Fix popperjs related tests

Author: Travis CI

__mocks__/@popperjs/core.ts

@@ -0,0 +1,15 @@
+const mock = () => {
+    const PopperJS = jest.requireActual('@popperjs/core');
+    return {
+        placements: PopperJS.placements,
+        destroy: () => {},
+        scheduleUpdate: () => {},
+        forceUpdate: () => {},
+        render: function (this: any) {
+            return this.$options._renderChildren;
+        },
+    };
+};
+
+export default mock;
+export { mock as createPopper };

test-setup.js

@@ -6,26 +6,6 @@ require('raf/polyfill');
  */
 require('mutationobserver-shim');
 
-/**
- * Mock PopperJS
- *
- * When using mount(), material-ui calls Popper.js, which is not compatible with JSDom
- * And causes UnhandledPromiseRejectionWarning: TypeError: document.createRange is not a function
- *
- * @see https://github.com/FezVrasta/popper.js/issues/478
- */
-jest.mock('@popperjs/core', () => {
-    const PopperJS = jest.requireActual('@popperjs/core');
-    return {
-        placements: PopperJS.placements,
-        destroy: () => {},
-        scheduleUpdate: () => {},
-        render: function (this) {
-            return this.$options._renderChildren;
-        },
-    };
-});
-
 // Ignore warnings about act()
 // See https://github.com/testing-library/react-testing-library/issues/281,
 // https://github.com/facebook/react/issues/14769