1 files changed, 56 insertions, 0 deletions
diff --git a/args4j/args4j/test/ExampleTest.java b/args4j/args4j/test/ExampleTest.java
new file mode 100644
index 0000000..85df342
--- /dev/null
+++ b/args4j/args4j/test/ExampleTest.java
@@ -0,0 +1,56 @@
+import java.io.File;
+
+import junit.framework.TestCase;
+
+import org.kohsuke.args4j.CmdLineException;
+import org.kohsuke.args4j.CmdLineParser;
+import org.kohsuke.args4j.ExampleMode;
+import org.kohsuke.args4j.Option;
+
+/**
+ * Tests {@link CmdLineParser#printExample(ExampleMode)}
+ *
+ * @author Kohsuke Kawaguchi
+ */
+public class ExampleTest extends TestCase {
+    @Option(required = true, name = "-a", usage = "this is X")
+    int x;
+
+    @Option(name = "-b", usage = "this is Y", metaVar = "<output>")
+    File y;
+
+    public void testPrintExampleModeAll() {
+        String s = new CmdLineParser(this).printExample(ExampleMode.ALL);
+        assertEquals(" -a N -b <output>", s);
+    }
+
+    public void testPrintExampleModeRequired() {
+        String s = new CmdLineParser(this).printExample(ExampleMode.REQUIRED);
+        assertEquals(" -a N", s);
+    }
+
+    public void testParsingAllArgs() throws Exception {
+        CmdLineParser parser = new CmdLineParser(this);
+        parser.parseArgument("-a", "1", "-b", "foo");
+        assertEquals(1, x);
+        assertEquals(new File("foo"), y);
+    }
+
+    public void testParsingOnlyRequiredArgs() throws Exception {
+        CmdLineParser parser = new CmdLineParser(this);
+        parser.parseArgument("-a", "1");
+        assertEquals(1, x);
+        assertNull(y);
+    }
+
+    public void testParsingMissingRequiredArgs() throws Exception {
+        CmdLineParser parser = new CmdLineParser(this);
+        try {
+            parser.parseArgument("-b", "foo");
+            fail("Should have thrown an exception because"
+                    + " required arg 'a' is missing");
+        } catch (CmdLineException e) {
+            assertEquals("Option \"-a\" is required", e.getMessage());
+        }
+    }
+}