Minor enhancements to the Decoder API + tests.

common/common-io/src/main/java/com/twelvemonkeys/io/enc/DecodeException.java

@@ -31,7 +31,7 @@ package com.twelvemonkeys.io.enc;
 import java.io.IOException;
 
 /**
- * Thrown by {@code Decoder}s when encoded data can not be decocded.
+ * Thrown by {@code Decoder}s when encoded data can not be decoded.
  * <p/>
  *
  * @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>

common/common-io/src/main/java/com/twelvemonkeys/io/enc/Decoder.java

@@ -53,7 +53,7 @@ public interface Decoder {
      * @param pStream the input stream to decode data from
      * @param pBuffer buffer to store the read data
      *
-     * @return the total number of bytes read into the buffer, or {@code -1}
+     * @return the total number of bytes read into the buffer, or {@code 0}
      * if there is no more data because the end of the stream has been reached.
      *
      * @throws DecodeException if encoded data is corrupt

common/common-io/src/main/java/com/twelvemonkeys/io/enc/DecoderStream.java

@@ -143,7 +143,7 @@ public final class DecoderStream extends FilterInputStream {
             // Update offset (rest)
             off += dstLen;
 
-            // Inrease count
+            // Increase count
             count += dstLen;
         }
 

common/common-io/src/test/java/com/twelvemonkeys/io/enc/DecoderAbstractTestCase.java

@@ -77,6 +77,10 @@ public abstract class DecoderAbstractTestCase extends ObjectAbstractTestCase {
 
     @Test
     public final void testStreams() throws Exception {
+        if (createCompatibleEncoder() == null) {
+            return;
+        }
+
         for (int i = 1; i < 100; i++) {
             try {
                 runStreamTest(i);