anchor.diff:  ----
   package org.acme.getting.started.testing;
   
  -import java.io.ByteArrayOutputStream;
   import java.io.IOException;
   import java.io.InputStream;
   import java.net.URL;
  
positive.code: ----
  package org.acme.getting.started.testing;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.URL;
  
negative.code:     URL url;
  
      @Test
      public void testIndexHtml() throws IOException {
          try (InputStream in = url.openStream()) {
              String contents = new String(in.readAllBytes(), StandardCharsets.UTF_8);
              Assertions.assertEquals("hello", contents);
          }
      }
  }
  ----
  