[英]Error: Unable to capture screenshot - Android hybrid app using Protractor and Appium
我正在使用Protractor進行測試自動化。 我使用量角器(茉莉花)和Appium完美地測試了我的混合Android應用程序。 但是我無法使browser.takeScreenshot()
函數正常工作。 所有其他測試都可以像單擊按鈕或類似的東西完美地工作。 我創建了一個新的空白應用程序,以排除導致該問題的插件。 沒有Cordova插件可以阻止屏幕截圖功能,並且我能夠使用android設備本身進行屏幕截圖。
我嘗試了這個StackOverflow答案(還有更多),但是沒有成功(似乎沒有人遇到過這個問題)。
我還使用了protractor-jasmin2-screenshot-reporter來排除,我截屏的代碼無法正常工作,但得到的結果相同。 有趣的是,當我使用browserName:'Chrome'並讓測試在設備上打開Chrome並調用www.google.com並讓我的代碼截圖時,它可以正常工作。 僅在我的混合應用程序中,無法截屏。
( browser.takeScreenshot().then(function (png) {...
代碼來自官方量角器頁面和其他可靠的來源)。
exports.config = {
seleniumAddress : 'http://localhost:4723/wd/hub',
// Reference: https://github.com/appium/sample-code/blob/master/sample-code/examples/node/helpers/caps.js
capabilities : {
// needed by local appium
platformVersion : '',
platformName : '',
deviceName : '',
// needed by protractor
browserName : '',
autoWebview : true,
// CHANGE THIS TO YOUR ABSOLUTE PATH OR SET IT IN APPIUM CLIENT
app : 'C:/Projekte/WifiWizardTestApp/platforms/android/build/outputs/apk/android-debug.apk',
newCommandTimeout : 60
},
//needed for local appium
baseUrl : 'http://localhost:8080',
//configuring wd in onPrepare
//wdBridge helps to bridge wd driver with other selenium clients
//See https://github.com/sebv/wd-bridge/blob/master/README.md
onPrepare : function () {
var wd = require('wd');
var protractor = require('protractor');
var wdBridge = require('wd-bridge')(protractor, wd);
wdBridge.initFromProtractor(exports.config);
},
};
var fs = require('fs');
describe('Testing the browse state', function () {
it('should be able to take a screenshot', function (done) {
browser.sleep(2000);
browser.takeScreenshot().then(function (png) {
console.log('browser.takeScreenshot()');
var stream = fs.createWriteStream('screenshot.png');
stream.write(new Buffer(png, 'base64'));
stream.end();
done();
});
});
it('should be able to take an other screenshot', function () {
browser.takeScreenshot().then(function (png) {
console.log('browser.takeScreenshot()');
var stream = fs.createWriteStream('screenshot2.png');
stream.write(new Buffer(png, 'base64'));
stream.end();
});
});
});
C:\Projekte\WifiWizardTestApp>protractor protractor.config.js --specs tests/browse.spec.js
[09:27:44] I/hosted - Using the selenium server at http://localhost:4723/wd/hub
[09:27:44] I/launcher - Running 1 instances of WebDriver
Started
A Jasmine spec timed out. Resetting the WebDriver Control Flow.
FA Jasmine spec timed out. Resetting the WebDriver Control Flow.
F
Failures:
1) Testing the browse state should be able to take a screenshot
Message:
Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.
Stack:
Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.
at ontimeout (timers.js:365:14)
at tryOnTimeout (timers.js:237:5)
at Timer.listOnTimeout (timers.js:207:5)
2) Testing the browse state should be able to take an other screenshot
Message:
Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.
Stack:
Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.
at ontimeout (timers.js:365:14)
at tryOnTimeout (timers.js:237:5)
at Timer.listOnTimeout (timers.js:207:5)
2 specs, 2 failures
Finished in 60.04 seconds
C:\Projekte\WifiWizardTestApp>protractor protractor.config.js --specs tests/browse.spec.js
[15:15:49] I/hosted - Using the selenium server at http://localhost:4723/wd/hub
[15:15:49] I/launcher - Running 1 instances of WebDriver
Started
FF
Failures:
1) Testing the browse state should be able to take a screenshot
Message:
Failed: unknown error: unhandled inspector error: {"code":-32603,"message":"Unable to capture screenshot"}
(Session info: webview=30.0.0.0)
(Driver info: chromedriver=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9),platform=Windows NT 10.0.10586 x86_64)
Stack:
WebDriverError: unknown error: unhandled inspector error: {"code":-32603,"message":"Unable to capture screenshot"}
(Session info: webview=30.0.0.0)
(Driver info: chromedriver=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9),platform=Windows NT 10.0.10586 x86_64)
at WebDriverError (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\error.js:27:5)
at Object.checkLegacyResponse (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\error.js:505:15)
at parseHttpResponse (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\http.js:509:13)
at doSend.then.response (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\http.js:440:13)
at process._tickCallback (internal/process/next_tick.js:103:7)
From: Task: WebDriver.takeScreenshot()
at WebDriver.schedule (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver.js:816:17)
at WebDriver.takeScreenshot (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver.js:1092:17)
at ProtractorBrowser.to.(anonymous function) [as takeScreenshot] (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\lib\browser.ts:94:25)
at Object.<anonymous> (C:\Projekte\WifiWizardTestApp\tests\browse.spec.js:14:17)
at C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\jasminewd2\index.js:98:15
at new ManagedPromise (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\promise.js:1067:7)
at controlFlowExecute (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\jasminewd2\index.js:87:18)
at TaskQueue.execute_ (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\promise.js:2970:14)
at TaskQueue.executeNext_ (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\promise.js:2953:27)
at asyncRun (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\promise.js:2813:27)
From: Task: Run it("should be able to take a screenshot") in control flow
at Object.<anonymous> (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\jasminewd2\index.js:86:14)
From asynchronous test:
Error
at Suite.<anonymous> (C:\Projekte\WifiWizardTestApp\tests\browse.spec.js:8:5)
at Object.<anonymous> (C:\Projekte\WifiWizardTestApp\tests\browse.spec.js:4:1)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
2) Testing the browse state should be able to take an other screenshot
Message:
Failed: unknown error: unhandled inspector error: {"code":-32603,"message":"Unable to capture screenshot"}
(Session info: webview=30.0.0.0)
(Driver info: chromedriver=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9),platform=Windows NT 10.0.10586 x86_64)
Stack:
WebDriverError: unknown error: unhandled inspector error: {"code":-32603,"message":"Unable to capture screenshot"}
(Session info: webview=30.0.0.0)
(Driver info: chromedriver=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9),platform=Windows NT 10.0.10586 x86_64)
at WebDriverError (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\error.js:27:5)
at Object.checkLegacyResponse (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\error.js:505:15)
at parseHttpResponse (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\http.js:509:13)
at doSend.then.response (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\http.js:440:13)
at process._tickCallback (internal/process/next_tick.js:103:7)
From: Task: WebDriver.takeScreenshot()
at WebDriver.schedule (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver.js:816:17)
at WebDriver.takeScreenshot (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver.js:1092:17)
at ProtractorBrowser.to.(anonymous function) [as takeScreenshot] (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\lib\browser.ts:94:25)
at Object.<anonymous> (C:\Projekte\WifiWizardTestApp\tests\browse.spec.js:26:17)
at C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\jasminewd2\index.js:102:25
at new ManagedPromise (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\promise.js:1067:7)
at controlFlowExecute (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\jasminewd2\index.js:87:18)
at TaskQueue.execute_ (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\promise.js:2970:14)
at TaskQueue.executeNext_ (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\promise.js:2953:27)
at asyncRun (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\promise.js:2860:25)
From: Task: Run it("should be able to take an other screenshot") in control flow
at Object.<anonymous> (C:\Users\mkaiser\AppData\Roaming\npm\node_modules\protractor\node_modules\jasminewd2\index.js:86:14)
From asynchronous test:
Error
at Suite.<anonymous> (C:\Projekte\WifiWizardTestApp\tests\browse.spec.js:24:5)
at Object.<anonymous> (C:\Projekte\WifiWizardTestApp\tests\browse.spec.js:4:1)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
2 specs, 2 failures
Finished in 2.258 seconds
[15:17:49] I/launcher - 0 instance(s) of WebDriver still running
[15:17:49] I/launcher - #01 failed 2 test(s)
[15:17:49] I/launcher - overall: 2 failed spec(s)
[15:17:49] E/launcher - Process exited with error code 1
wdBrowser.context('NATIVE_APP').then(() => {
browser.takeScreenshot().then(function (png) {
console.log('browser.takeScreenshot()');
var stream = fs.createWriteStream('screenshot.png');
stream.write(new Buffer(png, 'base64'));
stream.end(function(){
wdBrowser.context(<Your webview>).then(done);
});
})
});
其中wdBrowser是由wdBridge設置的全局變量。 應該可以-遇到類似的問題(無法拍攝屏幕截圖,但沒有像您一樣的錯誤消息)
您可以從appium日志中獲取您的webview名稱/ id。
wdBrowser.context('NATIVE_APP')
對我不起作用。
拍了照片,但隨后每個測試用例都失敗了。
我找到了截屏的其他解決方案。
我用以下代碼替換了takeScreenshots()方法:
var exec = require('child_process').exec;
exec('adb shell /system/bin/screencap -p /sdcard/' + filename); // Take a screenshot and store it on the internal storage.
// Wait until the screenshot is created on android
var date = new Date();
var curDate = null;
do {
curDate = new Date();
}
while (curDate - date < 1000);
var command = 'adb pull /sdcard/'+ filename + ' ' + screenshotPath;
exec(command, function (err, stdout, stderr) { // Copy the screenshot from the internal storage to the local computer.
if(err){
console.error('The screenshot could not be copied from the ANDROID device: ' + stdout);
console.log('The screenshot is stored on the ANDROID device with the name: ' + filename);
}
});
我有以下問題:
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