resurrect service stuff

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

function_test.go

@@ -0,0 +1,64 @@
+// +build ignore
+
+package micro
+
+import (
+	"context"
+	"sync"
+	"testing"
+
+	rmemory "github.com/unistack-org/micro-registry-memory"
+	"github.com/unistack-org/micro/v3/util/test"
+)
+
+func TestFunction(t *testing.T) {
+	var wg sync.WaitGroup
+	wg.Add(1)
+
+	r := rmemory.NewRegistry(rmemory.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)
+	}
+}