Differences between Interface and Integration Testing

Interface Testing:
Interface Testing is a type of software testing type that checks the proper communication between two different software systems. Interface is the connection that integrates two components. The interface could be anything like APIs, web services etc. Testing of these connecting interfaces is defined as Interface Testing.
An interface is actually a software that consists of sets of commands, messages and other attributes that enable communication between a device and a user.

Integration Testing:
Integration testing is the process of testing the interface between two software units or module. The focus of integration testing is on determining the correctness of the interface. Integration testing exposes faults in the interaction between integrated units. After the unit testing of all the modules, integration testing is performed.

Integration Testing is the type of software testing where software modules are integrated logically and tested as a group. A typical software project consists of multiple software modules that are coded by different programmers. Integration Testing focuses on verifying data communication among these modules.

Below is the differences between Interface and Integration testing:

Interface Testing Integration Testing
Interface testing is carried out to test an interface to verify the expected result. Integration testing is performed to verify the end to end functionality of the integrated components.
Interface testing is tricky and boring. Integration testing is easy but lengthy.
Interface testing is mostly automated. Integration testing is manual and automation both.
Interface testing is performed only on the code. Integration testing is performed on both code and GUI of the application.
Interface testing is done on interfaces like APIs, web services, connection strings etc. Integration testing is done on integrated components.

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