The good news is that if you're using Firefox, you're in luck -- you can pretty much bypass this limitation thanks to the wonderful Firefox extension called Selenium IDE (used to be called Selenium Recorder.) I talked about the Selenium Recorder and other useful Firefox extensions in a previous post. What I want to show here is how easy it is to write Selenium tests, even against 3rd party applications, by using Selenium IDE.
I'll assume you already installed Selenium IDE. You need to launch it via the Firefox Tools menu. It will open a new Firefox window that you just leave running in the background.
Now let's say I want to test some Google searches, this being the canonical example used by people who want to play with Web testing tools. I go to google.com, I type "pycon 2006", then I click on the link pointing to the official PyCon 2006 site. While I'm on the PyCon page, I highlight the text "Welcome to PyCon 2006", I right-click and choose "assertTextPresent Welcome to PyCon 2006" from the pop-up menu that comes up (of course, I realize that a screencast would be better at this point, but it needs to wait for now....)
If you followed along, you'll notice that the Selenium IDE window contains actions such as type and clickAndWait, as well as validation statements such as assertTitle and assertTextPresent. In fact, Selenium IDE just created a Selenium test case for you. Here's a snapshot of what I have at this point:
Now you have several options for replaying and saving the current test.
You can click on the large green arrow button. This will replay the actions in a Firefox window and will color the Selenium IDE assertion rows green or red, depending on the result of the actions.
You can also click on the smaller green arrow button, to the right on the Selenium IDE. This will open a new Firefox window and will show the test in the familiar Selenium TestRunner mode, something like this:
At this point, you can run the test in the standard TestRunner mode, by clicking for example on the Run button in the TestRunner Control Panel.
Note however the URL of the test:
At this point, you can also save the test by choosing File->Save Test or pressing Ctrl-S in the Selenium IDE. The test will be saved as an HTML file.
An important note: all this Selenium IDE hocus-pocus does lock you in on Firefox. As soon as you start testing pages that are not under your application root, or you start mixing http and https in your tests, you will not be able to run the same tests under IE, Camino, Safari or other browsers -- at least not until people come up with browser-specific extensions that will get around the XSS limitation.
If you want your tests to be portable across browsers, you can still use Selenium IDE to create the tests. You just need to make sure you test pages that are within your application, and that use the same protocol throughout the test. After saving the tests as local HTML files, you need to copy them over to the Selenium installation that you have deployed on the server hosting the application under test. In any case, I urge you to start using Selenium IDE. It will give you a major productivity boost in writing Selenium tests. There are other features of the IDE that I haven't covered here (after all, it's meant to be an IDE, and not only a playback/capture tool), but for this I'll let you read the online documentation or, even better, watch the movie.
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