1 package org.junit.internal; 2 3 import java.util.ArrayList; 4 import java.util.List; 5 6 import org.junit.Assert; 7 8 /** 9 * Thrown when two array elements differ 10 * 11 * @see Assert#assertArrayEquals(String, Object[], Object[]) 12 */ 13 public class ArrayComparisonFailure extends AssertionError { 14 15 private static final long serialVersionUID = 1L; 16 17 /* 18 * We have to use the f prefix until the next major release to ensure 19 * serialization compatibility. 20 * See https://github.com/junit-team/junit/issues/976 21 */ 22 private final List<Integer> fIndices = new ArrayList<Integer>(); 23 private final String fMessage; 24 25 /** 26 * Construct a new <code>ArrayComparisonFailure</code> with an error text and the array's 27 * dimension that was not equal 28 * 29 * @param cause the exception that caused the array's content to fail the assertion test 30 * @param index the array position of the objects that are not equal. 31 * @see Assert#assertArrayEquals(String, Object[], Object[]) 32 */ 33 public ArrayComparisonFailure(String message, AssertionError cause, int index) { 34 this.fMessage = message; 35 initCause(cause); 36 addDimension(index); 37 } 38 39 public void addDimension(int index) { 40 fIndices.add(0, index); 41 } 42 43 @Override 44 public String getMessage() { 45 StringBuilder sb = new StringBuilder(); 46 if (fMessage != null) { 47 sb.append(fMessage); 48 } 49 sb.append("arrays first differed at element "); 50 for (int each : fIndices) { 51 sb.append("["); 52 sb.append(each); 53 sb.append("]"); 54 } 55 sb.append("; "); 56 sb.append(getCause().getMessage()); 57 return sb.toString(); 58 } 59 60 /** 61 * {@inheritDoc} 62 */ 63 @Override 64 public String toString() { 65 return getMessage(); 66 } 67 } 68
