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First, let's describe the service itself. Service in Github. The service uses gorilla/mux and Postgres. It implements a clean architecture and has such file structure:
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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testcontainers-go
Testcontainers for Go is a Go package that makes it simple to create and clean up container-based dependencies for automated integration/smoke tests. The clean, easy-to-use API enables developers to programmatically define containers that should be run as part of a test and clean up those resources when the test is done.
testcontainers
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To solve the problem we will use testfixtures. Create a folders fixtures и fixtures/storage and put a file users.yaml inside:
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As you may notice each test has a common part. To optimise our code and avoid duplication we will use testsuites from the testify library. This tool helps us to describe actions we need to take before each test.
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We will use httpmock for this purpose. Inside function setupSuite(), where we created useCase and provided nil as a billingClient now we will pass mocked http client:
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All code samples can be found here