Really committing known exceptions test

Lost a workflow argument with git, so I'm making another commit to
actually add the file that I intended to add last commit.

Author: jeremiahjstacey

src/test/java/org/owasp/esapi/codecs/percent/PercentCodecKnownIssuesTest.java

@@ -0,0 +1,41 @@
+package org.owasp.esapi.codecs.percent;
+import static org.owasp.esapi.codecs.percent.PercentCodecStringTest.PERCENT_CODEC_IMMUNE;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.owasp.esapi.codecs.PercentCodec;
+/**
+ * This test class holds the proof of known deficiencies, inconsistencies, or bugs with the PercentCodec implementation.
+ * <br/>
+ * The intent is that when that functionality is corrected, these tests should break. That should hopefully encourage
+ * the author to move the test to an appropriate Test file and update the functionality to a working expectation.
+ */
+public class PercentCodecKnownIssuesTest {
+    
+    private PercentCodec codec = new PercentCodec();
+
+    /**
+     * PercentCodec has not been fully implemented for codepoint support, which handles UTF16 characters (based on my current understanding).
+     * As such, the encoding/decoding of UTF16 will not function as desired through the codec implementation.
+     * <br/>
+     * When the functionality is corrected this test will break. At that point UTF16 tests should be added to {@link PercentCodecStringTest} and {@link PercentCodecCharacterTest}.
+     */
+    @Test
+    public void failsUTF16Conversions() {
+        //This should be 195
+        int incorrectDecodeExpect = 196;
+        
+        char[] encodeImmune = PERCENT_CODEC_IMMUNE;
+        String decodedValue = ""+(char) 0x100;
+        String input = "%C4%80";
+
+        String actualDecodeChar = codec.decode(input);
+        int actualChar = (int)actualDecodeChar.charAt(0);
+        
+        Assert.assertEquals(incorrectDecodeExpect, actualChar);
+        
+        //This works as expected.
+        Assert.assertEquals(input, codec.encode(encodeImmune, decodedValue));
+    }
+    
+}