# test the special functions imported from math

try:
    from math import *

    erf
except (ImportError, NameError):
    print("SKIP")
    raise SystemExit

test_values = [-8.0, -2.5, -1, -0.5, 0.0, 0.5, 2.5, 8.0]
pos_test_values = [0.001, 0.1, 0.5, 1.0, 1.5, 10.0]

functions = [
    ("expm1", expm1, test_values),
    ("log2", log2, test_values),
    ("log10", log10, test_values),
    ("cosh", cosh, test_values),
    ("sinh", sinh, test_values),
    ("tanh", tanh, test_values),
    ("acosh", acosh, [1.0, 5.0, 1.0]),
    ("asinh", asinh, test_values),
    ("atanh", atanh, [-0.99, -0.5, 0.0, 0.5, 0.99]),
    ("erf", erf, test_values),
    ("erfc", erfc, test_values),
    ("gamma", gamma, pos_test_values),
    ("lgamma", lgamma, pos_test_values + [50.0, 100.0]),
]

for function_name, function, test_vals in functions:
    print(function_name)
    for value in test_vals:
        try:
            print("{:.4g}".format(function(value)))
        except ValueError as e:
            print(str(e))