!! Version 2

# @todo expand
!! functionhooks
var
!! endfunctionhooks

!! test
#vardefine, #vardefineecho and #var
!! wikitext
{{#vardefine: a | Test }}
"{{#var: a }}"
"{{#vardefineecho: a | Test 2 }}, {{#var: a }}"
!! html
<p>"Test"
"Test 2, Test 2"
</p>
!! end

!! test
#varexists
!! wikitext
{{#varexists: a }}{{#vardefine: a }}
"{{#varexists: a }}"
!! html
<p>"1"
</p>
!! end

!! test
#var_final
!! wikitext
"{{#var_final: a }}"
{{#vardefine: a | something }}"{{#var: a }}"
{{#vardefine: a | final }}"{{#var_final: a }}"
!! html
<p>"final"
"something"
"final"
</p>
!! end

!! test
#varexists incorporating #if functionality
!! wikitext
{{#vardefine: a }}"{{#varexists: a | yes | no }}"
"{{#varexists: b | yes | no }}"
!! html
<p>"yes"
"no"
</p>
!! end

!! test
Variables should not be reset on special page inclusion (old bug, solved in Variables 2.0)
!! wikitext
{{#vardefine: a | 1 }}{{#vardefine: | {{Special:AllPages}} }}
"{{#var: a }}"
!! html
<p>"1"
</p>
!! end

!! test
Default values for #var
!! wikitext
"{{#var: a | 1 }}"
{{#vardefine: a | 0 }}"{{#var: a | 1 }}"
!! html
<p>"1"
"0"
</p>
!! end

!! test
The default value of #var should not be expanded if it does not apply.
!! wikitext
{{#vardefine: a | 1 }}"{{#var: a | {{#vardefineecho: b | 2 }} }}"
"{{#var: b | 3 }}"
!! html
<p>"1"
"3"
</p>
!! end

!! test
The else value of #varexists should not be expanded if the if value applies.
!! wikitext
{{#vardefine: a | w }}"{{#varexists: a | x | {{#vardefineecho: b | y }} }}"
"{{#var: b | z }}"
!! html
<p>"x"
"z"
</p>
!! end

!! test
The if value of #varexists should not be expanded if the else value applies.
!! wikitext
"{{#varexists: a | {{#vardefineecho: b | x }} | y }}"
"{{#var: b | z }}"
!! html
<p>"y"
"z"
</p>
!! end

!! test
Empty string is a valid variable name as well.
!! wikitext
"{{#var_final: }}"
{{#vardefine: | 1 }}"{{#var: }}"
!! html
<p>"1"
"1"
</p>
!! end

!! test
Integers are valid variable names, but even though their actually strings,
they are cast to int when used as array keys.
!! wikitext
"{{#var_final: 1 }}"
{{#vardefine: 1 | x }}"{{#var: 1 }}"
!! html
<p>"x"
"x"
</p>
!! end

!! article
Template:EchoVarA
!! text
{{#var: a }}
!! endarticle

!! article
Template:IssetA
!! text
{{#varexists: a }}
!! endarticle

!! article
Template:DefineA
!! text
{{#vardefine: a | w }}
!! endarticle

!! article
Template:DefineEchoA
!! text
{{#vardefineecho: a | z }}
!! endarticle

!! test
By default, there shouldn't be any template caching if Variables are used.
!! config
egVariablesAreVolatile=true
!! wikitext
"{{IssetA}}"
{{#vardefine: a | x }}"{{EchoVarA}}"
"{{IssetA}}"
{{#vardefine: a | y }}"{{EchoVarA}}"
!! html
<p>""
"x"
"1"
"y"
</p>
!! end

!! test
This is also true for vardefine(echo).
!! config
egVariablesAreVolatile=true
!! wikitext
{{DefineA}}"{{#var: a }}"
{{#vardefine: a | x }}"{{#var: a }}"
{{DefineA}}"{{#var: a }}"
"{{DefineEchoA}}"
"{{#vardefineecho: a | y }}"
"{{DefineEchoA}}"
"{{#var: a }}"
!! html
<p>"w"
"x"
"w"
"z"
"y"
"z"
"z"
</p>
!! end

!! test
However, it's possible to activate the legacy behavior to activate template caching.
!! config
egVariablesAreVolatile=false
!! wikitext
"{{IssetA}}"
{{#vardefine: a | x }}"{{EchoVarA}}"
"{{IssetA}}"
{{#vardefine: a | y }}"{{EchoVarA}}"
!! html
<p>""
"x"
""
"x"
</p>
!! end

!! test
This also deativates it for vardefine(echo).
!! config
egVariablesAreVolatile=false
!! wikitext
{{DefineA}}"{{#var: a }}"
{{#vardefine: a | x }}"{{#var: a }}"
{{DefineA}}"{{#var: a }}"
"{{DefineEchoA}}"
"{{#vardefineecho: a | y }}"
"{{DefineEchoA}}"
"{{#var: a }}"
!! html
<p>"w"
"x"
"x"
"z"
"y"
"z"
"y"
</p>
!! end

!! test
Variables can be substituted.
!! options
pst
!! wikitext
"{{subst:#vardefineecho: d | 1 }}"
"{{subst:#var: d }}"
!! html
"1"
"1"
!! end

!! test
Substitutions are parsed in a different parser run than other Variables.
!! options
pst
!! wikitext
"{{subst:#vardefine: d | 1 }}"
"{{#vardefine: d | 2 }}"
"{{subst:#var: d }}"
"{{subst:#vardefine: d | 3 }}"
"{{#var: d }}"
!! html
""
"{{#vardefine: d | 2 }}"
"1"
""
"{{#var: d }}"
!! end

!! test
#var_final can be substituted as well.
!! options
pst
!! wikitext
"{{subst:#vardefineecho: a | x }}"
"{{subst:#var_final: a }}"
"{{subst:#vardefine: a | y }}"
!! html
"x"
"y"
""
!! end

!! test
(Simple) Wikitext in #var_final is parsed
!! wikitext
{{#vardefine:a| [[Lunar Prospector]] }}
obtained by {{#var_final:a}}
!! html
<p>obtained by <a href="/index.php?title=Lunar_Prospector&amp;action=edit&amp;redlink=1" class="new" title="Lunar Prospector (page does not exist)">Lunar Prospector</a>
</p>
!! end

!! test
Even when #var_final is substituted
!! options
pst
!! wikitext
"{{subst:#vardefine:a| [[Lunar Prospector]] }}"
obtained by {{subst:#var_final:a}}
!! html
""
obtained by [[Lunar Prospector]]
!! end

!! test
Even when it is a category link
!! options
cat
!! wikitext
{{#vardefine: a | x }}{{#var_final: a }}{{#vardefine: a | [[Category:MediaWiki User's Guide]] }}
!! html
cat=MediaWiki_User's_Guide sort=
!! end

!! test
And substituted
!! options
pst
!! wikitext
{{subst:#vardefine: a | x }}{{subst:#var_final: a }}{{subst:#vardefine: a | [[Category:MediaWiki User's Guide]] }}
!! html
[[Category:MediaWiki User's Guide]]
!! end

!! test
#var_final with nowiki tags
!! wikitext
{{#vardefine:test|1 '''<i>Test</i>''' <nowiki>'''<i>nowiki</i>'''</nowiki>}}{{#var_final:test}}{{#vardefine:test|2 '''<i>Test</i>''' <nowiki>'''<i>nowiki</i>'''</nowiki>}}
!! html
<p>2 <b><i>Test</i></b> '''&lt;i&gt;nowiki&lt;/i&gt;'''
</p>
!! end

!! test
#var_final substituted, with nowiki tags
!! options
pst
!! wikitext
{{subst:#vardefine:test|1 '''<i>Test</i>''' <nowiki>'''<i>nowiki</i>'''</nowiki>}}{{subst:#var_final:test}}{{subst:#vardefine:test|2 '''<i>Test</i>''' <nowiki>'''<i>nowiki</i>'''</nowiki>}}
!! html
2 '''<i>Test</i>''' <nowiki>'''<i>nowiki</i>'''</nowiki>
!! end