def test_params():
mod = MLEModel([1,2], **kwargs)
# By default start_params raises NotImplementedError
assert_raises(NotImplementedError, lambda: mod.start_params)
# But param names are by default an empty array
assert_equal(mod.param_names, [])
# We can set them in the object if we want
mod._start_params = [1]
mod._param_names = ['a']
assert_equal(mod.start_params, [1])
assert_equal(mod.param_names, ['a'])
