Added tests for the formatting of option groups

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/cli/branches/cli-1.x@661620 13f79535-47bb-0310-9956-ffa450edef68

Author: ebourg

src/java/org/apache/commons/cli/HelpFormatter.java

@@ -14,10 +14,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.apache.commons.cli;
 
 import java.io.PrintWriter;
-
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -30,7 +30,7 @@
  *
  * @author Slawek Zachcial
  * @author John Keyes (john at integralsource.com)
- **/
+ */
 public class HelpFormatter {
     // --------------------------------------------------------------- Constants
 

src/test/org/apache/commons/cli/HelpFormatterTest.java

@@ -19,6 +19,7 @@
 
 import java.io.ByteArrayOutputStream;
 import java.io.PrintWriter;
+import java.io.StringWriter;
 import java.util.Comparator;
 
 import junit.framework.TestCase;
@@ -221,4 +222,39 @@ public int compare(Object o1, Object o2) {
         assertEquals("usage: app [-c] [-b] [-a]" + EOL, bytesOut.toString());
     }
 
+    public void testPrintOptionGroupUsage() {
+        OptionGroup group = new OptionGroup();
+        group.addOption(OptionBuilder.create("a"));
+        group.addOption(OptionBuilder.create("b"));
+        group.addOption(OptionBuilder.create("c"));
+
+        Options options = new Options();
+        options.addOptionGroup(group);
+
+        StringWriter out = new StringWriter();
+
+        HelpFormatter formatter = new HelpFormatter();
+        formatter.printUsage(new PrintWriter(out), 80, "app", options);
+
+        assertEquals("usage: app [-a | -b | -c]" + EOL, out.toString());
+    }
+
+    public void testPrintRequiredOptionGroupUsage() {
+        OptionGroup group = new OptionGroup();
+        group.addOption(OptionBuilder.create("a"));
+        group.addOption(OptionBuilder.create("b"));
+        group.addOption(OptionBuilder.create("c"));
+        group.setRequired(true);
+
+        Options options = new Options();
+        options.addOptionGroup(group);
+
+        StringWriter out = new StringWriter();
+
+        HelpFormatter formatter = new HelpFormatter();
+        formatter.printUsage(new PrintWriter(out), 80, "app", options);
+
+        assertEquals("usage: app -a | -b | -c" + EOL, out.toString());
+    }
+
 }