Config Reader and Utilities

Environment Config Files

Example

Keep URLs, browsers and timeouts out of code:

src/test/resources/config/qa.properties

baseUrl=https://qa.shopease.example.com
browser=chrome
headless=false
explicitWait=10
[email protected]

public final class ConfigReader {
    private static final Properties PROPS = new Properties();

    static {
        String env = System.getProperty("env", "qa");     // mvn test -Denv=staging
        String file = "/config/" + env + ".properties";
        try (InputStream in = ConfigReader.class.getResourceAsStream(file)) {
            PROPS.load(in);
        } catch (IOException | NullPointerException e) {
            throw new IllegalStateException("Cannot load " + file, e);
        }
    }

    public static String get(String key) {
        return System.getProperty(key, PROPS.getProperty(key));   // -Dkey=value wins
    }

    public static boolean getBoolean(String key) { return Boolean.parseBoolean(get(key)); }
    public static int getInt(String key) { return Integer.parseInt(get(key)); }
}

Runnable Config Reader

Example

The same logic with the file content in a text block. A command-line override (-Dheadless=true) is simulated with System.setProperty:

import java.io.*;
import java.util.*;

public class Main {
    static final Properties PROPS = new Properties();

    static String get(String key) { return System.getProperty(key, PROPS.getProperty(key)); }

    public static void main(String[] args) throws IOException {
        String qaFile = """
                baseUrl=https://qa.shopease.example.com
                browser=chrome
                headless=false
                explicitWait=10
                """;
        PROPS.load(new StringReader(qaFile));
        System.setProperty("headless", "true");     // like mvn test -Dheadless=true on CI

        for (String key : List.of("baseUrl", "browser", "headless", "explicitWait")) {
            System.out.println(key + " = " + get(key));
        }
        int wait = Integer.parseInt(get("explicitWait"));
        System.out.println("Explicit wait in ms: " + wait * 1000);
    }
}

Output

baseUrl = https://qa.shopease.example.com
browser = chrome
headless = true
explicitWait = 10
Explicit wait in ms: 10000

Test Data Utilities

Example

Registration tests need a new email every run. A fixed timestamp keeps this output stable; in a real framework use System.currentTimeMillis() or a UUID:

import java.time.*;
import java.time.format.*;
import java.util.concurrent.atomic.*;

public class Main {
    static final AtomicInteger COUNTER = new AtomicInteger();

    static String uniqueEmail(String prefix, LocalDateTime now) {
        String stamp = now.format(DateTimeFormatter.ofPattern("yyyyMMddHHmmss"));
        return prefix + "+" + stamp + "_" + COUNTER.incrementAndGet() + "@test.shopease.in";
    }

    static String indianMobile(int seed) {
        return "9" + String.format("%09d", (seed * 7919L) % 1_000_000_000L);
    }

    public static void main(String[] args) {
        LocalDateTime runTime = LocalDateTime.of(2026, 3, 14, 10, 30, 5);
        for (int i = 1; i <= 3; i++) {
            System.out.println(uniqueEmail("asha", runTime) + "  " + indianMobile(i * 12345));
        }
    }
}

Output

[email protected]  9097760055
[email protected]  9195520110
[email protected]  9293280165