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Mock IntersectionObserver in Jest setup

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shamoon 2025-07-03 12:03:18 -07:00
parent 3c1073aaef
commit 0c724e3590
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20
src-ui/setup-jest.ts
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@ -119,6 +119,26 @@ Object.defineProperty(window, 'location', {
value: { reload: jest.fn() },
})
if (typeof IntersectionObserver === 'undefined') {
class MockIntersectionObserver {
constructor(
public callback: IntersectionObserverCallback,
public options?: IntersectionObserverInit
) {}
observe = jest.fn()
unobserve = jest.fn()
disconnect = jest.fn()
takeRecords = jest.fn()
}
Object.defineProperty(window, 'IntersectionObserver', {
writable: true,
configurable: true,
value: MockIntersectionObserver,
})
}
HTMLCanvasElement.prototype.getContext = <
typeof HTMLCanvasElement.prototype.getContext
>jest.fn()