v3 refactor (#1868)

* Move to v3

Co-authored-by: Ben Toogood <bentoogood@gmail.com>

function_test.go

@@ -1,63 +0,0 @@
-package micro
-
-import (
-	"context"
-	"sync"
-	"testing"
-
-	proto "github.com/micro/go-micro/v2/debug/service/proto"
-	"github.com/micro/go-micro/v2/registry/memory"
-	"github.com/micro/go-micro/v2/util/test"
-)
-
-func TestFunction(t *testing.T) {
-	var wg sync.WaitGroup
-	wg.Add(1)
-
-	r := memory.NewRegistry(memory.Services(test.Data))
-
-	// create service
-	fn := NewFunction(
-		Registry(r),
-		Name("test.function"),
-		AfterStart(func() error {
-			wg.Done()
-			return nil
-		}),
-	)
-
-	// we can't test fn.Init as it parses the command line
-	// fn.Init()
-
-	ch := make(chan error, 2)
-
-	go func() {
-		// run service
-		ch <- fn.Run()
-	}()
-
-	// wait for start
-	wg.Wait()
-
-	// test call debug
-	req := fn.Client().NewRequest(
-		"test.function",
-		"Debug.Health",
-		new(proto.HealthRequest),
-	)
-
-	rsp := new(proto.HealthResponse)
-
-	err := fn.Client().Call(context.TODO(), req, rsp)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if rsp.Status != "ok" {
-		t.Fatalf("function response: %s", rsp.Status)
-	}
-
-	if err := <-ch; err != nil {
-		t.Fatal(err)
-	}
-}