New for 2.1
Supporting other coding styles/formats
old format: describe "title" "$( ... )"
alt format: describe "title" && { ... } (most readable but variables are not locally scoped)
alt format2: describe "title" && ( ... ) (compromise?)
Assertions on expressions
[[ some_expression ]]
should_succeed
[[ some_expression ]]
should_fail
Cleaner support for arrays and vars - pass by reference
expect_var varname to_be 5
expect_array arrayname to_contain 5
Unofficial bash strict mode
http://redsymbol.net/articles/unofficial-bash-strict-mode/