使用Java从另一个类调用变量

Question

i have a code to test a web application using webdriver, the app contains more than 100 elements. My testing code works fine but if one day if one of the element is modified i will have to change in all my code everywhere is use this element. So i want to put all element as String in one class and then call one of the element from another class.

How can do this? For example: my test code for gmail inbox:

public class ShowInbox {

    public ShowInbox(WebDriver driver) {


        driver.get(driver.getCurrentUrl());
        Utility.wait(3);
        String Inbox = "J-Ke n0";
        String MsgSuivis = "J-Ke n0 aBU";

        try {
        driver.findElement(By.className(Inbox)).isDisplayed();
        System.out.println("Boîte de réception exists");
        driver.findElement(By.className(Inbox)).click();
        } 
catch (NoSuchElementException e) {
System.out.println("Boite de réception is not displayed");
        } finally {
            System.out.println("continue");
        }

        try {

            driver.findElement(By.className(MsgSuivis)).isDisplayed();
            System.out.println("Messages suivis exists");
            driver.findElement(By.className(MsgSuivis)).click();
        } catch (NoSuchElementException e) {
            System.out.println("Messages suivis is not displayed");
        } finally {
            System.out.println("continue");
        }
        driver.quit();
    }
}

This code is working well when it runs. Now i want to create a class which will contain only String Inbox = "J-Ke n0"; String MsgSuivis = "J-Ke n0 aBU"; And then in another i want to call for example only Inbox and then the code to test the inbox.

Any help please, thank you

Answer 1

If I am not mistaken, you are looking for a separate class to store your constant strings. This is done by creating a new class and making the fields public. There are also a few good practices for this:

ElementNames.java

public final class ElementNames {

    public static final String Inbox = "J-Ke n0";
    public static final String MsgSuivis = "J-Ke n0 aBU";
    // ... more names

    private ElementNames() { } // Private default constructor
}

Here, public allows access to the variables from outside the class. static allows access to the variables without creating an instance of the class. final is important so that the value is constant and cannot be modified after initialization.

Another common pattern is to create a private default constructor so that someone doesn't accidentaly create an instance of the constants class.

To use the new constants:

ShowInbox.java

public class ShowInbox {

    public ShowInbox(WebDriver driver) {

        // ...
        driver.findElement(By.className(ElementNames.Inbox)).isDisplayed();
        System.out.println("Boîte de réception exists");
        driver.findElement(By.className(ElementNames.Inbox)).click();

        // ...
   }
}