GoogleChrome · adamraine · Aug 16, 2022 · Jun 22, 2022 · Jun 22, 2022 · Jul 6, 2022
diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
@@ -46,6 +46,7 @@ jobs:
 
     - run: yarn install --frozen-lockfile --network-timeout 1000000
     - run: yarn build-report
+    - run: yarn reset-link
 
     # Run pptr tests using ToT Chrome instead of stable default.
     - name: Define ToT chrome path

diff --git a/lighthouse-cli/test/fixtures/flow/index.html b/lighthouse-cli/test/fixtures/flow/index.html
@@ -0,0 +1,22 @@
+<!--
+ * Copyright 2022 The Lighthouse Authors. 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.
+-->
+<html>
+  <body>
+    <div id="list"></div>
+    <h1>Landing page for our user flows!</h1>
+    <button id="add-item">Add item</button>
+    <a id="link" href="/flow/next.html">Link to new page!</a>
+  </body>
+  <script>
+    const button = document.getElementById('add-item');
+    button.onclick = async () => {
+      const list = document.getElementById('list');
+      const item = document.createElement('h3');
+      item.textContent = 'New item!';
+      list.append(item);
+    }
+  </script>
+</html>
diff --git a/lighthouse-cli/test/fixtures/flow/next.html b/lighthouse-cli/test/fixtures/flow/next.html
@@ -0,0 +1,15 @@
+<!--
+ * Copyright 2022 The Lighthouse Authors. 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.
+-->
+<html>
+  <body>
+    <h1>New page after clicking the link!</h1>
+    <details id="content">
+      <summary>Hidden content here:</summary>
+      Hello there!
+    </details>
+  </body>
+</html>
+
diff --git a/lighthouse-core/fraggle-rock/replay/stringify-extension.js b/lighthouse-core/fraggle-rock/replay/stringify-extension.js
@@ -0,0 +1,104 @@
+/**
+ * @license Copyright 2022 The Lighthouse Authors. 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';
+
+import {PuppeteerStringifyExtension} from '@puppeteer/replay';
+
+/**
+ * @param {import('@puppeteer/replay').Schema.Step} step
+ * @return {boolean}
+ */
+function isNavigationStep(step) {
+  return Boolean(
+    step.type === 'navigate' ||
+    step.assertedEvents?.some(event => event.type === 'navigation')
+  );
+}
+
+class LighthouseStringifyExtension extends PuppeteerStringifyExtension {
+  #isProcessingTimespan = false;
+
+  /**
+   * @param {Parameters<PuppeteerStringifyExtension['beforeAllSteps']>} args
+   */
+  async beforeAllSteps(...args) {
+    const [out, flow] = args;
+    out.appendLine(`const fs = require('fs');`);
+
+    let isMobile = true;
+    for (const step of flow.steps) {
+      if (step.type !== 'setViewport') continue;
+      isMobile = step.isMobile;
+    }
+
+    await super.beforeAllSteps(...args);
+
+    const configContext = {
+      settingsOverrides: {
+        screenEmulation: {
+          disabled: true,
+        },
+      },
+    };
+    out.appendLine(`const configContext = ${JSON.stringify(configContext)}`);
+    if (isMobile) {
+      out.appendLine(`const config = undefined;`);
+    } else {
+      // eslint-disable-next-line max-len
+      out.appendLine(`const config = (await import('lighthouse/lighthouse-core/config/desktop-config.js')).default;`);
+    }
+
+    out.appendLine(`const lhApi = await import('lighthouse/lighthouse-core/fraggle-rock/api.js');`);
+    // eslint-disable-next-line max-len
+    out.appendLine(`const lhFlow = await lhApi.startFlow(page, {name: ${JSON.stringify(flow.title)}, config, configContext});`);
+  }
+
+  /**
+   * @param {Parameters<PuppeteerStringifyExtension['stringifyStep']>} args
+   */
+  async stringifyStep(...args) {
+    const [out, step] = args;
+
+    if (step.type === 'setViewport') {
+      await super.stringifyStep(...args);
+      return;
+    }
+
+    const isNavigation = isNavigationStep(step);
+
+    if (isNavigation) {
+      if (this.#isProcessingTimespan) {
+        out.appendLine(`await lhFlow.endTimespan();`);
+        this.#isProcessingTimespan = false;
+      }
+      out.appendLine(`await lhFlow.startNavigation();`);
+    } else if (!this.#isProcessingTimespan) {
+      out.appendLine(`await lhFlow.startTimespan();`);
+      this.#isProcessingTimespan = true;
+    }
+
+    await super.stringifyStep(...args);
+
+    if (isNavigation) {
+      out.appendLine(`await lhFlow.endNavigation();`);
+    }
+  }
+
+  /**
+   * @param {Parameters<PuppeteerStringifyExtension['afterAllSteps']>} args
+   */
+  async afterAllSteps(...args) {
+    const [out] = args;
+    if (this.#isProcessingTimespan) {
+      out.appendLine(`await lhFlow.endTimespan();`);
+    }
+    out.appendLine(`const lhFlowReport = await lhFlow.generateReport();`);
+    out.appendLine(`fs.writeFileSync(__dirname + '/flow.report.html', lhFlowReport)`);
+    await super.afterAllSteps(...args);
+  }
+}
+
+export default LighthouseStringifyExtension;
diff --git a/lighthouse-core/test/fixtures/fraggle-rock/replay/desktop-test-flow.json b/lighthouse-core/test/fixtures/fraggle-rock/replay/desktop-test-flow.json
@@ -0,0 +1,102 @@
+{
+  "title": "Test Flow on Desktop",
+  "steps": [
+    {
+      "type": "setViewport",
+      "width": 757,
+      "height": 988,
+      "deviceScaleFactor": 1,
+      "isMobile": false,
+      "hasTouch": false,
+      "isLandscape": false
+    },
+    {
+      "type": "navigate",
+      "url": "http://localhost:10200/flow/index.html",
+      "assertedEvents": [
+        {
+          "type": "navigation",
+          "url": "http://localhost:10200/flow/index.html",
+          "title": ""
+        }
+      ]
+    },
+    {
+      "type": "click",
+      "target": "main",
+      "selectors": [
+        [
+          "aria/Add item"
+        ],
+        [
+          "#add-item"
+        ]
+      ],
+      "offsetY": 13.5625,
+      "offsetX": 61
+    },
+    {
+      "type": "click",
+      "target": "main",
+      "selectors": [
+        [
+          "aria/Add item"
+        ],
+        [
+          "#add-item"
+        ]
+      ],
+      "offsetY": 4.125,
+      "offsetX": 42
+    },
+    {
+      "type": "click",
+      "target": "main",
+      "selectors": [
+        [
+          "aria/Add item"
+        ],
+        [
+          "#add-item"
+        ]
+      ],
+      "offsetY": 8.40625,
+      "offsetX": 50
+    },
+    {
+      "type": "click",
+      "target": "main",
+      "selectors": [
+        [
+          "aria/Link to new page!"
+        ],
+        [
+          "#link"
+        ]
+      ],
+      "offsetY": 3.6875,
+      "offsetX": 53.390625,
+      "assertedEvents": [
+        {
+          "type": "navigation",
+          "url": "http://localhost:10200/flow/next.html",
+          "title": ""
+        }
+      ]
+    },
+    {
+      "type": "click",
+      "target": "main",
+      "selectors": [
+        [
+          "aria/Hidden content here:"
+        ],
+        [
+          "#content > summary"
+        ]
+      ],
+      "offsetY": 10.5625,
+      "offsetX": 6
+    }
+  ]
+}
diff --git a/lighthouse-core/test/fixtures/fraggle-rock/replay/mobile-test-flow.json b/lighthouse-core/test/fixtures/fraggle-rock/replay/mobile-test-flow.json
@@ -0,0 +1,102 @@
+{
+  "title": "Test Flow on Mobile",
+  "steps": [
+    {
+      "type": "setViewport",
+      "width": 300,
+      "height": 600,
+      "deviceScaleFactor": 3,
+      "isMobile": true,
+      "hasTouch": true,
+      "isLandscape": false
+    },
+    {
+      "type": "navigate",
+      "url": "http://localhost:10200/flow/index.html",
+      "assertedEvents": [
+        {
+          "type": "navigation",
+          "url": "http://localhost:10200/flow/index.html",
+          "title": ""
+        }
+      ]
+    },
+    {
+      "type": "click",
+      "target": "main",
+      "selectors": [
+        [
+          "aria/Add item"
+        ],
+        [
+          "#add-item"
+        ]
+      ],
+      "offsetY": 13.5625,
+      "offsetX": 61
+    },
+    {
+      "type": "click",
+      "target": "main",
+      "selectors": [
+        [
+          "aria/Add item"
+        ],
+        [
+          "#add-item"
+        ]
+      ],
+      "offsetY": 4.125,
+      "offsetX": 42
+    },
+    {
+      "type": "click",
+      "target": "main",
+      "selectors": [
+        [
+          "aria/Add item"
+        ],
+        [
+          "#add-item"
+        ]
+      ],
+      "offsetY": 8.40625,
+      "offsetX": 50
+    },
+    {
+      "type": "click",
+      "target": "main",
+      "selectors": [
+        [
+          "aria/Link to new page!"
+        ],
+        [
+          "#link"
+        ]
+      ],
+      "offsetY": 3.6875,
+      "offsetX": 53.390625,
+      "assertedEvents": [
+        {
+          "type": "navigation",
+          "url": "http://localhost:10200/flow/next.html",
+          "title": ""
+        }
+      ]
+    },
+    {
+      "type": "click",
+      "target": "main",
+      "selectors": [
+        [
+          "aria/Hidden content here:"
+        ],
+        [
+          "#content > summary"
+        ]
+      ],
+      "offsetY": 10.5625,
+      "offsetX": 6
+    }
+  ]
+}