From Jasmine to Jest conversion

Converts fileds_spec and mioq_api_spec from Jasmine to Jest

old_js_file_require_helper - sets function from file(s) to global so they can be accessed in Jest specs, requires files

app/assets/javascripts/miq_application.js

@@ -449,9 +449,9 @@ function miqResetSizeTimer() {
 }
 
 // Pass fields to server given a URL and fields in name/value pairs
-function miqPassFields(url, args) {
+window.miqPassFields = function (url, args) {
   return url + '?' + $.param(args);
-}
+};
 
 function miqChartLinkData(col, row, value, category, series, id, message) {
   // Create the context menu

app/javascript/spec/helpers/old_js_file_require_helper.js

@@ -0,0 +1,2 @@
+global.window = global;
+require('../../../assets/javascripts/miq_application.js');

spec/javascripts/fields_spec.js → app/javascript/spec/old_js/fields.spec.js

@@ -1,5 +1,7 @@
-describe('Pass fields  to server', function() {
-  it('returns url fields in name/value pairs', function() {
+require('../helpers/old_js_file_require_helper.js');
+
+describe('Pass fields  to server', () => {
+  it('returns url fields in name/value pairs', () => {
     var url = '/path/to/infinity';
     var args = {'foo': 'bar', 'lorem': 'ipsum'};
     expect(miqPassFields(url, args)).toEqual('/path/to/infinity?foo=bar&lorem=ipsum');

spec/javascripts/miq_api_spec.js → app/javascript/spec/old_js/miq_api.spec.js

@@ -1,8 +1,8 @@
-describe('miq_api.js', function() {
-  it("can base64 encode utf8 passwords", function(done) {
+describe('miq_api.js', () => {
+  it("can base64 encode utf8 passwords", done => {
     var getArgs;
 
-    spyOn(vanillaJsAPI, 'get').and.callFake(function(_url, args) {
+    jest.spyOn(vanillaJsAPI, 'get').mockImplementation(function(_url, args) {
       getArgs = args;
       return Promise.resolve({});
     });