I have a (Jest) test to determine if a button exists:
it('renders a signup button', () => {
expect(sut.getByText('Sign up for free')).toBeDefined()
})
This test because there is both a button AND heading with "Sign up for free" text in the component.
A testid
could be added to the button, but I'd prefer to follow the react-testing-library principle of simulating user behaviour.
I feel it's legitimate a user would want to "click the button labelled 'Sign up for free'". In this situation, specifying the type of HTML element makes sense as a <button />
is a distinctive element to the user, as opposed to be <h2 />
vs <h3 />
.
How can I query for a button element labelled "Sign up for free"? For example can getByText()
be further limited by a query selector?
getByRole : This can be used to query every element that is exposed in the accessibility tree. With the name option you can filter the returned elements by their accessible name. This should be your top preference for just about everything.
it("should invoke an onClick handler when passed", () => { const onClick = jest. fn(); const { getByText } = render( <Button variant="standard" onClick={onClick}> Dummy Label </Button> ); Simulate. click(getByText("Dummy Label")); expect(onClick). toHaveBeenCalled(); }); });
To find elements by className in React testing library: Render a component and destructure the container object from the result. Use the getElementsByClassName() method on the container to find elements by class name.
The testing library is a family of packages that help you test UI components in a user-centric way. The more your test resembles the way your software is used, the more confidence they can give you.
I'm surprised no one here gives the most idiomatic answer yet. You can use getByRole()
and pass an accessible name. The accessible name is the text of the button or the value of aria-label
attribute.
It can be used to query a specific element if multiple elements with the same role are presented on the screen.
<button>Text Button</button>
screen.getByRole('button', {
name: /text button/i
})
<button aria-label='edit'>
<edit-icon />
</button>
screen.getByRole('button', {
name: /edit/i
})
You can pass options to your query to change its default behavior:
getByText('Sign up for free', { selector: 'button' })
You can find the full documentation here
You can do it like this:
getByText('Sign up for free').closest('button')
You can read more about closest
from here
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With