-- Unit tests for [[Module:TimeAgo]]. Click talk page to run tests. local p = require('Module:UnitTests')  function p:test_main()  local lang = mw.language.getContentLanguage()   -- Calculate the time since/until the test dates here, since the expected output is dependent on the current time in most cases.  local currentTime = lang:formatDate( 'U' )  local jul09 = currentTime - lang:formatDate( 'U', '1 July 2009' )  local secondssincejul09 = math.floor( jul09 )  local minutessincejul09 = math.floor( jul09 / 60 )  local dayssincejul09 = math.floor( jul09 / 86400 )  local weekssincejul09 = math.floor( jul09 / 604800 )  local monthssincejul09 = math.floor( jul09 / 2678400 )  local yearssincejul09 = math.floor( jul09 / 31557600 )  local monthssincesep13 = math.floor( ( currentTime - lang:formatDate( 'U', '15 September 2013' ) ) / 2678400 )  local monthsuntiljul49 = math.floor( ( lang:formatDate ( 'U', '1 July 2049' ) - currentTime ) / 2678400 )  local yearsuntilaug57 = math.floor( ( lang:formatDate ( 'U', '4 August 2057' ) - currentTime ) / 31557600 )   self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|15 September 2013}}', monthssincesep13 .. ' months ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|{{CURRENTTIMESTAMP}}}}', '0 seconds ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|15 September 2013|purge=yes}}', monthssincesep13 .. ' months ago <span class="plainlinks">([//en.wikipedia.org/w/index.php?title=Module_talk:TimeAgo/testcases&action=purge purge])</span>')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|{{CURRENTTIMESTAMP}}|purge=yes}}', '0 seconds ago <span class="plainlinks">([//en.wikipedia.org/w/index.php?title=Module_talk:TimeAgo/testcases&action=purge purge])</span>')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|July 1 2009}}', yearssincejul09 .. ' years ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|July 1 2009|magnitude=minutes}}', minutessincejul09 .. ' minutes ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|July 1 2009|magnitude=days}}', dayssincejul09 .. ' days ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|July 1 2009|magnitude=weeks}}', weekssincejul09 .. ' weeks ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|July 1 2009|magnitude=months}}', monthssincejul09 .. ' months ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|July 1 2049|magnitude=months}}', monthsuntiljul49 .. ' months\' time')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|Julio 1}}', '<strong class="error">Error: first parameter cannot be parsed as a date or time.</strong>')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|July 1 2009|magnitude=fruits}}', secondssincejul09 .. ' seconds ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main}}', '0 seconds ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|July 1 2009|magnitude=HoUrS}}', secondssincejul09 .. ' seconds ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|4 August 2057}}', yearsuntilaug57 .. ' years\' time')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|15 September 2013|ago=in the past}}', monthssincesep13 .. ' months in the past')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|{{CURRENTTIMESTAMP}}|min_magnitude=weeks}}', '0 weeks ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|15 September 2013|ago=}}', monthssincesep13 .. ' months')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|{{#time: r | -12 months -14 days}}|magnitude=months|spellout=yes}}', 'twelve months ago') -- #time always gives one month too few  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|{{#time: r | -12 months -14 days}}|magnitude=months|spellout=y}}', 'twelve months ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|{{#time: r | -12 months -14 days}}|magnitude=months|spellout=y|spelloutmax=11}}', '12 months ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|{{#time: r | -12 months -14 days}}|magnitude=months|spellout=auto}}', '12 months ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|{{#time: r | -4 years -14 days}}|magnitude=years|spellout=auto}}', 'four years ago')  self:preprocess_equals('{{#invoke:TimeAgo/sandbox|main|July 1 2009|magnitude=weeks|spellout=yes}}', weekssincejul09 .. ' weeks ago') -- [[Module:NumberSpell]] can only spell numbers up to 100.  self:preprocess_equals_preprocess('{{#invoke:TimeAgo/sandbox|main|{{REVISIONTIMESTAMP}}|magnitude=days}}', '{{#expr:floor(({{LOCALTIMESTAMP}}-{{REVISIONTIMESTAMP}})/86400)}} days ago')  self:preprocess_equals_preprocess('{{#invoke:TimeAgo/sandbox|main|{{REVISIONTIMESTAMP}}|magnitude=hours}}', '{{#expr:floor(({{LOCALTIMESTAMP}}-{{REVISIONTIMESTAMP}})/3600)}} hours ago')  self:preprocess_equals_preprocess('{{#invoke:TimeAgo/sandbox|main|{{REVISIONTIMESTAMP}}|magnitude=minutes}}', '{{#expr:floor(({{LOCALTIMESTAMP}}-{{REVISIONTIMESTAMP}})/60)}} minutes ago')  self:preprocess_equals_preprocess('{{#invoke:TimeAgo/sandbox|main|{{REVISIONTIMESTAMP}}|magnitude=seconds}}', '{{#expr:floor(({{LOCALTIMESTAMP}}-{{REVISIONTIMESTAMP}}))}} seconds ago') end  return p