add test

src/core/public/kbn_bootstrap.test.mocks.ts

@@ -0,0 +1,50 @@
+/*
+ * 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 { applicationServiceMock } from './application/application_service.mock';
+import { fatalErrorsServiceMock } from './fatal_errors/fatal_errors_service.mock';
+export const fatalErrorMock = fatalErrorsServiceMock.createSetupContract();
+export const coreSystemMock = {
+  setup: jest.fn().mockResolvedValue({
+    fatalErrors: fatalErrorMock,
+  }),
+  start: jest.fn().mockResolvedValue({
+    application: applicationServiceMock.createInternalStartContract(),
+  }),
+};
+jest.doMock('./core_system', () => ({
+  CoreSystem: jest.fn().mockImplementation(() => coreSystemMock),
+}));
+
+export const apmSystem = {
+  setup: jest.fn().mockResolvedValue(undefined),
+  start: jest.fn().mockResolvedValue(undefined),
+};
+export const ApmSystemConstructor = jest.fn().mockImplementation(() => apmSystem);
+jest.doMock('./apm_system', () => ({
+  ApmSystem: ApmSystemConstructor,
+}));
+
+export const i18nLoad = jest.fn().mockResolvedValue(undefined);
+jest.doMock('@kbn/i18n', () => ({
+  i18n: {
+    ...jest.requireActual('@kbn/i18n').i18n,
+    load: i18nLoad,
+  },
+}));

src/core/public/kbn_bootstrap.test.ts

@@ -0,0 +1,54 @@
+/*
+ * 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 { apmSystem, fatalErrorMock, i18nLoad } from './kbn_bootstrap.test.mocks';
+import { __kbnBootstrap__ } from './';
+
+describe('kbn_bootstrap', () => {
+  beforeAll(() => {
+    const metadata = {
+      i18n: { translationsUrl: 'http://localhost' },
+      vars: { apmConfig: null },
+    };
+    // eslint-disable-next-line no-unsanitized/property
+    document.body.innerHTML = `<kbn-injected-metadata data=${JSON.stringify(metadata)}>
+</kbn-injected-metadata>`;
+  });
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('does not report a fatal error if apm load fails', async () => {
+    apmSystem.setup.mockRejectedValueOnce(new Error('reason'));
+    const consoleSpy = jest.spyOn(console, 'warn').mockImplementationOnce(() => undefined);
+
+    await __kbnBootstrap__();
+
+    expect(fatalErrorMock.add).toHaveBeenCalledTimes(0);
+    expect(consoleSpy).toHaveBeenCalledTimes(1);
+  });
+
+  it('reports a fatal error if i18n load fails', async () => {
+    i18nLoad.mockRejectedValueOnce(new Error('reason'));
+
+    await __kbnBootstrap__();
+
+    expect(fatalErrorMock.add).toHaveBeenCalledTimes(1);
+  });
+});

src/core/public/kbn_bootstrap.ts

@@ -27,15 +27,16 @@ export async function __kbnBootstrap__() {
     document.querySelector('kbn-injected-metadata')!.getAttribute('data')!
   );
 
+  let i18nError: Error | undefined;
   const apmSystem = new ApmSystem(injectedMetadata.vars.apmConfig);
-  await apmSystem.setup();
 
-  let i18nError: Error | undefined;
-  try {
-    await i18n.load(injectedMetadata.i18n.translationsUrl);
-  } catch (error) {
-    i18nError = error;
-  }
+  await Promise.all([
+    // eslint-disable-next-line no-console
+    apmSystem.setup().catch(console.warn),
+    i18n.load(injectedMetadata.i18n.translationsUrl).catch((error) => {
+      i18nError = error;
+    }),
+  ]);
 
   const coreSystem = new CoreSystem({
     injectedMetadata,