Tutorial 15 – Integrate Cucumber with Selenium – Part 2
What you will Learn :
Add a utility in DriverFactory
ThreadLocal concept
init_driver() method
getDriver() method
delete cookies and maximize browser
synchronized keyword for parallel execution
ConfigReader properties file
Add a utility in DriverFactory
Let us go to our DriverFactory class. In this class, we will write a utility or a function which will return the driver.
Let us start by creating the ‘driver’ object and importing the WebDriver library
ThreadLocal concept
Let’s say, we have 3 threads that are available, see the below figure.
Now using threadlocal, we will write ‘Webdriver driver = new chromedriver’
Every thread wil get the same copy of driver because of thread local concept. So first thread will start first test case with chrome browser, second thread will start another test case in parallel with another chrome browser, third thread will start another test case in parallel with another chrome browser and so on…All the 3 threads have same copy of webdriver and hence parallel execution is possible
If we don’t use the thread local, we will not be able to execute parallel execution in cucumber framework because we don’t have TestNG concept over here. So lets say we create multiple threads using maven. So, in this case, if thread 1 is using the driver, thread 2 cannot use the same driver copy. It has to wait for the previous test case execution to over
So, in order to perform parallel testing, we should create a driver session for every Test to make Tests independent (Automation best practice). By default, WebDriver is not Thread Safe. We can use ThreadLocal class in Java to make WebDriver instance thread-safe:
ThreadLocal driver = new ThreadLocal()
ThreadLocal class has it’s setter/getter method, using which we can set or get the driver instance for a particular thread:
driver.set(new ChromeDriver)
driver.get().get(url)
Keeping ThreadLocal concept in mind, let us create an instance of ThreadLocal class
init_driver() method
We will now create init_driver method which accepts ‘browser’ as argument and the method will initiate the value of WebDriver on the basis of the browser property
We will now an SOP to print the value of ‘browser’ and also write an ‘if’ loop and initiate the ChromeDriver, see below
We will next write the ‘else if’ loop for another driver
Next we will write an ‘else’ loop and pass an SOP as seen below
getdriver() method
In the above method we had ‘set’ the driver. We will create another method that will ‘get’ the reference of WebDriver (example, chrome driver, firefox driver)
delete cookies and maximize browser
After initializing the driver, we can now call the getDriver method to delete the cookies and maximize the browser
After maximizing the browser, we will return the getDriver() at runtime. So, at runtime, the current instance of WebDriver will be given, see below
Now line#30 above is throwing an error because the init_driver method type is void (line 13). Now, if you mouseover get() method, we see that getDriver() method is returning us WebDriver
So this means that line#30 is also returning us WebDriver. So, let us change void to WebDriver. Notice that erorr is resolved, see below
Lets say multiple threads are running in parallel execution and they all will be calling the getDriver method. We can use ‘synchronized’ keyword to ensure all the threads are in sync
So this completes our DriverFactory class, below is the complete code
ConfigReader properties file
Next, we will be creating a properties file to interact with below config.properties file
Create a ‘util’ folder under src/main/java and create ConfigReader.java file under util folder, see below
Let us now add a private variable ‘prop’ and create a method init_prop() to initialize the properties. We then create an object reference of Properties class, see below
Next, to interact with the config.properties file, we will create an object of FileInputStream class
We will now pass the location of config.properties file inside the FileInputStream constructor
Just copy the location path starting from src\test onwards as seen below
Paste the path within double quotes
Next, put a .\\ at the starting of src
Note: Dot . is used to indicate relative position within the hierarchical tree of names
Next, surround with try/catch block to resolve the error
We will next load the properties file
Add catch block to resolve the error
Next, we will return the properties
We are getting an error since the method type is void. Let us change the type to ‘Properties’.
Below is the complete code
We will continue in the next tutorial.
Thank you for reading!
