test if missing update works as expected

test_noupdate.cc

@@ -0,0 +1,29 @@
+// this file is under GNU General Public License 3.0
+// see LICENSE.txt
+
+#include <iostream>
+#include <assert.h>
+#include "downloadclient.cc"
+
+using namespace std;
+using namespace pEp::UpdateClient;
+
+int main()
+{
+    cout << "trying to download...\n";
+
+    // test server only supports serials with leading 23 so this must fail
+    product p { "pEp for Something", "https://fdik.org/cgidownload?hash=42232323234242" };
+
+    try {
+        string filename = update(p, "public.der");
+        cout << "downloaded " << filename << "\n";
+        return 1;
+    }
+    catch (DownloadError&)
+    {
+        cout << "cannot download\n";
+        return 0;
+    }
+}
+

test_updater.cc

@@ -17,12 +17,12 @@ int main()
     try {
         string filename = update(p, "public.der");
         cout << "downloaded " << filename << "\n";
+        return 0;
     }
     catch (DownloadError&)
     {
         cout << "cannot download\n";
+        return 1;
     }
-
-    return 0;
 }