Module:UnitTests
Documentation for this module may be created at Module:UnitTests/doc
-- UnitTester provides unit testing for other Lua scripts. For details see [[Wikipedia:Lua#Unit_testing]].
-- For user documentation see talk page.
local UnitTester = {}
local frame, tick='{{done}}'
local cross='{{not done}}'
local result_table_header = "{|class=\"wikitable\"\n! !! Text !! Expected !! Actual"
local result_table = ''
local num_failures = 0
function first_difference(s1, s2)
if s1 == s2 then return '' end
local max = math.min(#s1, #s2)
for i = 1, max do
if s1:sub(i,i) ~= s2:sub(i,i) then return i end
end
return max + 1
end
function UnitTester:preprocess_equals(text, expected, options)
local actual = frame:preprocess(text)
if actual == expected then
result_table = result_table .. '| ' .. tick
else
result_table = result_table .. '| ' .. cross
num_failures = num_failures + 1
end
local nowiki_open = (options and options.nowiki) and '<nowiki>' or ''
local nowiki_close = (options and options.nowiki) and '</nowiki>' or ''
local differs_at = self.differs_at and (' || ' .. first_difference(expected, actual)) or ''
result_table = result_table .. ' || <nowiki>' .. text:gsub('%|', '|') .. '</nowiki> || ' .. nowiki_open .. expected .. nowiki_close .. ' || ' .. nowiki_open .. actual .. nowiki_close .. differs_at .. "\n|-\n"
end
function UnitTester:preprocess_equals_many(prefix, suffix, cases, options)
for _, case in ipairs(cases) do
self:preprocess_equals(prefix .. case[1] .. suffix, case[2], options)
end
end
function UnitTester:preprocess_equals_preprocess(text1, text2, options)
local actual = frame:preprocess(text1)
local expected = frame:preprocess(text2)
if actual == expected then
result_table = result_table .. '| ' .. tick
else
result_table = result_table .. '| ' .. cross
num_failures = num_failures + 1
end
local nowiki_open = (options and options.nowiki) and '<nowiki>' or ''
local nowiki_close = (options and options.nowiki) and '</nowiki>' or ''
local differs_at = self.differs_at and (' || ' .. first_difference(expected, actual)) or ''
result_table = result_table .. ' || <nowiki>' .. text1:gsub('%|', '|') .. '</nowiki> || ' .. nowiki_open .. expected .. nowiki_close .. ' || ' .. nowiki_open .. actual .. nowiki_close .. differs_at .. "\n|-\n"
end
function UnitTester:preprocess_equals_preprocess_many(prefix1, suffix1, prefix2, suffix2, cases, options)
for _, case in ipairs(cases) do
self:preprocess_equals_preprocess(prefix1 .. case[1] .. suffix1, prefix2 .. (case[2] and case[2] or case[1]) .. suffix2, options)
end
end
function UnitTester:equals(name, actual, expected, options)
if actual == expected then
result_table = result_table .. '| ' .. tick
else
result_table = result_table .. '| ' .. cross
num_failures = num_failures + 1
end
local nowiki_open = (options and options.nowiki) and '<nowiki>' or ''
local nowiki_close = (options and options.nowiki) and '</nowiki>' or ''
local differs_at = self.differs_at and (' || ' .. first_difference(expected, actual)) or ''
result_table = result_table .. ' || ' .. name .. ' || ' .. nowiki_open .. expected .. nowiki_close .. ' || ' .. nowiki_open .. actual .. nowiki_close .. differs_at .. "\n|-\n"
end
local function deep_compare(t1, t2, ignore_mt)
local ty1 = type(t1)
local ty2 = type(t2)
if ty1 ~= ty2 then return false end
if ty1 ~= 'table' and ty2 ~= 'table' then return t1 == t2 end
local mt = getmetatable(t1)
if not ignore_mt and mt and mt.__eq then return t1 == t2 end
for k1, v1 in pairs(t1) do
local v2 = t2[k1]
if v2 == nil or not deep_compare(v1, v2) then return false end
end
for k2, v2 in pairs(t2) do
local v1 = t1[k2]
if v1 == nil or not deep_compare(v1, v2) then return false end
end
return true
end
function val_to_str(v)
if type(v) == 'string' then
v = mw.ustring.gsub(v, '\n', '\\n')
if mw.ustring.match(mw.ustring.gsub(v, '[^\'"]', ''), '^"+$') then
return "'" .. v .. "'"
end
return '"' .. mw.ustring.gsub(v, '"', '\\"' ) .. '"'
else
return type(v) == 'table' and table_to_str(v) or tostring(v)
end
end
function table_key_to_str(k)
if type(k) == 'string' and mw.ustring.match(k, '^[_%a][_%a%d]*$') then
return k
else
return '[' .. val_to_str(k) .. ']'
end
end
function table_to_str(tbl)
local result, done = {}, {}
for k, v in ipairs(tbl) do
table.insert(result, val_to_str(v))
done[k] = true
end
for k, v in pairs(tbl) do
if not done[k] then
table.insert(result, table_key_to_str(k) .. '=' .. val_to_str(v))
end
end
return '{' .. table.concat(result, ',') .. '}'
end
function UnitTester:equals_deep(name, actual, expected, options)
if deep_compare(actual, expected) then
result_table = result_table .. '| ' .. tick
else
result_table = result_table .. '| ' .. cross
num_failures = num_failures + 1
end
local nowiki_open = (options and options.nowiki) and '<nowiki>' or ''
local nowiki_close = (options and options.nowiki) and '</nowiki>' or ''
local actual_str = val_to_str(actual)
local expected_str = val_to_str(expected)
local differs_at = self.differs_at and (' || ' .. first_difference(expected_str, actual_str)) or ''
result_table = result_table .. ' || ' .. name .. ' || ' .. nowiki_open .. expected_str .. nowiki_close .. ' || ' .. nowiki_open .. actual_str .. nowiki_close .. differs_at .. "\n|-\n"
end
function UnitTester:run(frame_arg)
frame = frame_arg
self.frame = frame
self.differs_at = frame.args['differs_at']
tick = frame:preprocess('{{Tick}}')
cross = frame:preprocess('{{Cross}}')
local table_header = result_table_header
if self.differs_at then
table_header = table_header .. ' !! Differs at'
end
for key,value in pairs(self) do
if key:find('^test') then
result_table = result_table .. "'''" .. key .. "''':\n" .. table_header .. "\n|-\n"
value(self)
result_table = result_table .. "|}\n\n"
end
end
return (num_failures == 0 and "<font color=\"#008000\">'''All tests passed.'''</font>" or "<font color=\"#800000\">'''" .. num_failures .. " tests failed.'''</font>") .. "\n\n" .. frame:preprocess(result_table)
end
function UnitTester:new()
local o = {}
setmetatable(o, self)
self.__index = self
return o
end
local p = UnitTester:new()
function p.run_tests(frame) return p:run(frame) end
return p