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-- Expressions unit tests
context("Rspamd expressions", function()
local rspamd_expression = require "rspamd_expression"
local rspamd_mempool = require "rspamd_mempool"
local rspamd_regexp = require "rspamd_regexp"
local split_re = rspamd_regexp.create('/\\s+|\\)|\\(/')
local function parse_func(str)
-- extract token till the first space character
local token = str
local t = split_re:split(str)
if t then
token = t[1]
end
-- Return token name
return token
end
test("Expression creation function", function()
local function process_func(token, task)
-- Do something using token and task
end
local pool = rspamd_mempool.create()
local cases = {
{'A & B | !C', 'C ! A B & |'},
{'A & (B | !C)', 'A B C ! | &'},
{'A & B &', nil},
-- Unbalanced braces
{'(((A))', nil},
-- Balanced braces
{'(((A)))', 'A'},
-- Plus and comparision operators
{'A + B + C + D > 2', '2 A B C D +(4) >'},
-- Plus and logic operators
{'((A + B + C + D) > 2) & D', 'D 2 A B C D +(4) > &'},
-- Associativity
{'A | B | C & D & E', 'A B C D E &(3) |(3)'},
-- More associativity
{'1 | 0 & 0 | 0', '1 0 0 & 0 |(3)'},
-- Extra space
{'A & B | ! C', 'C ! A B & |'},
}
for _,c in ipairs(cases) do
local expr,err = rspamd_expression.create(c[1],
{parse_func, process_func}, pool)
if not c[2] then
assert_nil(expr, "Should not be able to parse " .. c[1])
else
assert_not_nil(expr, "Cannot parse " .. c[1])
assert_equal(expr:to_string(), c[2], string.format("Evaluated expr to '%s', expected: '%s'",
expr:to_string(), c[2]))
end
end
-- Expression is destroyed when the corresponding pool is destroyed
pool:destroy()
end)
test("Expression process function", function()
local function process_func(token, input)
--print(token)
local t = input[token]
if t then return 1 end
return 0
end
local pool = rspamd_mempool.create()
local atoms = {
A = true,
B = false,
C = true,
D = false,
E = true,
F = false,
}
local cases = {
{'A & B | !C', 0},
{'A & (!B | C)', 1},
{'A + B + C + D + E + F >= 2', 1},
{'((A + B + C + D) > 1) & F', 0},
{'(A + B + C + D) > 1 && F || E', 1},
{'(A + B + C + D) > 100 && F || !E', 0},
{'F && ((A + B + C + D) > 1)', 0},
{'!!C', 1},
}
for _,c in ipairs(cases) do
local expr,err = rspamd_expression.create(c[1],
{parse_func, process_func}, pool)
assert_not_nil(expr, "Cannot parse " .. c[1])
--print(expr)
res = expr:process(atoms)
assert_equal(res, c[2], string.format("Processed expr '%s' returned '%d', expected: '%d'",
expr:to_string(), res, c[2]))
end
pool:destroy()
end)
end)
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