Value tangle unit tests (#434)

* Feat: initial commit

* Feat: added setPreferred to TransactionMetadata

* Feat: added a Conflicting() method to the transactionMetadata

* Fix: fixed logic bug

* Feat: refactored fcob

* Refactor: refactored additional code

* Fix: fixed a bug in ForeachConsumers

* Refactor: cleaned up code

* Feat: implemented FCOB consensus into the valuetransfer dapp

* Refactor: refactored FCOB

* Docs: added some additional comments

* Docs: fixed comments

* add branch manager conflict test

* cleans failing test

* Refactor: commit before branch change

* Fix: fixed bug in AggregateBranches

* assert aggr. branch IDs

* expands branch conflict detection test

* add visualisation of branch graph of test

* Feat: added PayloadLiked Event

* Refactor: fixed some missing comments + added liked to marshal

* Feat: reworked the preferred and liked propagation

* Refactor: cleaned up some logic

* Refactor: simplified code

* Refactor: cleaned up more stuff :P

* Refactor: refactor

* Feat: moved test + refactored fcob

* adds more tests

* fixes liked state not getting updated correctly of conflict members

* adds additional liked/preferred propagation test

* Fix: fixed missing preferred propagation to aggregated branches

* Fix: fixed a few bugs in liked propagation

* adapt to new hive.go version

* upgrade hive.go

* Feat: started implementing a wallet

* Feat: extended wallet files

* remove weird test

* use mem db for tests

* more tests

* use store backed sequence

* add option to use in-memory database

* address review comments

* First tests for individual components of AttachPayloadSync

* Fix: fixed missing events in branchmanaer

* Feat: propagate changes from branch to transaction

* Add tests for checkTransactionOutputs

* Feat: started implementing confirmed propagation

* Fix: fixed unreachable code

* Add more tests

* Refactor: refactored some code according to wolfgangs review

* Refactor: cleaned up the code according to DRY

* Refactor: refactored according to wollac

* Refactor: refactored according to wollac

* Refactor: refactored according to wollac

* Refactor: refactored the code to make it more readable

* Refactor: added some doc comments + cleaned up some more code

*  adds orderedMap unit tests

*  Fix linter warnings

* test: Add queue unit tests

* Add more tests

*  Adjust imports order

* WIP more tests

*  Add TestBookTransaction

*  Update TestBookTransaction

* Add more tests

*  WIP tests

*  Add TestCalculateBranchOfTransaction

*  Add TestMoveTransactionToBranch

*  Add TestFork

*  Add TestBookPayload

* Add test for checkPayloadSolidity

*  Add TestSetTransactionPreferred

* Add more tests

*  Fix Tangle test

* Feat: started implementing lucas test cases

* Feat: fixed some issued + further tests

* Feat: started adding invalid txs check

* Feat: added removal logic for invalid transactions

* Refactor: removed Println

*  Add test for 2nd Reattachment

*  Add aggregated branches test cases

* Feat: added a method to generate AggregatedBranchIDs

*  Use GenerateAggregatedBranchID in test

* Feat: refactored delete logic

* Fix: fixed broken test

* Feat: added final test cases for invalid txs / payloads

* 

 WIP

* Value tangle concurrency tests (#451)

* Add simple concurrency test

* Add reverse and concurrent transaction and value object solidification tests and fix bug when value object was visited more than once

* Add some documentation to make tests easily understandable

* WIP propagation tests but fixed already couple of bugs

* Fix: fixed some bugs

* Feat: added propagation to inclusion states to tx and its outputs

* Feat: finished the propagation down to the tx and its outputs

* WIP propagation tests and fix bugs

* Feat: fixed some issues and introduced a Debugger

* Refactor: added a few comments

* Split massive test file into slightly more digestible chunks

* Clean up propagation tests

* Feat: fixed bugs

* Feat: enabled missing tests

* Add some documentation and missing checks for aggregated branches

* Clean up tangle tests

* Fix: finalized wasn't propagated when a branch was rejected

* WIP debugging concurrency bug of death

* Feat: added more reliable fails in test case

* Fix: fixes a race condition in solidification

* Clean up test

Co-authored-by: Hans Moog <hm@mkjc.net>
Co-authored-by: Luca Moser <moser.luca@gmail.com>
Co-authored-by: Wolfgang Welz <welzwo@gmail.com>
Co-authored-by: capossele <angelocapossele@gmail.com>
Co-authored-by: jkrvivian <jkrvivian@gmail.com>