code: import static org.junit.Assert.assertEquals;
  
  import java.io.FileNotFoundException;
  import java.io.PrintStream;
  import java.nio.file.Paths;
  
  import org.junit.Test;
  
  import com.acme.Simple;
  
  public class SimpleTest {
  
      @Test
      public void callHttpClientTest() {
          Simple p = null;
          try {
              p = new Simple();
              p.callHttpClient("https://example.com");
          } catch (Exception e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
          }
      }
  }