test(core): add copy paste e2e tests

[sjelfull]

Description

This adds e2e component tests for verifying that copy & pasting works, both via keyboard shortcuts and field actions.

This currently tests object inputs in the interest of time, but we could extend it to cover all inputs later.

Testing clipboard in playwright is tricky, so we have added a fixture that mocks the clipboard. This retains any copied value only on the same page, so it will reset if you change it to navigate away to another document.

The fixture might make sense to lift to the @sanity/test package if we feel its generic enough.

What to review

• That the scenarios makes sense

[vercel]

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[github-actions]

No changes to documentation

[github-actions]

Component Testing Report Updated Jun 25, 2024 5:44 PM (UTC)

File	Status	Duration	Passed	Skipped	Failed
comments/CommentInput.spec.tsx	✅ Passed (Inspect)	42s	15	0	0
formBuilder/ArrayInput.spec.tsx	✅ Passed (Inspect)	9s	3	0	0
formBuilder/inputs/PortableText/Annotations.spec.tsx	✅ Passed (Inspect)	30s	6	0	0
formBuilder/inputs/PortableText/copyPaste/CopyPaste.spec.tsx	✅ Passed (Inspect)	36s	11	7	0
formBuilder/inputs/PortableText/copyPaste/CopyPasteFields.spec.tsx	❌ Failed (Inspect)	23s	7	4	1
formBuilder/inputs/PortableText/Decorators.spec.tsx	✅ Passed (Inspect)	17s	6	0	0
formBuilder/inputs/PortableText/DisableFocusAndUnset.spec.tsx	✅ Passed (Inspect)	10s	3	0	0
formBuilder/inputs/PortableText/DragAndDrop.spec.tsx	✅ Passed (Inspect)	52s	1	0	0
formBuilder/inputs/PortableText/FocusTracking.spec.tsx	✅ Passed (Inspect)	44s	15	0	0
formBuilder/inputs/PortableText/Input.spec.tsx	✅ Passed (Inspect)	1m 44s	18	0	0
formBuilder/inputs/PortableText/ObjectBlock.spec.tsx	✅ Passed (Inspect)	1m 15s	18	0	0
formBuilder/inputs/PortableText/PresenceCursors.spec.tsx	✅ Passed (Inspect)	9s	3	9	0
formBuilder/inputs/PortableText/RangeDecoration.spec.tsx	✅ Passed (Inspect)	25s	9	0	0
formBuilder/inputs/PortableText/Styles.spec.tsx	✅ Passed (Inspect)	18s	6	0	0
formBuilder/inputs/PortableText/Toolbar.spec.tsx	✅ Passed (Inspect)	35s	12	0	0