title: The method assertEquals(String, String) is undefined for the type TestJunit
body: <p>I am new to JUnit.
  I just started working on JUnit and i am getting following error.</p>
  
  <p><strong>The method assertEquals(String, String) is undefined for the type TestJunit</strong></p>
  
  <p>and my Javacode:</p>
  
  <pre><code>import org.junit.Test;
  import static org.junit.Assert.assertArrayEquals;
  
  public class TestJunit {
  
      String message = "Hello World";
      MessageUtil messageutil = new MessageUtil(message);
  
      public void testPrintMessage()
      {
          assertEquals(message,messageutil.printMessage());
  
      }
  }
  </code></pre>
  
  <p>please help me resolve this issue.</p>