CTA test data can be found at https://ftp.nyse.com/ contained under following directory structure.

  CQSB Quote messages : cta_playback_test_data/cqs/
  CTSB Trade messages : cta_playback_test_data/cts/
  CTSB Index messages : cta_playback_test_data/index/

Message formats in these output binary test files conform to CTA Technical specs hosted at https://www.ctaplan.com/tech-specs
Each message starts with a 20 bytes BlockHeader as described in respective output spec (e.g. CTS section 3.5)

List of message contents within the test file with corresponding spec section in spec documents for reference.
    
    File : cta_playback_test_data/cqs/cqs_playback_test: (refer to CQS Output spec)
        cqtsbo.StartOfDay           ==> Section 6.2.1  
        cqtsbo.SymbolReferenceData  ==> Section 6.1.1
        cqtsbo.LineIntegrity        ==> Section 6.2.6
        cqtsbo.LongQuote            ==> Section 6.4.2
        cqtsbo.AuctionStatusQuote   ==> Section 6.4.1
        
    File : cta_playback_test_data/cts/cts_playback_test: (refer to CTS Output spec)
        cqtsbo.StartOfDay                      ==> Section 6.2.1  
        cqtsbo.SymbolReferenceData             ==> Section 6.1.5
        cqtsbo.LineIntegrity                   ==> Section 6.2.4
        cqtsbo.FractionalPriorDayTrade         ==> Section 6.5.4
        cqtsbo.FractionalPriorDayTradeCancel   ==> Section 6.5.6
        cqtsbo.FractionalPriorDayTradeCorr     ==> Section 6.5.2
        cqtsbo.FractionalLongTrade             ==> Section 6.7.5
        cqtsbo.FracApproxAdjVolMktCenter       ==> Section 6.4.3
        cqtsbo.FractionalConsolidatedEODSummary==> Section 6.6.4
        cqtsbo.FractionalParticipantEODSummary ==> Section 6.6.6
        cqtsbo.ConsolidatedSODSummary          ==> Section 6.6.1
        cqtsbo.ParticipantSODSummary           ==> Section 6.6.2
        cqtsbo.AuctionStatusTrade              ==> Section 6.7.1
        cqtsbo.StartOfEOD                      ==> Section 6.1.1
        cqtsbo.EndOfEOD                        ==> Section 6.1.2
        cqtsbo.EndOfDay                        ==> Section 6.2.5
        cqtsbo.TradingStatus                   ==> Section 6.7.6

    File : cta_playback_test_data/index/index_playback_test: (refer to CTS Output spec)
        cqtsbo.StartOfDay                      ==> Section 6.2.1  
        cqtsbo.SymbolReferenceData             ==> Section 6.1.5
        cqtsbo.LineIntegrity                   ==> Section 6.2.4
        cqtsbo.BidOfferIndex                   ==> Section 6.3.2
        cqtsbo.Index                           ==> Section 6.3.1