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# Tests domain errors in math functions
try:
import math
except ImportError:
print("SKIP")
raise SystemExit
inf = float("inf")
nan = float("nan")
# single argument functions
for name, f, args in (
("fabs", math.fabs, ()),
("ceil", math.ceil, ()),
("floor", math.floor, ()),
("trunc", math.trunc, ()),
("sqrt", math.sqrt, (-1, 0)),
("exp", math.exp, ()),
("log", math.log, ()),
("sin", math.sin, ()),
("cos", math.cos, ()),
("tan", math.tan, ()),
("asin", math.asin, (-1.1, 1, 1.1)),
("acos", math.acos, (-1.1, 1, 1.1)),
("atan", math.atan, ()),
("ldexp", lambda x: math.ldexp(x, 0), ()),
("radians", math.radians, ()),
("degrees", math.degrees, ()),
):
for x in args + (inf, -inf, nan):
try:
ans = "%.4f" % f(x)
except ValueError:
ans = "ValueError"
except OverflowError:
ans = "OverflowError"
print("%s(%.4f) = %s" % (name, x, ans))
# double argument functions
for name, f, args in (
(
"pow",
math.pow,
(
(0, 2),
(-1, 2),
(0, -1),
(-1, 2.3),
(0.5, inf),
(-0.5, inf),
(0.5, -inf),
(-0.5, -inf),
(1.5, inf),
(-1.5, inf),
(1.5, -inf),
(-1.5, -inf),
(nan, 0),
(1, nan),
),
),
("log", math.log, ()),
("fmod", math.fmod, ((1.2, inf), (1.2, -inf), (1.2, 0), (inf, 1.2))),
("atan2", math.atan2, ((0, 0), (-inf, inf), (-inf, -inf), (inf, -inf))),
("copysign", math.copysign, ()),
):
for x in args + ((0, inf), (inf, 0), (inf, inf), (inf, nan), (nan, inf), (nan, nan)):
try:
ans = "%.4f" % f(*x)
except ValueError:
ans = "ValueError"
print("%s(%.4f, %.4f) = %s" % (name, x[0], x[1], ans))
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