Navigation: add controlled unit test, use modern Testing Library features
#41668
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ciampo
added
[Type] Automated Testing
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Size Change: 0 B Total Size: 1.24 MB ℹ️ View Unchanged
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chad1008
reviewed
Jun 13, 2022
| await user.click( screen.getByRole( 'button', { name: 'Item 2' } ) ); | ||
| expect( | ||
| screen.getByRole( 'button', { name: 'Item 2' } ).parentElement | ||
| ).toHaveClass( 'is-active' ); |
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Would it be worthwhile to accompany this with a check that Item 1 no longer has the is-active class? I notice we do something similar up in the first test of the suite, essentially confirming that there's only one active item at a time.
If yes, there may be additional places to apply this to is-active tests elsewhere in the test case as well.
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Along those lines, I wonder if we should instead be checking for aria-current rather than the .is-active CSS. It would also make it easier to assert that no other links/buttons have an aria-current.
expect( screen.getByRole( 'link', { current: 'page' } ).toHaveTextContent( 'Item 2' );...aaaand I was confused a bit why this doesn't work, and apparently our RTL is quite outdated! The current filter landed in @testing-library/dom v8.2.0.
lena@Sieglinde gutenberg % npm ls @testing-library/dom
[email protected] /Users/lena/Documents/Work/Automattic/gutenberg
`-- @testing-library/[email protected]
`-- @testing-library/[email protected]
And unfortunately for us, the DOM Testing Library version bump landed in RTL v13, which drops support for React 17! So uh... never mind I guess 🙃
Side note: I bet we'll be experiencing more of these "wait why isn't this working?" moments, since the RTL docs aren't versioned. Maybe wp-components should have versioned docs at some point, too!
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Opened #41710 to try updating RTL-related dependencies to the latest version supporting React 17.
@testing-library/[email protected] seems to pull @testing-library/[email protected] , so maybe we're still able to add support for current 🤞
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Wow that was painless, didn't realize it was backported! Thank you for the quick version bump. Code looks super slick now 😎
mirka
approved these changes
Jun 14, 2022
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ciampo
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Jun 14, 2022
| @@ -266,14 +261,14 @@ describe( 'Navigation', () => { | |||
| screen.getByRole( 'heading', { name: 'Home' } ) | |||
| ).toBeInTheDocument(); | |||
| expect( | |||
| screen.getByRole( 'button', { name: 'Item 1' } ).parentElement | |||
| ).toHaveClass( 'is-active' ); | |||
| screen.getByRole( 'link', { current: 'page' } ) | |||
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Note: only "Item 1" and "Item 2" have role="link" since, in the example, their menu items are passed an href attribute.
The rest of the menu items are rendered as button as expected
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What?
In the context of #41612, this PR enhances the unit tests for the
Navigationexperimental componentWhy?
More tests can help in making sure that a refactor doesn't introduce breaking changes.
How?
@testing-library/user-eventinstead offireEventtoHaveTextContent,toBeInTheDocument,toHaveAttribute...)Testing Instructions
Code for the
Navigationunit tests looks good, unit tests pass