def test_intervals_subtract(self, x, y):
nullx = NullInterval(x)
# All nulls
assert nullx.subtract(nullx) == nullx
ix = Interval(x, 2, -2)
# Mixed nulls and defined on the same dimension
assert nullx.subtract(ix) == nullx
assert ix.subtract(ix) == Interval(x, 0, 0)
assert ix.subtract(nullx) == ix
ix2 = Interval(x, 4, -4)
ix3 = Interval(x, 6, -6)
# All defined same dimension
assert ix2.subtract(ix) == ix
assert ix.subtract(ix2) == Interval(x, -2, 2)
assert ix3.subtract(ix) == ix2
c = Constant(name='c')
ix4 = Interval(x, c + 2, c + 4)
ix5 = Interval(x, c + 1, c + 5)
# All defined symbolic
assert ix4.subtract(ix5) == Interval(x, 1, -1)
assert ix5.subtract(ix4) == Interval(x, -1, 1)
assert ix5.subtract(ix) == Interval(x, c - 1, c + 7)
def test_intervals_subtract(self):
nullx = NullInterval(x)
# All nulls
assert nullx.subtract(nullx) == nullx
ix = Interval(x, 2, -2)
# Mixed nulls and defined on the same dimension
assert nullx.subtract(ix) == nullx
assert ix.subtract(ix) == Interval(x, 0, 0)
assert ix.subtract(nullx) == ix
ix2 = Interval(x, 4, -4)
ix3 = Interval(x, 6, -6)
# All defined same dimension
assert ix2.subtract(ix) == ix
assert ix.subtract(ix2) == Interval(x, -2, 2)
assert ix3.subtract(ix) == ix2
def test_intervals_subtract(self):
nullx = NullInterval(x)
# All nulls
assert nullx.subtract(nullx) == nullx
ix = Interval(x, 2, -2)
# Mixed nulls and defined on the same dimension
assert nullx.subtract(ix) == nullx
assert ix.subtract(ix) == Interval(x, 0, 0)
assert ix.subtract(nullx) == ix
ix2 = Interval(x, 4, -4)
ix3 = Interval(x, 6, -6)
# All defined same dimension
assert ix2.subtract(ix) == ix
assert ix.subtract(ix2) == Interval(x, -2, 2)
assert ix3.subtract(ix) == ix2