1) reducer SELECT_MISSION handles SELECT_MISSION:
     TypeError: undefined is not a function
      at isValidMission (core.js:112:38)
      at selectMission (core.js:72:9)
      at reducer (reducer.js:12:11)
      at Context.<anonymous> (reducer_spec.js:72:22)

  2) reducer SELECT_MISSION only allows the correct number of players on the mission:
     TypeError: undefined is not a function
      at isValidMission (core.js:112:38)
      at selectMission (core.js:72:9)
      at reducer (reducer.js:12:11)
      at Context.<anonymous> (reducer_spec.js:97:22)

  3) reducer RECORD_MISSION_ACTION handles RECORD_MISSION_ACTION bad vote:
     TypeError: Cannot read property 'missionAction' of undefined
      at reducer (reducer.js:18:38)
      at Context.<anonymous> (reducer_spec.js:237:21)

  4) reducer RECORD_ASSASSIN_ACTION handles correct choice:
     TypeError: Cannot read property 'choice' of undefined
      at reducer (reducer.js:22:33)
      at Context.<anonymous> (reducer_spec.js:255:22)

  5) reducer RECORD_ASSASSIN_ACTION handles incorrect choice:
     TypeError: Cannot read property 'choice' of undefined
      at reducer (reducer.js:22:33)
      at Context.<anonymous> (reducer_spec.js:267:22)