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#1 What is Selenium and its Components

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[Music]

hello friends

today we will discuss on the selenium

and in this tutorial i am going to

explain you about the concept of selenium

selenium

and introduction the components of

selenium was created by jason huggins in

2004 and he was working on a web

application that required frequent testing

testing

so testing the same application multiple

times will consume more time

so to reduce this situation

he has come up with an tool called

javascript test runner and later it was

named as selenium core

and this tool reduces manual effort where

where

in the manual place we has replaced with

the automation tool called selenium core

and selenium is a functional automation

tool that can support a web application

all the web application in the market

can be automated by using the selenium

web driver

and it's an open source tool because of

its open source the most of the it

industries are

working with selenium and selenium can support

support

multiple languages this is one more

advantage where it created a big boom in

the market

so selenium supports java python

ruby pearl c chart and more and can also

support multiple browsers like ie google

chrome mozilla firefox safari and opera

support multiple operating systems like

windows linux mac

the components of selenium the selenium

is mainly built on

four components selenium ide integrated

development environment

selenium rc the remote control

selenium webdriver selenium grid [Music]

[Music]

we'll see selenium ide now selenium ide

is a simple

record playback tool which comes and

add-on for

mozilla firefox now it's also supporting

chrome browser

the person with having no knowledge on the

the

coding can handle this tool very

smoothly because it's a

record and playback which i which is an

add-on for

browsers so once we switch on this ide

and perform

action on the web browser that

interactions are stored in the form of

cellness commands

and entire the scenario is recorded

and we can playback later and the test

cases which are written in ide

can be exported into multiple

programming language and this is an

excellent tool for the beginner to start because

because

there is no coding knowledge required

for this tool because all the syntaxes

which are in the ide

rvt was similar to the selenium web driver

driver

and the commands which is which is in

the ide

are known as cellness commands this

illness commands are

pretty much similar to our web driver commands

commands

selenium rce the remote control selenium

rc was the first tool from the selenium suit

suit

earlier it was known as javascript

astronomer and

rc created a big boom for the selenium

during the market because it supports

the multiple programming languages like

java ruby pearl python c-sharp and

whereas ide

which is a record and playback which can supporting

supporting

for the exporting of the recorded script

but rc supports

the languages to write the commands like

java ruby pearl python chart

and it also support multiple browsers

like mozilla firefox google chrome

internet explorer and all

all the supporting applications which

are developed in the

javascript can be automated by using

this application

whereas ide supports for only mozilla firefox

firefox

and this has this is the main advantage

where rc has created a big famous

for selenium and rc is known as a

serenium one

let's see the architecture of selenium rc

so in selenium rc there is a manual

process called selenium server which is

a mandatory to start

before our execution and this remote

control server acts like

a middleman and

this commands are sent to the server and

it is interpret

the commands which we write in the form

of our

java ruby python perl all these

languages are interpreted in the server

and those interpreted commands are converted

converted

and sent back to browsers and where the

browser's response are again interpreted

back to our

respective local language so this is an

so certainly web driver is the most

important role in selenium suite because

we because of many limitations in the rc

web driver was developed

and it has reduced it has overcome the

manual process like

cell name server in the rc we need to

switch on the selenium server

before the execution and in the web

driver there is a direct communication

between the code and the browsers

if you see the features of selenium

webdriver it supports the multiple

languages multiple browsers

and multiple platforms and

easy to remember apis easy to integrate

the testing frameworks

and parallel testing capabilities if you

see the selenium webdriver architecture

so selenium languages are bindings

like java ruby c-sharp python

so any test cases or any code which we write

write

in these languages are directly sent

in the form of json protocol to the

browser drivers

where the browser drivers are the actual the

the

firefox driver chrome driver safari driver

driver

opera driver and edge driver so these

drivers will pick this json protocol

and these will send the http over http

server for the real browsers

where these commands are executed on the

real browsers

and these real browsers will execute

those commands and will send a response back

back

and this responds back to the browser drivers

drivers

where browser drivers will again give

the response to the actual

code so this is an interaction

in a web driver where we have no

manual intervention like rg where we

need to server

to switch on before house execution so

there is a direct interaction between

the selenium

languages to the real browsers

so this is an architecture of the selenium

selenium

webdriver and selenium grid is used

for distributive testing so it allows us

to execute

the test scripts on the different

machines at the same time

and there is a concept called hub and

node so

nodes are different machines on

different operating system

where those are interconnected with the hub

hub

and the selenium grid gives a good

features like parallel execution on the

multiple nodes

it's a platform independent so we can we

can connect

from many different system like ubuntu linux

linux

mac windows and it's also support

multiple operating

browsers like google chrome

firefox ie safari selenium grid is a

language independent where it can

support multiple languages like java c

sharp python etc and the fast execution

reduces execution time as a test case

are executed parallelly

as the selenium grid follows a hubbard

node concept

where hub is a central system and nodes

are in different machines

and where test cases are executed

parallel in different

machines and which can reduce the time

in executing one by one

as a sequence instead of sequence it

executes the test queries

parallely so the time effort has been

reduced and executing different test cases

cases

as test cases are executed parallely

and if you see the architecture of

selenium grid where hub is a central

system where we have a four nodes

connected and each node

are different platforms like ubuntu

windows mac 100

and the hub sends the command to the nodes

nodes

where nodes execute the actual test

cases and the requests and responses are

two and four with this subband nodes and

this is the architecture of

selenium grid and till now we have seen

the introduction to the selenium and the

components of selenium like

ide rc webdriver and grid

and using the selenium we can achieve

the automation

on the web application testing and

thanks for watching and please share

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YouTube Transcript:
#1 What is Selenium and its Components