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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 in (
("fabs", math.fabs),
("ceil", math.ceil),
("floor", math.floor),
("trunc", math.trunc),
("sqrt", math.sqrt),
("exp", math.exp),
("log", math.log),
("sin", math.sin),
("cos", math.cos),
("tan", math.tan),
("asin", math.asin),
("acos", math.acos),
("atan", math.atan),
("ldexp", lambda x: math.ldexp(x, 0)),
("radians", math.radians),
("degrees", math.degrees),
):
for x in (0, 1, 1.12, -1, -1.12, 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 in (
("pow", math.pow),
("log", math.log),
("fmod", math.fmod),
("atan2", math.atan2),
("copysign", math.copysign),
):
for x in (
(0, 0),
(0, 2),
(0, -1),
(1, 0),
(1.2, 0),
(-1, 0),
(-1, 2),
(-1, 2.3),
(0, inf),
(0.5, inf),
(0.5, -inf),
(0.9, inf),
(0.9, -inf),
(1.2, inf),
(1.2, -inf),
(-0.5, inf),
(-0.5, -inf),
(-0.9, inf),
(-0.9, -inf),
(-1.2, inf),
(-1.2, -inf),
(inf, 0),
(inf, 1.2),
(inf, -1.2),
(inf, inf),
(inf, -inf),
(-inf, inf),
(-inf, -inf),
(0, nan),
(nan, 0),
(1, nan),
(nan, 1),
(inf, nan),
(nan, inf),
(nan, nan),
):
try:
ans = "%.4f" % f(*x)
except ValueError:
ans = "ValueError"
except ZeroDivisionError:
ans = "ZeroDivisionError"
print("%s(%.4f, %.4f) = %s" % (name, x[0], x[1], ans))
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