[jira] [Commented] (TEXT-127) Detect when a variable is unknown in StringSubstitutor

[ASF GitHub Bot (JIRA)]

    [ 
https://issues.apache.org/jira/browse/TEXT-127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16667580#comment-16667580
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ASF GitHub Bot commented on TEXT-127:
-------------------------------------

Github user coveralls commented on the issue:

    https://github.com/apache/commons-text/pull/91
  
    
    [![Coverage 
Status](https://coveralls.io/builds/19787137/badge)](https://coveralls.io/builds/19787137)
    
    Coverage increased (+0.002%) to 97.876% when pulling 
**60bed4374a2db82bc7842d3ccd33e2158d2b80f6 on drajakumar:master** into 
**6c3cc5239c2143256976c9e8a05dd76b31c74baf on apache:master**.



> Detect when a variable is unknown in StringSubstitutor
> ------------------------------------------------------
>
>                 Key: TEXT-127
>                 URL: https://issues.apache.org/jira/browse/TEXT-127
>             Project: Commons Text
>          Issue Type: Improvement
>            Reporter: Jean-Baptiste REICH
>            Priority: Minor
>
> Currently, StringSubstitutor is not replacing a variable that is unknown. It 
> would be nice to define the behavior in this case and to allow raising an 
> exception.
> A workaround is to define a custom StringLookup that raises an exception when 
> the variable is unknown but this prevent from using the default value feature 
> from StringSubstitutor



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