data:
    - {_id: 1, x: 11}
    - {_id: 2, x: 22}
    - {_id: 3, x: 33}

tests:
    -
        description: "Count without a filter"
        operation:
            name: count
            arguments:
                filter: { }

        outcome:
            result: 3
    -
        description: "Count with a filter"
        operation:
            name: count
            arguments:
                filter: 
                    _id: {$gt: 1}

        outcome:
            result: 2
    -
        description: "Count with skip and limit"
        operation:
            name: count
            arguments:
                filter: {}
                skip: 1
                limit: 3

        outcome:
            result: 2