feat: workspace helpers - quoting paths, what a dropped file does, with node tests

internal/server/server.go

@@ -434,6 +434,11 @@ func assetHashes(fsys fs.FS) map[string]string {
 func staticHandler(fsys fs.FS, hashes map[string]string) http.Handler {
 	files := http.FileServer(http.FS(fsys))
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// The JS tests sit beside the scripts but are not served.
+		if strings.HasSuffix(r.URL.Path, ".test.js") {
+			http.NotFound(w, r)
+			return
+		}
 		h := hashes[strings.TrimPrefix(r.URL.Path, "/")]
 		if h != "" {
 			w.Header().Set("ETag", `"`+h+`"`)