feat(testutil): add testutil pkg to generate sample objects (#10)

* add testutil pkg to generate sample objects

* add unit test

Author: Pantani

testutil/sample/sample.go

@@ -0,0 +1,13 @@
+package sample
+
+import (
+	"github.com/cosmos/cosmos-sdk/crypto/keys/ed25519"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+// AccAddress returns a sample account address
+func AccAddress() string {
+	pk := ed25519.GenPrivKey().PubKey()
+	addr := pk.Address()
+	return sdk.AccAddress(addr).String()
+}

testutil/sample/sample_test.go

@@ -0,0 +1,15 @@
+package sample
+
+import (
+	"testing"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAccAddress(t *testing.T) {
+	got := AccAddress()
+	require.NotEmpty(t, got)
+	_, err := sdk.AccAddressFromBech32(got)
+	require.NoError(t, err)
+}