package examples;
   
   import org.pojomatic.formatter.EnhancedPropertyFormatter;
   import org.testng.annotations.Test;
   
   import static org.testng.Assert.*;
   
   public class IpAddressFormatterTest {
     private final static EnhancedPropertyFormatter FORMATTER = new IpAddressFormatter();
  
    @Test
    public void appendFormattedNull() {
      assertFormat("null", null);
    }
  
    @Test
    public void appendFormattedEmpty() {
      assertFormat("");
    }
  
    @Test
    public void appendFormatSingleByte() {
      assertFormat("4", (byte) 4);
      assertFormat("252", (byte) 252);
    }
  
    @Test void appendFormatMultiByte() {
      assertFormat("10.254.7.3", (byte) 10, (byte) -2, (byte) 7, (byte)3);
    }
  
    private void assertFormat(String expected, byte... array) {
      StringBuilder builder = new StringBuilder();
      FORMATTER.appendFormatted(builder, array);
      assertEquals(builder.toString(), expected);
    }
  }