bugfix: prevent this error when running WebDriver without Bidi protocol: 'Error: Failed to execute WebDriver Bidi command "sessionSubscribe"' (#5095)

Author: ngraf

lib/helper/WebDriver.js

@@ -491,7 +491,7 @@ class WebDriver extends Helper {
     }
     config.capabilities.browserName = config.browser || config.capabilities.browserName
 
-    // WebDriver Bidi Protocol. Default: false
+    // WebDriver Bidi Protocol. Default: true
     config.capabilities.webSocketUrl = config.bidiProtocol ?? config.capabilities.webSocketUrl ?? true
 
     config.capabilities.browserVersion = config.browserVersion || config.capabilities.browserVersion
@@ -629,8 +629,11 @@ class WebDriver extends Helper {
 
     this.browser.on('dialog', () => {})
 
-    await this.browser.sessionSubscribe({ events: ['log.entryAdded'] })
-    this.browser.on('log.entryAdded', logEvents)
+    // Check for Bidi, because "sessionSubscribe" is an exclusive Bidi protocol feature. Otherwise, error will be thrown.
+    if (this.browser.capabilities && this.browser.capabilities.webSocketUrl) {
+      await this.browser.sessionSubscribe({ events: ['log.entryAdded'] })
+      this.browser.on('log.entryAdded', logEvents)
+    }
 
     return this.browser
   }