move options to dedicated package

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

config/context_test.go

@@ -40,47 +40,3 @@ func TestNewContext(t *testing.T) {
 		t.Fatal("NewContext not works")
 	}
 }
-
-func TestSetOption(t *testing.T) {
-	type key struct{}
-	o := SetOption(key{}, "test")
-	opts := &Options{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetOption not works")
-	}
-}
-
-func TestSetSaveOption(t *testing.T) {
-	type key struct{}
-	o := SetSaveOption(key{}, "test")
-	opts := &SaveOptions{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetSaveOption not works")
-	}
-}
-
-func TestSetLoadOption(t *testing.T) {
-	type key struct{}
-	o := SetLoadOption(key{}, "test")
-	opts := &LoadOptions{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetLoadOption not works")
-	}
-}
-
-func TestSetWatchOption(t *testing.T) {
-	type key struct{}
-	o := SetWatchOption(key{}, "test")
-	opts := &WatchOptions{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetWatchOption not works")
-	}
-}