# @todo expand
!! functionhooks
var
!! endfunctionhooks

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

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

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

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

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

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

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

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

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

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

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

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

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

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