jdaugherty commented on code in PR #15692:
URL: https://github.com/apache/grails-core/pull/15692#discussion_r3341425046


##########
grails-data-graphql/core/src/test/groovy/org/grails/gorm/graphql/fetcher/impl/DeleteEntityDataFetcherSpec.groovy:
##########
@@ -76,6 +77,19 @@ class DeleteEntityDataFetcherSpec extends HibernateSpec {
         1 * responseHandler.createResponse(env, false, _ as 
NullPointerException)
     }
 
+    void "test deleteInstance flushes the delete and does not pass the ignored 
failOnError argument"() {
+        given:
+        DeleteEntityDataFetcher fetcher = new 
DeleteEntityDataFetcher<>(mappingContext.getPersistentEntity(One.name))
+        GormEntity instance = Mock(GormEntity)
+
+        when:
+        fetcher.deleteInstance(instance)
+
+        then: 'the delete is flushed so database failures surface, and 
failOnError (ignored by delete) is not used'
+        1 * instance.delete([flush: true])
+        0 * instance.delete([failOnError: true])

Review Comment:
   Mock tests generally are fragile since we're not actually testing the 
result.  Shouldn't we instead check the persisted state? 



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