What are Microservices?

What are Microservices?

What are Microservices?

Micro Services is a buzz word now a days a and people usually question what exactly are this microservices and how to test them.

So in this article, we will try to understand what is MicroServices and what are the different strategies to test them.

Well before going into depth of Micro Services we need to understand what exactly is Monolithic Architecture that prevailed before the introduction of Micro Services.

What is Monolithic Architecture

Image result for Monolithic Architecture
Monolithic Architecture

Below are some of the important aspects of Monolithic Architecture

Ø application is built using a single code base.
Ø Application is further divided into multiple modules.
Ø These Large monolithic codebases are complex and hard to understand.
Ø If a new developer is getting started with it, he/she will be facing challenges to understand itself.
Ø As these are from the single code base, they need a single build.
Ø And the build time will also be high, it will keep on increasing with the addition of new features.

Issues with Monolithic Architecture

Ø UnScaling- Scaling the application will be very challenging as each time application needs to be updated even for smaller changes.

Ø Once if the application is done, it will be very difficult to change language or framework because everything is tightly coupled.

Ø Slow Development-It takes a lot of time to built since for any changes each and everything has to be built sequentially.

Ø Continuous integration and deployment will be complex with larger build times.

Ø  If there is any problem with code in a module, this may lead to failure of the entire system.

Ø  if you want to handle this problem, you need to build the entire application and deploy it entirely.

What are MicroServices

It is an architectural style that structures an application as a collection of services that are
  • Highly maintainable and testable
  • Loosely coupled
  • Independently deployable
  • Organized around business capabilities
  • Owned by a small team
The microservice architecture enables the rapid, frequent and reliable delivery of large, complex applications. It also enables an organization to evolve its technology stack.
MicroService Architecture
Some of the important features include:
  • This contains small individual modules for each service.
  • Each service will be implementing a use-case.
  • As these are independent, they will be very small and loosely coupled.
  • Beauty of microservices is that each of the services can be having different codebases.
    • JAVA
    • Python
    • Java Script
    • PHP etc.

  • As these services are independent, they can be independent built and deploy.
  • So, if there are any changes needed to be done in any service, We can deploy only that service build unlike the entire build in a monolithic architecture.
  • Because of these flexibilities, we can develop and deploy services independent to each other.
  • Developers need not have a complete picture of the entire project.
  • They can only concentrate on the service they are working, which is very flexible to new employees.
  • Maintaining several small teams for different services are flexible.

Popular Microservices Testing Strategies 

1)     Unit Testing

      Please refer to this link to Know more about Unit Testing.

2)     Integration Testing

      Please refer to this link to Know more about Integration Testing.

3)     End to End Testing

      Please refer to this link to Know more about End to End Testing.

All the above Strategies i already have covered into different articles so instead of going in-depth just sharing the links for easy references.



My Name is Ankur Jain and I am currently working as Automation Test Architect.I am ISTQB Certified Test Manager,Certified UI Path RPA Developer as well as Certified Scrum Master with total 12 years of working experience with lot of big banking clients around the globe.I love to Design Automation Testing Frameworks with Selenium,Appium,Protractor,Cucumber,Rest-Assured, Katalon Studio and currently exploring lot in Dev-OPS as well. I am currently staying in Mumbai, Maharashtra. Please Connect with me through Contact Us page of this website.

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