Embedding Interfaces in Go

Go's interface embedding can simplify unit test mocking. By embedding an interface in a mock struct, you only need to implement the specific methods required for each test, avoiding nil pointer panics for unneeded methods. This keeps mocks tightly scoped to their tests, improves readability, and reduces boilerplate. The post walks through defining a custom interface, implementing it in production code, and then using embedded interfaces to create focused, table-driven test mocks for each function under test.