gRPC
gRPC services are harder to test than REST APIs. HTTP endpoints accept plain JSON you can curl in seconds; gRPC uses binary Protobuf encoding over HTTP/2 and requires generated client code to send requests. This complexity shows up in your test setup. This guide covers a complete gRPC testing
Go
Table-driven tests are Go's idiomatic approach to testing multiple input/output combinations.
Go
testify is the most popular Go testing library. It provides three main packages: assert for fluent assertions, require for fail-fast assertions, mock for interface mocking, and suite for test organization. While the standard testing package is sufficient for simple cases, testify makes complex test suites significantly more readable. Installation
Go
Go ships with a built-in testing package that requires no third-party dependencies. The go test command finds and runs tests automatically.
Go
Unit tests verify logic in isolation. Integration tests verify that components work together: your code + database, your service + external API, your handler + middleware stack. Go's testing package supports both, and the patterns for integration testing are as idiomatic as those for unit testing. Separating Integration Tests Mark slow
Go
Go's testing package includes a built-in benchmark system. Benchmarks measure how long code takes to run and how much memory it allocates.
Go
Mocking in Go is interface-based. You define an interface, generate a mock implementation, and use it in tests to control behavior and verify interactions.