如果条件在 selenium 中不起作用，则 Boolean 表达式

Question

I am trying to create a scenario in automation in which it enters Login credentials and clicks on Sign In button and after that it searches for an element. If element is displayed then it prints Valid Credentials and if element is not displayed then it does some other operation but code doesn't work after clicking on Sign In button. Here I have created a method for it.

public void toCheckLoginVerification() throws InterruptedException,MalformedURLException {
    clickOnSignInbutton();
    enterEmailId("s243535@yopmail.com");
    enterPassword("Test@123");
    clickOnSignInButtonOnSignInScreen(); //code not working after this.
    boolean x = driver.findElement(By.xpath("//android.view.View[@content-desc='Trips']")).isDisplayed();
    if(x==true) {
        System.out.println("Valid Credentials");
    } else {
        System.out.println("Invalid Credentials");
        clearEmailid();
        clearPassword();
        enterEmailId("s2@yopmail.com");
        enterPassword("Test@123");
        clickOnSignInButtonOnSignInScreen();
        clickOnProfileButtonOnHomeScreen();
    }
}

I have created the above methods in other class but calling them here. To be more specific I am using Appium.

Answer 1

You should use explicit wait instead of implicit wait.
With your code selenium finds the element at the moment it is just created but still not fully loaded / rendered. So when your driver.findElement(By.xpath("//android.view.View[@content-desc='Trips']")) returns the element it is still not displayed / visible.
While you should wait until the element is found visible.
So, you can use the following method:

public boolean waitForElementToBeVisible(String xpath, int delay) {
        wait = new WebDriverWait(driver, delay);
        try {
            wait.until(ExpectedConditions.visibilityOfElementLocated(element));
            return true;
        }catch (Exception e){
            return false;
        }
    }

Now you can say:

if(waitForElementToBeVisible("//android.view.View[@content-desc='Trips']",10)){
    System.out.println("Valid Credentials");
} else{
    System.out.println("Invalid Credentials");
    clearEmailid();
    clearPassword();
    enterEmailId("s2@yopmail.com");
    enterPassword("Test@123");
    clickOnSignInButtonOnSignInScreen();
    clickOnProfileButtonOnHomeScreen();
}

Answer 2

You are checking whether the element is displayed immediately.. Instead you should use implicit or explicit wait mechanism of selenium

Answer 3

'Statement' inside if block will be executed if the Boolean expression (Condition) is true. If the Boolean expression is false then, statements inside if block will not be executed and it executes the rest of code after if block.

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if(waitForElementToBeVisible("//android.view.View[@content-desc='Trips']",10)){ System.out.println("Valid Credentials"); } else{ System.out.println("Invalid Credentials"); clearEmailid(); clearPassword(); enterEmailId("s2@yopmail.com"); enterPassword("Test@123"); clickOnSignInButtonOnSignInScreen(); clickOnProfileButtonOnHomeScreen(); } public boolean waitForElementToBeVisible(String xpath, int delay) { wait = new WebDriverWait(driver, delay); try { wait.until(ExpectedConditions.visibilityOfElementLocated(element)); return true; }catch (Throwable t){ return false; } }