Database Testing Using Selenium Webdriver

As we know every application has to maintain a database like My SQL, Oracle or any other databases to store all its data. And where as Selenium Webdriver is used for testing web applications and we perform many operations like submitting information and some times retrieving information and validate them. Jun 30, 2017  In this post, we will discuss Database testing using selenium webdriver using the connector. You can take data using excel or CSV file as well but some company still use the database to take data from the different database. As we already know, Selenium does not support Database Testing but partially we can do using JDBC and ODBC. We will connect Java program with database and will.

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In our last Selenium tutorial, we learned how to troubleshoot some recurrent problems in selenium scripts. We discussed some advance concepts wherein we would deal with mouse and keyboard events, accessing multiple links by implementing lists.

Moving ahead with our advanced topics in the Selenium training series, we would introduce you with the concept of Database testing using Selenium WebDriver.

We would discuss the basic processes like database connection, executing queries, fetching data and disconnecting database instances etc. We would also discuss various practical implications where we need Database testing with automation testing in order to test the complete end-to-end scenarios.

Propresenter 5 for mac download. Before moving ahead with the technical implications associated with Automated Database testing. Let us discuss a few scenarios where we require performing Database testing along with the Automation Testing. But before that, I would like to affirm here that Database testing is a very peculiar type of testing whereas Selenium WebDriver is a tool used to simulate and automate user interactions with the Application UI.

So technically speaking we are not precisely performing Database Testing rather we are testing our application in conjunction with Database in order to ensure that the changes are reflected at both the ends thereby identifying defects early.

Absolutely all the web applications need a backend to store the Data. Databases like MySQL, Oracle, and SQL Server are reasonably popular these days.

Now motioning back to the original topic, let us discuss a few scenarios to exemplify the demand of Database testing along with Automation Testing.

What You Will Learn:

Consider the following scenarios:

#1) At times, we are required to make sure that the data entered from the UI is consistently reflected in the database. Thus we retrieve the information from the Database and verify the retrieved information against the information supplied from the UI. For example, registration forms, user data, user profiles, updates and deletes of user data. Thus, the test scenario to automate can be “To verify that the user’s information is successfully saved into the database as soon as the user registers in the application”.

#2) Another use case of performing database testing with Selenium WebDriver may arise when the user is directed to load the test data or expected data from the Database. Thus, in such a case, the user would make the connection with the Database using a third party API, execute queries to retrieve data from the dataset and then asserting the data fetched from the Database with the actual data which is populated on the Application UI.

#3) Another use case is to perform associative Database Testing. Assume that we performed an operation on the application’s UI, and we want to test the reflection in the Database. It may be a case that the impacted data resides in various tables of the database due to the association. Therefore it is always advisable to test data reflection at all the impacted areas.

Selenium, as I said, simulates the user interactions with the application under test. It can simulate keyboard events, mouse actions etc. But if the user desires to automate anything outside the vicinity of browser – web application interactions, then selenium can’t be of much help. Thus we require other tools or capabilities to perform end –to –end testing.

Thus, in all the above scenarios, we may require to perform Database Testing along with UI Automation. We may check business logics by manipulating the data and verifying its reflection. We may also check the technical aspects of the Database itself like soft delete, field validation etc.

Let us now move ahead with the actual implementation. Before developing Selenium WebDriver scripts to extract data from the data source, let us create test data in the database. For this tutorial, we would use MySQL as a database.

Creation of test data in the Database

If you haven’t downloaded the database yet, download it using the link – “http://dev.mysql.com/downloads/”. The user is expected to follow some basic steps to download and install the database.

Once the database is successfully installed, the user can launch the MySQL Command Line Prompt which would look like the following screenshot. The application might ask the user to enter the password. The default password is “root”.

Note: User can also find GUI based clients over the internet to connect with the database. To name a few, the user can download and install the Query Browser or Work Bench.

Creation of new Database

The next step is to create the test database with a few tables and records stored in those tables in order to make a connection with the database and execute queries.

Step 1) Type “show databases” to see all the already available databases

show databases;

Step 2) Type “create database user;” to create a database named “user”.

create database user;

Take note that the database name as the user is created and can be seen in the list of databases.

Step 3) Type “use user;” to select the newly created database. Also, type “show tables;” to view all the tables available in the user database.

use user;
show tables;

Take a note that Empty set is shown in the result of the “show tables;” query as there were no tables available within the user database.

Let us now a few tables and add records in them.

Step 4) Type the following command to create a table with 4 fields/columns (userId, userName, userAge, userAddress).

create table userinfo
(
userId int,
userName varchar(255),
userAge int,
userAddress varchar(255)
);

The next step is to add some data records in the “userinfo” table.

Step 5) Type the following command to insert data into the table a table for all the four fields 4 fields/columns (userId, userName, userAge, userAddress).

insert into userinfo (userID, userName, userAge, userAddress) values (‘1', ‘shruti', '25', ‘Noida');

To view the added data, type the following command:

select * from userinfo;

Similarly, you can add more data to your table and can create other tables as well.

Now, that we have created our database. We can move ahead and understand the implementation of automated queries to fetch the records from the database.

As we also iterated earlier, Selenium WebDriver is a tool for UI Automation. Thus, Selenium WebDriver alone is ineligible to perform database testing but this can be done using Java Database Connectivity API (JDBC). The API lets the user connect and interact with the data source and fetch the data with the help of automated queries. To be able to exploit the JDBC API, it is required to have Java Virtual Machine (JVM) running on the system.

JDBC Workflow

We would keep our focus aligned with the following processes:

1. Creating a connection with the database
2. Executing queries and update statements in order to extract/fetch data (CRUD Operations)
3. Using and manipulating the data extracted from the Database in the form of the result set. (Result set is a collection of data organized in the rows and columns)
4. Disconnecting the database connection.

As said earlier, to be able to test database automatically from our Selenium WebDriver test scripts, we would connect with the Database via JDBC connectivity within our test scripts. Post to the connection, we can trigger as many CRUD (Create, Read, Update, and Delete) operations on the Database.

In this tutorial, we would discuss “Read operation and its variants” and about their implementation in Selenium WebDriver script. But prior to that, let us check the test scenario manually using the “MySQL command line”.

Scenario:

1) Open the Database server and connect to the “user” database.

2) List down all the records from the “userinfo” table. Tidal mac app airplay.

Syntax: select * from userinfo;

3) Close the Database connection.

Notice that the read query will list down all the user data present in the userinfo table. The table is consisting of the following columns.

• userId
• username
• userAge
• userAddress

The result also shows that there is only a single data set present within the table.

Now, let us execute the same scenario using the Java Class.

To be able to access Database, the user is leveraged to choose amongst the diverse connector options available to connect with the Database. Most of the database connectors are freely distributed as “jar” files. As we are using MySQL as a data source, therefore we are required to download the jar file specific to MySQL.

The jar file can be downloaded from:here or here.

Step 1: The first and foremost step is to configure the project’s build path and add “mysql-connector-java-3.1.13-bin.jar” file as an external library.

Step 2: Create a java class named as “DatabaseTesingDemo”.

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Database Testing Using Selenium Webdriver Using C#

Step 3: Copy and paste the below code in the class created in the above step.

Code Sample

The output of the above code is:

1 shruti 25 Noida
2 shrivastava 55 Mumbai

Logic pro download mac. Read Statement Variants

Where clause with single condition

String query = “select * from userinfo where userId='” + 1 + “‘”;
ResultSet res = stmt.executeQuery(query);

Output:
1 shruti 25 Noida

Where clause with multiple conditions

Selenium Testing Tutorial

String Address =”Mumbai”;
String query = “select * from userinfo where userId='” + 2 + “‘ and userAddress='”+Address+”‘”;
ResultSet res = stmt.executeQuery(query);

Output:
2 shrivastava 55 Mumbai

Display userId

String query = “select userId from userinfo”;
ResultSet res = stmt.executeQuery(query);

Output:
1
2

Display userId with where clause

String Address =”Noida”;
String query = “select userId,userName from userinfo where userAddress='”+Address+”‘”;
ResultSet res = stmt.executeQuery(query);

Output:
2
shrivastava

Thus, in the same way user can execute various queries on the database.

With this, Let us shed some light on result accessibility methods also.

Result Accessibility Methods:

Method name	Description
String getString()	Method is used to fetch the string type data from the result set
int getInt()	Method is used to fetch the integer type data from the result set
boolean getBoolean()	Method is used to fetch the boolean value from the result set
float getFloat()	Method is used to fetch the float type data from the result set
long getLong()	Method is used to fetch the long type data from the result set
short getShort()	Method is used to fetch the short type data from the result set
double getDouble()	Method is used to fetch the double type data from the result set
Date getDate()	Method is used to fetch the Date type object from the result set

Result Navigation Methods:

Method name	Description
boolean next()	Method is used to move to the next record in the result set
boolean previous()	Method is used to move to the previous record in the result set
boolean first()	Method is used to move to the first record in the result set
boolean last()	Method is used to move to the last record in the result set
boolean absolute(int rowNumber)	Method is used to move to the specific record in the result set

Conclusion

Through this tutorial, we tried to make you acquainted with the concept of Automated Database Testing. We clearly laid emphasis on the technical implications and needs of Database Testing.

As our entire series was focused on Selenium, the reader may get misled and can create an impression that this tutorial would teach to perform Database testing using Selenium, but like I mentioned a number of times earlier, anything that lies outside the periphery of UI testing, cannot be handled by Selenium. Therefore we introduce Java Database Connectivity (JDBC) API in order to perform Database Testing by embedding the code within the Selenium WebDriver scripts.

JDBC makes it possible for the java class to connect to the Database, retrieve data from the database or for the matter of fact perform any of the CRUD operations, manipulate the resultant data and close the connection.

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Thus, the tutorial constitutes the basic sample implementation of the above-mentioned process.

Next Tutorial #29: We will move ahead with advanced Selenium topics. In the next tutorial, we will cover the Selenium GRID – which is used when you have to perform multi-browser testing and you have a large number of test cases.

Recommended Reading

Selenium Webdriver is limited to Testing your applications using Browser. To use Selenium Webdriver for Database Verification you need to use the JDBC ('Java Database Connectivity').

JDBC (Java Database Connectivity) is a SQL level API that allows you to execute SQL statements. It is responsible for the connectivity between the Java Programming language and a wide range of databases. The JDBC API provides the following classes and interfaces

• Driver Manager
• Driver
• Connection
• Statement
• ResultSet
• SQLException

In this tutorial, you will learn

In order to test your Database using Selenium, you need to observe the following 3 steps

1) Make a connection to the Database

In order to make a connection to the database the syntax is

DriverManager.getConnection(URL, 'userid', 'password' )

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• Userid is the username configured in the database
• Password of the configured user
• URL is of format jdbc:< dbtype>://ipaddress:portnumber/db_name'

• <dbtype>- The driver for the database you are trying to connect. To connect to oracle database this value will be 'oracle'

  For connecting to database with name 'emp' in MYSQL URL will bejdbc:mysql://localhost:3036/emp

And the code to create connection looks like You also need to load the JDBC Driver using the code

2) Send Queries to the Database

Once connection is made, you need to execute queries.

You can use the Statement Object to send queries.

Once the statement object is created use the executeQuery method to execute the SQL queries

3) Process the results

Results from the executed query are stored in the ResultSet Object.

Java provides loads of advance methods to process the results. Few of the methods are listed below

Example of Database Testing with Selenium

Step 1) Install MySQL Server and MySQL Workbench

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While installing MySQL Server, please note the database

• Username
• Password
• Port Number

It will be required in further steps.

MySQL Workbench makes it easy to administer the database without the need to code SQL. Though, you can also use the MySQL Terminal to interact with the database.

Step 2) In MySQL WorkBench, connect to your MySQL Server

In the next screen,

1. Select Local Instance of MySQL
2. Enter Port Number
3. Enter Username
4. Enter Password
5. Click OK

Step 3) To Create Database,

1. Click create Schema Button
2. Enter Name of Schema/Database
3. Click Apply

Step 4) In the navigator menu,

1. Click on Tables, beneath the emp database
2. Enter Table name as employee
3. Enter Fields as Name and Age
4. Click Apply

You will see the following pop-up. Click Apply

Step 5) We will create following data

Name	Age
Top	25
Nick	36
Bill	47

To create data into the Table

Selenium Frameworks

1. In navigator, select the employee table
2. In right pane, click Form Editor
3. Enter Name and Age
4. Click Apply

Repeat the process until all data is created

Step 6) Download the MySQL JDBC connector here

Step 7) Add the downloaded Jar to your Project

1. Right click on your Java File. Then click on Build Pathà Configure build path
2. Select the libraries
3. Click on add external JARs
4. You can see MySQL connector java in your library
5. Click on open to add it to the project

Step 8) Copy the following code into the editor

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Selenium For Java

Step 8) Execute the code, and check the output

Summary of Steps for Selenium Database Testing

Step 1) Make a connection to the Database using method.

Step 2) Create Query to the Database using the Statement Object.

Selenium Testing Examples

Step 3) Send the query to database using execute query and store the results in the ResultSet object.

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Java provides lots of built-in methods to process the> SQL Output using the ResultSet Object

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