从WebDriver 2.53.1升级到3.5.2

Question

我有一个使用WebDriver 2.53.1的测试套件，现在我尝试升级到3.5.2。 我添加了以下代码：

System.setProperty("webdriver.firefox.bin", C:\\Portable\\firefox.exe);
System.setProperty("webdriver.gecko.driver", "C:\\geckodriver.exe");
WebDriver driver = new FirefoxDriver();
driver.navigate().to(url);

当我执行测试时，我看到以下内容：

  

1503575087525 geckodriver INFO geckodriver 0.18.0   1503575087525 geckodriver INFO在127.0.0.1:20041上收听   1503575088303 geckodriver :: marionette INFO启动浏览器   C：/Portable/firefox.exe with args [＆＃34; -marionette＆＃34;]

我在给定端口上获得此JSON输出：

{"value":{"error":"unknown command","message":"GET / did not match a known command","stacktrace":"stack backtrace:\n   0:           0x4bb74f - <no info>\n   1:           0x4bbea9 - <no info>\n   2:           0x43ce8d - <no info>\n   3:           0x4319fd - <no info>\n   4:           0x425ca5 - <no info>\n   5:           0x407eba - <no info>\n   6:           0x6d95b9 - <no info>\n   7:           0x417655 - <no info>\n   8:           0x6d38b3 - <no info>\n   9:     0x7ffdddfa13d2 - BaseThreadInitThunk"}}

它会在浏览器中打开欢迎页面，并且不会转到给定的URL。