How to load Config.properties file in Cucumber TestRunner.java file?

Question

To run my Selenium/Cucumber java project, I need to pass some VM arguments, variables, properties path etc... now easiest way is to pass it in Eclipse run configuration under "VM arguments" tab. I need to give path of Log4j2.xml, sqlJdbc driver, any UserID etc.

Now, if i put all this in a properties file and then run the "TestRunner', then how can i make sure properties are loaded before the Features run. I get NullPointerException.

Can i put this in a static block? THis way will it get initialized before any TestNG feature runs?

@CucumberOptions(glue = { "stepDefinitions" }, features = {
        "src/test/resources/features/CreateUserProfile.feature" }, plugin = { "pretty",
                "json:test-output/JsonReport.json", "html:test-output/HTMLReport.html",
                "com.aventstack.extentreports.cucumber.adapter.ExtentCucumberAdapter:", })

public class TestRunner {
    public TestNGCucumberRunner testNGCucumberRunner;

    @BeforeClass(alwaysRun = true)
    public void setUpClass() {
        if (testNGCucumberRunner == null) {
            testNGCucumberRunner = new TestNGCucumberRunner(this.getClass());
        }
    }

    @Test(groups = "cucumber scenarios", description = "Runs Cucumber Scenarios", dataProvider = "scenarios")
    public void scenario(PickleWrapper pickleEvent, FeatureWrapper cucumberFeature) throws Throwable {
        testNGCucumberRunner.runScenario(pickleEvent.getPickle());
    }

    @DataProvider
    public Object[][] scenarios() {
        if (testNGCucumberRunner == null) {
            testNGCucumberRunner = new TestNGCucumberRunner(this.getClass());
        }
        return testNGCucumberRunner.provideScenarios();
    }

    @AfterClass(alwaysRun = true)
    public void tearDownClass() {
        testNGCucumberRunner.finish();

    }

    static {
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        System.setProperty("current.date", dateFormat.format(new Date()));
        String propertyFilePath = "C:\\EclipseWorkspace\\Automation\\src\\main\\resources\\config.properties";
        BufferedReader reader;
        try {
            reader = new BufferedReader(new FileReader(propertyFilePath));
            Properties properties = new Properties();
            try {
                properties.load(reader);
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            throw new RuntimeException("Config.properties not found at " + propertyFilePath);
        }

    }

}

UPDATE:

I get this error ...i have loaded the properties file in the TestRunner.java file, also loaded in the BaseTest.java class where driver is initialized. Still i get this error. Please help. I don't want to use eclipse VM arguments and want my properties to be loaded from the script only.

java.lang.NullPointerException: Cannot invoke "String.equalsIgnoreCase(String)" because the return value of "java.lang.System.getProperty(String)" is null

Answer 1

Solution :

• Snippet to load config.properties

Properties prop=new Properties();

FileInputStream ips = new FileInputStream(“home/username/ProjectName/src/config.properties”);

prop.load(ips);

• Ensure .properties are getting loaded before features run:
  • Basically you can have multiple implementations to achieve this
  • On successful driver object creation, you can create and load the prop object
  • Good solution to use try..catch blocks for all the initialisation