1 files changed, 61 insertions, 0 deletions
diff --git a/vespajlib/src/test/java/com/yahoo/io/SlowInflateTestCase.java b/vespajlib/src/test/java/com/yahoo/io/SlowInflateTestCase.java
new file mode 100644
index 00000000000..48d8e8cdffe
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+++ b/vespajlib/src/test/java/com/yahoo/io/SlowInflateTestCase.java
@@ -0,0 +1,61 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.io;
+
+import static org.junit.Assert.*;
+
+import java.util.Arrays;
+import java.util.zip.Deflater;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import com.yahoo.text.Utf8;
+
+/**
+ * Check decompressor used among other things for packed summary fields.
+ *
+ * @author <a href="mailto:steinar@yahoo-inc.com">Steinar Knutsen</a>
+ */
+public class SlowInflateTestCase {
+
+    private String value;
+    private byte[] raw;
+    private byte[] output;
+    private byte[] compressed;
+    private int compressedDataLength;
+
+    @Before
+    public void setUp() throws Exception {
+        value = "000000000000000000000000000000000000000000000000000000000000000";
+        raw = Utf8.toBytesStd(value);
+        output = new byte[raw.length * 2];
+        Deflater compresser = new Deflater();
+        compresser.setInput(raw);
+        compresser.finish();
+        compressedDataLength = compresser.deflate(output);
+        compresser.end();
+        compressed = Arrays.copyOf(output, compressedDataLength);
+    }
+
+    @Test
+    public final void test() {
+        byte[] unpacked = new SlowInflate().unpack(compressed, raw.length);
+        assertArrayEquals(raw, unpacked);
+    }
+
+    @Test
+    public final void testCorruptData() {
+        compressed[0] = (byte) (compressed[0] ^ compressed[1]);
+        compressed[1] = (byte) (compressed[1] ^ compressed[2]);
+        compressed[2] = (byte) (compressed[2] ^ compressed[3]);
+        compressed[3] = (byte) (compressed[3] ^ compressed[4]);
+        boolean caught = false;
+        try {
+            new SlowInflate().unpack(compressed, raw.length);
+        } catch (RuntimeException e) {
+            caught = true;
+        }
+        assertTrue(caught);
+    }
+
+}