Selenium Webdriver (Part 2) - Waits

 Types of Waits:

1. Implicit Wait

2. Explicit Wait

1. Webdriver Wait
2. Fluent Wait

Implicit Wait-

Pros-

1. Declared globally. Wait for a max of n number of seconds before you throw error.

2. Readable code.

Cons-

1. Performance cause issues

2. if implicit wait is set to 20 s say, then we cannot find which components are slowly loading.

Explicit Wait-

Pros-

1. Specific to that locator only.

2. Wait is applied at only targeted elements. So no performance issues.

Cons-

1. More written code and disturbs readability.

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Explicit Waits are of two types:

   1. Webdriver Wait

   2. Fluent Wait

Both implement the Wait interface.

FluentWait doesn't have methods to use, so we need to create custom methods for it to use it.

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Syntax/examples:

1. Fluent Wait

Wait<Webdriver> wait = new FluentWait<Webdriver>();

.withTimeout(10,SECONDS)

.pollingEvery(2,SECONDS)

.ignoring(NoSuchElementException.class)

2. Implicit Wait

driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS); // Duration.of(5) not working

3. Explicit Wait 

WebDriverWait wait = new WebDriverWait(driver, 10);

WebElement element = wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("element_id")));

wait.until(ExpectedConditions.textToBePresentInElementLocated(By.className("message"), "Success"));

wait.until(ExpectedConditions.alertIsPresent());

4. Thread.sleep

Halts the code for n seconds.