Hands-On Software Engineering with Golang

Leveraging gomock to write a unit test for our application

Now that we are aware of the implementation details of our example project, we can go ahead and write a simple, mock-based unit test for it. Before we begin, we need to create a mock for the API interface. This can be achieved by invoking the mockgen tool with the following options:

$ mockgen \
    -destination mock/dependency.go \
    github.com/PacktPublishing/Hands-On-Software-Engineering-with-Golang/Chapter04/dependency \
    API

The preceding command does the following:

• Creates a mock folder in the dependency package
• Generates a file called dependency.go with the appropriate code for mocking the API interface and places it in the mock folder

To save you the trouble of having to manually ...