add test for mock/store.go

mock/store_test.go

@@ -0,0 +1,33 @@
+package mock
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	dbm "github.com/tendermint/tmlibs/db"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+func TestStore(t *testing.T) {
+	db := dbm.NewMemDB()
+	cms := NewCommitMultiStore(db)
+
+	key := sdk.NewKVStoreKey("test")
+	cms.MountStoreWithDB(key, sdk.StoreTypeIAVL, db)
+	err := cms.LoadLatestVersion()
+	assert.Nil(t, err)
+
+	store := cms.GetKVStore(key)
+	assert.NotNil(t, store)
+
+	k := []byte("hello")
+	v := []byte("world")
+	assert.False(t, store.Has(k))
+	store.Set(k, v)
+	assert.True(t, store.Has(k))
+	assert.Equal(t, v, store.Get(k))
+	store.Delete(k)
+	assert.False(t, store.Has(k))
+}