Module:ScribuntoUnit/doc: Difference between revisions

Revision as of 11:50, 5 December 2013

Revision as of 20:33, 31 December 2013

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This module provides [[unit test]]s for other [[WP:Lua|Lua]] modules. To test a module, you must create a separate test module, usually located at <code>Module:''Module name''/testcasestesttilfeller</code>. The module is tested with the ScribuntoUnit module, which verifies that the operations defined in the test module produce the expected results.

== Test module structure ==

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=== assertEquals ===

This tests whether the first parameter is equal to the second parameter. If both parameters are numbers, the values are instead compared using {{code|assertWithinDelta}} with delta 1e-8 (0.00000001) since numbers are represented as [[floating point]]s with limited precision.

<source lang="lua">

self:assertEquals(4, calculator.add(2, 2))

</source>

=== assertWithinDelta ===

For two numbers, this tests whether the first is within a given distance (delta) from the second. This is useful to compare floating point numbers. While

1/3 == 9/3 evaluates as false, the two numbers can be compared as being within a very small distance (delta) of each other.

<source lang="lua">

self:assertEquals(1/3, calculator.divide(9/3), 1e-10)

</source>