Module:UnitTests
UnitTests provides a unit test facility that can be used by other scripts using require. Following is an example:
-- Unit tests for [[Module:Bananas]]. Click talk page to run tests.
local p = require('Module:UnitTests')
function p:test_hello()
self:preprocess_equals('Hello, world!', 'Hello World!')
end
return p
This would be executed with {{#invoke: Bananas/testcases | run_tests}}
. Test methods like test_hello above must begin with "test".
MethodsEdit
run_testsEdit
- : Runs all tests. Normally used on talk page of unit tests.
run_tests
{{#invoke:Bananas/testcases|run_tests}}
- If is specified, a column will be added showing the first character position where the expected and actual results differ.
differs_at=1
{{#invoke:Bananas/testcases|run_tests|differs_at=1}}
preprocess_equalsEdit
- : Gives a piece of wikitext to preprocess and an expected resulting value. Scripts and templates can be invoked in the same manner they would be in a page.
preprocess_equals(text, expected, options)
self:preprocess_equals('{{#invoke:Bananas | hello}}', 'Hello, world!',{nowiki=1})
preprocess_equals_manyEdit
- : Performs a series of preprocess_equals() calls on a set of given pairs. Automatically adds the given prefix and suffix to each text.
preprocess_equals_many(prefix, suffix, cases, options)
self:preprocess_equals_many('{{#invoke:BananasArgs | add |', '}}', {
{'2|3', '5'},
{'-2|2', '0'},
},{nowiki=1})
preprocess_equals_preprocessEdit
- : Gives two pieces of wikitext to preprocess and determines if they produce the same value. Useful for comparing scripts to existing templates.
preprocess_equals_preprocess(text, expected, options)
self:preprocess_equals_preprocess('{{#invoke:Bananas | hello}}', '{{Hello}}',{nowiki=1})
preprocess_equals_preprocess_manyEdit
- : Performs a series of preprocess_equals_preprocess() calls on a set of given pairs. The prefix/suffix supplied for both arguments is added automatically. If in any case the second part is not specified, the first part will be used.
preprocess_equals_preprocess_many(prefix, suffix, cases, options)
self:preprocess_equals_preprocess_many('{{#invoke:Foo | spellnum |', '}}', '{{spellnum', '}}', {
{'2'}, -- equivalent to {'2','2'},
{'-2', '-2.0'},
},{nowiki=1})
equalsEdit
- : Gives a computed value and the expected value, and checks if they are equal according to the == operator. Useful for testing modules that are designed to be used by other modules rather than using #invoke.
equals(name, actual, expected, options)
self:equals('Simple addition', 2 + 2, 4,{nowiki=1})
equals_deepEdit
- : Like equals, but handles tables by doing a deep comparison. Neither value should contain circular references, as they are not handled by the current implementation and may result in an infinite loop.
equals_deep(name, actual, expected, options)
self:equals_deep('Table comparison', createRange(1,3), {1,2,3},{nowiki=1})
See alsoEdit
- Module:ScribuntoUnit – alternative unit test module
-- 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! !! 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 maybe_nowiki = (options and options.nowiki) and mw.text.nowiki or function(...) return ... end
local differs_at = self.differs_at and (' \n| ' .. first_difference(expected, actual)) or ''
result_table = result_table .. ' \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 = result_table .. '| ' .. tick
else
result_table = result_table .. '| ' .. cross
num_failures = num_failures + 1
end
local maybe_nowiki = (options and options.nowiki) and mw.text.nowiki or function(...) return ... end
local differs_at = self.differs_at and (' \n| ' .. first_difference(expected, actual)) or ''
result_table = result_table .. ' \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 = result_table .. '| ' .. tick
else
result_table = result_table .. '| ' .. cross
num_failures = num_failures + 1
end
local maybe_nowiki = (options and options.nowiki) and mw.text.nowiki or function(...) return ... end
local differs_at = self.differs_at and (' \n| ' .. first_difference(expected, actual)) or ''
result_table = result_table .. ' \n| ' .. name .. ' \n| ' .. maybe_nowiki(tostring(expected)) .. ' \n| ' .. maybe_nowiki(tostring(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 = result_table .. '| ' .. tick
else
result_table = result_table .. '| ' .. cross
num_failures = num_failures + 1
end
local maybe_nowiki = (options and options.nowiki) and mw.text.nowiki or function(...) return ... end
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 = result_table .. ' \n| ' .. name .. ' \n| ' .. maybe_nowiki(expected_str) .. ' \n| ' .. maybe_nowiki(actual_str) .. 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
-- 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 = result_table .. "\n\n'''" .. value .. "''':\n" .. table_header .. "\n|-\n"
self[value](self)
result_table = result_table .. "|}"
end
return (num_failures == 0 and '<strong style="color:#008000;">All tests passed.</strong>' or '<strong class="error" style="font-size:100%;">' .. num_failures .. ' tests failed.</strong>') .. 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