assertions for log files

[Tieske]

Quite common we need to validate behaviour by checking log files. Some helper assertions would be nice.

Issues:

• applications don't always restart with clean logs in-between tests; so a start marker would be necessary
• log file might not exist when start marker is called?
• assertions for "contains"
• needs filename where to look

local logfile = require "luassert.logfile"

it("checks a log file", function()
    local log = logfile("./logs/error.log")   -- sets a start marker (file size?), should not fail if file doesn't exist

    -- do stuff 

    assert.logfile(log).exists()
    assert.logfile(log).contains("some Lua pattern", [occurrences])
end)

[DorianGray]

not a bad idea! how about just "file" though?