Add regression test for enum_to_string with C++ (#838)
diff --git a/tests/regression/issue_838/SConscript b/tests/regression/issue_838/SConscript
new file mode 100644
index 0000000..5646deb
--- /dev/null
+++ b/tests/regression/issue_838/SConscript
@@ -0,0 +1,8 @@
+# Regression test for issue #838:
+# Test enum to string functionality with C++ main program
+
+Import('env')
+env.NanopbProto("enum.proto")
+p = env.Program(["enum_to_string.cxx", "enum.pb.c"])
+env.RunTest(p)
+
diff --git a/tests/regression/issue_838/enum.proto b/tests/regression/issue_838/enum.proto
new file mode 100644
index 0000000..07c6736
--- /dev/null
+++ b/tests/regression/issue_838/enum.proto
@@ -0,0 +1,19 @@
+/* Test enum to string function generation */
+
+syntax = "proto2";
+
+import "nanopb.proto";
+
+option (nanopb_fileopt).enum_to_string = true;
+
+enum MyEnum {
+ VALUE1 = 1;
+ VALUE2 = 2;
+ VALUE15 = 15;
+}
+
+enum MyShortNameEnum {
+ option (nanopb_enumopt).long_names = false;
+ MSNE_VALUE256 = 256;
+}
+
diff --git a/tests/regression/issue_838/enum_to_string.cxx b/tests/regression/issue_838/enum_to_string.cxx
new file mode 100644
index 0000000..2fdcbfb
--- /dev/null
+++ b/tests/regression/issue_838/enum_to_string.cxx
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include "unittests.h"
+#include "enum.pb.h"
+
+int main()
+{
+ int status = 0;
+ TEST(strcmp(MyEnum_name(MyEnum_VALUE1), "VALUE1") == 0);
+ TEST(strcmp(MyEnum_name(MyEnum_VALUE2), "VALUE2") == 0);
+ TEST(strcmp(MyEnum_name(MyEnum_VALUE15), "VALUE15") == 0);
+ TEST(strcmp(MyShortNameEnum_name(MSNE_VALUE256), "MSNE_VALUE256") == 0);
+ TEST(strcmp(MyShortNameEnum_name((MyShortNameEnum)9999), "unknown") == 0);
+
+ if (status != 0)
+ fprintf(stdout, "\n\nSome tests FAILED!\n");
+
+ return status;
+}
+
