src/test/resources/freemarker/test/templatesuite/templates/existence-operators.ftl

<@isIRE>${v}</@>
<@isIRE>${w}</@>
<@isNonFastIRE>${v}</@> <#-- To check that it isn't an IRE.FAST_INSTANCE -->

<@assertEquals actual=v!'-' expected='-' />
<@assertEquals actual=(v)!'-' expected='-' />
<@assertEquals actual=(v!) expected='' />
<@assertEquals actual=((v)!) expected='' />
<@isNonFastIRE>${v}</@> <#-- To check that it isn't an IRE.FAST_INSTANCE -->
<@assertEquals actual=v?? expected=false />
<@assertEquals actual=(v)?? expected=false />
<@assertEquals actual=v?default('-') expected='-' />
<@assertEquals actual=(v)?default('-') expected='-' />
<@isNonFastIRE>${v}</@> <#-- To check that it isn't an IRE.FAST_INSTANCE -->
<@assertEquals actual=v?exists expected=false />
<@assertEquals actual=(v)?exists expected=false />
<@assertEquals actual=v?if_exists expected='' />
<@assertEquals actual=(v)?if_exists expected='' />
<@assertEquals actual=v?has_content expected=false />
<@assertEquals actual=(v)?has_content expected=false />

<@assertEquals actual=v?default(w, '-') expected='-' />
<@assertEquals actual=v!w!'-' expected='-' />
<#assign w = 'W'>
<@assertEquals actual=v?default(w, '-') expected='W' />
<@assertEquals actual=v!w!'-' expected='W' />

<#list ['V', 1.5] as v>
	<@assertEquals actual=v!'-' expected=v />
	<@assertEquals actual=(v)!'-' expected=v />
	<@assert test=v?? />
	<@assert test=(v)?? />
	<@assertEquals actual=v?default('-') expected=v />
	<@assertEquals actual=(v)?default('-') expected=v />
	<@assert test=v?exists />
	<@assert test=(v)?exists />
	<@assertEquals actual=v?if_exists expected=v />
	<@assertEquals actual=(v)?if_exists expected=v />
	<@assert test=v?has_content />
	<@assert test=(v)?has_content />
</#list>
<@assert test=!v?? />
<@assert test=!v?exists />
<@isNonFastIRE>${v}</@> <#-- To check that it isn't an IRE.FAST_INSTANCE -->

<@isIRE>${u.v!'-'}</@>
<@assertEquals actual=(u.v)!'-' expected='-' />
<@isIRE>${u.v??}</@>
<@assertEquals actual=(u.v)?? expected=false />
<@isIRE>${u.v?default('-')}</@>
<@assertEquals actual=(u.v)?default('-') expected='-' />
<@isIRE>${u.v?exists}</@>
<@assertEquals actual=(u.v)?exists expected=false />
<@isIRE>${u.v?if_exists}</@>
<@assertEquals actual=(u.v)?if_exists expected='' />
<@isIRE>${u.v?has_content}</@>
<@assertEquals actual=(u.v)?has_content expected=false />

<#assign u = { 'x': 'X' } >
<@assertEquals actual=u.v!'-' expected='-' />
<@assertEquals actual=(u.v)!'-' expected='-' />
<@assertEquals actual=u.v?? expected=false />
<@assertEquals actual=(u.v)?? expected=false />
<@assertEquals actual=u.v?default('-') expected='-' />
<@assertEquals actual=(u.v)?default('-') expected='-' />
<@assertEquals actual=u.v?exists expected=false />
<@assertEquals actual=(u.v)?exists expected=false />
<@assertEquals actual=u.v?if_exists expected='' />
<@assertEquals actual=(u.v)?if_exists expected='' />
<@assertEquals actual=u.v?has_content expected=false />
<@assertEquals actual=(u.v)?has_content expected=false />

<#assign u = { 'v': 'V' } >
<@assertEquals actual=u.v!'-' expected='V' />
<@assertEquals actual=(u.v)!'-' expected='V' />
<@assert test=u.v?? />
<@assert test=(u.v)?? />
<@assertEquals actual=u.v?default('-') expected='V' />
<@assertEquals actual=(u.v)?default('-') expected='V' />
<@assert test=u.v?exists />
<@assert test=(u.v)?exists />
<@assertEquals actual=u.v?if_exists expected='V' />
<@assertEquals actual=(u.v)?if_exists expected='V' />
<@assert test=u.v?has_content />
<@assert test=(u.v)?has_content />

<#list 1..4 as i>
  <#if i == 3><#assign x = 'X'></#if>
  <@assertEquals actual=((x!'-') == '-') expected=(i < 3) />
</#list>

<#macro attemptTest>
  <#attempt>
    ${fails}
  <#recover>
    <@assert test=isNonFastIREMessage(.error) />
  </#attempt>
</#macro>
<@attemptTest />
${(callMacroFromExpression(attemptTest))!}

<#macro interpretTest><@'$\{fails}'?interpret /></#macro>
<#attempt>
  <@interpretTest />
<#recover>
  <@assert test=isNonFastIREMessage(.error) />
</#attempt>
<#attempt>
  ${(callMacroFromExpression(interpretTest))!}
<#recover>
  <@assert test=isNonFastIREMessage(.error) />
</#attempt>

<@assertEquals actual='fails'?eval!'-' expected='-' />
<@assertEquals actual=('fails')?eval!'-' expected='-' />

<#macro isIRE><@assertFails exception="InvalidReferenceException"><#nested></@></#macro>
<#macro isNonFastIRE><@assertFails exception="InvalidReferenceException" message="Tip:"><#nested></@></#macro>
<#function isNonFastIREMessage msg><#return msg?contains('Tip:') && msg?contains('null or missing')></#function>
<#function callMacroFromExpression m>
  <#local captured><@m /></#local>
  <#return captured>
</#function>