[selenium-users] JUnit screenshots problem

On 12 July 2012 09:24, Bogdan Katyński wrote:
Hello Group :)

I am running selenium tests written in Java as a JUnit task. On a headless
Linux machine with the use of FirefoxDriver and Xvfb. I would like to take a
screenshot when the test fails. There is the following piece of code to take
the screenshots:

@Rule
public TestName name = new TestName();


/**
* TestWatchmen used to take screenshots of browser window if a test
fails.
*/

@Rule
public MethodRule watchman = new TestWatchman() {
@Override
public void failed(Throwable e, FrameworkMethod method) {
System.err.println("TAKING SCREENSHOT");
File scrFile = ((TakesScreenshot)
driver).getScreenshotAs(OutputType.FILE);
Calendar now = new GregorianCalendar();
File outDir = new File(OUT_DIR);
outDir.mkdir();
System.err.println("Output directory: " +
outDir.getAbsolutePath());
//String scrFilename = e.getStackTrace()[0].toString() + ".png";
String scrFilename = name.getMethodName() + ".png";

System.err.println("Taking screenshot to " + scrFilename);


File outputFile = new File(outDir, scrFilename);

try {
FileUtils.copyFile(scrFile, outputFile);
} catch (IOException ioe) {
System.err.println("Failed.");
}

}
};

And here there is a part of the testing function that generates an error:

help.clickDefault("Subnet mask:");
assertTrue(help.isParameterEnabled("Subnet mask:"));
assertEquals("255.255.255.0", help.getText("Subnet mask:"));

help.getText("Subnet mask:") returns "255.255.255.255" so the assert fails.
In the stderr of the test I see the following:

INFO: Executing: [a26c92eb-36ac-4602-a1bf-5d0561771292, getElementText
{"id":"{65097ec4-ae14-4cff-b99f-d76f2281f608}"}]
Jul 12, 2012 9:12:05 AM org.openqa.selenium.remote.RemoteWebDriver execute
INFO: Executing: [a26c92eb-36ac-4602-a1bf-5d0561771292, getElementText
{"id":"{dbc96864-ba6e-42de-a8d9-e5a479e0c370}"}]
Jul 12, 2012 9:12:05 AM org.openqa.selenium.remote.RemoteWebDriver execute
INFO: Executing: [a26c92eb-36ac-4602-a1bf-5d0561771292, quit {}]
TAKING SCREENSHOT
Jul 12, 2012 9:12:05 AM org.openqa.selenium.remote.RemoteWebDriver execute
INFO: Executing: [null, screenshot {}]

And in the XML report of the junit test there's this message:

Error Message

Error communicating with the remote browser. It may have died. Build info:
version: '2.15.0', revision: '15105', time: '2011-12-08 09:57:28' System
info: os.name: 'Linux', os.arch: 'amd64', os.version:
'2.6.26-2-openvz-amd64', java.version: '1.6.0_18' Driver info:
driver.version: FirefoxDriver

Stacktrace

org.openqa.selenium.remote.UnreachableBrowserException: Error communicating
with the remote browser. It may have died.
Build info: version: '2.15.0', revision: '15105', time: '2011-12-08
09:57:28'
System info: os.name: 'Linux', os.arch: 'amd64', os.version:
'2.6.26-2-openvz-amd64', java.version: '1.6.0_18'
Driver info: driver.version: FirefoxDriver
at
org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:421)
at
org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:428)
at
org.openqa.selenium.firefox.FirefoxDriver.getScreenshotAs(FirefoxDriver.java:204)
at validation$1.failed(validation.java:60)
Caused by: org.openqa.selenium.WebDriverException: The FirefoxDriver cannot
be used after quit() was called.
Build info: version: '2.15.0', revision: '15105', time: '2011-12-08
09:57:28' System info: os.name: 'Linux', os.arch: 'amd64', os.version:
'2.6.26-2-openvz-amd64', java.version: '1.6.0_18'
Driver info: driver.version: FirefoxDriver at
org.openqa.selenium.firefox.FirefoxDriver$LazyCommandExecutor.execute(FirefoxDriver.java:235)
at
org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:401)

It looks like the @After function was called before the screenshot and there
is no firefox running. Is there a way to make Junit execute the TestWatchman
before the @After function?

Best regards
Bogdan Katyński




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Hi!

I just wrote a blog post about this. The issue you are facing is due
to the fact that the browser is closed when you are about to take the
screen shot.
My solution is to close the browser in a finished() method in the rule.

Read all about it here:


http://thomassundberg.wordpress.com/2012/07/08/performing-an-action-when-a-test-fails/

HTH
Thomas


--
Thomas Sundberg
M. Sc. in Computer Science

Mobile: +46 70 767 33 15
Blog: http://thomassundberg.wordpress.com/
Twitter: @thomassundberg

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