How to use the apollo-link-http.createHttpLink.mock function in apollo-link-http
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apollographql / apollo-link / packages / apollo-link-batch-http / src / __tests__ / batchHttpLink.ts View on Github 
createHttpLink: jest.fn(() => ({ request })),
};
});
const createHttpLink = require('apollo-link-http').createHttpLink;
const LocalScopedLink = require('../batchHttpLink').BatchHttpLink;
const reduceFetchOptions = () => {};
const batch = new LocalScopedLink({
batchInterval: 20,
batchMax: 20,
reduceFetchOptions,
});
const { batchOptions } = createHttpLink.mock.calls[0][0];
expect(batchOptions.batchInterval).toBe(20);
expect(batchOptions.batchMax).toBe(20);
expect(batchOptions.reduceFetchOptions).toEqual(reduceFetchOptions);
const { request } = createHttpLink();
execute(batch, operation);
expect(request).toBeCalled();
});
});apollo-link-http
HTTP transport layer for GraphQL
