Key Difference between Unit testing vs Integration testing. Unit testing is a testing method by which individual units of source code are tested to determine if they are ready to use, whereas Integration testing checks integration between software modules. A key difference between unit testing and integration testing is the number of components involved. Now let’s look deeper into these concepts. Table of Contents What is Unit Test? What is an Integration Test? Big-bang Approach Incremental Approach Key Differences between Unit Test and Integration Test 1. Granularity One of the main differences between unit testing and integration testing lies in their granularity. Unit testing is fine-grained, focusing on individual units or components of the software. It’s the first level of software testing and is carried out during the development phase. In contrast, integration testing is coarse-grained. Testing 1. Introduction Tasting an apple is different from tasting an apple pie. Although the apple is still the main ingredient, an apple pie integrates several other elements that create a new and complex flavor. Unlike unit testing, integration testing considers side effects from the beginning. These side effects may even be desirable. For example, an integration test could use the connection to a database (a dependency in unit testing) to query and mutate the database as it usually would. ulsGBcj.

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