Improves coverage of GPBCodedInputStream
diff --git a/objectivec/Tests/GPBTestUtilities.h b/objectivec/Tests/GPBTestUtilities.h
index 44c8084..780184b 100644
--- a/objectivec/Tests/GPBTestUtilities.h
+++ b/objectivec/Tests/GPBTestUtilities.h
@@ -39,6 +39,9 @@
 @class TestUnpackedExtensions;
 @class GPBExtensionRegistry;
 
+static inline NSData *DataFromCStr(const char *str) {
+  return [NSData dataWithBytes:str length:strlen(str)];
+}
 
 // Helper for uses of C arrays in tests cases.
 #ifndef GPBARRAYSIZE