Per Erik Strandberg /cv /kurser /blog

In Installing Selenium I showed you how to rapidly install selenium in Ubuntu. Today we will take a look at:

Installing Selenium and friends

Since I want to run tests in the python environment I want to start by installing python and then the selenium bindings:

  1. First install Python
    • From f.x. [1]
    • We add some fodlers to the PATH environment variable (right click my computer -> properties -> advanced -> environment variables -> add a user variable called Path where you insert "C:\Python27;C:\Python27\Scripts" - we will need the scripts folder later)
  2. You can install Selenium in a couple of ways - let's install pip
    • download and install easy_install [2]
    • if your path is ok you can now open a dos-box (Win-button + R -> cmd) and type: easy_install pip (easy_install.exe pip), and next pip install selenium (pip.exe install selenium)
  3. Check the installation
    • In the dos box run python
    • run: from selenium import webdriver

OK, that should be it - we should now have a proper python and selenium installation.

Making a first test with Firefox

If you have not installed Firefox download it from: [3] so we can test selenium.

Now open up a dos-box and, in python, run:

from selenium import webdriver
from import WebDriverWait

driver = webdriver.Firefox()

element = driver.find_element_by_name("search")
    WebDriverWait(driver, 20).until(
        lambda drv : drv.title.startswith("Selenium")
    title = driver.title
except TimeoutException:
    title = "Not found..."

print "firefox title was %s" % title

If you are quick enough you might be able to capture a screen shot that looks something like this:

Web testing with Chrome (or chromium) and Internet Explorer

In order to run the same test in Explorer or Chrome you need some specific web drivers from google code:

I just extracted the exe-files and dumped them in a folder that I added to my path-variable. If you are using Chromium instead of Chrome just copy/paste the chromium-folder from %LOCALAPPDATA%\Chromium to %LOCALAPPDATA%\Google\Chrome - you will not have to do this if you are running vanilla Chrome.

Now, in order to test in these three browsers at the same time I refactored the test script a bit:

from selenium import webdriver
from import WebDriverWait

def check_wikipedia(driver):
    Use the driver to check the searchability of wikipedia.
    Then discard the driver and return the title

    element = driver.find_element_by_name("search")

    # chrome and chromium dislikes sending "Selenium" for some reason
        WebDriverWait(driver, 20).until(
            lambda drv : drv.title.startswith("Selenium")
        title = driver.title
    except Exception:
        title = "Not found..."
    #driver.close() # uncomment later
    return title

print "chrome title was %s" % check_wikipedia(webdriver.Chrome())
print "firefox title was %s" % check_wikipedia(webdriver.Firefox())
print "IE title was %s" % check_wikipedia(webdriver.Ie())

Since I uncommented the close line you will get something like this:

Android SDK

We are now ready to move on to installing the Android SDK.

  1. Download and install the Android sdk from [6]
  2. Tell the installer to start after installation
  3. Select the API's you want and update (I took the required tools and + 4.* + 3.2)
  4. Wait :-(
  5. Afterwards you need to update the PATH environment variable again. Add: %ProgramFiles%\Android\android-sdk\tools and %ProgramFiles%\Android\android-sdk\platform-tools (or where ever you installed the SDK)

Create and Android Virtual Device

Open up a dos-box and create a new android virtual device: android create avd -n my_android -t android-16 -c 200M - this will create an Android Virtual Device that targets android-16 with an SD-card of 200 megabytes. If it asks you to create a new hardware profile: say no.

You can start the device by for example: emulator -avd my_android -no-audio -no-boot-anim -scale .8

Prepare the Android Virtual Device for Selenium

You need the webdriver app (in APK format) for the Android Virtual Device - get it from google code: [7]

You might need to tell the device to allow unknown sources. Make sure it is enabled in Menu -> Settings -> Security -> Unknown sources.

Install and start the app - after a while it will say that it is ready.

The next step is to enable port forwarding adb forward tcp:8080 tcp:8080 (make sure you have no other service on your computer running at 8080 - like Team Foundation Server or so).

Using the same code as above we can now just add a few lines:
Run a quick test to make sure you can connect

    a_driver = webdriver.Remote("http://localhost:8080/wd/hub",
    print "Android Browser title was %s" % check_wikipedia(a_driver)

Test on target

OK, so far we have tested web pages on our computer in an environment we own. Now we want to perform the same test on a real Android Device - on target. We are in fact just a few steps away:

  1. We need to install webdriver on the target
  2. Start it and allow port forwarding.
  3. We need to tether the device and the computer in order to allow them to share network.
  4. Then it is rock and roll!

The webdriver app is the same as we installed in the emulator: [8]

The port forwarding command is the same ad for the emulator: [9]

Tethering can be done in many ways I guess - I tried pdanet and it worked on the first attempt: [10] You need to install it as an app on the device and as an app on the computer. Then you connect the two using a usb-cable.

You can now run the same test as you did with the emulator (just make sure it is turned off)!

As always: I hereby provide you with the success screen shot:

This page belongs in Kategori Programmering
This page belongs in Kategori Test