How to use the react-intersection-observer/test-utils.mockAllIsIntersecting function in react-intersection-observer
To help you get started, we’ve selected a few react-intersection-observer examples, based on popular ways it is used in public projects.
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maapteh / graphql-modules-app / packages / app / src / modules / product / product.spec.tsx View on Github 
it('renders correctly', async () => {
const id = '9200000111963040';
const testId = 'product-details';
const { container, queryByTestId, findByText } = render(
);
mockAllIsIntersecting(true);
expect(queryByTestId(testId)).toBe(null);
await findByText(/De Ghost Recon/);
expect(queryByTestId(testId)).toBeDefined();
// generic contract
expect(container).toMatchSnapshot();
});
});react-intersection-observer
Monitor if a component is inside the viewport, using IntersectionObserver API
