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https://issues.apache.org/jira/browse/NIFI-4590?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matt Burgess resolved NIFI-4590.
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Resolution: Implemented
This error was fixed in NIFI-4717 and further improved in NIFI-6318, closing.
> customValidate() fails during unit tests when isExpressionLanguagePresent()
> is called
> --------------------------------------------------------------------------------------
>
> Key: NIFI-4590
> URL: https://issues.apache.org/jira/browse/NIFI-4590
> Project: Apache NiFi
> Issue Type: Test
> Components: Core Framework
> Reporter: Matt Burgess
> Priority: Major
>
> When isExpressionLanguagePresent() is called from a customValidate() method
> in a processor during a unit test, a NullPointerException is thrown.
> Inside that method in MockPropertyValue, a Boolean (not boolean) reference
> "expectExpressions" appears that expectExpressions has not yet been populated
> by the time isExpressionLanguagePresent() is called, and the
> if(!expectExpressions) clause results in an NPE.
> Not sure if the fix is to change expectExpressions to be a boolean, or to
> allow for expectExpressions == null in isExpressionLanguagePresent(), or some
> third option to achieve the desired behavior while maintaining an accurate
> mock of true behavior.
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