def test_creation_errors():
with pytest.raises(
ArithmeticError,
match=
"`width` of interval must number higher or at least equal to 0."):
IntervalFactory.midpoint_width(0, -1)
with pytest.raises(
ValueError,
match=
"The interval is invalid. `minimum` must be lower or equal to `maximum`"
):
IntervalFactory.infimum_supremum(3, 1)
with pytest.raises(
ValueError,
match="`precision` should be value from range `0` to `15`"):
Interval(1, 3, precision=-1)
Interval(1, 3, precision=16)
with pytest.warns(UserWarning, match="Using default value of precision"):
Interval(1, 3, precision="pre")
with pytest.raises(ValueError,
match="Cannot parse Interval from this definition"):
IntervalFactory.parse_string("[1, 2.5, 5]")
with pytest.raises(ValueError,
match="Cannot parse Interval from this definition"):
IntervalFactory.parse_string("[]")
with pytest.raises(ValueError,
match="Cannot parse Interval from this definition"):
IntervalFactory.parse_string("[\"aa\", \"b\"]")
def test_mid_point():
a = IntervalFactory.two_values(1, 2)
assert a.mid_point == 1.5
b = IntervalFactory.midpoint_width(2, 2)
assert b.mid_point == 2