fix tests

Author: lecousin

net.lecousin.core/src/main/java/net/lecousin/framework/io/PositionKnownWrapper.java

@@ -277,6 +277,7 @@ protected long skipSync(long n) throws IOException {
 	}
 
 	protected AsyncWork<Long, IOException> skipAsync(long n, RunnableWithParameter<Pair<Long, IOException>> ondone) {
+		if (n <= 0) return IOUtil.success(Long.valueOf(0), ondone);
 		return ((IO.Readable)io).skipAsync(n, (result) -> {
 			Long nb = result.getValue1();
 			if (nb != null)

net.lecousin.core/src/test/java/net/lecousin/framework/core/test/io/TestReadable.java

@@ -473,8 +473,8 @@ public void testSkipSyncNegativeValue() throws Exception {
 		}
 		skipped = io.skipSync(-2 * testBuf.length);
 		if (io instanceof IO.Readable.Seekable) {
-			if (skipped != testBuf.length + testBuf.length / 2)
-				throw new Exception("Skip beyond beginning of IO on Readable.Seekable is supposed to go to the offset 0. Skipping " + (-2 * testBuf.length) + " returned " + skipped + " but expected was " + (testBuf.length + testBuf.length / 2));
+			if (skipped != -((testBuf.length + testBuf.length / 2) - 10))
+				throw new Exception("Skip beyond beginning of IO on Readable.Seekable is supposed to go to the offset 0. Skipping " + (-2 * testBuf.length) + " returned " + skipped + " but expected was " + (-((testBuf.length + testBuf.length / 2) - 10)));
 		} else {
 			if (skipped != 0)
 				throw new Exception("Readable is not supposed to be able to skip with a negative value, skipping -10 bytes returned " + skipped + " while 0 was expected.");

net.lecousin.core/src/test/java/net/lecousin/framework/core/tests/io/buffered/TestTwoBuffersIODeterminedSizeReadable.java

@@ -27,7 +27,7 @@ public TestTwoBuffersIODeterminedSizeReadable(File testFile, byte[] testBuf, int
 	@Override
 	protected TwoBuffersIO createReadableFromFile(FileIO.ReadOnly file, long fileSize) {
 		if (fileSize <= 40000)
-			return new TwoBuffersIO.DeterminedSize(file, (int)fileSize, 0);
+			return new TwoBuffersIO.DeterminedSize(file, (int)fileSize, 10);
 		return new TwoBuffersIO.DeterminedSize(file, 40000, (int)(fileSize - 40000));
 	}
 

net.lecousin.core/src/test/java/net/lecousin/framework/core/tests/io/buffered/TestTwoBuffersIODeterminedSizeReadableBuffered.java

@@ -28,7 +28,7 @@ public TestTwoBuffersIODeterminedSizeReadableBuffered(File testFile, byte[] test
 	protected TwoBuffersIO createReadableBufferedFromFile(FileIO.ReadOnly file, long fileSize) {
 		if (fileSize <= 40000)
 			return new TwoBuffersIO.DeterminedSize(file, (int)fileSize, 0);
-		return new TwoBuffersIO.DeterminedSize(file, 40000, (int)(fileSize - 40000));
+		return new TwoBuffersIO.DeterminedSize(file, 39990, (int)(fileSize - 39990));
 	}
 
 }