Add roundtrip test.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1398020 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/test/java/org/apache/commons/csv/CSVParserTest.java

@@ -31,6 +31,7 @@
 import java.io.IOException;
 import java.io.Reader;
 import java.io.StringReader;
+import java.io.StringWriter;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
@@ -435,6 +436,17 @@ public void testForEach() throws Exception {
         assertArrayEquals(new String[]{"x", "y", "z"}, records.get(2).values());
     }
 
+    @Test
+    public void testRoundtrip() throws Exception {
+        StringWriter out = new StringWriter();
+        CSVPrinter printer = new CSVPrinter(out, CSVFormat.DEFAULT);
+        final String input = "a,b,c\r\n1,2,3\r\nx,y,z\r\n";
+        for (final CSVRecord record : CSVFormat.DEFAULT.parse(new StringReader(input))) {
+            printer.printRecord(record);
+        }
+        assertEquals(input, out.toString());
+    }
+
     @Test
     public void testIterator() throws Exception {
         final Reader in = new StringReader("a,b,c\n1,2,3\nx,y,z");