Styjun

I'm encountering a weird issue / bug with assert j and groovy with step verifier testing mongo db. I've included some code to help you reproduce this locally and also I have made the test work by replacing the closure with just a string.

I have the following code:

 @Document
 @ToString(includePackage = false, includeFields = true)
 class Image 
 @Id private String id
 private String name

 Image() 
 

 Image(String id, String name) 
 this.id = id
 this.name = name
 

 String getId() 
 return id
 

 void setId(String id) 
 this.id = id
 

 String getName() 
 return name
 

 void setName(String name) 
 this.name = name
 
 

ImageRepository.groovy

interface ImageRepository extends ReactiveCrudRepository<Image, String>
 Mono<Image> findByName(String name)

and the following test

@RunWith(SpringRunner)
@DataMongoTest
class EmbeddedImageRepositoryTests 

 @Autowired
 ImageRepository repository

 @Autowired
 MongoOperations operations

 @Before
 void setup() 
 operations.dropCollection(Image)
 operations.insert(new Image([
 id : '1',
 name: 'learning-spring-boot-cover.jpg'
 ]))
 operations.insert(new Image([
 id : '2',
 name: 'learning-spring-boot-2nd-edition.jpg'
 ]))
 operations.insert(new Image([
 id : '3',
 name: 'bazinga.png'
 ]))
 operations.findAll(Image).each println it 
 

 @Test
 void findAllShouldWork() 
 Flux<Image> images = repository.findAll()
 StepVerifier.create(images)
 .recordWith( new ArrayList<>() )
 .expectNextCount(3)
 .consumeRecordedWith(
 
 assertThat(it).hasSize(3)
 assertThat(it)
 .extracting(it.name)
 .contains(
 'learning-spring-boot-cover.jpg',
 'learning-spring-boot-2nd-edition.jpg',
 'bazinga.png')
 )
 .expectComplete()
 .verify()
 

The test fails and the offending line is this after some

.extracting(it.name)

When it is changed to

.extracting('name')

Then the test passes. Has anybody had the same problem with using assert J and groovy and step verifier?

I haven't used AssertJ with groovy but my guess is Groovy is confused when resolving which extracting methods to use, if I had to pick the ones confusing Groovy I would pick:

• 
  https://static.javadoc.io/org.assertj/assertj-core/3.12.2/org/assertj/core/api/AbstractIterableAssert.html#extracting-java.util.function.Function-


• https://static.javadoc.io/org.assertj/assertj-core/3.12.2/org/assertj/core/api/AbstractIterableAssert.html#extracting-org.assertj.core.api.iterable.ThrowingExtractor-

but you have a few more overloaded extracting in https://static.javadoc.io/org.assertj/assertj-core/3.12.2/org/assertj/core/api/AbstractIterableAssert.html#method.summary.