new test for streaming and struct changes and additions

internal/cache/refresh.go

@@ -3,10 +3,10 @@ package cache
 import "path/filepath"
 
 func (c *Cache) Refresh() error {
-	if !c.mu.TryLock() {
+	if !c.refreshMu.TryLock() {
 		return nil
 	}
-	defer c.mu.Unlock()
+	defer c.refreshMu.Unlock()
 
 	for _, repo := range c.cfg.mirroredRepos {
 		if err := c.refreshDB(repo); err != nil {
@@ -19,7 +19,7 @@ func (c *Cache) Refresh() error {
 func (c *Cache) refreshDB(repo string) error {
 	dbFile := repo + ".db.tar.gz"
 	dbPath := filepath.Join(repo, "os/x86_64", dbFile)
-	err := c.fetch(dbPath)
+	err := c.getStream(dbPath)
 	if err != nil {
 		return err
 	}