Report page load asset size

Jenkinsfile

@@ -41,6 +41,7 @@ kibanaPipeline(timeoutMinutes: 155, checkPrChanges: true) {
             'xpack-ciGroup9': kibanaPipeline.xpackCiGroupProcess(9),
             'xpack-ciGroup10': kibanaPipeline.xpackCiGroupProcess(10),
             'xpack-accessibility': kibanaPipeline.functionalTestProcess('xpack-accessibility', './test/scripts/jenkins_xpack_accessibility.sh'),
+            'xpack-pageLoadMetrics': kibanaPipeline.functionalTestProcess('xpack-pageLoadMetrics', './test/scripts/jenkins_xpack_page_load_metrics.sh'),
             'xpack-securitySolutionCypress': { processNumber ->
               whenChanged(['x-pack/plugins/security_solution/', 'x-pack/test/security_solution_cypress/']) {
                 kibanaPipeline.functionalTestProcess('xpack-securitySolutionCypress', './test/scripts/jenkins_security_solution_cypress.sh')(processNumber)

packages/kbn-test/package.json

@@ -14,6 +14,7 @@
     "@kbn/babel-preset": "1.0.0",
     "@kbn/dev-utils": "1.0.0",
     "@types/parse-link-header": "^1.0.0",
+    "@types/puppeteer": "^3.0.0",
     "@types/strip-ansi": "^5.2.1",
     "@types/xml2js": "^0.4.5",
     "diff": "^4.0.1"
@@ -25,6 +26,7 @@
     "getopts": "^2.2.4",
     "glob": "^7.1.2",
     "parse-link-header": "^1.0.1",
+    "puppeteer": "^3.3.0",
     "strip-ansi": "^5.2.0",
     "rxjs": "^6.5.3",
     "tar-fs": "^1.16.3",

packages/kbn-test/src/index.ts

@@ -58,3 +58,5 @@ export { runFailedTestsReporterCli } from './failed_tests_reporter';
 export { makeJunitReportPath } from './junit_report_path';
 
 export { CI_PARALLEL_PROCESS_PREFIX } from './ci_parallel_process_prefix';
+
+export * from './page_load_metrics';

packages/kbn-test/src/page_load_metrics/capture_page_load_metrics.ts

@@ -0,0 +1,81 @@
+/*
+ * 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 { ToolingLog } from '@kbn/dev-utils';
+import { NavigationOptions, createUrl, navigateToApps } from './navigation';
+
+export async function capturePageLoadMetrics(log: ToolingLog, options: NavigationOptions) {
+  const responsesByPageView = await navigateToApps(log, options);
+
+  const assetSizeMeasurements = new Map<string, number[]>();
+
+  const numberOfPagesVisited = responsesByPageView.size;
+
+  for (const [, frameResponses] of responsesByPageView) {
+    for (const [, { url, dataLength }] of frameResponses) {
+      if (url.length === 0) {
+        throw new Error('navigateToApps(); failed to identify the url of the request');
+      }
+      if (assetSizeMeasurements.has(url)) {
+        assetSizeMeasurements.set(url, [dataLength].concat(assetSizeMeasurements.get(url) || []));
+      } else {
+        assetSizeMeasurements.set(url, [dataLength]);
+      }
+    }
+  }
+
+  return Array.from(assetSizeMeasurements.entries())
+    .map(([url, measurements]) => {
+      const baseUrl = createUrl('/', options.appConfig.url);
+      const relativeUrl = url
+        // remove the baseUrl (expect the trailing slash) to make url relative
+        .replace(baseUrl.slice(0, -1), '')
+        // strip the build number from asset urls
+        .replace(/^\/\d+\//, '/');
+      return [relativeUrl, measurements] as const;
+    })
+    .filter(([url, measurements]) => {
+      if (measurements.length !== numberOfPagesVisited) {
+        // ignore urls seen only on some pages
+        return false;
+      }
+
+      if (url.startsWith('data:')) {
+        // ignore data urls since they are already counted by other assets
+        return false;
+      }
+
+      if (url.startsWith('/api/') || url.startsWith('/internal/')) {
+        // ignore api requests since they don't have deterministic sizes
+        return false;
+      }
+
+      const allMetricsAreEqual = measurements.every((x, i) =>
+        i === 0 ? true : x === measurements[i - 1]
+      );
+      if (!allMetricsAreEqual) {
+        throw new Error(`measurements for url [${url}] are not equal [${measurements.join(',')}]`);
+      }
+
+      return true;
+    })
+    .map(([url, measurements]) => {
+      return { group: 'page load asset size', id: url, value: measurements[0] };
+    });
+}

packages/kbn-test/src/page_load_metrics/cli.ts

@@ -0,0 +1,90 @@
+/*
+ * 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 Url from 'url';
+
+import { run, createFlagError } from '@kbn/dev-utils';
+import { resolve, basename } from 'path';
+import { capturePageLoadMetrics } from './capture_page_load_metrics';
+
+const defaultScreenshotsDir = resolve(__dirname, 'screenshots');
+
+export function runPageLoadMetricsCli() {
+  run(
+    async ({ flags, log }) => {
+      const kibanaUrl = flags['kibana-url'];
+      if (!kibanaUrl || typeof kibanaUrl !== 'string') {
+        throw createFlagError('Expect --kibana-url to be a string');
+      }
+
+      const parsedUrl = Url.parse(kibanaUrl);
+
+      const [username, password] = parsedUrl.auth
+        ? parsedUrl.auth.split(':')
+        : [flags.username, flags.password];
+
+      if (typeof username !== 'string' || typeof password !== 'string') {
+        throw createFlagError(
+          'Mising username and/or password, either specify in --kibana-url or pass --username and --password'
+        );
+      }
+
+      const headless = !flags.head;
+
+      const screenshotsDir = flags.screenshotsDir || defaultScreenshotsDir;
+
+      if (typeof screenshotsDir !== 'string' || screenshotsDir === basename(screenshotsDir)) {
+        throw createFlagError('Expect screenshotsDir to be valid path string');
+      }
+
+      const metrics = await capturePageLoadMetrics(log, {
+        headless,
+        appConfig: {
+          url: kibanaUrl,
+          username,
+          password,
+        },
+        screenshotsDir,
+      });
+      for (const metric of metrics) {
+        log.info(`${metric.id}: ${metric.value}`);
+      }
+    },
+    {
+      description: `Loads several pages with Puppeteer to capture the size of assets`,
+      flags: {
+        string: ['kibana-url', 'username', 'password', 'screenshotsDir'],
+        boolean: ['head'],
+        default: {
+          username: 'elastic',
+          password: 'changeme',
+          debug: true,
+          screenshotsDir: defaultScreenshotsDir,
+        },
+        help: `
+          --kibana-url       Url for Kibana we should connect to, can include login info
+          --head             Run puppeteer with graphical user interface
+          --username         Set username, defaults to 'elastic'
+          --password         Set password, defaults to 'changeme'
+          --screenshotsDir   Set screenshots directory, defaults to '${defaultScreenshotsDir}'
+        `,
+      },
+    }
+  );
+}

packages/kbn-test/src/page_load_metrics/event.ts

@@ -0,0 +1,34 @@
+/*
+ * 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.
+ */
+
+export interface ResponseReceivedEvent {
+  frameId: string;
+  loaderId: string;
+  requestId: string;
+  response: Record<string, any>;
+  timestamp: number;
+  type: string;
+}
+
+export interface DataReceivedEvent {
+  encodedDataLength: number;
+  dataLength: number;
+  requestId: string;
+  timestamp: number;
+}

packages/kbn-test/src/page_load_metrics/index.ts

@@ -0,0 +1,21 @@
+/*
+ * 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.
+ */
+
+export * from './cli';
+export { capturePageLoadMetrics } from './capture_page_load_metrics';