add tests

archetypes/simple-cli/src/test/java/example/ExampleItemReaderTests.java

@@ -0,0 +1,18 @@
+package example;
+
+import junit.framework.TestCase;
+
+public class ExampleItemReaderTests extends TestCase {
+
+	private ExampleItemReader reader = new ExampleItemReader();
+	
+	public void testReadOnce() throws Exception {
+		assertEquals("Hello world!", reader.read());
+	}
+
+	public void testReadTwice() throws Exception {
+		reader.read();
+		assertEquals(null, reader.read());
+	}
+
+}

archetypes/simple-cli/src/test/java/example/ExampleItemWriterTests.java

@@ -0,0 +1,13 @@
+package example;
+
+import junit.framework.TestCase;
+
+public class ExampleItemWriterTests extends TestCase {
+
+	private ExampleItemWriter writer = new ExampleItemWriter();
+	
+	public void testWrite() throws Exception {
+		writer.write(null); // nothing bad happens
+	}
+
+}