package org.junit.tests.assertion;
   
   import static org.junit.Assert.assertEquals;
   
   import java.util.Arrays;
   import java.util.Collection;
   
   import org.junit.ComparisonFailure;
   import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.Parameterized;
  import org.junit.runners.Parameterized.Parameters;
  
  @RunWith(Parameterized.class)
  public class ComparisonFailureTest {
  		
  	private String expected, actual, message;
  	
  	public ComparisonFailureTest(String e, String a, String m) {
  		expected = e;
  		actual = a;
  		message = m;
  	}
  	
  	@Parameters(name = "compact-msg-{index}, exp=\"{1}\"")
  	public static Collection<Object[]> data() {
  		return Arrays.asList(new Object[][] {
  			// simple base case
  			{ "a", "b", "expected:<[a]> but was:<[b]>" },
  				
  			// common prefix
  			{ "ba", "bc", "expected:<b[a]> but was:<b[c]>" },
  				
  			// common suffix
  			{ "ab", "cb", "expected:<[a]b> but was:<[c]b>" },
  				
  			// common pre and suffix
  			{ "abc", "adc", "expected:<a[b]c> but was:<a[d]c>" },
  			
  			// expected is subset of actual
  			{ "ab", "abc", "expected:<ab[]> but was:<ab[c]>" },
  
  			// expected is superset of actual
  			{ "abc", "ab", "expected:<ab[c]> but was:<ab[]>" },
  			
  			// overlapping matches.
  			{ "abc", "abbc", "expected:<ab[]c> but was:<ab[b]c>" },
  
  			// long prefix yielding "..."
  			{ "01234567890123456789PRE:hello:POST", 
  				"01234567890123456789PRE:world:POST",
  				"expected:<...4567890123456789PRE:[hello]:POST> but was:<...4567890123456789PRE:[world]:POST>" },
  					
  			// long suffix	yielding "..."
  			{ "PRE:hello:01234567890123456789POST",
  				"PRE:world:01234567890123456789POST",
  				"expected:<PRE:[hello]:0123456789012345678...> but was:<PRE:[world]:0123456789012345678...>"	
  			},
  					
  			// bug609972
  			{ "S&P500", "0", "expected:<[S&P50]0> but was:<[]0>" },
  			
  			// empty expected string
  			{ "", "a", "expected:<[]> but was:<[a]>" },
  
  			// empty actual string
  			{ "a", "", "expected:<[a]> but was:<[]>" }
  
  		});	
  	}
  
  	@Test
  	public void compactFailureMessage() {
  		ComparisonFailure failure = new ComparisonFailure("", expected, actual);
  		assertEquals(message, failure.getMessage());
  	}
  	
  }