【发布时间】：2013-04-04 08:56:54
【问题描述】：
多年来，我一直在成功使用 RC。我决定切换到 Remote Webdriver 以获得所有这些新好处。 首先，我想尝试一个基本场景。 1. 打开 Google.com 2. 在搜索框中输入“Selenium”。
我使用以下命令启动独立服务器
java -jar selenium-server-standalone-2.31.0.jar -port 4450
然后我执行包含以下行的 python 测试脚本。
from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
import time
caps = webdriver.DesiredCapabilities.FIREFOX
driver = webdriver.Remote(desired_capabilities=caps,command_executor='http://localhost:4450/wd/hub')
driver.get("http://www.google.com")
time.sleep(5)
driver.find_element_by_id("gbqfb").send_keys("selenium")
driver.quit()
我可以看到 google.com 已打开，但未在搜索框中输入“selenium”。在独立服务器日志中，我得到以下异常。
配置：Windows 7 Professional-32bit。 Selenium-server-standalone-2.31 Python 2.7.3 Firefox 17。
我想知道我在这里缺少什么？任何帮助将不胜感激。谢谢！
C:\Users\engin\Downloads>java -jar selenium-server-standalone-2.31.0.jar -port 4
450
Nis 04, 2013 11:24:35 AM org.openqa.grid.selenium.GridLauncher main
INFO: Launching a standalone server
11:24:36.180 INFO - Java: Oracle Corporation 23.7-b01
11:24:36.180 INFO - OS: Windows 7 6.1 x86
11:24:36.195 INFO - v2.31.0, with Core v2.31.0. Built from revision 1bd294d
11:24:36.351 INFO - RemoteWebDriver instances should connect to: http://127.0.0.
1:4450/wd/hub
11:24:36.367 INFO - Version Jetty/5.1.x
11:24:36.367 INFO - Started HttpContext[/selenium-server/driver,/selenium-server
/driver]
11:24:36.367 INFO - Started HttpContext[/selenium-server,/selenium-server]
11:24:36.367 INFO - Started HttpContext[/,/]
11:24:36.398 INFO - Started org.openqa.jetty.jetty.servlet.ServletHandler@b1656f
11:24:36.398 INFO - Started HttpContext[/wd,/wd]
11:24:36.398 INFO - Started SocketListener on 0.0.0.0:4450
11:24:36.398 INFO - Started org.openqa.jetty.jetty.Server@18facfb
11:25:42.012 INFO - Executing: [new session: {platform=ANY, javascriptEnabled=tr
ue, browserName=firefox, version=}] at URL: /session)
11:25:48.987 INFO - Done: /session
11:25:49.003 INFO - Executing: org.openqa.selenium.remote.server.handler.GetSess
ionCapabilities@19e774d at URL: /session/3ff2660f-0a08-420d-b3df-eb5b699e4a6b)
11:25:49.003 INFO - Done: /session/3ff2660f-0a08-420d-b3df-eb5b699e4a6b
11:25:49.018 INFO - Executing: [get: http://www.google.com] at URL: /session/3ff
2660f-0a08-420d-b3df-eb5b699e4a6b/url)
11:25:51.436 INFO - Done: /session/3ff2660f-0a08-420d-b3df-eb5b699e4a6b/url
11:25:56.444 INFO - Executing: [find element: By.id: gbqfb] at URL: /session/3ff
2660f-0a08-420d-b3df-eb5b699e4a6b/element)
11:25:56.537 INFO - Done: /session/3ff2660f-0a08-420d-b3df-eb5b699e4a6b/element
11:25:56.537 INFO - Executing: [send keys: null null, [s, e, l, e, n, i, u, m]]
at URL: /session/3ff2660f-0a08-420d-b3df-eb5b699e4a6b/element/0/value)
11:25:56.537 WARN - Exception thrown
java.lang.NullPointerException
at org.openqa.selenium.remote.server.handler.SendKeys.call(SendKeys.java
:49)
at org.openqa.selenium.remote.server.handler.SendKeys.call(SendKeys.java
:1)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at org.openqa.selenium.remote.server.DefaultSession$1.run(DefaultSession
.java:169)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
11:25:56.553 WARN - Exception: null
【问题讨论】：
-
您确定定位器“gbqfb”是用于文本输入而不是任何其他元素吗？
-
我确定定位器是正确的，因为如果我故意提供不正确的定位器，我会得到 NoSuchelementException : Unable to locate the element
-
看到这一行：
11:25:56.537 INFO - Executing: [send keys: null null, [s, e, l, e, n, i, u, m]]- 前两个键似乎是空的......但我不知道如何修复它...... -
@AbhijeetVaikar 元素的类型也是正确的。我刚刚尝试使用 Selenium IDE 查找功能。（id=gbqfq）。搜索框呈黄色高亮。有了这个 id，我仍然得到空指针异常。还尝试打开 www.altavista.com 并在搜索框中输入一些文本（id=yschsp）..没有区别..
标签： python windows selenium remotewebdriver