rafaeleyng
42 lines
1.1 KiB
TypeScript
42 lines
1.1 KiB
TypeScript
import {renderHook} from '@testing-library/react-native'
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import {useAutoPagination} from './util'
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function query(overrides: Record<string, unknown> = {}) {
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return {
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data: {pageParams: [undefined]},
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isLoading: false,
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isRefetching: false,
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isFetchingNextPage: false,
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hasNextPage: true,
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fetchNextPage: jest.fn().mockResolvedValue(undefined),
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...overrides,
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}
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}
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describe('useAutoPagination', () => {
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it('fetches another page when visible items are missing', () => {
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const value = query()
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renderHook(() => useAutoPagination(value, 0, 10))
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expect(value.fetchNextPage).toHaveBeenCalledTimes(1)
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})
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it('stops when the requested number of items is visible', () => {
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const value = query()
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renderHook(() => useAutoPagination(value, 10, 10))
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expect(value.fetchNextPage).not.toHaveBeenCalled()
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})
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it('stops when the server repeats a cursor', () => {
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const value = query({data: {pageParams: [undefined, 'a', 'a']}})
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renderHook(() => useAutoPagination(value, 0, 10))
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expect(value.fetchNextPage).not.toHaveBeenCalled()
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})
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})
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