def test_interval_union_simplification_three_step_connected():
iu = IntervalUnion([[0, 1], [2, 3], [4, 5], [1, 1337]])
iu._simplify()
assert iu.intervals == [Interval(0, 1337)]
def test_interval_union_simplification_disjoint():
iu = IntervalUnion([[0, 1], [42, 1337]])
iu._simplify()
assert iu.intervals == [Interval(0, 1), Interval(42, 1337)]
def test_interval_union_simplification_overlap_connected():
iu = IntervalUnion([[0, 3], [1, 1337]])
iu._simplify()
assert iu.intervals == [Interval(0, 1337)]
def test_interval_union_simplification_empty():
iu = IntervalUnion([])
iu._simplify()
assert iu.intervals == []
