Fixed problem whereby Parameters returning Lists and with alternate names were being reset on the first use of an alternate name. Added test to ensure correct behaviour.

3 files changed, 62 insertions, 2 deletions

diff --git a/src/main/java/com/beust/jcommander/JCommander.java b/src/main/java/com/beust/jcommander/JCommander.java
index b78d890..a763bc1 100644
--- a/src/main/java/com/beust/jcommander/JCommander.java
+++ b/src/main/java/com/beust/jcommander/JCommander.java
@@ -544,13 +544,13 @@ public class JCommander {
           m_mainParameterDescription =
               new ParameterDescription(object, p, parameterized, m_bundle, this);
         } else {
+          ParameterDescription pd =
+              new ParameterDescription(object, p, parameterized, m_bundle, this);
           for (String name : p.names()) {
             if (m_descriptions.containsKey(new StringKey(name))) {
               throw new ParameterException("Found the option " + name + " multiple times");
             }
             p("Adding description for " + name);
-            ParameterDescription pd =
-                new ParameterDescription(object, p, parameterized, m_bundle, this);
             m_fields.put(parameterized, pd);
             m_descriptions.put(new StringKey(name), pd);
 
diff --git a/src/test/java/com/beust/jcommander/JCommanderTest.java b/src/test/java/com/beust/jcommander/JCommanderTest.java
index 356d442..be9a7ea 100644
--- a/src/test/java/com/beust/jcommander/JCommanderTest.java
+++ b/src/test/java/com/beust/jcommander/JCommanderTest.java
@@ -18,6 +18,7 @@
 
 package com.beust.jcommander;
 
+import com.beust.jcommander.args.AlternateNamesForListArgs;
 import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.FileWriter;
@@ -96,6 +97,35 @@ public class JCommanderTest {
     Assert.assertEquals(args.date, new SimpleDateFormat("yyyy-MM-dd").parse("2011-10-26"));
   }
 
+  @DataProvider
+  public Object[][] alternateNamesListArgs() {
+    return new Object[][] {
+        new String[][] {new String[] {"--servers", "1", "-s", "2", "--servers", "3"}},
+        new String[][] {new String[] {"-s", "1", "-s", "2", "--servers", "3"}},
+        new String[][] {new String[] {"--servers", "1", "--servers", "2", "-s", "3"}},
+        new String[][] {new String[] {"-s", "1", "--servers", "2", "-s", "3"}},
+        new String[][] {new String[] {"-s", "1", "-s", "2", "--servers", "3"}},
+    };
+  }
+  
+  /**
+   *  Confirm that List<?> parameters with alternate names return the correct
+   * List regardless of how the arguments are specified
+   */
+  
+  @Test(dataProvider = "alternateNamesListArgs")
+  public void testAlternateNamesForListArguments(String[] argv) {
+      AlternateNamesForListArgs args = new AlternateNamesForListArgs();
+      
+      new JCommander(args, argv);
+      
+      Assert.assertEquals(args.serverNames.size(), 3);
+      Assert.assertEquals(args.serverNames.get(0), argv[1]);
+      Assert.assertEquals(args.serverNames.get(1), argv[3]);
+      Assert.assertEquals(args.serverNames.get(2), argv[5]);
+  }
+  
+  
   /**
    * Make sure that if there are args with multiple names (e.g. "-log" and "-verbose"),
    * the usage will only display it once.
diff --git a/src/test/java/com/beust/jcommander/args/AlternateNamesForListArgs.java b/src/test/java/com/beust/jcommander/args/AlternateNamesForListArgs.java
new file mode 100644
index 0000000..cf05bd3
--- /dev/null
+++ b/src/test/java/com/beust/jcommander/args/AlternateNamesForListArgs.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2014 alaw3.
+ *
+ * Licensed 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 com.beust.jcommander.args;
+
+import com.beust.jcommander.Parameter;
+import com.beust.jcommander.internal.Lists;
+import java.util.List;
+
+/**
+ *
+ * @author alaw3
+ */
+public class AlternateNamesForListArgs {
+
+    @Parameter(names = {"-s", "--servers"}, description = "blah")
+    public List<String> serverNames = Lists.newLinkedList();
+}