add 2 helper methods for building KVPair(s)

types/kvpair.go

@@ -0,0 +1,19 @@
+package types
+
+// KVPairInt is a helper method to build KV pair with an integer value.
+func KVPairInt(key string, val int64) *KVPair {
+	return &KVPair{
+		Key:       key,
+		ValueInt:  val,
+		ValueType: KVPair_INT,
+	}
+}
+
+// KVPairString is a helper method to build KV pair with a string value.
+func KVPairString(key, val string) *KVPair {
+	return &KVPair{
+		Key:         key,
+		ValueString: val,
+		ValueType:   KVPair_STRING,
+	}
+}

types/kvpair_test.go

@@ -0,0 +1,15 @@
+package types
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestKVPairInt(t *testing.T) {
+	assert.Equal(t, KVPairInt("a", 1), &KVPair{Key: "a", ValueType: KVPair_INT, ValueInt: 1})
+}
+
+func TestKVPairString(t *testing.T) {
+	assert.Equal(t, KVPairString("a", "b"), &KVPair{Key: "a", ValueType: KVPair_STRING, ValueString: "b"})
+}