[tests] Rewrite resource loading test

Make it more readable and easier to debug.

1 files changed, 9 insertions, 0 deletions

diff --git a/include/mbgl/util/string.hpp b/include/mbgl/util/string.hpp
index 9e2b2d8819..bc6b3b1eff 100644
--- a/include/mbgl/util/string.hpp
+++ b/include/mbgl/util/string.hpp
@@ -22,6 +22,15 @@ inline std::string toString(int8_t num) {
     return boost::lexical_cast<std::string>(int(num));
 }
 
+inline std::string toString(std::exception_ptr error) {
+    try {
+        std::rethrow_exception(error);
+    } catch (const std::exception& ex) {
+        return ex.what();
+    } catch (...) {
+        return "Unknown exception type";
+    }
+}
 
 template<size_t max, typename... Args>
 inline std::string sprintf(const char *msg, Args... args) {