Appium Hybrid混合应用测试——Native切换WebView
- Appium Hybrid混合应用测试过程中,经常需要在Native和WebView之间进行切换;
1.切换至WEBVIEW操作;
for cons in driver.contexts:
if cons.lower().startswith("webview"):
driver._switch_to.context(cons)
break
# 或 cons = driver.contexts # 获取上下文列表
driver._switch_to.context(cons[-1])
2.切换至NATIVE_APP操作;
driver._switch_to.context("NATIVE_APP")
- 切换WebView时遇到两个问题,导致无法进行WebView切换:
【问题1 contexts只能获取NATIVE_APP,无法获取WEBVIEW】
使用uiautomatorviewer定位元素,显示class值为:android.webkit.WebView
但是driver.contexts只打印出了‘NATIVE_APP’;
>>> driver.contexts
['NATIVE_APP']
【解决方案】
需要开启webview远程调试功能, Android 4.4以上,需要在应用代码中增加一下代码段开启该功能 (可由开发人员增加后重新打包给测试):
修改Activity extends CordovaActivity,设置setWebContentsDebuggingEnabled(true);
public class MyActivity extends CordovaActivity {
CordovaWebView cwv;
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.init();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
this.appView.setWebContentsDebuggingEnabled(true);
}
// Set by <content src="index.html" /> in config.xml
loadUrl(launchUrl);
}
}
开启WebView远程调试功能后,重新打印contexts,成功!
>>> driver.contexts
['NATIVE_APP', 'WEBVIEW_com.sxxxxx.xxx']
【问题2 已经能够获取到WEBVIEW,但是无法切换到WEBVIEW】
查看Appium
# 发送contexts命令
> info: --> GET /wd/hub/session/c759114f-617f-461b-8341-91ca1d25515c/contexts {}
> info: [debug] Getting a list of available webviews
> info: [debug] executing cmd: D:\Android\sdk\platform-tools\adb.exe -s f825d6cd shell "cat /proc/net/unix"
> info: [debug] WEBVIEW_16429 mapped to pid 16429
> info: [debug] Getting process name for webview
> info: [debug] executing cmd: D:\Android\sdk\platform-tools\adb.exe -s f825d6cd shell "ps"
> info: [debug] Parsed pid: 16429 pkg: com.package.name
> info: [debug] from: u0_a256,16429,502,1975592,128716,ffffffff,00000000,S,com.package.name
> info: [debug] returning process name: com.package.name
> info: [debug] Available contexts:
> info: [debug] ["WEBVIEW_com.package.name"]
> info: [debug] Available contexts: NATIVE_APP,WEBVIEW_com.package.name
# 此处显示已成功将contexts响应给client,["NATIVE_APP","WEBVIEW_com.package.name"]
> info: [debug] Responding to client with success: {"status":0,"value":["NATIVE_APP","WEBVIEW_com.package.name"],"sessionId":"c759114f-617f-461b-8341-91ca1d25515c"}
> info: <-- GET /wd/hub/session/c759114f-617f-461b-8341-91ca1d25515c/contexts 200 395.699 ms - 112 {"status":0,"value":["NATIVE_APP","WEBVIEW_com.package.name"],"sessionId":"c759114f-617f-461b-8341-91ca1d25515c"}
> info: --> POST /wd/hub/session/c759114f-617f-461b-8341-91ca1d25515c/context {"sessionId":"c759114f-617f-461b-8341-91ca1d25515c","name":"WEBVIEW_com.package.name"}
> info: [debug] Getting a list of available webviews
> info: [debug] executing cmd: D:\Android\sdk\platform-tools\adb.exe -s f825d6cd shell "cat /proc/net/unix"
> info: [debug] WEBVIEW_16429 mapped to pid 16429
> info: [debug] Getting process name for webview
> info: [debug] executing cmd: D:\Android\sdk\platform-tools\adb.exe -s f825d6cd shell "ps"
> info: [debug] Parsed pid: 16429 pkg: com.package.name
> info: [debug] from: u0_a256,16429,502,1975592,128716,ffffffff,00000000,S,com.package.name
> info: [debug] returning process name: com.package.name
> info: [debug] Available contexts: NATIVE_APP,WEBVIEW_com.package.name
> info: [debug] ["WEBVIEW_com.package.name"]
> info: [debug] Available contexts: NATIVE_APP,WEBVIEW_com.package.name
# 开始调用启动Chromedriver
> info: [debug] Connecting to chrome-backed webview
> info: Chromedriver: Changed state to 'starting'
> info: Chromedriver: Set chromedriver binary as: D:\Appium\node_modules\appium\node_modules\appium-chromedriver\chromedriver\win\chromedriver.exe
> info: Chromedriver: Killing any old chromedrivers, running: FOR /F "usebackq tokens=5" %a in (`netstat -nao ^| findstr /R /C:"9515 "`) do (FOR /F "usebackq" %b in (`TASKLIST /FI "PID eq %a" ^| findstr /I chromedriver.exe`) do (IF NOT %b=="" TASKKILL /F /PID %a))
> info: Chromedriver: No old chromedrivers seemed to exist
> info: Chromedriver: Spawning chromedriver with: D:\Appium\node_modules\appium\node_modules\appium-chromedriver\chromedriver\win\chromedriver.exe --url-base=wd/hub --port=9515
> info: Chromedriver: [STDOUT] Starting ChromeDriver 2.18.343845 (73dd713ba7fbfb73cbb514e62641d8c96a94682a) on port 9515
> Only local connections are allowed.
> info: JSONWP Proxy: Proxying [GET /status] to [GET http://127.0.0.1:9515/wd/hub/status] with no body
> info: JSONWP Proxy: Got response with status 200: "{\"sessionId\":\"\",\"status\":0,\"value\":{\"build\":{\"version\":\"alpha\"},\"os\":{\"arch\":\"x86_64\",\"name\":\"Windows NT\",\"version\":\"10.0\"}}}"
> info: JSONWP Proxy: Proxying [POST /session] to [POST http://127.0.0.1:9515/wd/hub/session] with body: {"desiredCapabilities":{"chromeOptions":{"androidPackage":"com.package.name","androidUseRunningApp":true,"androidDeviceSerial":"f825d6cd"}}}
> info: JSONWP Proxy: Got response with status 200: {"sessionId":"448c057dd8e679591a99e539a6485d45","status":13,"value":{"message":"unknown error: Device f825d6cd is not online\n (Driver info: chromedriver=2.18.343845 (73dd713ba7fbfb73cbb514e62641d...
> info: JSONWP Proxy: Proxying [POST /session] to [POST http://127.0.0.1:9515/wd/hub/session] with body: {"desiredCapabilities":{"chromeOptions":{"androidPackage":"com.package.name","androidUseRunningApp":true,"androidDeviceSerial":"f825d6cd"}}}
> info: JSONWP Proxy: Got response with status 200: {"sessionId":"a2c6259b846570c32fa66f07b8e663ba","status":13,"value":{"message":"unknown error: Device f825d6cd is not online\n (Driver info: chromedriver=2.18.343845 (73dd713ba7fbfb73cbb514e62641d...
> info: JSONWP Proxy: Proxying [POST /session] to [POST http://127.0.0.1:9515/wd/hub/session] with body: {"desiredCapabilities":{"chromeOptions":{"androidPackage":"com.package.name","androidUseRunningApp":true,"androidDeviceSerial":"f825d6cd"}}}
> info: JSONWP Proxy: Got response with status 200: {"sessionId":"44a889342086cf78ea724e48b0958960","status":13,"value":{"message":"unknown error: Device f825d6cd is not online\n (Driver info: chromedriver=2.18.343845 (73dd713ba7fbfb73cbb514e62641d...
> info: JSONWP Proxy: Proxying [POST /session] to [POST http://127.0.0.1:9515/wd/hub/session] with body: {"desiredCapabilities":{"chromeOptions":{"androidPackage":"com.package.name","androidUseRunningApp":true,"androidDeviceSerial":"f825d6cd"}}}
> info: JSONWP Proxy: Got response with status 200: {"sessionId":"66c261de9b5c1919eee22072feb2fa2e","status":13,"value":{"message":"unknown error: Chrome version must be >= 43.0.2357.0\n (Driver info: chromedriver=2.18.343845 (73dd713ba7fbfb73cbb51...
# Chromedriver开始报错!
> error: Chromedriver: Chromedriver exited unexpectedly with code null, signal SIGTERM
> info: Chromedriver: Changed state to 'stopped'
> warn: Chromedriver for context WEBVIEW_com.package.name stopped unexpectedly
> warn: Chromedriver quit unexpectedly, but it wasn't the active context, ignoring
# 此处报了重要的错误信息:Chrome version must be >= 43.0.2357.0,chromedriver=2.18.343845
> error: Chromedriver: Error: An unknown server-side error occurred while processing the command. (Original error: unknown error: Chrome version must be >= 43.0.2357.0
> (Driver info: chromedriver=2.18.343845 (73dd713ba7fbfb73cbb514e62641d8c96a94682a),platform=Windows NT 10.0 x86_64))
> at JWProxy.command$ (lib/proxy.js:133:15)
> at tryCatch (D:\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\regenerator\runtime.js:67:40)
> at GeneratorFunctionPrototype.invoke [as _invoke] (D:\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\regenerator\runtime.js:315:22)
> at GeneratorFunctionPrototype.prototype.(anonymous function) [as next] (D:\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\regenerator\runtime.js:100:21)
> at GeneratorFunctionPrototype.invoke (D:\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\regenerator\runtime.js:136:37)
> at bound (domain.js:284:14)
> at GeneratorFunctionPrototype.runBound (domain.js:297:12)
> at run (D:\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\node_modules\core-js\library\modules\es6.promise.js:89:39)
> at D:\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\node_modules\core-js\library\modules\es6.promise.js:100:28
> at flush (D:\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\node_modules\core-js\library\modules\$.microtask.js:17:13)
> at process._tickDomainCallback (node.js:381:11)
> { [Error: An unknown server-side error occurred while processing the command. (Original error: unknown error: Chrome version must be >= 43.0.2357.0
> (Driver info: chromedriver=2.18.343845 (73dd713ba7fbfb73cbb514e62641d8c96a94682a),platform=Windows NT 10.0 x86_64))]
> status: 13,
> value: { message: 'unknown error: Chrome version must be >= 43.0.2357.0\n (Driver info: chromedriver=2.18.343845 (73dd713ba7fbfb73cbb514e62641d8c96a94682a),platform=Windows NT 10.0 x86_64)' },
> httpCode: 200 }
webview控件使用的是Android自带的chrome内核,那么来看看手机自带的chrome内核版本吧;
设置>应用程序管理>全部,查找到Android System WebView应用,查看详情,显示版本号:42.0.2311.138
由此可知,Android系统自带的chrom内核版本过低,造成报错;
【解决方案】
知道了报错原因,那么来进行问题解决吧。
方案1:
根据报错信息要求的版本,下载更新Android System WebView;
方案2:
从报错信息得知Appium使用的chromedriver=2.18.343845
查看ChromeDriver官网,得知ChromeDriver2.18支持Chrome 44+
So,我们可以更新下载对应版本的ChromeDriver.exe替换D:\Appium\node_modules\appium\node_modules\appium-chromedriver\chromedriver\win\chromedriver.exe
注:
双击执行“chromedriver.exe”,可以查看版本driver版本号;
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