add sample data

src/test/java/org/xerial/snappy/SnappyOutputStreamTest.java

@@ -0,0 +1,78 @@
+/*--------------------------------------------------------------------------
+ *  Copyright 2011 Taro L. Saito
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *--------------------------------------------------------------------------*/
+//--------------------------------------
+// XerialJ
+//
+// SnappyOutputStreamTest.java
+// Since: 2011/03/31 18:26:31
+//
+// $URL$
+// $Author$
+//--------------------------------------
+package org.xerial.snappy;
+
+import static org.junit.Assert.*;
+
+import java.io.BufferedInputStream;
+import java.io.ByteArrayOutputStream;
+
+import org.junit.Test;
+import org.xerial.util.FileResource;
+import org.xerial.util.log.Logger;
+
+public class SnappyOutputStreamTest
+{
+    private static Logger _logger = Logger.getLogger(SnappyOutputStreamTest.class);
+
+    @Test
+    public void test() throws Exception {
+        ByteArrayOutputStream buf = new ByteArrayOutputStream();
+        SnappyOutputStream sout = new SnappyOutputStream(buf);
+
+        BufferedInputStream input = FileResource.openByteStream(SnappyOutputStreamTest.class, "alice29.txt");
+        assertNotNull(input);
+
+        ByteArrayOutputStream orig = new ByteArrayOutputStream();
+        byte[] tmp = new byte[1024];
+        for (int readBytes = 0; (readBytes = input.read(tmp)) != -1;) {
+            sout.write(tmp, 0, readBytes);
+            orig.write(tmp, 0, readBytes); // preserve the original data
+        }
+        input.close();
+        sout.flush();
+        orig.flush();
+
+        int compressedSize = buf.size();
+        _logger.debug("compressed size: " + compressedSize);
+
+        ByteArrayOutputStream decompressed = new ByteArrayOutputStream();
+        byte[] compressed = buf.toByteArray();
+        // decompress
+        for (int cursor = 0; cursor < compressed.length;) {
+            int chunkSize = SnappyOutputStream.readInt(compressed, cursor);
+            cursor += 4;
+            byte[] tmpOut = new byte[Snappy.uncompressedLength(compressed, cursor, chunkSize)];
+            int decompressedSize = Snappy.uncompress(compressed, cursor, chunkSize, tmpOut, 0);
+            cursor += chunkSize;
+
+            decompressed.write(tmpOut);
+        }
+        decompressed.flush();
+        assertEquals(orig.size(), decompressed.size());
+        assertArrayEquals(orig.toByteArray(), decompressed.toByteArray());
+    }
+
+}