How to use the cross-fetch.mockImplementation function in cross-fetch
To help you get started, we’ve selected a few cross-fetch examples, based on popular ways it is used in public projects.
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okta / okta-auth-js / test / util / util.js View on Github 
} else {
allPairs.unshift(pair);
}
}
function done() {
if (allPairs.length !== 0) {
throw new Error('Not all staged XHRs were executed');
}
}
if (pairs) {
setNextPair(pairs);
}
fetch.mockImplementation(function (url, args) {
var pair = allPairs.shift();
if (!pair) {
throw new Error('We are making a request that we have not anticipated.');
}
if (pair.request.withCredentials !== false) {
// Make sure every request is attaching cookies
expect(args.credentials).toEqual('include');
}
if (pair.request) {
expect(pair.request.uri).toEqual(url);
if (pair.request.headers) {
expect(pair.request.headers).toEqual(args.headers);
}} else {
allPairs.unshift(pair);
}
}
function done() {
if (allPairs.length !== 0) {
throw new Error('Not all staged XHRs were executed');
}
}
if (pairs) {
setNextPair(pairs);
}
fetch.mockImplementation(function (url, args) {
var pair = allPairs.shift();
if (!pair) {
throw new Error('We are making a request that we have not anticipated.');
}
if (pair.request.withCredentials !== false) {
// Make sure every request is attaching cookies
expect(args.credentials).toEqual('include');
}
if (pair.request) {
expect(pair.request.uri).toEqual(url);
if (pair.request.headers) {
expect(pair.request.headers).toEqual(args.headers);
}cross-fetch
Universal WHATWG Fetch API for Node, Browsers and React Native
