GoogleChrome · paulirish · Mar 21, 2018 · Mar 17, 2018 · Mar 17, 2018 · Mar 17, 2018
diff --git a/.gitignore b/.gitignore
@@ -24,6 +24,9 @@ last-run-results.html
 *.report.pretty
 *.artifacts.log
 
+!lighthouse-core/test/results/artifacts/*.trace.json
+!lighthouse-core/test/results/artifacts/*.devtoolslog.json
+
 latest-run
 
 closure-error.log

diff --git a/lighthouse-cli/test/fixtures/static-server.js b/lighthouse-cli/test/fixtures/static-server.js
@@ -3,6 +3,7 @@
  * Licensed 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.
  */
+// @ts-nocheck
 'use strict';
 
 /* eslint-disable no-console */
@@ -122,6 +123,16 @@ const serverForOffline = http.createServer(requestHandler);
 serverForOnline.on('error', e => console.error(e.code, e));
 serverForOffline.on('error', e => console.error(e.code, e));
 
-// Listen
-serverForOnline.listen(10200, 'localhost');
-serverForOffline.listen(10503, 'localhost');
+
+// If called via `node static-server.js` then start listening, otherwise, just expose the servers
+if (require.main === module) {
+  // Start listening
+  serverForOnline.listen(10200, 'localhost');
+  serverForOffline.listen(10503, 'localhost');
+} else {
+  module.exports = {
+    server: serverForOnline,
+    serverForOffline,
+  };
+}
+
diff --git a/lighthouse-core/scripts/update-report-fixtures.js b/lighthouse-core/scripts/update-report-fixtures.js
@@ -0,0 +1,29 @@
+/**
+ * @license Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed 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.
+ */
+'use strict';
+
+const cli = require('../../lighthouse-cli/run');
+
+const {server} = require('../../lighthouse-cli/test/fixtures/static-server');
+
+/**
+ * Update the report artifacts
+ */
+async function update() {
+  // get an available port
+  server.listen(0, 'localhost');
+  const port = await new Promise(res => server.on('listening', () => res(server.address().port)));
+
+  const url = `http://localhost:${port}/dobetterweb/dbw_tester.html`;
+  const flags = {
+    gatherMode: 'lighthouse-core/test/results/artifacts',
+  };
+  // @ts-ignore Remove when we fix Flags typing
+  await cli.runLighthouse(url, flags, undefined);
+  await new Promise(res => server.close(res));
+}
+
+update();
diff --git a/lighthouse-core/test/results/artifacts/artifacts.json b/lighthouse-core/test/results/artifacts/artifacts.json
diff --git a/lighthouse-core/test/results/artifacts/defaultPass.devtoolslog.json b/lighthouse-core/test/results/artifacts/defaultPass.devtoolslog.json
diff --git a/lighthouse-core/test/results/artifacts/defaultPass.trace.json b/lighthouse-core/test/results/artifacts/defaultPass.trace.json
diff --git a/lighthouse-core/test/results/artifacts/offlinePass.devtoolslog.json b/lighthouse-core/test/results/artifacts/offlinePass.devtoolslog.json
diff --git a/lighthouse-core/test/results/artifacts/redirectPass.devtoolslog.json b/lighthouse-core/test/results/artifacts/redirectPass.devtoolslog.json
@@ -0,0 +1 @@
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Safari/537.36","X-DevTools-Emulate-Network-Conditions-Client-Id":"A36E31E517F452A18C51AA32F4163A8C"},"mixedContentType":"none","initialPriority":"VeryHigh","referrerPolicy":"no-referrer-when-downgrade"},"timestamp":185617.176299,"wallTime":1519974796.775882,"initiator":{"type":"other"},"type":"Document","frameId":"A36E31E517F452A18C51AA32F4163A8C"}},{"method":"Network.responseReceived","params":{"requestId":"B153A75C1DEF181D4A3B369563BFF20C","loaderId":"B153A75C1DEF181D4A3B369563BFF20C","timestamp":185617.179082,"type":"Document","response":{"url":"http://localhost:10200/dobetterweb/dbw_tester.html","status":200,"statusText":"OK","headers":{"Date":"Fri, 02 Mar 2018 07:13:16 GMT","Connection":"keep-alive","Transfer-Encoding":"chunked"},"headersText":"HTTP/1.1 200 OK\r\nDate: Fri, 02 Mar 2018 07:13:16 GMT\r\nConnection: keep-alive\r\nTransfer-Encoding: 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