How to Check That Same Script Dont Run Again in Task Schedular in Selenium Java

Selenium WebDriver is one of the well-nigh important parts of the Selenium examination suite family. But before exploring Selenium WebDriver, let's begin with a few nuts near Selenium.

What is Selenium?

Selenium refers to a suite of tools that are widely used in the testing customs when it comes to cross-browser testing. Selenium cannot automate desktop applications; it can simply be used in browsers. Information technology is considered to be ane of the most preferred tool suites for automation testing of web applications as it provides support for popular web browsers which makes it very powerful.

Information technology supports a number of browsers (Google Chrome 12+, Internet Explorer 7,8,9,10, Safari 5.ane+, Opera 11.5, Firefox 3+) and operating systems (Windows, Mac, Linux/Unix).

Selenium also provides compatibility with different programming languages – C#, Java, JavaScript, Ruby, Python, PHP. Testers can cull which language to design examination cases in, thus making Selenium highly favorable for its flexibility.

Note: It is not mandatory to write Selenium lawmaking in the same language every bit the awarding. For example, if the application under test is written in PHP, then testers don't take to write Selenium code in PHP. Thus, if a website is written in C#, the Selenium lawmaking can be written in PHP likewise.

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Selenium Components

The Selenium test suite comprises four main components:-

• Selenium IDE

Selenium IDE (Integrated Development Surroundings) is primarily a tape/run tool. It is an Add-on or an extension bachelor for both Firefox and Chrome that generates tests speedily through its functionality of record and playback. You don't need to learn any examination scripting language for authoring any functional tests.

• Selenium RC

In the case of working with Selenium RC (Remote Control), ane must take proficient knowledge of at least one programming linguistic communication. This tool allows you to develop responsive design tests in any scripting language of your choice. Server and client libraries are the two primary components of Selenium RC. Its architecture is complex and it has its limitations.

• Selenium Webdriver

Selenium WebDriver is an enhanced version of Selenium RC. It was introduced in the market to overcome the limitation faced in Selenium RC. Though it is an advanced version of RC, its architecture is completely different from that of RC. Merely like Selenium RC, Selenium WebDriver too supports multiple programming platforms to provide wider flexibility and requires knowing any one programming linguistic communication.

• Selenium Grid

Selenium Grid is a tool that is used for concurrent execution of test cases on different browsers, machines, and operating systems simultaneously. This tool makes Cross-browser compatibility testing very like shooting fish in a barrel. There are two versions of the Selenium Filigree – the older version is known equally Grid 1 and the recent version is known every bit Grid two.

Now permit's move on to the tutorial on Selenium WebDriver .

What is Selenium WebDriver?

Selenium WebDriver is a web framework that permits you to execute cross-browser tests. This tool is used for automating web-based awarding testing to verify that it performs expectedly.

Selenium WebDriver allows you to choose a programming language to create exam scripts. As discussed before, it is an advancement over Selenium RC to overcome a few limitations. Selenium WebDriver is not capable of treatment window components, but this drawback tin be overcome past using tools like Sikuli, Auto IT, etc.

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At present allow's attempt to understand the WebDriver Architecture.

Selenium WebDriver Framework Compages

WebDriver Compages is made up of 4 major components:

1. Selenium Client library
2. JSON wire protocol over HTTP
3. Browser Drivers
4. Browsers

Selenium Client Libraries/Linguistic communication Bindings

Selenium provides back up to multiple libraries such as Ruby, Python, Java, etc as linguistic communication bindings have been developed by Selenium developers to provide compatibility for multiple languages. For instance, if you lot want to utilize the browser commuter in Python, utilize the Python Bindings. You can download all the supported linguistic communication bindings of your choice from the official site of Selenium.

JSON Wire Protocol

JSON is an acronym for JavaScript Object Annotation. Information technology is an open standard that provides a transport machinery for transferring data betwixt client and server on the web. It provides back up for various information structures like arrays and objects which makes it easier to read and write data from JSON.

JSON serves as a REST (Representational State Transfer) API that exchanges information between HTTP servers. Larn more than most Balance API for accessing Selenium

Browser Drivers

Selenium provides drivers specific to each browser and without revealing the internal logic of browser functionality, the browser driver interacts with the respective browser past establishing a secure connection. These browser drivers are likewise specific to the language which is used for test case automation like C#, Python, Java, etc.

You can download the browser driver of your choice as per your language requirements. For case, you can configure Selenium Web driver for Python on BrowserStack.

When a exam script is executed with the aid of WebDriver, the following tasks are performed in the background:

• An HTTP request is generated and it is delivered to the browser driver for every Selenium Command
• The HTTP asking is received by the driver through an HTTP server
• All the steps/instructions to exist executed on the browser is decided by an HTTP server
• The HTTP server then receives the execution status and in plough sends information technology back to the automation scripts

Browsers

Every bit discussed earlier, Selenium provides support for multiple browsers like Chrome, Firefox, Safari, Internet Explorer etc.

Curious about Selenium 4? Try this in-depth webinar on Selenium 4 past Simon Stewart, the Selenium Project's lead, the creator of WebDriver, and the co-editor of the W3C WebDriver specification.

Basic Steps in a Selenium WebDriver Script

• Create a WebDriver instance.
• Navigate to a webpage.
• Locate a spider web element on the webpage via locators in selenium.
• Perform ane or more user actions on the element.
• Preload the expected output/browser response to the action.
• Run test.
• Record results and compare results from them to the expected output.

In order to run tests, ane must be familiar with the Basic Commands in Selenium WebDriver.

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Benefits of Selenium WebDriver

• It is one of the about popular Open-Source tools and is piece of cake to get started with for testing web-based applications. It likewise allows you to perform cross browser compatibility testing.
• Supports multiple operating systems similar Windows, Mac, Linux, Unix, etc.
• It provides compatibility with a range of languages including Python, Java, Perl, Cherry, etc.
• Provides support for modern browsers like Chrome, Firefox, Opera, Safari, and Internet Explorer.
• Selenium WebDriver completes the execution of exam scripts faster when compared to other tools
• More Concise API (Application Programming interface) than Selenium RC'south
• It also provides compatibility with iPhoneDriver, HtmlUnitDriver, and AndroidDriver

Limitations of WebDriver

• Support for new browsers is not readily bachelor when compared to Selenium RC
• For the automated generation of test results, information technology doesn't have a built-in control

How Selenium WebDriver Works

On a loftier-level, Selenium WebDriver works in three steps:

• Test commands are converted into an HTTP request by the JSON wire protocol.
• Earlier executing whatsoever exam cases, every browser has its own driver which initializes the server.
• The browser then starts receiving the request through its driver.

Let's take an example with the lawmaking snippet below:

WebDriver driver = new ChromeDriver (); commuter. get (https://www.browserstack.com)

As soon as you lot complete writing your code, execute the programme. The higher up code will result in the launching of the Chrome browser which will navigate to the BrowserStack website.

At present let united states of america sympathise what goes behind the scene when you click on Run until the launching of the Chrome Browser.

One time the program is executed, every line of lawmaking/script will become transformed into a URL. The JSON Wire protocol over HTTP makes this possible. Then this URL is passed to the browser drivers (in our case, the ChromeDriver). At this point, our client library (Python in our example) translates the code into JSON format and interacts with the ChromeDriver.

The URL afterward JSON conversion looks as follows:

https://localhost:8080/{"url":https://www.browserstack.com"}

To receive the HTTP requests, every Browser Driver uses an HTTP server. Once the browser driver receives the URL, it processes the request by passing it to the real browser over HTTP. Then all your commands in the Selenium scripts will exist executed.

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Types of Requests

There are 2 types of requests you might exist familiar with – GET and POST.

If it's a GET request and then it results in a response that will be generated at the browser end and it will be sent over HTTP to the browser driver and eventually, the browser driver with the help of JSON wire protocol sends it to the UI (Eclipse IDE).

How to use Selenium WebDriver: Example

The lawmaking below automates the login function on the BrowserStack Sign-in folio in Chrome:

          import                      org          .          openqa          .          selenium          .          By          ;          import                      org          .          openqa          .          selenium          .          WebDriver          ;          import                      org          .          openqa          .          selenium          .          WebElement          ;          import                      org          .          openqa          .          selenium          .          chrome          .          ChromeDriver          ;          import                      org          .          testng          .          Assert          ;          import                      org          .          testng          .          annotations          .          Exam          ;          public          grade          LoginAutomation          {          @Test          public          void                      login          ()          {          Organization          .          setProperty          (          "webdriver.chrome.driver"          ,          "path of commuter"          );          WebDriver                      commuter          =          new          ChromeDriver          ();                      commuter          .          manage          ().          window          ().          maximize          ();                      driver          .          go          (          "https://www.browserstack.com/users/sign_in"          );          WebElement                      username          =          commuter          .          findElement          (          Past          .          id          (          "user_email_Login"          ));          WebElement                      password          =          driver          .          findElement          (          By          .          id          (          "user_password"          ));          WebElement                      login          =          driver          .          findElement          (          Past          .          name          (          "commit"          ));                      username          .          sendKeys          (          "abc@gmail.com"          );                      password          .          sendKeys          (          "your_password"          );                      login          .          click          ();          String                      actualUrl          =          "https://live.browserstack.com/dashboard"          ;          String                      expectedUrl          =                      driver          .          getCurrentUrl          ();          Affirm          .          assertEquals          (          expectedUrl          ,          actualUrl          );          }          }        

The code above does the following:

• Create a Selenium WebDriver instance
• Configure browser if required
• Navigate to the required web page and locate the relevant web element
• Perform activity on the spider web element
• Verify and validate the activity

On executing the code, Selenium will navigate to the Chrome browser and open up the Browserstack login page. Then, it volition log in using the relevant credentials. It will as well check the exam case status using Assert and try to match the URL.

All Selenium tests must be run on existent devices for authentic results. Beginning running tests on 2000+ real browsers and devices on BrowserStack's real device deject. Run parallel tests on a Deject Selenium Grid to get faster results without compromising on accuracy. Detect bugs earlier users do by testing software in real user conditions with BrowserStack Automate.

Features of BrowserStack Automate:

• Run hundreds of concurrent tests
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This tutorial is meant to initiate new users to the many functions and uses of Selenium WebDriver. Later on studying the nuts, explore many of the Selenium tutorials on the BrowserStack Guide in guild to explore and empathise how Selenium WebDriver is one of the near powerful resources in a tester's toolkit.

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Source: https://www.browserstack.com/guide/selenium-webdriver-tutorial

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