@@ -0,0 +1,278 @@
+import org.junit.Test;%0Aimport static org.junit.Assert.*;%0A%0Apublic class MyUnitTest %7B%0A%0A    @Test%0A    public void testConcatenate() %7B%0A        MyUnit myUnit = new MyUnit();%0A%0A        String result = myUnit.concatenate(%22one%22, %22two%22);%0A%0A        assertEquals(%22onetwo%22, result);%0A%0A    %7D%0A%7D%0A

Create MyUnitTest.java