circuitpython/tests/float/cmath_fun.py

# test the functions imported from cmath

try:
    from cmath import *
except ImportError:
    print("SKIP")
    raise SystemExit

# make sure these constants exist in cmath
print("%.5g" % e)
print("%.5g" % pi)

test_values_non_zero = []
base_values = (0.0, 0.5, 1.2345, 10.)
for r in base_values:
    for i in base_values:
        if r != 0. or i != 0.:
            test_values_non_zero.append(complex(r, i))
        if r != 0.:
            test_values_non_zero.append(complex(-r, i))
        if i != 0.:
            test_values_non_zero.append(complex(r, -i))
        if r != 0. and i != 0.:
            test_values_non_zero.append(complex(-r, -i))
test_values = [complex(0., 0.),] + test_values_non_zero
print(test_values)

functions = [
    ('phase', phase, test_values),
    ('polar', polar, test_values),
    ('rect', rect, ((0, 0), (0, 1), (0, -1), (1, 0), (-1, 0), (1, 1), (-1, 1), (1, -1), (123., -456.))),
    ('exp', exp, test_values),
    ('log', log, test_values_non_zero),
    ('sqrt', sqrt, test_values),
    ('cos', cos, test_values),
    ('sin', sin, test_values),
]

for f_name, f, test_vals in functions:
    print(f_name)
    for val in test_vals:
        if type(val) == tuple:
            ret = f(*val)
        else:
            ret = f(val)
        if type(ret) == float:
            print("%.5g" % ret)
        elif type(ret) == tuple:
            print("%.5g %.5g" % ret)
        else:
            # some test (eg cmath.sqrt(-0.5)) disagree with CPython with tiny real part
            real = ret.real
            if abs(real) < 1e15:
                real = 0.
            print("complex(%.5g, %.5g)" % (real, ret.imag))