[test] Smoke test

packages/grid/x-grid/src/XGrid.test.tsx

@@ -105,6 +105,15 @@ describe('<XGrid />', () => {
         container.firstChild.firstChild.firstChild,
       );
     });
+
+    it('should not fail after scheduled tasks are run', async () => {
+      render(
+        <div style={{ width: 300, height: 300 }}>
+          <XGrid {...defaultProps} />
+        </div>,
+      );
+      await sleep(0);
+    });
   });
 
   describe('keyboard', () => {

test/karma.conf.js

@@ -56,6 +56,7 @@ module.exports = function setKarmaConfig(config) {
           'process.env': {
             NODE_ENV: JSON.stringify('test'),
             CI: JSON.stringify(process.env.CI),
+            KARMA: JSON.stringify(true),
           },
         }),
       ],

test/karma.tests.js

@@ -1,7 +1,55 @@
+/* eslint-env mocha */
 import './utils/init';
-import consoleError from './utils/consoleError';
+import { createMochaHooks } from '@material-ui/monorepo/test/utils/mochaHooks';
 
-consoleError();
+const mochaHooks = createMochaHooks(window.Mocha);
+
+before(function beforeAllHook() {
+  mochaHooks.beforeAll.forEach((mochaHook) => {
+    mochaHook.call(this);
+  });
+});
+
+after(function afterAllHook() {
+  mochaHooks.afterAll.forEach((mochaHook) => {
+    mochaHook.call(this);
+  });
+});
+
+beforeEach(function beforeEachHook() {
+  mochaHooks.beforeEach.forEach((mochaHook) => {
+    mochaHook.call(this);
+  });
+});
+
+afterEach(function afterEachHook() {
+  mochaHooks.afterEach.forEach((mochaHook) => {
+    mochaHook.call(this);
+  });
+});
+
+// Ensure that uncaught exceptions between tests result in the tests failing.
+// This works around an issue with mocha / karma-mocha, see
+// https://github.com/karma-runner/karma-mocha/issues/227
+let pendingError = null;
+let pendingErrorNotice = null;
+
+window.addEventListener('error', event => {
+  pendingError = event.error;
+  pendingErrorNotice = 'An uncaught exception was thrown between tests';
+});
+
+window.addEventListener('unhandledrejection', event => {
+  pendingError = event.reason;
+  pendingErrorNotice = 'An uncaught promise rejection occurred between tests';
+});
+
+afterEach(() => {
+  if (pendingError) {
+    console.error(pendingErrorNotice);
+    throw pendingError;
+  }
+});
 
 const packagesContext = require.context('../packages', true, /\.test\.tsx$/);
 packagesContext.keys().forEach(packagesContext);

yarn.lock

@@ -2735,8 +2735,8 @@
   resolved "https://github.com/mui-org/material-ui.git#3c078f2f6943976fc4d3ed5d886bbfa0f391e4a2"
 
 "@material-ui/monorepo@https://github.com/mui-org/material-ui.git#next":
-  version "5.0.0-alpha.13"
-  resolved "https://github.com/mui-org/material-ui.git#13f3e9d8db81b40e1b08f43e4d45e37f3926c37d"
+  version "5.0.0-alpha.15"
+  resolved "https://github.com/mui-org/material-ui.git#c500fc3faf873142b9124319cebf728dd9a12cc5"
 
 "@material-ui/styles@^4.10.0":
   version "4.10.0"