Improves coverage of GPBCodedInputStream

1 files changed, 10 insertions, 4 deletions

diff --git a/objectivec/Tests/GPBMessageTests+Serialization.m b/objectivec/Tests/GPBMessageTests+Serialization.m
index 4a4c5447..55d77a1f 100644
--- a/objectivec/Tests/GPBMessageTests+Serialization.m
+++ b/objectivec/Tests/GPBMessageTests+Serialization.m
@@ -42,10 +42,6 @@
 #import "google/protobuf/UnittestRuntimeProto2.pbobjc.h"
 #import "google/protobuf/UnittestRuntimeProto3.pbobjc.h"
 
-static NSData *DataFromCStr(const char *str) {
-  return [NSData dataWithBytes:str length:strlen(str)];
-}
-
 @interface MessageSerializationTests : GPBTestCase
 @end
 
@@ -980,6 +976,16 @@ static NSData *DataFromCStr(const char *str) {
   XCTAssertEqual(error.code, GPBCodedInputStreamErrorRecursionDepthExceeded);
 }
 
+- (void)testParseDelimitedDataWithNegativeSize {
+  NSData *data = DataFromCStr("\xFF\xFF\xFF\xFF\x0F");
+  GPBCodedInputStream *input = [GPBCodedInputStream streamWithData:data];
+  NSError *error;
+  [GPBMessage parseDelimitedFromCodedInputStream:input
+                               extensionRegistry:nil
+                                           error:&error];
+  XCTAssertNil(error);
+}
+
 #ifdef DEBUG
 - (void)testErrorMissingRequiredField {
   NSData *data = DataFromCStr("");