How to use the useFakeXMLHttpRequest function from sinon

index.md?plain=1

GitHub: will3/sinon

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```javascript
var xhr, requests;

before(function () {
    xhr = sinon.useFakeXMLHttpRequest();
    requests = [];
    xhr.onCreate = function (req) { requests.push(req); };
});

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+ 3 other calls in file

truman.js

GitHub: holidayextras/truman

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.then((fixtures) => {
  // Want this available in memory.
  storageFixtures = fixtures

  // Sinon's fake XHR logs extra request info we'll need/want for our fixtures:
  sinon.useFakeXMLHttpRequest()

  // Always call through as we're recording and want to make the request:
  window.XMLHttpRequest.useFilters = true
  window.XMLHttpRequest.addFilter(() => true) // true = allow, false = stub

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unexpectedMxhr.js

GitHub: unexpectedjs/unexpected-mxhr

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expect.exportAssertion(
  '<any> with xhr mocked out <object|array> <assertion>',
  function(expect, subject, requestDescriptions) {
    expect.errorMode = 'nested';
    var mockedXhr = sinon.useFakeXMLHttpRequest();

    if (!Array.isArray(requestDescriptions)) {
      requestDescriptions = [requestDescriptions];
    } else {

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signin.test.js

GitHub: cse112-sp20/CSE112-Neon

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const uid = 'odkSxashOmg9QeyRL2cRs00Jke12';

fs.readFile(`${__dirname}/../../app/signin.html`, 'utf8', async (err, data) => {
  describe('#signin functions', () => {
    before( () => {
      global.XMLHttpRequest = sinon.useFakeXMLHttpRequest();
      guidSpy = sinon.spy(module, 'guidVal');
      signInSpy = sinon.spy(module, 'signIn');
    });
    describe('#guidVal', () => {

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spotify-web-api.spec.js

GitHub: heelago/similarly

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describe('Basic tests', function () {
  var that = this;
  beforeEach(function () {
    that.requests = [];
    that.xhr = sinon.useFakeXMLHttpRequest();
    that.xhr.onCreate = function (xhr) {
      that.requests.push(xhr);
    };
  });

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testHarness.js

GitHub: sabit/kibana

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  });
});


before(function () {
  sinon.useFakeXMLHttpRequest();
});


/*** Kick off mocha, called at the end of test entry files ***/

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