add more tests for stores (#446)

core/stores/redis/scriptcache_test.go

@@ -0,0 +1,16 @@
+package redis
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestScriptCache(t *testing.T) {
+	cache := GetScriptCache()
+	cache.SetSha("foo", "bar")
+	cache.SetSha("bla", "blabla")
+	bar, ok := cache.GetSha("foo")
+	assert.True(t, ok)
+	assert.Equal(t, "bar", bar)
+}