1 files changed, 77 insertions, 0 deletions
diff --git a/core/src/test/java/org/spongycastle/crypto/test/NullTest.java b/core/src/test/java/org/spongycastle/crypto/test/NullTest.java
new file mode 100644
index 00000000..f384cfc4
--- /dev/null
+++ b/core/src/test/java/org/spongycastle/crypto/test/NullTest.java
@@ -0,0 +1,77 @@
+package org.spongycastle.crypto.test;
+
+import org.spongycastle.crypto.BlockCipher;
+import org.spongycastle.crypto.DataLengthException;
+import org.spongycastle.crypto.engines.NullEngine;
+import org.spongycastle.crypto.params.KeyParameter;
+import org.spongycastle.util.encoders.Hex;
+import org.spongycastle.util.test.SimpleTest;
+
+public class NullTest 
+    extends CipherTest
+{
+    static SimpleTest[]  tests = 
+    {
+        new BlockCipherVectorTest(0, new NullEngine(),
+                new KeyParameter(Hex.decode("00")), "00", "00")
+    };
+    
+    NullTest()
+    {
+        super(tests, new NullEngine(), new KeyParameter(new byte[2]));
+    }
+
+    public String getName()
+    {
+        return "Null";
+    }
+
+    public void performTest()
+        throws Exception
+    {
+        super.performTest();
+        
+        BlockCipher engine = new NullEngine();
+        
+        engine.init(true, null);
+        
+        byte[] buf = new byte[1];
+        
+        engine.processBlock(buf, 0, buf, 0);
+        
+        if (buf[0] != 0)
+        {
+            fail("NullCipher changed data!");
+        }
+        
+        byte[] shortBuf = new byte[0];
+        
+        try
+        {   
+            engine.processBlock(shortBuf, 0, buf, 0);
+            
+            fail("failed short input check");
+        }
+        catch (DataLengthException e)
+        {
+            // expected 
+        }
+        
+        try
+        {   
+            engine.processBlock(buf, 0, shortBuf, 0);
+            
+            fail("failed short output check");
+        }
+        catch (DataLengthException e)
+        {
+            // expected 
+        }
+    }
+    
+    public static void main(
+        String[]    args)
+    {
+        runTest(new NullTest());
+    }
+}