def METHOD_NAME(self, dtype):
    a = cupy.empty((1,), dtype=dtype)
    a[:] = 2.0 + 1E-6
    a = cupyx.scipy.special.erfcinv(a)
    assert cupy.isnan(a)
    a[:] = 0.0 - 1E-6
    a = cupyx.scipy.special.erfcinv(a)
    assert cupy.isnan(a)
    a[:] = 0.0
    a = cupyx.scipy.special.erfcinv(a)
    assert numpy.isposinf(cupy.asnumpy(a))
    a[:] = 2.0
    a = cupyx.scipy.special.erfcinv(a)
    assert numpy.isneginf(cupy.asnumpy(a))