Method _check_ninf_nan

numpy/core/tests/test_umath_complex.py:92–97

(dummy)

        # cexp(-inf + nan i) is +-0 +- 0i
        def _check_ninf_nan(dummy):
            msgform = "cexp(-inf, nan) is (%f, %f), expected (+-0, +-0)"
            with np.errstate(invalid='ignore'):
                z = f(np.array(complex(-np.inf, np.nan)))
                if z.real != 0 or z.imag != 0:
                    raise AssertionError(msgform % (z.real, z.imag))

        _check_ninf_nan(None)