Add missing code coverage

Author: garydgregory

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

@@ -79,6 +79,11 @@ private void assertNotEquals(final String name, final String type, final Object
         }
     }
 
+    @Test
+    public void testDelimiterEmptyStringThrowsException1() {
+        assertThrows(IllegalArgumentException.class, () -> CSVFormat.DEFAULT.builder().setDelimiter("").build());
+    }
+
     @SuppressWarnings("deprecation")
     @Test
     public void testDelimiterSameAsCommentStartThrowsException_Deprecated() {
@@ -797,6 +802,22 @@ public void testNullRecordSeparatorCsv106__Deprecated() {
         assertFalse(formatStr.endsWith("null"));
     }
 
+    @Test
+    public void testPrintRecord() throws IOException {
+        final Appendable out = new StringBuilder();
+        final CSVFormat format = CSVFormat.RFC4180;
+        format.printRecord(out, "a", "b", "c");
+        assertEquals("a,b,c" + format.getRecordSeparator(), out.toString());
+    }
+
+    @Test
+    public void testPrintRecordEmpty() throws IOException {
+        final Appendable out = new StringBuilder();
+        final CSVFormat format = CSVFormat.RFC4180;
+        format.printRecord(out);
+        assertEquals(format.getRecordSeparator(), out.toString());
+    }
+
     @Test
     public void testPrintWithEscapesEndWithCRLF() throws IOException {
         final Reader in = new StringReader("x,y,x\r\na,?b,c\r\n");
@@ -1419,9 +1440,4 @@ public void testWithSystemRecordSeparator() {
         final CSVFormat formatWithRecordSeparator = CSVFormat.DEFAULT.withSystemRecordSeparator();
         assertEquals(System.lineSeparator(), formatWithRecordSeparator.getRecordSeparator());
     }
-
-    @Test
-    public void testDelimiterEmptyStringThrowsException1() {
-        assertThrows(IllegalArgumentException.class, () -> CSVFormat.DEFAULT.builder().setDelimiter("").build());
-    }
 }