Editing Module:UnitTests/doc (section)

== Methods ==
=== run_tests ===
* {{code|1=run_tests}}: Runs all tests. Normally used on talk page of unit tests. <syntaxhighlight lang="wikitext">
{{#invoke:Example/testcases|run_tests}}
</syntaxhighlight>
* If {{code|1=differs_at}} is specified, a column will be added showing the first character position where the expected and actual results differ. <syntaxhighlight lang="wikitext">
{{#invoke:Example/testcases|run_tests|differs_at=1}}
</syntaxhighlight>
* If {{code|1=highlight}} is specified, failed tests will be highlighted to make them easier to spot. A [[WP:USERSCRIPT|user script]] that [[User:Fred_Gandt/moveFailedModuleTestsToTop.js|moves failed tests to the top]] is also available. <syntaxhighlight lang="wikitext">
{{#invoke:Example/testcases|run_tests|highlight=1}}
</syntaxhighlight>
* If {{code|1=live_sandbox}} is specified, the header will show the columns "Test", "Live", "Sandbox", "Expected". This is required when using the {{code|1=preprocess_equals_sandbox_many}} method.

=== preprocess_equals ===
* {{code|1=preprocess_equals(text, expected, options)}}: 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. <syntaxhighlight lang="lua">
self:preprocess_equals('{{#invoke:Example | hello}}', 'Hello, world!', {nowiki=1})
</syntaxhighlight>

=== preprocess_equals_many ===
* {{code|1=preprocess_equals_many(prefix, suffix, cases, options)}}: Performs a series of preprocess_equals() calls on a set of given pairs. Automatically adds the given prefix and suffix to each text. <syntaxhighlight lang="lua">
self:preprocess_equals_many('{{#invoke:Example | hello_to |', '}}', {
    {'John', 'Hello, John!'},
    {'Jane', 'Hello, Jane!'},
}, {nowiki=1})
</syntaxhighlight>

=== preprocess_equals_preprocess ===
* {{code|1=preprocess_equals_preprocess(text, expected, options)}}: Gives two pieces of wikitext to preprocess and determines if they produce the same value. Useful for comparing scripts to existing templates. <syntaxhighlight lang="lua">
self:preprocess_equals_preprocess('{{#invoke:Example | hello}}', '{{Hello}}', {nowiki=1})
</syntaxhighlight>

=== preprocess_equals_preprocess_many ===
* {{code|1=preprocess_equals_preprocess_many(prefix1, suffix1, prefix2, suffix2, cases, options)}}: 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. <syntaxhighlight lang="lua">
self:preprocess_equals_preprocess_many('{{#invoke:ConvertNumeric | numeral_to_english|', '}}', '{{spellnum', '}}', {
    {'2'}, -- equivalent to {'2','2'},
    {'-2', '-2.0'},
}, {nowiki=1})
</syntaxhighlight>

=== preprocess_equals_sandbox_many ===
* {{code|1=preprocess_equals_sandbox_many(module, function, cases, options)}}: Performs a series of preprocess_equals_compare() calls on a set of given pairs. The test compares the live version of the module vs the /sandbox version and vs an expected result. Ensure live_sandbox is specified or there may be some errors in the output. <syntaxhighlight lang="lua">
self:preprocess_equals_sandbox_many('{{#invoke:Example', 'hello_to', {
    {'John', 'Hello, John!'},
    {'Jane', 'Hello, Jane!'},
}, {nowiki=1})
</syntaxhighlight>

=== equals ===
* {{code|1=equals(name, actual, expected, options)}}: 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. <syntaxhighlight lang="lua">
self:equals('Simple addition', 2 + 2, 4, {nowiki=1})
</syntaxhighlight>

=== equals_deep ===
* {{code|1=equals_deep(name, actual, expected, options)}}: 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. <syntaxhighlight lang="lua">
self:equals_deep('Table comparison', createRange(1,3), {1,2,3}, {nowiki=1})
</syntaxhighlight>