misc(proto): add screenEmulation to configSettings

core/lib/proto-preprocessor.js

@@ -35,6 +35,7 @@ function processForProto(lhr) {
       onlyCategories,
       channel,
       throttling,
+      screenEmulation,
       throttlingMethod} = reportJson.configSettings;
 
     // @ts-expect-error - intentionally only a subset of settings.
@@ -44,6 +45,7 @@ function processForProto(lhr) {
       onlyCategories,
       channel,
       throttling,
+      screenEmulation,
       throttlingMethod};
   }
 

core/test/lib/proto-preprocessor-test.js

@@ -20,32 +20,10 @@ describe('processing for proto', () => {
   });
 
   it('keeps only necessary configSettings', () => {
+    const samplejson = JSON.parse(JSON.stringify(sampleJson));
+    const {configSettings} = samplejson;
     const input = {
-      'configSettings': {
-        'output': [
-          'json',
-        ],
-        'maxWaitForLoad': 45000,
-        'throttlingMethod': 'devtools',
-        'throttling': {
-          'rttMs': 150,
-          'throughputKbps': 1638.4,
-          'requestLatencyMs': 562.5,
-          'downloadThroughputKbps': 1474.5600000000002,
-          'uploadThroughputKbps': 675,
-          'cpuSlowdownMultiplier': 4,
-        },
-        'gatherMode': false,
-        'disableStorageReset': false,
-        'formFactor': 'mobile',
-        'locale': 'en-US',
-        'blockedUrlPatterns': null,
-        'additionalTraceCategories': null,
-        'extraHeaders': null,
-        'onlyAudits': null,
-        'onlyCategories': null,
-        'skipAudits': null,
-      },
+      configSettings,
     };
     const expectation = {
       'configSettings': {
@@ -57,6 +35,27 @@ describe('processing for proto', () => {
     const output = processForProto(input);
 
     expect(output).toMatchObject(expectation);
+    expect(Object.keys(output.configSettings)).toMatchInlineSnapshot(`
+Array [
+  "formFactor",
+  "locale",
+  "onlyCategories",
+  "channel",
+  "throttling",
+  "screenEmulation",
+  "throttlingMethod",
+]
+`);
+    // This must be correctly populated for appropriate report metablock rendering
+    expect(output.configSettings.screenEmulation).toMatchInlineSnapshot(`
+Object {
+  "deviceScaleFactor": 1.75,
+  "disabled": false,
+  "height": 823,
+  "mobile": true,
+  "width": 412,
+}
+`);
   });
 
   it('cleans up default runtimeErrors', () => {

proto/lighthouse-result.proto

@@ -185,6 +185,22 @@ message LighthouseResult {
 
     // The method used to throttle the network.
     string throttling_method = 8;
+
+    message ScreenEmulation {
+      // Overriding width value in pixels (minimum 0, maximum 10000000). 0 disables the override.
+      double width = 1;
+      // Overriding height value in pixels (minimum 0, maximum 10000000). 0 disables the override.
+      double height = 2;
+      // Overriding device scale factor value. 0 disables the override.
+      double deviceScaleFactor = 3;
+      // Whether to emulate mobile device. This includes viewport meta tag, overlay scrollbars, text autosizing and more.
+      bool mobile = 4;
+      // Whether screen emulation is disabled. If true, the other emulation settings are ignored.
+      bool disabled = 5;
+    }
+
+    // Screen emulation properties (width, height, dpr, mobile viewport) to apply or an object of `{disabled: true}` if Lighthouse should avoid applying screen emulation. If either emulation is applied outside of Lighthouse, or it's being run on a mobile device, it typically should be set to disabled. For desktop, we recommend applying consistent desktop screen emulation.
+    ScreenEmulation screen_emulation = 9;
   }
 
   // The settings that were used to run this audit
@@ -633,4 +649,4 @@ message LhrEntity {
 
   // A list of URL origin strings that belong to this entity.
   repeated string origins = 6;
-}
+}