How to execute Parallel Test Cases in Appium with JUnit for IOS Apps

 

1. Prerequisites

• Xcode installed (with WebDriverAgent setup)

• Appium installed and running

• iOS devices or simulators connected and available

• Maven project with dependencies set up

• iOS app (.ipa or .app)

• Java 11+ and JUnit 5 recommended

• Unique udid and wdaLocalPort for each device

Maven Dependencies

<dependencies>
    <dependency>
        <groupId>io.appium</groupId>
        <artifactId>java-client</artifactId>
        <version>8.3.0</version>
    </dependency>
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter</artifactId>
        <version>5.9.3</version>
    </dependency>
</dependencies>

3. Create a Base Test Class

This handles session setup for each iOS device.

public class BaseIOSDriver {

    protected IOSDriver<MobileElement> driver;

    public IOSDriver<MobileElement> createDriver(String udid, int port, int wdaPort) {
        try {
            DesiredCapabilities caps = new DesiredCapabilities();
            caps.setCapability("platformName", "iOS");
            caps.setCapability("automationName", "XCUITest");
            caps.setCapability("udid", udid);
            caps.setCapability("deviceName", "iPhone");
            caps.setCapability("app", "/path/to/your.app");
            caps.setCapability("wdaLocalPort", wdaPort); // Must be unique
            caps.setCapability("noReset", true);

            URL appiumServer = new URL("http://localhost:" + port + "/wd/hub");
            driver = new IOSDriver<>(appiumServer, caps);
            return driver;
        } catch (Exception e) {
            throw new RuntimeException("Driver creation failed: " + e.getMessage());
        }
    }
}

4. Write Test Class for Each Device

You can use threads or @ParameterizedTest with parallel configuration.

public class ParallelIOSTest1 extends BaseIOSDriver {

    @Test
    public void testDevice1() {
        IOSDriver<MobileElement> driver = createDriver("DEVICE_UDID_1", 4723, 8100);
        // Your test steps
        System.out.println("Running on Device 1");
        driver.quit();
    }
}

public class ParallelIOSTest2 extends BaseIOSDriver {

    @Test
    public void testDevice2() {
        IOSDriver<MobileElement> driver = createDriver("DEVICE_UDID_2", 4725, 8200);
        // Your test steps
        System.out.println("Running on Device 2");
        driver.quit();
    }
}

5. Enable Parallel Execution in Maven

Create a junit-platform.properties file inside src/test/resources/:

junit.jupiter.execution.parallel.enabled=true
junit.jupiter.execution.parallel.mode.default=concurrent

6. Run Tests with Maven

mvn test

Or, run specific classes in parallel:

mvn -Dtest=ParallelIOSTest1,ParallelIOSTest2 test

Things to Remember:

• Each device needs its own wdaLocalPort

• Use Appium servers on different ports (4723, 4725, etc.)

• Consider running separate Appium instances for each device:

appium -p 4723 --webdriveragent-port 8100
appium -p 4725 --webdriveragent-port 8200