Add unit test for Compressor which reproduces buffer extent bug

1 files changed, 25 insertions, 0 deletions

diff --git a/vespajlib/src/test/java/com/yahoo/compress/LZ4CompressorTest.java b/vespajlib/src/test/java/com/yahoo/compress/LZ4CompressorTest.java
new file mode 100644
index 00000000000..c33dabf04da
--- /dev/null
+++ b/vespajlib/src/test/java/com/yahoo/compress/LZ4CompressorTest.java
@@ -0,0 +1,25 @@
+// Copyright 2017 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.compress;
+
+import org.junit.Test;
+
+import java.util.Arrays;
+import java.util.Optional;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class LZ4CompressorTest {
+
+    @Test
+    public void can_compress_and_decompress_partial_buffer_range() {
+        byte[] toCompress = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa".getBytes();
+        int compressBytes = 30;
+        Compressor compressor = new Compressor();
+        Compressor.Compression compressed = compressor.compress(CompressionType.LZ4, toCompress, Optional.of(compressBytes));
+        assertEquals(compressBytes, compressed.uncompressedSize());
+        byte[] decompressed = compressor.decompress(compressed);
+        assertTrue(Arrays.equals(decompressed, Arrays.copyOf(toCompress, compressBytes)));
+    }
+
+}