Fixed CSV-271 & Add testcase for new change (apache#157)

Author: amarlearning

src/main/java/org/apache/commons/csv/CSVPrinter.java

@@ -281,8 +281,7 @@ public void printRecord(final Iterable<?> values) throws IOException {
      *             If an I/O error occurs
      */
     public void printRecord(final Object... values) throws IOException {
-        format.printRecord(out, values);
-        newRecord = true;
+        printRecord(Arrays.asList(values));
     }
 
     /**

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

@@ -43,6 +43,7 @@
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.util.Arrays;
+import java.util.Objects;
 
 import org.junit.jupiter.api.Test;
 
@@ -771,7 +772,7 @@ public void testFormatThrowsNullPointerException() {
         final CSVFormat csvFormat = CSVFormat.MYSQL;
 
         final NullPointerException e = assertThrows(NullPointerException.class, () -> csvFormat.format((Object[]) null));
-        assertEquals(CSVFormat.class.getName(), e.getStackTrace()[0].getClassName());
+        assertEquals(Objects.class.getName(), e.getStackTrace()[0].getClassName());
     }
 
     @Test

src/test/java/org/apache/commons/csv/issues/JiraCsv271Test.java

@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.csv.issues;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.io.IOException;
+import java.io.StringWriter;
+import java.util.Arrays;
+
+import org.apache.commons.csv.CSVFormat;
+import org.apache.commons.csv.CSVPrinter;
+import org.junit.jupiter.api.Test;
+
+public class JiraCsv271Test {
+
+    @Test
+    public void testJiraCsv271_withArray() throws IOException {
+        final CSVFormat csvFormat = CSVFormat.DEFAULT;
+        final StringWriter stringWriter = new StringWriter();
+        try (CSVPrinter printer = new CSVPrinter(stringWriter, csvFormat)) {
+            printer.print("a");
+            printer.printRecord("b","c");
+        }
+        assertEquals("a,b,c\r\n", stringWriter.toString());
+    }
+
+    @Test
+    public void testJiraCsv271_withList() throws IOException {
+        final CSVFormat csvFormat = CSVFormat.DEFAULT;
+        final StringWriter stringWriter = new StringWriter();
+        try (CSVPrinter printer = new CSVPrinter(stringWriter, csvFormat)) {
+            printer.print("a");
+            printer.printRecord(Arrays.asList("b","c"));
+        }
+        assertEquals("a,b,c\r\n", stringWriter.toString());
+    }
+
+}