1 files changed, 86 insertions, 0 deletions
diff --git a/src/test/java/com/beust/jcommander/CmdTest.java b/src/test/java/com/beust/jcommander/CmdTest.java
new file mode 100644
index 0000000..6601193
--- /dev/null
+++ b/src/test/java/com/beust/jcommander/CmdTest.java
@@ -0,0 +1,86 @@
+package com.beust.jcommander;
+
+import org.testng.Assert;
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+
+public class CmdTest {
+
+    @Parameters(commandNames = "--cmd-one")
+    public static class CmdOne {
+    }
+
+    @Parameters(commandNames = "--cmd-two")
+    class CmdTwo {
+        @Parameter
+        List<String> params = new java.util.LinkedList<String>();
+    }
+
+    public String parseArgs(boolean withDefault, String[] args) {
+        JCommander jc = new JCommander();
+        jc.addCommand(new CmdOne());
+        jc.addCommand(new CmdTwo());
+
+        if (withDefault) {
+            // First check if a command was given, when not prepend default
+            // command (--cmd-two")
+            // In version up to 1.23 JCommander throws an Exception in this
+            // line,
+            // which might be incorrect, at least its not reasonable if the
+            // method
+            // is named "WithoutValidation".
+            jc.parseWithoutValidation(args);
+            if (jc.getParsedCommand() == null) {
+                LinkedList<String> newArgs = new LinkedList<String>();
+                newArgs.add("--cmd-two");
+                newArgs.addAll(Arrays.asList(args));
+                jc.parse(newArgs.toArray(new String[0]));
+            }
+        } else {
+            jc.parse(args);
+        }
+        return jc.getParsedCommand();
+    }
+
+    @DataProvider
+    public Object[][] testData() {
+        return new Object[][] {
+                new Object[] { "--cmd-one", false, new String[] { "--cmd-one" } },
+                new Object[] { "--cmd-two", false, new String[] { "--cmd-two" } },
+                new Object[] { "--cmd-two", false,
+                        new String[] { "--cmd-two", "param1", "param2" } },
+                // This is the relevant test case to test default commands
+                new Object[] { "--cmd-two", true,
+                        new String[] { "param1", "param2" } } };
+    }
+
+    @Test(dataProvider = "testData")
+    public void testArgsWithoutDefaultCmd(String expected,
+            boolean requireDefault, String[] args) {
+        if (!requireDefault) {
+            Assert.assertEquals(parseArgs(false, args), expected);
+        }
+    }
+
+    @Test(dataProvider = "testData", expectedExceptions = MissingCommandException.class)
+    public void testArgsWithoutDefaultCmdFail(String expected,
+            boolean requireDefault, String[] args) {
+        if (requireDefault) {
+            parseArgs(false, args);
+        } else {
+            throw new MissingCommandException("irrelevant test case");
+        }
+    }
+
+    // We do not expect a MissingCommandException!
+    @Test(dataProvider = "testData")
+    public void testArgsWithDefaultCmd(String expected, boolean requireDefault,
+            String[] args) {
+        Assert.assertEquals(parseArgs(true, args), expected);
+    }
+
+}
+\ No newline at end of file