Module:UnitTests
-- 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, cross local result_table_header = "{|class=\"wikitable\"\n|+ %s\n! !! Text !! Expected !! Actual"
local result_table = { n = 0 } local result_table_mt = { insert = function (self, ...) local n = self.n for i = 1, select('#', ...) do local val = select(i, ...) if val ~= nil then n = n + 1 self[n] = val end end self.n = n end, insert_format = function (self, ...) self:insert(string.format(...)) end, concat = table.concat } result_table_mt.__index = result_table_mt setmetatable(result_table, result_table_mt)
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
local function return_varargs(...) return ... end
function UnitTester:preprocess_equals(text, expected, options)
local actual = frame:preprocess(text)
if actual == expected then
result_table:insert('| ', tick)
else
result_table:insert('| ', cross)
num_failures = num_failures + 1
end
local maybe_nowiki = (options and options.nowiki) and mw.text.nowiki or return_varargs
local differs_at = self.differs_at and (' \n| ' .. first_difference(expected, actual)) or
result_table:insert(' \n| ', mw.text.nowiki(text), ' \n| ',
maybe_nowiki(expected), ' \n| ', maybe_nowiki(actual), 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:insert('| ', tick)
else
result_table:insert('| ', cross)
num_failures = num_failures + 1
end
local maybe_nowiki = (options and options.nowiki) and mw.text.nowiki or return_varargs
local differs_at = self.differs_at and (' \n| ' .. first_difference(expected, actual)) or
result_table:insert(' \n| ', mw.text.nowiki(text1), ' \n| ',
maybe_nowiki(expected), ' \n| ', maybe_nowiki(actual), 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:insert('| ', tick)
else
result_table:insert('| ', cross)
num_failures = num_failures + 1
end
local maybe_nowiki = (options and options.nowiki) and mw.text.nowiki or return_varargs
local differs_at = self.differs_at and (' \n| ' .. first_difference(expected, actual)) or
local display = options and options.display or function(x) return x end
result_table:insert(' \n| ', name, ' \n| ',
maybe_nowiki(tostring(display(expected))), ' \n| ',
maybe_nowiki(tostring(display(actual))), 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:insert('| ', tick)
else
result_table:insert('| ', cross)
num_failures = num_failures + 1
end
local maybe_nowiki = (options and options.nowiki) and mw.text.nowiki or return_varargs
local actual_str = val_to_str(actual)
local expected_str = val_to_str(expected)
local differs_at = self.differs_at and (' \n| ' .. first_difference(expected_str, actual_str)) or
result_table:insert(' \n| ', name, ' \n| ', maybe_nowiki(expected_str),
' \n| ', maybe_nowiki(actual_str), differs_at, "\n|-\n")
end
function UnitTester:iterate(examples, func) require 'libraryUtil'.checkType('iterate', 1, examples, 'table') if type(func) == 'string' then func = self[func] elseif type(func) ~= 'function' then error(("bad argument #2 to 'iterate' (expected function or string, got %s)") :format(type(func)), 2) end
for i, example in ipairs(examples) do if type(example) == 'table' then func(self, unpack(example)) elseif type(example) == 'string' then self:heading(example) else error(('bad example #%d (expected table, got %s)') :format(i, type(example)), 2) end end end
function UnitTester:heading(text) result_table:insert_format(' ! colspan="%u" style="text-align: left" | %s \n |- \n ', self.columns, text) end
function UnitTester:run(frame_arg)
frame = frame_arg
self.frame = frame
self.differs_at = frame.args['differs_at']
tick = frame:preprocess('Template:Tick')
cross = frame:preprocess('Template:Cross')
local table_header = result_table_header
self.columns = 4
if self.differs_at then
table_header = table_header .. ' !! Differs at'
self.columns = self.columns + 1
end
-- Sort results into alphabetical order.
local self_sorted = {}
for key,value in pairs(self) do
if key:find('^test') then
table.insert(self_sorted, key)
end
end
table.sort(self_sorted)
-- Add results to the results table.
for i,value in ipairs(self_sorted) do
result_table:insert_format(table_header .. "\n|-\n", value)
self[value](self)
result_table:insert("|}\n\n")
end
return (num_failures == 0 and "All tests passed." or "" .. num_failures .. " tests failed.") .. "\n\n" .. frame:preprocess(result_table:concat())
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