"Storybook preview hooks can only be called inside decorators and story functions." error

Describe the bug

We’ve got a custom addon that we’ve written internally to allow us to document / manipulate our i18n translations inside storybooks & we’re having trouble getting it to work with this.

So far I’ve:

• Started to set up @storybookjs/testing-react (which, once we get it working will save a lot of time & be incredibly useful so thanks)
• Noticed that the decorator provided by the addon wasn’t being applied (which I guess makes sense? the .storybook/main.js with the addon array isn’t referenced anywhere)
• Thought I’d use the setGlobalConfig to manually add in the decorator from our addon
• Got the Storybook preview hooks can only be called inside decorators and story functions. error

Our decorator looks something like:

import React, { useEffect, useState } from "react"
import { I18nContext } from "@our_stuff/i18nContext"
import I18n from "@our_stuff/i18n"
import { makeDecorator, useGlobals, useParameter } from "@storybook/addons"

export const withOurI18n = makeDecorator({
  name: "withOurI18n",
  parameterName: "i18n",
  wrapper: (storyFn, context, { parameters }) => {
    const paramI18nData = useParameter("i18n", {})
    const [{ "our-intl": intlData }] = useGlobals()
    const [i18n, setI18n] = useState(getNewI18nForData(intlData || paramI18nData))

    useEffect(() => {
      if (intlData) setI18n(I18n(intlData))
    }, [intlData])

    return <I18nContext.Provider value={i18n}>{storyFn()}</I18nContext.Provider>
  },
})

(it’s rough & has bugs but it works when viewing one story in storybook)

Our jest.setup.js looks like:

import { setGlobalConfig } from "@storybook/testing-react"
import * as globalStorybookConfig from "../.storybook/preview"
import { withOurI18n } from "@our_stuff/storybook-addon-i18n/dist/decorators/withI18n"

setGlobalConfig({ ...globalStorybookConfig, decorators: [withOurI18n] })

At the moment our test looks pretty much exactly like the one in the getting started documentation

Let me know if there’s anything else I can provide that’d be useful

Expected behavior Would expect the decorators to function the same way they do when viewing the story in the storybook.