next test

Author: Flamefire

test/test_stream_io.cpp

@@ -177,6 +177,34 @@ void test_wide_io()
 
 void test_main(int /*argc*/, char** /*argv*/)
 {
+    {
+        const auto& c = *new std::codecvt_byname<wchar_t, char, std::mbstate_t>("en_US.UTF-8");
+        for(int repeats = 1; repeats <= 1000; repeats++) {
+            std::string one = "\xf0\xa0\x82\x8a"; // U+2008A
+            std::string res;
+            res.reserve(one.size() * repeats);
+            for(int i = 0; i < repeats; i++)
+                res += one;
+            std::locale l("en_US.UTF-8");
+            //&c = std::use_facet<std::codecvt<wchar_t, char, std::mbstate_t>>(l);
+            wchar_t buf[2048];
+            const char* nextIn;
+            wchar_t* nextOut;
+            std::mbstate_t st;
+            c.in(st, res.data(), res.data() + res.size(), nextIn, buf, std::end(buf), nextOut);
+            std::cout << "================= " << repeats << "================\n";
+            std::cout << "Converted " << (nextIn - res.data()) << "/" << res.size() << " bytes to " << (nextOut - buf)
+                      << " wide characters\n";
+            for(int i = 0; i < nextOut - buf; i += 2) {
+                if(buf[i] != 0xD840 || buf[i + 1] != 0xDC8A) {
+                    std::cout << "Mismatch at position " << i << ": " << std::hex << unsigned(buf[i]) << " "
+                              << unsigned(buf[i + 1]) << "\n";
+                    break;
+                }
+            }
+        }
+    }
+    return;
     for(const std::string& backendName : boost::locale::localization_backend_manager::global().get_all_backends()) {
         boost::locale::localization_backend_manager tmp_backend = boost::locale::localization_backend_manager::global();
         tmp_backend.select(backendName);