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test(query-core/mutationObserver): add test for skipping 'notify' when 'setOptions' is called with same options #10098

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test(query-core/mutationObserver): add test for skipping 'notify' when 'setOptions' is called with same options #10098

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23 changes: 23 additions & 0 deletions packages/query-core/src/__tests__/mutationObserver.test.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -476,4 +476,27 @@ describe('mutationObserver', () => {
unsubscribe()
})
})

test('should not notify cache when setOptions is called with same options', () => {
const mutationObserver = new MutationObserver(queryClient, {
mutationFn: (text: string) => Promise.resolve(text),
})

const notifySpy = vi.spyOn(queryClient.getMutationCache(), 'notify')

const unsubscribe = mutationObserver.subscribe(() => undefined)

notifySpy.mockClear()

// Call setOptions with the same options
mutationObserver.setOptions({
mutationFn: mutationObserver.options.mutationFn,
})

expect(notifySpy).not.toHaveBeenCalledWith(
expect.objectContaining({ type: 'observerOptionsUpdated' }),
)

unsubscribe()
})
})
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