This repo has been created to demostrate issue that happens when using svelte-testing-library, that seems to have something to do with components that use slots not firing events correctly?
i'm using the Button component from carbon-components-svelte with the as prop which renders the components with a slot to demonstrate this. The component defintion is here - https://github.com/carbon-design-system/carbon-components-svelte/blob/master/src/Button/Button.svelte
You can see in https://github.com/PClmnt/svelte-testing-library-issue/blob/900a6ac2af49a8f7d6ebc2477ecab5efc28c68ae/src/lib/ConditionalTest.svelte that there is a conditional that is trigged on the Button click.
However, the else part of the conditional is never triggered when using fireEvent.click within https://github.com/PClmnt/svelte-testing-library-issue/blob/900a6ac2af49a8f7d6ebc2477ecab5efc28c68ae/src/lib/test/ConditionalTest.spec.js and therefore the test fails as it cannot see the text within the conditional.
To see this happening clone the repo and
yarn
yarn test
and you will see the output showing that the conditional isn't showing.
ConditionalTest
✕ Navigates past the first selection (1047 ms)
● ConditionalTest › Navigates past the first selection
Unable to find an element with the text: /example text?/i. This could be because the text is broken up by multiple elements. In this case, you can provide a function for your text matcher to make your matcher more flexible.
<body>
<div>
<section>
<div>
<span>
test
</span>
</div>
</section>
</div>
</body>
11 | await fireEvent.click(button)
12 | debug()
> 13 | expect(await screen.findByText(/example text?/i)).toBeInTheDocument()
| ^
14 | })
15 | })