add config

config/source/memory/options.go

@@ -0,0 +1,32 @@
+package memory
+
+import (
+	"context"
+
+	"github.com/micro/go-micro/config/source"
+)
+
+type changeSetKey struct{}
+
+// WithChangeSet allows a changeset to be set
+func WithChangeSet(cs *source.ChangeSet) source.Option {
+	return func(o *source.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, changeSetKey{}, cs)
+	}
+}
+
+// WithData allows the source data to be set
+func WithData(d []byte) source.Option {
+	return func(o *source.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, changeSetKey{}, &source.ChangeSet{
+			Data:   d,
+			Format: "json",
+		})
+	}
+}