Modul:UnitTests
Moduldokumentasjon
UnitTests provides a unit test facility that can be used by other scripts using require. See en:Wikipedia:Lua#Unit_testing for details. Following is a sample from Module:Bananas/testcases:
-- Unit tests for [[Module:Bananas]]. Click talk page to run tests.
local p = require('Module:UnitTests')
function p:test_hello()
self:preprocess_equals('{{#invoke:Bananas | hello}}', 'Hello, world!')
end
return p
The talk page Module talk:Bananas/testcases executes it with {{#invoke: Bananas/testcases | run_tests}}. Test methods like test_hello above must begin with "test".
Methods
run_tests
run_tests(differs_at): Runs all tests. If "differs_at=1" is specified, a column will be added showing the first character position where the expected and actual results differ. Normally used on talk page of unit tests.
{{#invoke:Bananas/testcases|run_tests}}
preprocess_equals
preprocess_equals(text, expected): 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.
self:preprocess_equals('{{#invoke:Bananas | hello}}', 'Hello, world!')
preprocess_equals_many
preprocess_equals_many(prefix, suffix, cases): Performs a series of preprocess_equals() calls on a set of given pairs. Automatically adds the given prefix and suffix to each text.
self:preprocess_equals_many('{{#invoke:BananasArgs | add |', '}}', {
{'2|3', '5'},
{'-2|2', '0'},
})
preprocess_equals_preprocess
preprocess_equals_preprocess(text, expected): Gives two pieces of wikitext to preprocess and determines if they produce the same value. Useful for comparing scripts to existing templates.
self:preprocess_equals_preprocess('{{#invoke:Bananas | hello}}', '{{Hello}}')
preprocess_equals_preprocess_many
preprocess_equals_preprocess_many(prefix, suffix, cases): 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.
self:preprocess_equals_preprocess_many('{{#invoke:Foo | spellnum |', '}}', '{{spellnum', '}}', {
{'2'}, -- equivalent to {'2','2'},
{'-2', '-2.0'},
})
equals
equals(name, actual, expected): 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.
self:equals('Simple addition', 2 + 2, 4)
equals_deep
equals_deep(name, actual, expected): 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.
self:equals_deep('Table comparison', createRange(1,3), {1,2,3})
See also
-- 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 !! Differs at\n|-\n"
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 ''
result_table = result_table .. ' || <nowiki>' .. text:gsub('%|', '|') .. '</nowiki> || ' .. nowiki_open .. expected .. nowiki_close .. ' || ' .. nowiki_open .. actual .. nowiki_close .. ' || ' .. first_difference(expected, actual) .. "\n|-\n"
end
function UnitTester:preprocess_equals_many(prefix, suffix, cases, options)
for i, 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 ''
result_table = result_table .. ' || <nowiki>' .. text:gsub('%|', '|') .. '</nowiki> || ' .. nowiki_open .. expected .. nowiki_close .. ' || ' .. nowiki_open .. actual .. nowiki_close .. ' || ' .. first_difference(expected, actual) .. "\n|-\n"
end
function UnitTester:preprocess_equals_preprocess_many(prefix1, suffix1, prefix2, suffix2, cases, options)
for i, 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:run(frame_arg)
frame = frame_arg
self.frame = frame
tick = frame:preprocess('{{Tick}}')
cross = frame:preprocess('{{Cross}}')
for key,value in pairs(self) do
if key:find('^test') then
result_table = result_table .. "'''" .. key .. "''':\n" .. result_table_header
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