-(void)testiPhoneSDK312NSKeyedArchiver
{
//  prepare a NSCachedURLResponse
    NSCachedURLResponse *src = nil;
    {
        NSURL *i_url = [NSURL URLWithString:@"http://www.url.example/path/file.html"];
        NSString *i_mime = @"text/html";
        NSInteger expectedContentLength = 112;
        NSString *i_encoding = @"iso-8859-2";
 
        NSURLResponse *i_response = [[NSURLResponse alloc] initWithURL:i_url
            MIMEType:i_mime
            expectedContentLength:expectedContentLength
            textEncodingName:i_encoding];
        NSData *i_data = [@"Hello, world!" dataUsingEncoding:NSISOLatin2StringEncoding];
        NSURLCacheStoragePolicy i_storage =  NSURLCacheStorageAllowed;
        NSDictionary *i_userInfo = [NSDictionary dictionaryWithObject:
        [NSDate dateWithTimeIntervalSince1970:13] forKey:@"era"];
 
        NSCachedURLResponse *src = [[NSCachedURLResponse alloc] initWithResponse:i_response
            data:i_data
            userInfo:i_userInfo
            storagePolicy:i_storage];
 
//      ensure it's all in place:
        STAssertEqualObjects(i_url, src.response.URL, @"");
        STAssertEqualObjects(i_mime, src.response.MIMEType, @"");
        STAssertEquals((int)expectedContentLength, (int)src.response.expectedContentLength, @"");
        STAssertEqualObjects(@"file.html", src.response.suggestedFilename, @"");
        STAssertEqualObjects(i_encoding, src.response.textEncodingName, @"");
 
        STAssertEqualObjects(i_data, src.data, @"");
        STAssertEqualObjects(i_userInfo, src.userInfo, @"");
        STAssertEquals( 0u, src.storagePolicy, @"");
    }
 
//  archive + unarchive:
    NSCachedURLResponse *dst = [NSKeyedUnarchiver unarchiveObjectWithData:
      [NSKeyedArchiver archivedDataWithRootObject:src]];
 
//  check whether src == dst
    STAssertEqualObjects(src.response.URL, dst.response.URL, @"");
    STAssertEqualObjects(src.response.MIMEType, dst.response.MIMEType, @"");
    STAssertEquals(src.response.expectedContentLength, dst.response.expectedContentLength, @"");
    STAssertEqualObjects(src.response.suggestedFilename, dst.response.suggestedFilename, @"");
    STAssertEqualObjects(src.response.textEncodingName, dst.response.textEncodingName, @"");
 
//  !!!!!!!!!!
//  sad information loss after unarchiving:
    STAssertNil( dst.data, @"" );
    STAssertNil( dst.userInfo, @"" );
    STAssertEquals( 2u , dst.storagePolicy, @"" );
}