Software Testing Tutorial #14 - What is System Testing

Summary

This tutorial focuses on system testing in software testing, explaining its importance and role. The speaker highlights how system testing differs from integration testing, where the entire system, such as an e-commerce website, is tested as a whole, rather than just individual components. Using examples from both e-commerce and car manufacturing, the concept of testing the integrated functionalities is clarified. The video also touches on system integration testing for third-party system interactions. It's designed to help viewers understand and confidently explain system testing during interviews.

Takeaways

• 🛠️ System testing involves testing the entire system as a whole, including all integrated modules.
• ⚙️ Unit testing and integration testing focus on smaller parts of the system, while system testing examines the complete functionality.
• 🔐 The example of the login page highlights how integration testing tests multiple integrated units, like username, password, and login button.
• 🌐 System testing goes beyond individual modules, assessing how all parts of an application (like login, registration, dashboard, payments) work together.
• 🚗 The car analogy helps explain system testing: once the car's components (like the engine and wheels) are integrated, the entire car is tested as a whole.
• 🛒 For an e-commerce website, system testing ensures that all functionalities, such as login, registration, and payment, work together as expected.
• 🔗 System integration testing (SIT) involves testing the integration of the system with external systems or third-party platforms.
• 📦 Both system testing and system integration testing fall under the broader category of system testing.
• 💡 System testing ensures the application is tested in a real-world environment with all its functionalities, providing a complete evaluation.
• 🎯 The goal of system testing is to ensure that the entire application works as intended from end to end, with all modules integrated and functional.

Q & A

What is system testing in software testing?

System testing involves testing the entire software system as a whole, ensuring that all integrated components and functionalities work together as expected.

How does system testing differ from integration testing?

Integration testing focuses on testing the interaction between integrated units, while system testing evaluates the entire software system, including all integrated modules and functionalities, as a complete entity.

Can you give an example of system testing using an e-commerce website?

In an e-commerce website, system testing would involve testing the entire application, including registration, login, adding products to the cart, payment processing, and other features, to ensure everything works correctly together.

What analogy is used in the script to explain system testing?

The script uses the example of a car to explain system testing. After assembling and integrating all the car parts like the engine, wheels, and body, system testing would involve testing the entire car as a whole to ensure all components function properly.

What is the role of system integration testing (SIT) in system testing?

System integration testing (SIT) involves testing the interaction between the software system and external systems or third-party integrations, ensuring seamless communication and functionality.

Why is it important to understand system testing in the context of the levels of software testing?

System testing is crucial because it ensures that the entire application functions as expected once all individual modules have been integrated, covering the highest level of testing before release.

How is system testing performed for third-party integrations?

When a system integrates with third-party applications or external systems, system integration testing is performed to ensure that the main system can communicate and interact with external systems without any issues.

What is the difference between unit testing and system testing?

Unit testing focuses on testing individual components or units of code in isolation, while system testing validates the entire system with all modules integrated, ensuring the software functions as a whole.

What kind of test environment is used for system testing?

System testing is typically performed in a test environment where the entire integrated application is deployed. This allows testers to execute end-to-end test cases, simulating real-world use cases.

What key takeaway from the tutorial should be emphasized during software testing interviews?

It's important to understand and explain that system testing involves testing the entire software system with all functionalities integrated, ensuring that the application performs as expected in a real-world scenario.

Outlines

00:00

🔍 Introduction to System Testing and Recap of Previous Concepts

In this paragraph, the presenter introduces the topic of system testing and provides a recap of previously discussed topics, such as unit testing and integration testing. The basics of software testing are briefly mentioned, emphasizing their importance. System testing is introduced as the next level of testing, which involves testing the entire system. Integration testing, where multiple units (e.g., username, password, and login button) are combined and tested as a whole, is also revisited to build context for understanding system testing.

05:03

🛠️ Explanation of System Testing with Examples

Here, the presenter explains system testing in more detail, describing it as testing the system as a whole. The example of an e-commerce website is used to clarify the concept, where different modules (e.g., login, registration, checkout, payments) are integrated and tested together. The comparison between system testing and integration testing is made clear by emphasizing that system testing involves testing all integrated functionalities in the system, whereas integration testing focuses on testing specific unit integrations.

🚗 System Testing Analogy with Car Manufacturing

An analogy between system testing and car manufacturing is provided. The presenter explains how testing individual components like wheels, engines, and other parts in isolation can be compared to integration testing, while system testing involves testing the entire assembled car. The idea is to ensure all parts of the car work together properly. This analogy helps to illustrate how, in system testing, the entire system (like a car or an e-commerce site) is tested to ensure everything functions as intended.

🌐 Introduction to System Integration Testing

In this paragraph, the presenter introduces the concept of system integration testing (SIT). SIT involves testing the integration of the system with third-party or external systems. The example of an e-commerce website integrating with external systems like social media platforms for login functionality is used to explain how such integration requires thorough testing. The presenter notes that system testing can encompass both system testing and system integration testing.

📊 Conclusion and Importance of System Testing

This paragraph summarizes the key points discussed about system testing and system integration testing. The presenter reiterates that system testing involves testing all modules and features of the system after integration. The analogy of the car and the e-commerce website is used to reinforce the idea that testing the complete, integrated system is crucial. The paragraph concludes by encouraging viewers to share and subscribe, highlighting that the information shared is useful for explaining system testing during software testing interviews.

Keywords

💡System Testing

System Testing is the process of testing the entire software system as a whole, ensuring that all modules and components work together as expected. In the video, the speaker explains that system testing involves checking the complete e-commerce website, including login, registration, and other functionalities, to ensure that everything functions correctly when integrated.

💡Integration Testing

Integration Testing refers to testing multiple integrated units or components to verify that they work together. The video uses the example of testing the login functionality after integrating the username, password, and login button components. The purpose is to ensure these integrated parts function as expected before system testing is done.

💡Unit Testing

Unit Testing is a testing level where individual components or units of the software are tested in isolation. In the video, it is mentioned that unit testing focuses on testing small parts of the software, like the login button or username input field, separately before integrating them for further testing stages.

💡Modules

Modules are distinct functionalities or sections of a software application. The video mentions several modules in an e-commerce website, such as login, registration, checkout, and payment. These modules are individually developed and then integrated to form the complete system for system testing.

💡End-to-End Testing

End-to-End Testing refers to testing the flow of an application from start to finish, ensuring that all parts of the system work in unison. In the video, it is highlighted that system testing involves end-to-end testing of the e-commerce website to ensure all integrated functionalities like login, registration, and checkout work together.

💡E-commerce Website

An E-commerce Website is an online platform where users can browse, shop, and make purchases. The video uses the example of an e-commerce website with multiple functionalities such as login, registration, and payment, explaining how these different features are tested during system testing.

💡Test Environment

A Test Environment is a setup where software is deployed for testing purposes, simulating real-world conditions without affecting the live system. The video mentions that system testing is performed on a test environment to verify that the integrated e-commerce website functions correctly before it is deployed live.

💡System Integration Testing

System Integration Testing (SIT) is the process of testing the integration of a system with external or third-party systems. In the video, the speaker explains that SIT is a part of system testing, especially when an e-commerce website integrates with external services like social media platforms for login or payment gateways.

💡Third-party Systems

Third-party Systems refer to external systems or services that a software application interacts with. The video explains how an e-commerce website might integrate with third-party systems like Facebook, Google, or Twitter for login functionality, and the importance of testing these integrations during system integration testing.

💡Software Testing Levels

Software Testing Levels refer to the different stages of testing, such as unit testing, integration testing, and system testing. The video discusses how testing moves from the smaller levels, like unit testing, up to the larger levels like system testing, ensuring that the software is thoroughly tested at each stage.

Highlights

Introduction to system testing as part of the software testing levels.

Recap of previous tutorials covering unit testing and integration testing.

Explanation of integration testing using the example of testing the login page.

Clarification that system testing involves testing the entire system as a whole, not just individual modules.

Example of system testing in an e-commerce website, including modules like login, registration, checkout, and payment.

Detailed mention of login and registration functionalities, with options like email or social media integration (Facebook, Twitter, Google, etc.).

Highlight that system testing ensures all features of an e-commerce site work together as an integrated system.

Comparison of system testing to testing a car, where the fully assembled car is tested for functionality as a whole.

Illustration of how individual components, like the car's wheels and engine, are tested first, followed by system testing of the entire car.

Definition of system testing as evaluating a fully integrated system or product to verify it meets specified requirements.

Mention of system integration testing (SIT) when third-party systems are involved, ensuring seamless integration with external systems.

Clear differentiation between system testing and system integration testing, with both falling under the broader category of system testing.

Emphasis on the importance of system testing in ensuring that all integrated parts function together effectively.

Key takeaway: system testing involves end-to-end testing of an application in a real environment.

Closing remarks encouraging viewers to watch previous tutorials and explaining the importance of system testing in software interviews.

Transcripts

hello everyone welcome again in this

software testing tutorial

we are going to learn what is system

testing

so in the previous two tutorials we have

understood about the

unit testing and integration testing

right and prior to that we have been

learning about the basics of

software testing the levels and now we

are getting deep down into the levels of

testing right so we have covered unit

testing

and integration testing already if you

haven't watched all the previous

tutorial

please go through and watch them because

they are really really important

to build the basics all right now coming

back to the system testing so as we have

understood in the integration testing

when you are integrating multiple units

together and testing

the integrated units that is what

integration testing

is right so for example in this case we

have understood about

the login page where you have the unit

username password and login button

and when you test this as a whole

with valid username password and click

on login button and redirecting to the

dashboard page

or getting the proper error message if

the username and password is invalid

then this is what integration testing is

right

so couple of units integrate together

and you're testing

those couple of integrated units now

when it comes to system testing

system testing is testing system as a

whole

right now in this case if i'm just

testing login functionality of the

overall e-commerce

website that is not the complete system

right complete system is the complete

e-commerce website with

all the functionalities that have been

requested

so ecommerce website can have login

functionality and login even in the

login functionality i can

log in or register using you know email

or i can log in using my social media

account right

so login functionality is one then there

is a

prior to that there is a registration

functionality as well

right so registration

when we when we say register user so the

user can register using email

his email or through the social media

accounts for example

fb uh twitter or

instagram okay

so google so all these

are social media login possibilities or

integration possible on

the registration page so this this is

one of the module the login is another

module dashboard another module check

out payments

add card remote remove card there are so

many

modules or features that will be there

in the overall e-commerce

application or system right once all

these modules are integrated together

and working fine and you are testing

that this is uh you know the integrated

system

as a whole is known as system testing

right

so taking back to the car example i have

tested the wheel so which is integrated

system

all right or integrated you know or

integration testing basically of the

wheels

when i have tested the wheel then i'll

test the integrated

engine right then for the body there

will be you know like testing

once all this is assembled together okay

in the car let me make it a bit small

so say for example this is my

car so this is my car body then the

wheels

are fitted here um you know all the

headlights these are you know like small

units and there could be

even more small units within these small

units um

the window the door everything once

has been built and tested how everything

is you know

integrated and available within the car

once the car is ready and needs to be

tested as a whole

this is what the system testing will do

all about in terms of car

right so when car is ready as a whole

it's

moving and all the you know

functionalities are being implemented

all the parts are being put in place in

the car

and then i'm trying to you know test the

car i'm trying to turn on the engine

and then accelerate i'm trying to you

know

ride the car and see how the performance

i'm trying to break it

that whole testing or testing the car as

a whole

is system testing all right

now taking this same example back

to the e-commerce website when we

integrate all the

functionalities that need to be built on

the e-commerce website that are given by

the customer

all of them are integrated and i'm

testing

that integrated e-commerce website on

the test environment

that has been deployed there and i'm

able to do

end-to-end test cases there with all

the functionalities there then that is

what system testing is all about

now system testing can have system

testing and system integration

testing site as well if say for example

your e-commerce

application integrates with third-party

systems or external systems

then you have to do system integration

testing as well because in that case

your system e-commerce website need to

integrate with third-party system or

external systems as well

so that part needs to be covered in the

system integration testing as well

but in the broader way or in the broader

categorization

system testing is applicable or system

testing is

uh considered for both of those phases

so st and sit are considered as

system testing as a whole right

so that's basically uh you know

how you can understand system testing

and what system testing

is all about um in terms of

the actual car manufacturing example

and the e-commerce website when agree

all these you know systems or all these

modules get integrated in your testing

as a whole

that is what system testing is in

software testing

so that's all for this tutorial hope

this was helpful to

you know for you to understand what

system testing is and

you will be able to explain it easily to

any interviewer

in any of the software testing

interviews so that's all for this

tutorial

please do share and subscribe and thank

you for watching