Setting system properties from command line but not able to access it in my step definition file

Question

Command:

mvn test -Dcucumber.options="--name 'Approve Rejected Creative'" -DEnvironment="Prod"

Feature file :

Given User launch "<Environment>" preflight
          When User enters Email as "zzzz" and Password as "zzzz"
          Then Click on Login
          When User approves <creativeNumber> creative starting from row <startRow>
          Then the creative should be approved

Step Def:

public void launchPreflight(String Env) {
        // Set up WebDriver and launch the preflight URL
        System.setProperty("webdriver.chrome.driver", 
                "/chromedriver/chromedriver");
        driver = new ChromeDriver();
        Env = System.getProperty("Environment");
        if(Env.contains("Prod") || Env.contains("prod") || Env.contains("PROD")) {
        driver.get(Prod_URL);
        }

Getting below error : Errors: [ERROR] Cannot invoke "String.contains(java.lang.CharSequence)" because "Env" is null

I tried setting properties in the testrunner file but still the same. Am I missing something here, I am new to this code.

Answer 1

In scenario, you parameterized "Enviromnent"

Given User launch "<Environment>" preflight

but you are assigning environment value to null(Env is null).

 Env = System.getProperty("Environment");

Update in below way,

Scenario

Given User launch Environment preflight

Code

   public void launchPreflight() {
    System.setProperty("webdriver.chrome.driver","/chromedriver/chromedriver");
    driver = new ChromeDriver();
    String env = System.getProperty("Environment");
    if(env.toLowerCase().contains("prod")) {
    driver.get(Prod_URL);
    }