Test cases using Chai and mocha

Question

I have following function:

function showAllUrlsData(inputUrl, inputUrlPromise) {
      fetch(inputUrl)
        .then(function(response) {
            return response.text()
        })
        .then(function(result) {
          var inputObjectData =  htmlResult(result);
          inputObjData(inputObjectData, inputUrl ,inputUrlPromise);
      });
    }

how to write the test cases using fetch? I'm very new to this test case framework,any inputs will be really helpful.

Answer 1

You can use fetch-mock . Install with

npm i -D fetch-mock

Then use it like this to mock a fetch:

var fetchMock = require('fetch-mock');
var makeRequest = require('./make-request');

// Mock the fetch() global to always return the same value for GET
// requests to all URLs.
fetchMock.get('*', { hello: 'world' });

makeRequest().then(function(data) {
  console.log('got data', data);
});

// Unmock.
fetchMock.reset();

For more information here's the documentation