Test Resolve Command

[JohnMurray]

Need to add unit-tests to test the running of the resolve command. The following need to be tested:

• Check can resolve divergent chain given 1 of conflicting node (relocates to end of chain)
  • Can resolve with provided ref
  • Can resolve with provided filename
• Check does not resolve when ref or filename given

Note: May need to implement #6 (Version Control Agnosticism) to fully test this command