function generate_insert(space)
    -- assume that keys are always unsigned
    local key = random(0, MAX_KEY)
    -- depending on space's format generate corresponding payload
    local data = generate_data(space)
    space:insert({key, data})
end;

INSERT_OP = 0
DELETE_OP = 1
REPLACE_OP = 2
UPSERT_OP = 3
UPDATE_OP = 4
NO_OP = 5

function generate_op(space)
    -- assume no-ops are half of operations
    local op = random(0, NO_OP * 2)
    if op == INSERT_OP then
        generate_insert()
    end;
end;

function generate_ddl(space)
    -- index create/drop, alter etc
end;

function generate_tx()
    if box.is_in_txn() then
        -- commit, rollback or no-op
    else
        box.begin()
    end;
end;

function generate_read()
    -- read random key or start range iteraton
end;

function generate_failure()
    inj = {...}
    -- set one of available injections
end;

-- test takes 10 minutes
test_timer = 10 * 60

function main()
    -- set of spaces with random or predifined attributes:
    -- formats, vinyl options etc.
    spaces = {...}
    init_spaces(spaces)
    local start = os.clock()
    while os.clock() - start < test_timer do
        local space = get_radom_space(spaces)
        -- generate event, operation etc. Note that ratio
        -- between them matters: events should be generated
        -- relatively rarely, meanwhile operations and reads
        -- more frequently.
    end;
end;