Modul:UnitTests

Moduldokumentasjon

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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})

local UnitTester = {}

local frame, tick, cross
local result_table = "{|class=\"wikitable\"\n! !! Text !! Expected !! Actual\n|-\n"
local num_failures = 0

function preprocess_equals(text, expected)
    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
    result_table = result_table .. ' || <nowiki>' .. text:gsub('%|', '&#124;') .. '</nowiki> || ' .. expected .. ' || ' .. actual .. "\n|-\n"
end

function UnitTester:run_tests(frame_arg)
    frame = frame_arg
    tick = frame:preprocess('{{Tick}}')
    cross = frame:preprocess('{{Cross}}')
    
    for key,value in pairs(p) do
        if key:find('^test') then value() end
    end

    result_table = result_table .. "|}"
    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