Collection<StructuralDiff> columnDiffs = event.getColumnDiffs();
Assert.assertNotNull(columnDiffs);
Assert.assertEquals(2, columnDiffs.size());
Iterator<StructuralDiff> iterator = columnDiffs.iterator();
Assert.assertEquals(new StructuralDiff(DiffTypeEnum.DELETE, new Range(
7, 10), new Range(10, 10)), iterator.next());
Assert.assertEquals(new StructuralDiff(DiffTypeEnum.ADD,
new Range(2, 2), new Range(2, 5)), iterator.next());
}