Add Dag unitTest

[wenlinlee]

[codecov[bot]]

Codecov Report

Base: 73.31% // Head: 60.95% // Decreases project coverage by -12.36% :warning:

Coverage data is based on head (9a6353c) compared to base (2637a8f). Patch coverage: 100.00% of modified lines in pull request are covered.

:exclamation: Current head 9a6353c differs from pull request most recent head 334ee50. Consider uploading reports for the commit 334ee50 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #2811       +/-   ##
===========================================
- Coverage   73.31%   60.95%   -12.37%     
===========================================
  Files         667      377      -290     
  Lines       56575    21405    -35170     
===========================================
- Hits        41480    13048    -28432     
+ Misses      15095     8357     -6738     

Impacted Files	Coverage Δ
...rs-protocol/protocol/TransactionSubmitResultImpl.h	17.50% <ø> (ø)
...-txpool/bcos-txpool/txpool/storage/MemoryStorage.h	100.00% <ø> (ø)
...xpool/bcos-txpool/txpool/storage/MemoryStorage.cpp	64.16% <100.00%> (+1.35%)	:arrow_up:
...cos-protocol/bcos-protocol/ParallelMerkleProof.cpp	40.74% <0.00%> (-55.82%)	:arrow_down:
...ocol/bcos-protocol/protobuf/PBTransactionFactory.h	47.36% <0.00%> (-52.64%)	:arrow_down:
...s-protocol/bcos-tars-protocol/protocol/BlockImpl.h	31.57% <0.00%> (-51.48%)	:arrow_down:
...-framework/bcos-framework/ledger/LedgerInterface.h	50.00% <0.00%> (-50.00%)	:arrow_down:
...-crypto/bcos-crypto/signature/fastsm2/fast_sm2.cpp	20.38% <0.00%> (-45.66%)	:arrow_down:
bcos-codec/bcos-codec/wrapper/CodecWrapper.h	55.00% <0.00%> (-45.00%)	:arrow_down:
bcos-tool/VersionConverter.h	0.00% <0.00%> (-43.48%)	:arrow_down:
... and 504 more

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