'Create symmetrical log locator with default subs =[1.0] numticks = 15,
and change it to something else.
See if change was successful.
Should not exception.'

def test_set_params(self):

    sym = mticker.SymmetricalLogLocator(base=10, linthresh=1)
    sym.set_params(subs=[2.0], numticks=8)
    assert (sym._subs == [2.0])
    assert (sym.numticks == 8)
