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https://issues.apache.org/jira/browse/GROOVY-7500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15137807#comment-15137807
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Jeff Scott Brown commented on GROOVY-7500:
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Is it agreed that this behavior is a bug?
> Problem With Runtime Metaprogramming Over A Trait Method
> --------------------------------------------------------
>
> Key: GROOVY-7500
> URL: https://issues.apache.org/jira/browse/GROOVY-7500
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 2.4.3
> Reporter: Jeff Scott Brown
> Attachments: metaprogramovertrait.zip
>
>
> It looks like I cannot runtime metaprogram over a trait method.
> The attached metaprogramovertrait.zip file contains the following:
> {code:title=src/main/groovy/demo/SomeClass.groovy}
> package demo
> class SomeClass implements SomeTrait {}
> {code}
> {code:title=src/main/groovy/demo/SomeTrait.groovy}
> package demo
> trait SomeTrait {
> void someMethod() {
> }
> }
> {code}
> {code:title=src/test/groovy/demo/SomeClassSpec.groovy}
> package demo
> import spock.lang.Specification
> class SomeClassSpec extends Specification {
> void 'test something'() {
> given:
> SomeClass.metaClass.someMethod = { ->
> throw new UnsupportedOperationException()
> }
> when:
> new SomeClass().someMethod()
> then:
> UnsupportedOperationException ex = thrown()
> }
> }
> {code}
> If I remove the method from the trait, the test passes.
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