private void checkDistanceIsUndefined(SequenceMetric metric, String x, String y) {
try {
metric.distance(x, y);
fail(
"Should throw an exception for words of unequal lengths"
+ " (between \""
+ x
+ "\" and \""
+ y
+ "\")");
} catch (IllegalArgumentException e) {
assertTrue(true);
}
try {
metric.distance(y, x);
fail(
"Should throw an exception for words of unequal lengths"
+ " (between \""
+ y
+ "\" and \""
+ x
+ "\")");
} catch (IllegalArgumentException e) {
assertTrue(true);
}
}
private void checkDistance(SequenceMetric metric, String x, String y, int expectedDistance) {
int distance1 = metric.distance(x, y);
int distance2 = metric.distance(y, x);
String message = " (between \"" + x + "\" and \"" + y + "\")";
assertEquals("Distance must be non-negative" + message, true, expectedDistance >= 0);
assertEquals("Distance must be symmetric" + message, distance1, distance2);
assertEquals("Incorrect distance" + message, expectedDistance, distance1);
}