Remove unused polyfills

package.json

@@ -108,7 +108,6 @@
     "eslint-plugin-react-hooks": "^4.0.7",
     "expect-puppeteer": "^4.3.0",
     "format-util": "^1.0.5",
-    "formdata-polyfill": "^3.0.20",
     "fs-extra": "^9.0.0",
     "glob": "^7.1.2",
     "glob-gitignore": "^1.0.11",

test/karma.tests.js

@@ -1,6 +1,3 @@
-// https://github.com/airbnb/enzyme/issues/1792
-import 'core-js/modules/es6.array.from';
-import 'formdata-polyfill';
 import './utils/init';
 
 const integrationContext = require.context(

test/utils/createClientRender.js

@@ -5,7 +5,6 @@ import {
   act,
   buildQueries,
   cleanup,
-  createEvent,
   fireEvent as rtlFireEvent,
   queries,
   render as testingLibraryRender,
@@ -157,10 +156,8 @@ export function createClientRender(globalOptions = {}) {
   };
 }
 
-const fireEvent = Object.assign(rtlFireEvent, {
-  // polyfill event.key(Code) for chrome 49 and edge 15 (supported in Material-UI v4)
-  // for user-interactions react does the polyfilling but manually created
-  // events don't have this luxury
+const fireEvent = {
+  ...rtlFireEvent,
   keyDown(element, options = {}) {
     // `element` shouldn't be `document` but we catch this later anyway
     const document = element.ownerDocument || element;
@@ -182,21 +179,7 @@ const fireEvent = Object.assign(rtlFireEvent, {
       throw error;
     }
 
-    const event = createEvent.keyDown(element, options);
-    Object.defineProperty(event, 'key', {
-      get() {
-        return options.key || '';
-      },
-    });
-    if (options.keyCode !== undefined && event.keyCode === 0) {
-      Object.defineProperty(event, 'keyCode', {
-        get() {
-          return options.keyCode;
-        },
-      });
-    }
-
-    rtlFireEvent(element, event);
+    rtlFireEvent.keyDown(element, options);
   },
   keyUp(element, options = {}) {
     // `element` shouldn't be `document` but we catch this later anyway
@@ -218,23 +201,10 @@ const fireEvent = Object.assign(rtlFireEvent, {
         .join('\n');
       throw error;
     }
-    const event = createEvent.keyUp(element, options);
-    Object.defineProperty(event, 'key', {
-      get() {
-        return options.key || '';
-      },
-    });
-    if (options.keyCode !== undefined && event.keyCode === 0) {
-      Object.defineProperty(event, 'keyCode', {
-        get() {
-          return options.keyCode;
-        },
-      });
-    }
 
-    rtlFireEvent(element, event);
+    rtlFireEvent.keyUp(element, options);
   },
-});
+};
 
 export * from '@testing-library/react/pure';
 export { act, cleanup, fireEvent };

yarn.lock

@@ -7831,11 +7831,6 @@ format-util@^1.0.5:
   resolved "https://registry.yarnpkg.com/format-util/-/format-util-1.0.5.tgz#1ffb450c8a03e7bccffe40643180918cc297d271"
   integrity sha512-varLbTj0e0yVyRpqQhuWV+8hlePAgaoFRhNFj50BNjEIrw1/DphHSObtqwskVCPWNgzwPoQrZAbfa/SBiicNeg==
 
-formdata-polyfill@^3.0.20:
-  version "3.0.20"
-  resolved "https://registry.yarnpkg.com/formdata-polyfill/-/formdata-polyfill-3.0.20.tgz#d6319db8efc5cf4bb2da27856c2b902be63be1c6"
-  integrity sha512-TAaxIEwTBdoH1TWndtUH1T0/GisUHwmOKcV5hjkR/iTatHBJSOHb563FP86Lra5nXo3iNdhK7HPwMl5Ihg71pg==
-
 forwarded@~0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/forwarded/-/forwarded-0.1.2.tgz#98c23dab1175657b8c0573e8ceccd91b0ff18c84"