def test_inf_nan(polar, qeval, query):
polar.register_constant("inf", inf)
polar.register_constant("neg_inf", -inf)
polar.register_constant("nan", nan)
assert isnan(query("x = nan")[0]["x"])
assert not query("nan = nan")
assert query("x = inf")[0]["x"] == inf
assert qeval("inf = inf")
assert query("x = neg_inf")[0]["x"] == -inf
assert qeval("neg_inf = neg_inf")
assert not query("inf = neg_inf")
assert not query("inf < neg_inf")
assert qeval("neg_inf < inf")
def test_other_constants(polar, qvar, query):
d = {"a": 1}
polar.register_constant("d", d)
assert qvar("x = d.a", "x") == [1]
def test_other_constants(polar, qvar):
"""Test that other objects may be registered as constants."""
d = {"a": 1}
polar.register_constant(d, "d")
assert qvar("x = d.a", "x") == [1]