# 1. One commodity. Zero accounts should be elided but the final total should not.
bin/hledger -f - balance
<<<
2010/04/01 tr1
  a   16$
  b   -16$

2010/04/02 tr2
  a   -16$
  b   16$
>>>
--------------------
                   0
>>>=0

# 2. Two commodities. As above, and the final total should be a single commodityless zero.
bin/hledger -f - balance
<<<
2010/1/1
  a   16$ @@ 10€
  b   -10€
2010/1/2
  a   -16$
  b   10€ @@ 16$
>>>
--------------------
                   0
>>>=0