func TestMyFunction(t *testing.T) { result, err := MyFunction() if err != nil { t.Error("MyFunction returned an error:", err) } if result != expected { t.Error("Unexpected result returned:", result) } }In this example, the `TestMyFunction` test case calls a function `MyFunction` and checks its return value. If there is an error or the return value is unexpected, the test fails and generates an error message. The `TB` interface is part of the standard `testing` package in Go.