Commit f3f5b3fb authored by Thomas Van Lenten's avatar Thomas Van Lenten

Add tests to ensure we read strings with BOMs so we don't forget about lessons of the past.

parent 89719f07
...@@ -295,4 +295,42 @@ ...@@ -295,4 +295,42 @@
XCTAssertEqualObjects(@"", message.defaultString); XCTAssertEqualObjects(@"", message.defaultString);
} }
- (void)testBOMWithinStrings {
// We've seen servers that end up with BOMs within strings (not always at the
// start, and sometimes in multiple places), make sure they always parse
// correctly. (Again, this is inpart incase a custom string class is ever
// used again.)
const char* strs[] = {
"\xEF\xBB\xBF String with BOM",
"String with \xEF\xBB\xBF in middle",
"String with end bom \xEF\xBB\xBF",
"\xEF\xBB\xBF\xe2\x99\xa1", // BOM White Heart
"\xEF\xBB\xBF\xEF\xBB\xBF String with Two BOM",
};
for (size_t i = 0; i < GPBARRAYSIZE(strs); ++i) {
NSOutputStream* rawOutput = [NSOutputStream outputStreamToMemory];
GPBCodedOutputStream* output =
[GPBCodedOutputStream streamWithOutputStream:rawOutput];
int32_t tag = GPBWireFormatMakeTag(TestAllTypes_FieldNumber_DefaultString,
GPBWireFormatLengthDelimited);
[output writeRawVarint32:tag];
size_t length = strlen(strs[i]);
[output writeRawVarint32:(int32_t)length];
[output writeRawData:[NSData dataWithBytes:strs[i] length:length]];
[output flush];
NSData* data =
[rawOutput propertyForKey:NSStreamDataWrittenToMemoryStreamKey];
GPBCodedInputStream* input = [GPBCodedInputStream streamWithData:data];
TestAllTypes* message = [TestAllTypes parseFromCodedInputStream:input
extensionRegistry:nil
error:NULL];
XCTAssertNotNil(message, @"Loop %zd", i);
// Ensure the string is there. NSString can consume the BOM in some
// cases, so don't actually check the string for exact equality.
XCTAssertTrue(message.defaultString.length > 0, @"Loop %zd", i);
}
}
@end @end
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