fix a broken test, add new one for opt_in_message

src/legacy/core_plugins/telemetry/public/components/opt_in_message.test.tsx

@@ -0,0 +1,29 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import React from 'react';
+import { shallowWithIntl } from 'test_utils/enzyme_helpers';
+import { OptInMessage } from './opt_in_message';
+
+describe('OptInMessage', () => {
+  it('renders as expected', () => {
+    expect(
+      shallowWithIntl(<OptInMessage fetchTelemetry={jest.fn(async () => [])} />)
+    ).toMatchSnapshot();
+  });
+});