add test

apps/demos/testing/widgets/charts/Export.test.js

@@ -0,0 +1,25 @@
+import { createScreenshotsComparer } from 'devextreme-screenshot-comparer';
+import { Selector as $ } from 'testcafe';
+import { runManualTest } from '../../../utils/visual-tests/matrix-test-helper';
+import { testScreenshot } from '../../../utils/visual-tests/helpers/theme-utils';
+
+fixture('Charts.Export')
+  .page('http://localhost:8080/')
+  .before(async (ctx) => {
+    ctx.initialWindowSize = [900, 600];
+  });
+
+runManualTest('Charts', 'ExportCustomMarkup', ['jQuery', 'React', 'Vue', 'Angular'], (test) => {
+  test('Export', async (t) => {
+    let dialogAppeared = false;
+
+    await t.setNativeDialogHandler(() => {
+      dialogAppeared = true;
+      return false;
+    });
+
+    await t.click('dx-button[icon=export]');
+
+    await t.expect(dialogAppeared).ok('Save dialog should appear');
+  });
+});