Add unit test for http fileloader

api/loader/fileloader.go

@@ -89,6 +89,9 @@ type fileLoader struct {
 	// File system utilities.
 	fSys filesys.FileSystem
 
+	// Used to load from HTTP
+	http *http.Client
+
 	// Used to clone repositories.
 	cloner git.Cloner
 
@@ -296,9 +299,14 @@ func (fl *fileLoader) errIfRepoCycle(newRepoSpec *git.RepoSpec) error {
 // else an error.  Relative paths are taken relative
 // to the root.
 func (fl *fileLoader) Load(path string) ([]byte, error) {
-	if u, err := url.Parse(path); err == nil && strings.HasPrefix(u.Scheme, "http") {
-		client := &http.Client{}
-		resp, err := client.Get(path)
+	if u, err := url.Parse(path); err == nil && (u.Scheme == "http" || u.Scheme == "https") {
+		var hc *http.Client
+		if fl.http != nil {
+			hc = fl.http
+		} else {
+			hc = &http.Client{}
+		}
+		resp, err := hc.Get(path)
 		if err != nil {
 			return nil, err
 		}