jogamp.junit.util.SingletonTestCase;
 
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class TestSecIOUtil01 extends JunitTracer {
+public class TestSecIOUtil01 extends SingletonTestCase {
     static final String java_io_tmpdir_propkey = "java.io.tmpdir";
     static final String java_home_propkey = "java.home";
     static final String os_name_propkey = "os.name";
diff --git a/src/junit/com/jogamp/junit/util/JunitTracer.java b/src/junit/com/jogamp/junit/util/JunitTracer.java
index 0575532..f6cb953 100644
--- a/src/junit/com/jogamp/junit/util/JunitTracer.java
+++ b/src/junit/com/jogamp/junit/util/JunitTracer.java
@@ -28,6 +28,10 @@
 
 package com.jogamp.junit.util;
 
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
 import org.junit.Assume;
 import org.junit.Before;
 import org.junit.BeforeClass;
@@ -41,11 +45,15 @@ import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
 public abstract class JunitTracer {
-    @Rule public TestName _unitTestName = new TestName();
+    @Rule public final TestName _unitTestName = new TestName();
 
     static volatile boolean testSupported = true;
 
-    public static void setTestSupported(final boolean v) {
+    public static final boolean isTestSupported() {
+        return testSupported;
+    }
+
+    public static final void setTestSupported(final boolean v) {
         System.err.println("setTestSupported: "+v);
         testSupported = v;
     }
@@ -63,18 +71,18 @@ public abstract class JunitTracer {
     }
 
     @BeforeClass
-    public static void oneTimeSetUp() {
+    public static final void oneTimeSetUpBase() {
         // one-time initialization code
     }
 
     @AfterClass
-    public static void oneTimeTearDown() {
+    public static final void oneTimeTearDownBase() {
         // one-time cleanup code
         System.gc(); // force cleanup
     }
 
     @Before
-    public void setUp() {
+    public final void setUpBase() {
         System.err.print("++++ TestCase.setUp: "+getFullTestName(" - "));
         if(!testSupported) {
             System.err.println(" - "+unsupportedTestMsg);
@@ -84,10 +92,18 @@ public abstract class JunitTracer {
     }
 
     @After
-    public void tearDown() {
+    public final void tearDownBase() {
         System.err.println("++++ TestCase.tearDown: "+getFullTestName(" - "));
     }
 
     static final String unsupportedTestMsg = "Test not supported on this platform.";
+
+    public static final void waitForKey(final String preMessage) {
+        final BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
+        System.err.println(preMessage+"> Press enter to continue");
+        try {
+            System.err.println(stdin.readLine());
+        } catch (final IOException e) { e.printStackTrace(); }
+    }
 }
 
diff --git a/src/junit/com/jogamp/junit/util/SingletonTestCase.java b/src/junit/com/jogamp/junit/util/SingletonTestCase.java
new file mode 100644
index 0000000..69cb31f
--- /dev/null
+++ b/src/junit/com/jogamp/junit/util/SingletonTestCase.java
@@ -0,0 +1,71 @@
+/**
+ * Copyright 2010 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``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 JogAmp Community 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.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package com.jogamp.junit.util;
+
+import com.jogamp.common.util.locks.SingletonInstance;
+
+import org.junit.BeforeClass;
+import org.junit.AfterClass;
+import org.junit.FixMethodOrder;
+import org.junit.runners.MethodSorters;
+
+@FixMethodOrder(MethodSorters.NAME_ASCENDING)
+public abstract class SingletonTestCase extends JunitTracer {
+    public static final String SINGLE_INSTANCE_LOCK_FILE = "SingletonTestCase.lock";
+    public static final int SINGLE_INSTANCE_LOCK_PORT = 59999;
+
+    public static final long SINGLE_INSTANCE_LOCK_TO   = 6*60*1000; // wait up to 6 mins
+    public static final long SINGLE_INSTANCE_LOCK_POLL =      1000; // poll every 1s
+
+    private static volatile SingletonInstance singletonInstance;
+
+    private static final synchronized void initSingletonInstance() {
+        if( null == singletonInstance )  {
+            // singletonInstance = SingletonInstance.createFileLock(SINGLE_INSTANCE_LOCK_POLL, SINGLE_INSTANCE_LOCK_FILE);
+            singletonInstance = SingletonInstance.createServerSocket(SINGLE_INSTANCE_LOCK_POLL, SINGLE_INSTANCE_LOCK_PORT);
+            if(!singletonInstance.tryLock(SINGLE_INSTANCE_LOCK_TO)) {
+                throw new RuntimeException("Fatal: Could not lock single instance: "+singletonInstance.getName());
+            }
+        }
+    }
+
+    @BeforeClass
+    public static final void oneTimeSetUpSingleton() {
+        // one-time initialization code
+        initSingletonInstance();
+    }
+
+    @AfterClass
+    public static final void oneTimeTearDownSingleton() {
+        // one-time cleanup code
+        System.gc(); // force cleanup
+        singletonInstance.unlock();
+    }
+}
+