geoffreyblake commented on a change in pull request #99:
URL: https://github.com/apache/commons-crypto/pull/99#discussion_r416643423



##########
File path: 
src/test/java/org/apache/commons/crypto/stream/AbstractCipherStreamTest.java
##########
@@ -197,46 +224,236 @@ protected void doByteBufferRead(final String 
cipherClass, final boolean withChan
                 getCipher(cipherClass), smallBufferSize, iv, withChannel);
         buf.clear();
         byteBufferReadCheck(in, buf, 11);
+        in.close();      
+        
+        // Direct buffer, default buffer size, initial buffer position is 0, 
final read
+        in = getCryptoInputStream(new ByteArrayInputStream(encData),
+                getCipher(cipherClass), smallBufferSize, iv, withChannel);
+        buf.clear();
+        byteBufferFinalReadCheck(in, buf, 0);
+        in.close();
+        
+        // Default buffer size, initial buffer position is 0, insufficient 
dest buffer length
+        in = getCryptoInputStream(new ByteArrayInputStream(encData),
+                getCipher(cipherClass), defaultBufferSize, iv, withChannel);
+        buf = ByteBuffer.allocate(100);
+        byteBufferReadCheck(in, buf, 0);
+        in.close();
+        
+        // Default buffer size, initial buffer position is 0
+        in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), key, 
+                new IvParameterSpec(iv), withChannel);
+        buf = ByteBuffer.allocate(dataLen + 100);
+        byteBufferReadCheck(in, buf, 0);
+        in.close();
+        
+        // Default buffer size, initial buffer position is not 0
+        in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), key, 
+                new IvParameterSpec(iv), withChannel);
+        buf.clear();
+        byteBufferReadCheck(in, buf, 11);
+        in.close();
+
+        // Small buffer size, initial buffer position is 0
+        in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), key, 
+                new IvParameterSpec(iv), withChannel);
+        buf.clear();
+        byteBufferReadCheck(in, buf, 0);
+        in.close();
+
+        // Small buffer size, initial buffer position is not 0
+        in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), key, 
+                new IvParameterSpec(iv), withChannel);
+        buf.clear();
+        byteBufferReadCheck(in, buf, 11);
+        in.close();
+
+        // Direct buffer, default buffer size, initial buffer position is 0
+        in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), key, 
+                new IvParameterSpec(iv), withChannel);
+        buf = ByteBuffer.allocateDirect(dataLen + 100);
+        byteBufferReadCheck(in, buf, 0);
+        in.close();
+
+        // Direct buffer, default buffer size, initial buffer position is not 0
+        in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), key, 
+                new IvParameterSpec(iv), withChannel);
+        buf.clear();
+        byteBufferReadCheck(in, buf, 11);
+        in.close();
+
+        // Direct buffer, small buffer size, initial buffer position is 0
+        in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), key, 
+                new IvParameterSpec(iv), withChannel);
+        buf.clear();
+        byteBufferReadCheck(in, buf, 0);
+        in.close();
+
+        // Direct buffer, small buffer size, initial buffer position is not 0
+        in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), key, 
+                new IvParameterSpec(iv), withChannel);
+        buf.clear();
+        byteBufferReadCheck(in, buf, 11);
+        in.close();
+        
+        // Direct buffer, default buffer size, initial buffer position is 0, 
final read
+        in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), key, 
+                new IvParameterSpec(iv), withChannel);
+        buf.clear();
+        byteBufferFinalReadCheck(in, buf, 0);
+        in.close();
+        
+        // Default buffer size, initial buffer position is 0, insufficient 
dest buffer length
+        in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), key, 
+                new IvParameterSpec(iv), withChannel);
+        buf = ByteBuffer.allocate(100);
+        byteBufferReadCheck(in, buf, 0);
         in.close();
     }
 
     protected void doByteBufferWrite(final String cipherClass,
-            final ByteArrayOutputStream baos, final boolean withChannel) 
throws Exception {
+            final ByteArrayOutputStream baos, final boolean withChannel) 
+                throws Exception {
         if (AbstractCipherTest.OPENSSL_CIPHER_CLASSNAME.equals(cipherClass)) {
             if (!Crypto.isNativeCodeLoaded()) {
                 return; // Skip this test if no JNI
             }
         }
         baos.reset();
-        final CryptoOutputStream out = getCryptoOutputStream(baos,
+        CryptoOutputStream out = getCryptoOutputStream(baos,
                 getCipher(cipherClass), defaultBufferSize, iv, withChannel);
-        ByteBuffer buf = ByteBuffer.allocateDirect(dataLen / 2);
-        buf.put(data, 0, dataLen / 2);
-        buf.flip();
-        final int n1 = out.write(buf);
-
-        buf.clear();
-        buf.put(data, n1, dataLen / 3);
-        buf.flip();
-        final int n2 = out.write(buf);
-
-        buf.clear();
-        buf.put(data, n1 + n2, dataLen - n1 - n2);
-        buf.flip();
-        final int n3 = out.write(buf);
+        doByteBufferWrite(out, withChannel);
+        
+        baos.reset();
+        CryptoCipher cipher = getCipher(cipherClass);
+        String transformation = cipher.getAlgorithm();
+        out = getCryptoOutputStream(transformation, props, baos, key, 
+                new IvParameterSpec(iv), withChannel);
+        doByteBufferWrite(out, withChannel);
+        out.write(1);
+        Assert.assertTrue(out.isOpen()); 
+        
+        out = getCryptoOutputStream(transformation, props, baos, key, 
+                new IvParameterSpec(iv), withChannel);
+        out.close();
+        Assert.assertTrue(!out.isOpen());
+    }
 
-        Assert.assertEquals(dataLen, n1 + n2 + n3);
+    protected void doExceptionTest(final String cipherClass, 
ByteArrayOutputStream baos,
+            final boolean withChannel) throws IOException {
+        if (AbstractCipherTest.OPENSSL_CIPHER_CLASSNAME.equals(cipherClass)) {
+            if (!Crypto.isNativeCodeLoaded()) {
+                return; // Skip this test if no JNI
+            }
+        }
+        
+        InputStream in = null;
+        OutputStream out = null;
+        try { // Test InvalidAlgorithmParameters
+               in = getCryptoInputStream(transformation, props, new 
ByteArrayInputStream(encData), 
+                    new SecretKeySpec(key, "AES"), new GCMParameterSpec(0, new 
byte[0]), 
+                    withChannel);
+            Assert.fail("Expected IOException.");
+        } catch (IOException ex) {
+            Assert.assertEquals(ex.getMessage(),"Illegal parameters");
+        } 
+        
+        try { // Test InvalidAlgorithmParameters
+            out = getCryptoOutputStream(transformation, props, baos, 
+                    new SecretKeySpec(key, "AES"), new GCMParameterSpec(0, 
+                    new byte[0]), withChannel);
+            Assert.fail("Expected IOException.");
+        } catch (IOException ex) {
+               Assert.assertEquals(ex.getMessage(),"Illegal parameters");
+        } 
+        
+        try { // Test Invalid Key
+            in = getCryptoInputStream(transformation,props, new 
ByteArrayInputStream(encData), 
+                    new SecretKeySpec(new byte[10], "AES"), new 
IvParameterSpec(iv), withChannel);
+            Assert.fail("Expected IOException for Invalid Key");
+        } catch (IOException ex) {
+            Assert.assertNotNull(ex);
+        }
+        
+        try { // Test Invalid Key
+            out = getCryptoOutputStream(transformation, props, baos, new 
byte[10], 
+                    new IvParameterSpec(iv), withChannel);
+            Assert.fail("Expected IOException for Invalid Key");
+        } catch (IOException ex) {
+            Assert.assertNotNull(ex);
+        }
+        
+        try { // Test closed stream.
+            in = getCryptoInputStream(new ByteArrayInputStream(encData), 
+                    getCipher(cipherClass), defaultBufferSize, iv, 
withChannel);
+            in.close();
+            in.close(); // Don't throw exception.
+            in.read(); // Throw exception.

Review comment:
       I see. Then should we split this test into 2 try blocks?  If someone 
removes that path you're testing with the 2nd close, the test will still pass 
because you'd catch an IOException from the 2nd close failing instead of from 
the read() call.
   
   To be honest, I'd expect a double close() to throw and exception, but 
obviously not in this case.

##########
File path: 
src/test/java/org/apache/commons/crypto/stream/CtrCryptoStreamTest.java
##########
@@ -52,4 +75,115 @@ protected CtrCryptoOutputStream getCryptoOutputStream(
         }
         return new CtrCryptoOutputStream(baos, cipher, bufferSize, key, iv);
     }
+    
+    @Override
+    protected CtrCryptoOutputStream getCryptoOutputStream(final String 
transformation,
+            final Properties props, final ByteArrayOutputStream baos, final 
byte[] key, 
+            final AlgorithmParameterSpec params, final boolean withChannel) 
throws IOException {
+        if (withChannel) {
+            return new CtrCryptoOutputStream(props, Channels.newChannel(baos), 
key, 
+                    ((IvParameterSpec)params).getIV());
+        }
+        return new CtrCryptoOutputStream(props, baos, 
key,((IvParameterSpec)params).getIV());
+    }
+    
+    @Override
+    protected void doFieldGetterTest(final String cipherClass, final 
ByteArrayOutputStream baos,
+            final boolean withChannel) throws Exception {
+        if (AbstractCipherTest.OPENSSL_CIPHER_CLASSNAME.equals(cipherClass)) {
+            if (!Crypto.isNativeCodeLoaded()) {
+                return; // Skip this test if no JNI
+            }
+        }
+        
+        StreamInput streamInput = new StreamInput(new 
ByteArrayInputStream(encData), 0);
+        try {
+            streamInput.seek(0);
+            Assert.fail("Expected UnsupportedOperationException.");
+        } catch (UnsupportedOperationException ex) {
+               Assert.assertEquals(ex.getMessage(), "Seek is not supported by 
this implementation");

Review comment:
       I agree it helps with readability.  My reservation is this is a brittle 
test if the generation method changes in the future, all these tests have to be 
changed.




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