class Assert {
/** Asserts that two iterators return the same elements in the same order. If they do not,
* an AssertionError, with the given message, is thrown.
* Please note that this assert iterates over the elements and modifies the state of the iterators.
* @param actual the actual value
* @param expected the expected value
* @param message the assertion error message
*/
static public void assertEquals(Iterator<?> actual, Iterator<?> expected, String message) {
if(actual == expected) {
return;
}
if(actual == null || expected == null) {
if(message != null) {
fail(message);
} else {
fail("Iterators not equal: expected: " + expected + " and actual: " + actual);
}
}
int i = -1;
while(actual.hasNext() && expected.hasNext()) {
i++;
Object e = expected.next();
Object a = actual.next();
String explanation = "Iterators differ at element [" + i + "]: " + e + " != " + a;
String errorMessage = message == null ? explanation : message + ": " + explanation;
assertEqualsImpl(a, e, errorMessage);
}
if(actual.hasNext()) {
String explanation = "Actual iterator returned more elements than the expected iterator.";
String errorMessage = message == null ? explanation : message + ": " + explanation;
fail(errorMessage);
} else if(expected.hasNext()) {
String explanation = "Expected iterator returned more elements than the actual iterator.";
String errorMessage = message == null ? explanation : message + ": " + explanation;
fail(errorMessage);
}
}
}
