workaround getComputedStyle issues in all jest tests (#14737)

app/javascript/organization/__tests__/OrganizationPicker.test.jsx

@@ -15,11 +15,6 @@ const organizations = [
 ];
 
 describe('<OrganizationPicker />', () => {
-  beforeAll(() => {
-    // TODO: Remove this once https://github.com/nickcolley/jest-axe/issues/147 is fixed.
-    window.getComputedStyle = () => {};
-  });
-
   it('should have no a11y violations', async () => {
     const { container } = render(
       <OrganizationPicker

testSetup.js

@@ -4,6 +4,10 @@ import './app/assets/javascripts/lib/xss';
 
 global.setImmediate = global.setTimeout;
 
+// TODO: Remove this once https://github.com/nickcolley/jest-axe/issues/147 is fixed.
+const { getComputedStyle } = window;
+window.getComputedStyle = (elt) => getComputedStyle(elt);
+
 process.on('unhandledRejection', (error) => {
   // Errors thrown here are typically fetch responses that have not been mocked.
   throw error;