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Zhimin Zhan 2015

Zhimin Zhan Selenium WebDriver Recipes in C# 10.1007/978-1-4842-1742-9_1

1. Introduction

Zhimin Zhan 1

(1)

Belconnen, Australia

Electronic supplementary material

The online version of this chapter (doi: 10.1007/978-1-4842-1742-9_1 ) contains supplementary material, which is available to authorized users.

Selenium WebDriver is a free and open source library for automated testing web applications. I assume that you have had some knowledge of Selenium WebDriver, based on the fact that you picked up this book (or opened it in your eBook reader).

Selenium was originally created in 2004 by Jason Huggins, who was later joined by his other ThoughtWorks colleagues. Selenium supports all major browsers and tests can be written in many programming languages and run on Windows, Linux, and Macintosh platforms.

Selenium 2 is merged with another test framework WebDriver (thats why you see selenium-webdriver) led by Simon Stewart at Google (he now works at Facebook), and Selenium 2.0 was released in July 2011. I use the names Selenium, WebDriver, and Selenium WebDriver interchangeably in this book.

Selenium Language Bindings

Selenium tests can be written in multiple programming languages such as Java, C#, Python, and Ruby (the core ones). All examplesin this book are written in Selenium with C# binding. As you will see in the examples that follow, the use of Selenium in different bindings is very similar. Once you master one, you can apply it to others quite easily. Take a look at a simple Selenium test script in four different language bindings: C#, Java, Python, and Ruby.

C#

using System;

using OpenQA.Selenium;

using OpenQA.Selenium.Firefox;

using OpenQA.Selenium.Support.UI;

class GoogleSearch

{

static void Main()

{

// Create a new instance of the driver

// Notice that the remainder of the code relies on the interface,

// not the implementation.

IWebDriver driver = new FirefoxDriver();

// And now use this to visit Google

driver.Navigate().GoToUrl(" http://www.google.com ");

// Find the text input element by its name

IWebElement query = driver.FindElement(By.Name("q"));

// Enter something to search for

query.SendKeys("Hello Selenium WebDriver!");

// Submit the form based on an element in the form

query.Submit();

// Check the title of the page

Console.WriteLine(driver.Title);

}

}

Java

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.WebElement;

import org.openqa.selenium.firefox.FirefoxDriver;

public class GoogleSearch {

public static void main(String[] args) {

WebDriver driver = new FirefoxDriver();

driver.get(" http://www.google.com ");

WebElement element = driver.findElement(By.name("q"));

element.sendKeys("Hello Selenium WebDriver!");

element.submit();

System.out.println("Page title is: " + driver.getTitle());

}

}

Python

from selenium import webdriver

driver = webdriver.Firefox()

driver.get(" http://www.google.com ")

elem = driver.find_element_by_name("q")

elem.send_keys("Hello WebDriver!")

elem.submit()

print(driver.title)

Ruby

require "selenium-webdriver"

driver = Selenium::WebDriver.for :firefox

driver.navigate.to " http://www.google.com "

element = driver.find_element(:name, 'q')

element.send_keys "Hello Selenium WebDriver!"

element.submit

puts driver.title

Set up the Development Environment

Most C# programmers develop C# code in Microsoft Visual Studio. I use Visual Studio Community 2015 as the integrated development environment (IDE) of choice for this book, as it is free.

Prerequisites

• Download and install Visual Studio Community 2015.
• Make sure your target browser is installed, such as Chrome or Firefox.

Set up Visual Studio Solution

Create a new project in Visual Studio.

Select Templates Visual C# Test Unit Test Project, as shown in Figure .

Figure 1-1.

Selecting a template for a new Visual Studio project

You will see the project skeleton created, as shown in Figure .

Figure 1-2.

Skeleton for a new project

Add the Selenium WebDriver package to the project.

Run the following command in the Package Manager Console (select Tools NuGet Package Manager Package Manager Console; see Figure ):

Figure 1-3.

Adding a package to a project

PM> Install-Package Selenium.WebDriver

Also install Selenium.Support, which includes helper .NET classes for the Selenium WebDriver application programming interface (API), using this command:

PM> Install-Package Selenium.Support

Figure shows what looks like in Visual Studio Solution Explorer after Selenium WebDriver is installed.

Figure 1-4.

Selenium WebDriver installed in Visual Studio Solution Explorer

Create a test and run it

Add a new C# class (a test).

Essentially a Selenium test in C# is a C# class. Right-click the project name in Solution Explorer, then select Add Unit Test, as shown in Figure .

Figure 1-5.

Adding a unit test

A new unit test file is created (named UnitTest1.cs or UnitTest2.cs if UnitTest1.cs already exists). Rename it (press F2 and enter a name in camel case, such as GoogleSearchTest ), as shown in Figure .

Figure 1-6.

Renaming the new unit test file

Create a test case.

For simplicity, paste a Google Search test case script into the editor, similar to the one shown in Figure .

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