Secret implementation of config. Supporting config merge (#2027)

Co-authored-by: Asim Aslam <asim@aslam.me>

config/store/store_test.go

@@ -0,0 +1,119 @@
+package store
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/micro/go-micro/v3/config"
+	"github.com/micro/go-micro/v3/config/secrets"
+	"github.com/micro/go-micro/v3/store/memory"
+)
+
+type conf1 struct {
+	A string  `json:"a"`
+	B int64   `json:"b"`
+	C float64 `json:"c"`
+	D bool    `json:"d"`
+}
+
+func TestBasics(t *testing.T) {
+	conf, err := NewConfig(memory.NewStore(), "micro")
+	if err != nil {
+		t.Fatal(err)
+	}
+	testBasics(conf, t)
+	// We need to get a new config because existing config so
+	conf, err = NewConfig(memory.NewStore(), "micro1")
+	if err != nil {
+		t.Fatal(err)
+	}
+	secrets, err := secrets.NewSecrets(conf, "somethingRandomButLongEnough32by")
+	if err != nil {
+		t.Fatal(err)
+	}
+	testBasics(secrets, t)
+}
+
+func testBasics(c config.Config, t *testing.T) {
+	original := &conf1{
+		"Hi", int64(42), float64(42.2), true,
+	}
+	err := c.Set("key", original)
+	if err != nil {
+		t.Fatal(err)
+	}
+	getted := &conf1{}
+	val, err := c.Get("key")
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = val.Scan(getted)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !reflect.DeepEqual(original, getted) {
+		t.Fatalf("Not equal: %v and %v", original, getted)
+	}
+
+	// Testing merges now
+	err = c.Set("key", map[string]interface{}{
+		"b": 55,
+		"e": map[string]interface{}{
+			"e1": true,
+		},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	m := map[string]interface{}{}
+	val, err = c.Get("key")
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = val.Scan(&m)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expected := map[string]interface{}{
+		"a": "Hi",
+		"b": float64(55),
+		"c": float64(42.2),
+		"d": true,
+		"e": map[string]interface{}{
+			"e1": true,
+		},
+	}
+	if !reflect.DeepEqual(m, expected) {
+		t.Fatalf("Not equal: %v and %v", m, expected)
+	}
+
+	// Set just one value
+	expected = map[string]interface{}{
+		"a": "Hi",
+		"b": float64(55),
+		"c": float64(42.2),
+		"d": true,
+		"e": map[string]interface{}{
+			"e1": float64(45),
+		},
+	}
+	err = c.Set("key.e.e1", 45)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	m = map[string]interface{}{}
+	val, err = c.Get("key")
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = val.Scan(&m)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !reflect.DeepEqual(m, expected) {
+		t.Fatalf("Not equal: %v and %v", m, expected)
+	}
+}