SolidJS•2y ago

Testing portals

Hey, I am currently trying to test a datepicker created with https://github.com/rnwonder/solid-date-picker with testing-libary. However I am not quite sure how to select the actual picker. It seems to get rendered into a div with the id portal-island, which also shows up in my test, but without its contents. What would be the general way to test this? I also tried to jsut use querySelector but am not sure, how to get the correct container element to attach the querySelector to. Thanks in advance

GitHub

GitHub - rnwonder/solid-date-picker: A simple and reusable Datepick...

A simple and reusable Datepicker component for SolidJS - GitHub - rnwonder/solid-date-picker: A simple and reusable Datepicker component for SolidJS

9 Replies

Nathan•2y ago

Do you have some example test code?

oneiroOP•2y ago

a very minimal example of the test would probably look something like this:

render(() => <App />, { location: '/' })
if (useFakeTimers) {
    vi.useFakeTimers()
}
const fakeSystemTime = new Date(2023, 6, 2)
const day = 28

const pickerInput = screen.getByTestId(/Date picker selectedDate-editTimeEntry/i)
expect(pickerInput).toBeVisible()

const targetDate = setDate(fakeSystemTime, day)

// NOTE:
// We avoid 'format()' here on purpose, because the date-picker implementation we use
// uses the javascript date als value for their data attribute. This means that the month
// is zero based instead of 1 based (e.g. meaning July === 6 instead of 7).
const selector = `div[data-value="${getYear(targetDate)}-${getMonth(targetDate)}-${day}"]`

// not sure if there is a way to use queries instead of the query selector here
const picker = ?.querySelector(selector)

render(() => <App />, { location: '/' })
if (useFakeTimers) {
    vi.useFakeTimers()
}
const fakeSystemTime = new Date(2023, 6, 2)
const day = 28

const pickerInput = screen.getByTestId(/Date picker selectedDate-editTimeEntry/i)
expect(pickerInput).toBeVisible()

const targetDate = setDate(fakeSystemTime, day)

// NOTE:
// We avoid 'format()' here on purpose, because the date-picker implementation we use
// uses the javascript date als value for their data attribute. This means that the month
// is zero based instead of 1 based (e.g. meaning July === 6 instead of 7).
const selector = `div[data-value="${getYear(targetDate)}-${getMonth(targetDate)}-${day}"]`

// not sure if there is a way to use queries instead of the query selector here
const picker = ?.querySelector(selector)

oh wait, I completely forgot to click the pickerinput... that's probably the first issue here 😅 I would now be able to find one of the picker buttons by calling screen.getByText(<some-day-number>) - however looking for text by a number would probably be rather unreliable in the context of a picker.

Nathan•2y ago

Hmm, why is that?

oneiroOP•2y ago

ah yeah sorry, some more context: I am actually writing a small helper to make the interaction with the picker repeatable (a small layer of abstraction over our application UI). The actual wrapper would look something like this:

{
...
        editDateWithPicker: ({
            day,
            useFakeTimers = true,
            fakeSystemTime = new Date(2023, 6, 2),
        }: {
            day: number
            useFakeTimers?: boolean
            fakeSystemTime?: Date
        }) => {
            if (useFakeTimers) {
                vi.useFakeTimers()
            }

            const pickerInput = screen.getByTestId(/Date picker selectedDate-editTimeEntry/i)
            expect(pickerInput).toBeVisible()
            fireEvent.click(pickerInput)

            const targetDate = setDate(fakeSystemTime, day)

            const test = screen.getByText(day)
            console.log({ test })

            // NOTE:
            // We avoid 'format()' here on purpose, because the date-picker implementation we use
            // uses the javascript date als value for their data attribute. This means that the month
            // is zero based instead of 1 based (e.g. meaning July === 6 instead of 7).
            const selector = `div[data-value="${getYear(targetDate)}-${getMonth(targetDate)}-${day}"]`

        },
...
}

{
...
        editDateWithPicker: ({
            day,
            useFakeTimers = true,
            fakeSystemTime = new Date(2023, 6, 2),
        }: {
            day: number
            useFakeTimers?: boolean
            fakeSystemTime?: Date
        }) => {
            if (useFakeTimers) {
                vi.useFakeTimers()
            }

            const pickerInput = screen.getByTestId(/Date picker selectedDate-editTimeEntry/i)
            expect(pickerInput).toBeVisible()
            fireEvent.click(pickerInput)

            const targetDate = setDate(fakeSystemTime, day)

            const test = screen.getByText(day)
            console.log({ test })

            // NOTE:
            // We avoid 'format()' here on purpose, because the date-picker implementation we use
            // uses the javascript date als value for their data attribute. This means that the month
            // is zero based instead of 1 based (e.g. meaning July === 6 instead of 7).
            const selector = `div[data-value="${getYear(targetDate)}-${getMonth(targetDate)}-${day}"]`

        },
...
}

So the day is configurable. Therefore it could technically happen, that a day is being used, that is not unique on the screen. But maybe I am overthinking this...

Nathan•2y ago

I see. Would it be overboard to aria-label them with the month? Or maybe you could pick them out by style, if you want to avoid just going "I pick the first one because I know that's the right one"

oneiroOP•2y ago

yeah, unfortunately I don't have access to the underlying day element, so I can't put an arial-label onto it (which would otherwise have been my first cause of action). Maybe picking by style might work - thanks for the suggestion 👍 oh wait, I am just seeing that these days might already have an aria-label I could select at 🤩

Nathan•2y ago

hooray for accessibility

oneiroOP•2y ago

yes, that works nicely, for reference, here's my updated code:

editDateWithPicker: ({
    day,
    useFakeTimers = true,
    fakeSystemTime = new Date(2023, 6, 2),
}: {
    day: number
    useFakeTimers?: boolean
    fakeSystemTime?: Date
}) => {
    if (useFakeTimers) {
        vi.useFakeTimers()
    }

    const pickerInput = screen.getByTestId(/Date picker selectedDate-editTimeEntry/i)
    expect(pickerInput).toBeVisible()

    fireEvent.click(pickerInput)

    const targetDate = setDate(fakeSystemTime, day)

    // NOTE:
    // We avoid 'format()' here on purpose, because the date-picker implementation we use
    // uses the javascript date als value for their data attribute. This means that the month
    // is zero based instead of 1 based (e.g. meaning July === 6 instead of 7).
    const targetDateString = `${getYear(targetDate)}-${getMonth(targetDate)}-${day}`

    const dayButton = screen.getByRole('button', { name: `Choose ${targetDateString}` })
    fireEvent.click(dayButton)
}

editDateWithPicker: ({
    day,
    useFakeTimers = true,
    fakeSystemTime = new Date(2023, 6, 2),
}: {
    day: number
    useFakeTimers?: boolean
    fakeSystemTime?: Date
}) => {
    if (useFakeTimers) {
        vi.useFakeTimers()
    }

    const pickerInput = screen.getByTestId(/Date picker selectedDate-editTimeEntry/i)
    expect(pickerInput).toBeVisible()

    fireEvent.click(pickerInput)

    const targetDate = setDate(fakeSystemTime, day)

    // NOTE:
    // We avoid 'format()' here on purpose, because the date-picker implementation we use
    // uses the javascript date als value for their data attribute. This means that the month
    // is zero based instead of 1 based (e.g. meaning July === 6 instead of 7).
    const targetDateString = `${getYear(targetDate)}-${getMonth(targetDate)}-${day}`

    const dayButton = screen.getByRole('button', { name: `Choose ${targetDateString}` })
    fireEvent.click(dayButton)
}

Thanks @hypersoar for thinkig this through with me 🙂

Nathan•2y ago

Happy to kinda help!

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