move options to dedicated package

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

options/options_test.go

@@ -0,0 +1,86 @@
+package options_test
+
+import (
+	"testing"
+
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/options"
+)
+
+func TestAddress(t *testing.T) {
+	var err error
+
+	type s struct {
+		Address []string
+	}
+
+	src := &s{}
+	var opts []options.Option
+	opts = append(opts, options.Address("host:port"))
+
+	for _, o := range opts {
+		if err = o(src); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	if src.Address[0] != "host:port" {
+		t.Fatal("failed to set Address")
+	}
+}
+
+func TestCodecs(t *testing.T) {
+	var err error
+
+	type s struct {
+		Codecs map[string]codec.Codec
+	}
+
+	src := &s{}
+	var opts []options.Option
+	c := codec.NewCodec()
+	opts = append(opts, options.Codecs("text/html", c))
+
+	for _, o := range opts {
+		if err = o(src); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	for k, v := range src.Codecs {
+		if k != "text/html" || v != c {
+			continue
+		}
+		return
+	}
+
+	t.Fatalf("failed to set Codecs")
+}
+
+func TestLabels(t *testing.T) {
+	type str1 struct {
+		Labels []string
+	}
+	type str2 struct {
+		Labels []interface{}
+	}
+
+	x1 := &str1{}
+
+	if err := options.Labels("one", "two")(x1); err != nil {
+		t.Fatal(err)
+	}
+	if len(x1.Labels) != 2 {
+		t.Fatal("failed to set labels")
+	}
+	x2 := &str2{}
+	if err := options.Labels("key", "val")(x2); err != nil {
+		t.Fatal(err)
+	}
+	if len(x2.Labels) != 2 {
+		t.Fatal("failed to set labels")
+	}
+	if x2.Labels[0] != "key" {
+		t.Fatal("failed to set labels")
+	}
+}