Ensure incorrect skips are detected

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/io/trunk@1470354 13f79535-47bb-0310-9956-ffa450edef68

Author: sebbASF

src/test/java/org/apache/commons/io/input/CharSequenceInputStreamTest.java

@@ -350,8 +350,8 @@ public void testSingleByteRead_UTF8() throws IOException {
     public void testSkip(final String csName) throws Exception {
         final InputStream r = new CharSequenceInputStream("test", csName);
         try {
-            r.skip(1);
-            r.skip(2);
+            assertEquals(1, r.skip(1));
+            assertEquals(2, r.skip(2));
             assertEquals(csName, 't', r.read());
             r.skip(100);
             assertEquals(csName, -1, r.read());