Functions count, empty, exits incorrect for empty collections.

[piotrszul]

count(), empty() and exists() return {} for explicit empty collections while they should return 0, true and false respecttively.

(Existence exclusions)

Details

Expected: false but got: null ==> expected: <false> but was: <null>

• Functions.nothing.exists() [** exists for undefined coll should return false]
• Functions.nothing.attr.exists($this < 0) [** exists with criteria should work for not exists coll ]

Expected: true but got: null ==> expected: <true> but was: <null>

• Functions.nothing.empty() [** empty nothing]

Details

Expected: 0 but got: null ==> expected: <0> but was: <null>

• Functions.ups.count() [** 0 if nothing]