How to fetch DRIVER_EXE_PROPERTY for different browsers dynamically?

   In case of Selenium Automation for Web application, most of the time people needs to set DRIVER_EXE_PROPERTY in the code level prior to driver instantiation. For that we need to download the respective DRIVER_EXE and set the path of the DRIVER_EXE in the code.

  Here my piece of code explain how to fetch DRIVER_EXE_PROPERTY automatically while script execution for different browsers. I have done it for chrome, Firefox and IE in Windows system as well as chrome and Firefox in MAC system. Following are the details:

  Below code is necessary to instantiate chrome driver session. In this code I used  getWebAutomationDriver(browserName) to get the DRIVER_EXE path from the system.

System.setProperty(ChromeDriverService.CHROME_DRIVER_EXE_PROPERTY, getWebAutomationDriver(browserName));

ChromeDriverService chromeservice = new ChromeDriverService.Builder().build();

driver = new ChromeDriver(chromeservice); 

Following is the explanation for getWebAutomationDriver(browserName) method and there again we called  getActualDriverPath(browserName) as a private method to get the actual DRIVER_EXE path,

public static String getWebAutomationDriver(String browserName) throws InterruptedException {

String driverPath = null;

final String operatingSystem = System.getProperty(“os.name“);

try {

if (getActualDriverPath(browserName) == null) {

if (operatingSystem.contains(“Windows”)) {

if (browserName.equalsIgnoreCase(“chrome”)) {

System.out.println(

“chromedriver not installed on system, go to command-line and enter ‘npm install chromedriver’. \nAlso set PATH variable ‘C:\\Users\\…..\\node_modules\\chromedriver\\lib\\chromedriver’ in your system.\nOnce it done, you may need to restart your system”);

System.exit(0);

}

if (browserName.equalsIgnoreCase(“Firefox”)) {

System.out.println(

“geckodriver not installed on system, go to command-line and enter ‘npm install geckodriver’. \nAlso set PATH variable ‘C:\\Users\\…..\\node_modules\\geckodriver’ in your system.\nOnce it done, you may need to restart your system”);

System.exit(0);

}

if (browserName.equalsIgnoreCase(“IE”) || browserName.equalsIgnoreCase(“Internet Explorer”)

|| browserName.equalsIgnoreCase(“InternetExplorer”)) {

System.out.println(

“iedriver not installed on system, go to command-line and enter ‘npm i iedriver@3.7.0’. \nAlso set PATH variable ‘C:\\Users\\…..\\node_modules\\iedriver\\lib\\iedriver64’ in your system.\nOnce it done, you may need to restart your system”);

System.exit(0);

}

} else {

if (browserName.equalsIgnoreCase(“chrome”)) {

System.out.println(

“chromedriver not installed on MAC, go to terminal and enter ‘brew install chromedriver’. \nAlso set PATH variable in Run Configurations of your project. \nSteps: Right click on your project > Run As > Run Configurations > Environment tab”);

System.exit(0);

}

if (browserName.equalsIgnoreCase(“Firefox”)) {

System.out.println(

“geckodriver not installed on MAC, go to terminal and enter ‘brew install geckodriver’. \nAlso set PATH variable in Run Configurations of your project. \nSteps: Right click on your project > Run As > Run Configurations > Environment tab”);

System.exit(0);

}

}

} else {

driverPath = getActualDriverPath(browserName);

}

} catch (Exception e) {

e.printStackTrace();

}

return driverPath;

}

    Following is the explanation for getActualDriverPath(browserName) to fetch the actual DRIVER_EXE path,

private static String getActualDriverPath(String browserName) {

String actualDriverPath = null;

try {

String command = null;

final String operatingSystem = System.getProperty(“os.name“);

if (operatingSystem.contains(“Windows”)) {

if (browserName.equalsIgnoreCase(“chrome”)) {

command = “where ” + “chromedriver”;

}

if (browserName.equalsIgnoreCase(“Firefox”)) {

command = “where ” + “geckodriver”;

}

if (browserName.equalsIgnoreCase(“IE”) || browserName.equalsIgnoreCase(“Internet Explorer”)

|| browserName.equalsIgnoreCase(“InternetExplorer”)) {

command = “where ” + “IEDriverServer”;

}

} else {

if (browserName.equalsIgnoreCase(“chrome”)) {

command = “which ” + “chromedriver”;

}

if (browserName.equalsIgnoreCase(“Firefox”)) {

command = “which ” + “geckodriver”;

}

}

Process p = Runtime.getRuntime().exec(command);

p.waitFor();

BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));

String line = “”;

while ((line = reader.readLine()) != null) {

actualDriverPath = line;

break;

}

p.destroy();

} catch (Exception e) {

e.printStackTrace();

}

return actualDriverPath;

}

   Try to use above methods to get the DRIVER_EXE path automatically into your automation script.

make it perfect !