End-to-End Testing vs. Integration Testing

In this short article, DogQ QA specialists compare end-to-end vs. integration testing in complexity, scope, test coverage, timeline, and final goals.

End-to-End Testing vs. Integration Testing

Navigating the labyrinth of software testing, we stumble upon two intriguing concepts: integration vs. end-to-end testing. Like twins with unique traits, they might seem identical yet are profoundly distinct. Today we’d like to continue the topic we started in the previous article and demystify these testing types to help you grasp all the nuances. Let’s dive in!

Table of contents

The Concept of End-to-End Testing Briefly

End-to-end testing is a way of making sure an app does what it’s supposed to do in real-world scenarios. Instead of focusing on individual parts, e2e testing looks at the app as a whole. It’s the final seal of approval before the app is released to the public.

It’s like a rehearsal before the actual play. The whole cast (the app) goes through the entire script (the real-world scenario) from beginning to end, making sure everything goes smoothly. If something doesn’t work as it should, it’s flagged and fixed.

The Concept of Integration Testing Briefly

Integration Testing is all about making sure that the different parts of an app work well together. In any app, there are multiple components or modules, each designed to perform a specific task. While each of these parts may work well on its own, it’s crucial that they also work well together before the app goes out to the real world.

Let’s say, in our app, one module is responsible for user login, another module handles product search, and yet another takes care of payment processing. Each of these modules is tested individually first, which we call unit testing. But once that’s done, we need to make sure they all play well together.

Thus, integration testing is like a team sport: it doesn’t matter if each player is outstanding individually. What matters is how well they play together as a team to win the game.

End-to-End Testing vs. Integration Testing Comparison

Let’s now directly compare end-to-end testing vs. integration testing in the table below to understand their unique attributes:


E2E Testing

Integration Testing


Tests the entire application as a whole in a real-world scenario.

Tests how different components of the app interact with each other.


High, since it involves the entire system and external interfaces.

Lower than e2e testing, since it focuses on interactions between specific modules.

Testing Coverage

Broad, covering all integrated components and their interaction with the system.

Focused on specific points of interaction between components.

Bug Detection

Identifies issues with system workflows and user experience.

Identifies issues in data transfer between different components.

Execution Time

Longer, due to the comprehensive coverage of the system.

Shorter, as it targets specific interactions.

Which Testing Strategy Do You Need?

As you can see from the table above, the technique you choose really depends on the specific requirements of your project or software However, in most cases, employing both e2e and integration testing is highly beneficial.

Integration testing is valuable early in the development cycle, after unit tests. It ensures the different modules of your software interact well together, catching issues that could arise when these separate parts communicate.

E2E testing, on the other hand, is performed toward the end of the testing cycle. It confirms that the app works flawlessly as a whole in real-world scenarios, ensuring a seamless user experience from start to finish.

So, it’s not really about choosing integration testing vs. end-to-end testing. Both e2e and integration testing have their own place and purpose in the testing pyramid, and they complement each other to ensure a robust, user-friendly application. In short, aim to incorporate both into your testing strategy for comprehensive coverage and a quality end product.

Is integration same as end-to-end?

While e2e testing tests the entire app functionality throughout the entire user journey, integration testing tests the interactions between different components or layers of an app.

What is end-to-end testing vs. integration testing vs. unit testing?

These 3 types of testing are all parts of the testing pyramid, where unit tests are the initial and the simplest part, as they check the smallest testable units, then goes integration testing, which tests how various parts or modules of the app work. And on the top of this pyramid sits e2e testing as the most complex and final testing stage: it tests how the app works throughout the entire user journey.

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