fix: Improve visibility of message to enable "Remote Debugging via USB" with web-ext run -t firefox-android

src/extension-runners/firefox-android.js

@@ -582,14 +582,6 @@ export class FirefoxAndroidExtensionRunner {
     }
 
     try {
-      const msg = (
-        `Waiting for ${selectedFirefoxApk} Remote Debugging Server...` +
-        '\nMake sure to enable "Remote Debugging via USB" ' +
-        'from Settings -> Developer Tools if it is not yet enabled.'
-      );
-
-      log.info(`\n${msg}\n`);
-
       // Got a debugger socket file to connect.
       this.selectedRDPSocketFile = (
         await adbUtils.discoverRDPUnixSocket(

src/util/adb.js

@@ -353,8 +353,14 @@ export default class ADBUtils {
     let rdpUnixSockets = [];
 
     const discoveryStartedAt = Date.now();
+    const msg = (
+      `Waiting for ${apk} Remote Debugging Server...` +
+      '\nMake sure to enable "Remote Debugging via USB" ' +
+      'from Settings -> Developer Tools if it is not yet enabled.'
+    );
 
     while (rdpUnixSockets.length === 0) {
+      log.info(msg);
       if (this.userAbortDiscovery) {
         throw new UsageError(
           'Exiting Firefox Remote Debugging socket discovery on user request'

tests/unit/test-extension-runners/test.firefox-android.js

@@ -1029,27 +1029,6 @@ describe('util/extension-runners/firefox-android', () => {
       consoleStream.stopCapturing();
     });
 
-    it(
-      'does tell user to enable Remote Debugging when running Fenix',
-      async () => {
-        const {params, fakeADBUtils} = prepareSelectedDeviceAndAPKParams();
-        params.firefoxApk = 'org.mozilla.fenix.nightly';
-        fakeADBUtils.getAndroidVersionNumber = async () => 23;
-
-        consoleStream.startCapturing();
-        const runner = new FirefoxAndroidExtensionRunner(params);
-        await runner.run();
-
-        assert.match(
-          consoleStream.capturedMessages.join('\n'),
-          /Make sure to enable "Remote Debugging via USB"/
-        );
-
-        consoleStream.flushCapturedLogs();
-        consoleStream.stopCapturing();
-      }
-    );
-
   });
 
 });

tests/unit/test-util/test.adb.js

@@ -14,6 +14,9 @@ import ADBUtils, {
   ARTIFACTS_DIR_PREFIX,
   DEVICE_DIR_BASE,
 } from '../../../src/util/adb';
+import {
+  consoleStream, // instance is imported to inspect logged messages
+} from '../../../src/util/logger';
 
 const fakeADBPackageList = `
 package:org.mozilla.fennec
@@ -1129,6 +1132,40 @@ describe('utils/adb', () => {
       );
     });
 
+    it('reminds the user to enable remote_debugging', async () => {
+      const adb = getFakeADBKit({
+        adbClient: {
+          shell: sinon.spy(() => Promise.resolve('')),
+        },
+        adbkitUtil: {
+          readAll: sinon.spy(() => {
+            return Promise.resolve(Buffer.from(''));
+          }),
+        },
+      });
+      const adbUtils = new ADBUtils({adb});
+
+      consoleStream.flushCapturedLogs();
+      consoleStream.makeVerbose();
+      consoleStream.startCapturing();
+
+      const promise = adbUtils.discoverRDPUnixSocket(
+        'device1', 'org.mozilla.firefox_mybuild', {
+          maxDiscoveryTime: 50, retryInterval: 10,
+        }
+      );
+      await assert.isRejected(promise, WebExtError);
+
+      const {capturedMessages} = consoleStream;
+      const foundMessage = capturedMessages.find((message) =>
+        message.includes('Make sure to enable "Remote Debugging via USB'));
+
+      consoleStream.stopCapturing();
+
+      assert.ok(foundMessage);
+      assert.ok(foundMessage && foundMessage.includes('[info]'));
+    });
+
     it('rejects a WebExtError if more than one RDP socket have been found',
        async () => {
          const adb = getFakeADBKit({