Editing Module:Val/units/doc (section)

== Testing a new unit ==

To test a ''newly added'' unit not used on any page, you will need to run the preview on a sandbox page you have already created. Here are all the test cases you can preview there before saving your changes here; they are the four {{para|u}} parameters:
<syntaxhighlight lang="wikitext">
{{Val|9|u =            }}
{{Val|9|ul =           }}
{{Val|9|u=foo|up =     }}
{{Val|9|u=foo|upl =    }}
</syntaxhighlight>

and the [[Help:Table#Sortable_tables|sortable table]]:

<syntaxhighlight lang="wikitext">
{| class="wikitable sortable" summary="Sortable table to test Val sorting"
! Val number and unit
|-
| {{val|5|u=      }} 
|-
| {{val|3|u=      }} 
|-
| {{val|1|u=      }} 
|-
| {{val|2|u=      }} 
|-
| {{val|4|u=      }} 
|}
</syntaxhighlight>

This table falls into place unsorted, so when your unit accepts an [[SI prefix]] you can test, say, k, m, and G, with your unit, and compare with e notations 1e3, 1e6, and 1e9 in the number.  For example, Val sorts these two as equal: <code>1e3 m</code> (standard [[scientific notation#E notation|e notation]]) and <code>1 km</code>.

;What to look for:

* The linked and non-linked markup should look exactly the same. 
* Navigate to the new link. It is safe: you can go back in your browser to here. 
* The two {{para|up}} versions should have no space in front of them.
* For SI prefixes sorting 2e3 (or 2000) should be greater than k (kilo prefix).