I have a problem with a test (mock) of type POST in kotlin, when i use a data class with a date field (LocalDate).
This is the Stack im using:
springBoot : v2.1.7.RELEASE
Java : jdk-11.0.4
kotlinVersion : '1.3.70'
junitVersion : '5.6.0'
junit4Version : '4.13'
mockitoVersion : '3.2.4'
springmockk : '1.1.3'
When i execute the POST method in the app, all is ok, i have the response and the data is saved correctly in the db:
curl -X POST "http://127.0.1.1:8080/v1/person/create" -H "accept: */*" -H "Content-Type: application/json" -d "[ { \"available\": true, \"endDate\": \"2090-01-02\", \"hireDate\": \"2020-01-01\", \"id\": 0, \"lastName\": \"stringTest\", \"name\": \"stringTest\", \"nickName\": \"stringTest\" }]"
But when i try to make the test of the POST Method, i cant (only with POST method, with GET is ok)
This are the classes that i use:
File Person.kt
@Entity
data class Person(
@Id @Column(name = "id") @GeneratedValue(strategy = GenerationType.AUTO)
var id: Long,
var name: String,
var lastName: String,
var nickName: String,
@JsonFormat(pattern = "yyyy-MM-dd")
var hireDate: LocalDate,
@JsonFormat(pattern = "yyyy-MM-dd")
var endDate: LocalDate,
var available: Boolean
) {
constructor() : this(0L, "Name example",
"LastName example",
"Nick example",
LocalDate.of(2020,1,1),
LocalDate.of(2090,1,1),
true)
File PersonService.kt
@Service
class PersonService(private val personRepository: PersonRepository) {
fun findAll(): List<Person> {
return personRepository.findAll()
}
fun saveAll(personList: List<Person>): MutableList<person>? {
return personRepository.saveAll(personList)
}
}
File PersonApi.kt
@RestController
@RequestMapping("/v1/person/")
class PersonApi(private val personRepository: PersonRepository) {
@Autowired
private var personService = PersonService(personRepository)
@PostMapping("create")
fun createPerson(@Valid
@RequestBody person: List<Person>): ResponseEntity<MutableList<Person>?> {
print("person: $person") //this is only for debug purpose only
return ResponseEntity(personService.saveAll(person), HttpStatus.CREATED)
}
}
And finally
PersonApiShould.kt (This class is the problem)
@EnableAutoConfiguration
@AutoConfigureMockMvc
@ExtendWith(MockKExtension::class)
internal class PersonApiShould {
private lateinit var gsonBuilder: GsonBuilder
private lateinit var gson: Gson
lateinit var mockMvc: MockMvc
@MockkBean
lateinit var personService: PersonService
@BeforeEach
fun setUp() {
val repository = mockk<PersonRepository>()
personService = PersonService(repository)
mockMvc = standaloneSetup(PersonApi(repository)).build()
gson = GsonBuilder()
.registerTypeAdapter(Person::class.java, PersonDeserializer())
.create()
gsonBuilder = GsonBuilder()
}
@AfterEach
fun clear() {
clearAllMocks()}
@Test
fun `create person`() {
val newPerson = Person(1L,
"string", //name
"string", //lastName
"string", //nickname
LocalDate.of(2020, 1, 1), //hireDate
LocalDate.of(2090, 1, 2), //endDate
true) //available
val contentList = mutableListOf<Person>()
contentList.add(newPerson)
// also tried with
// every { personService.findAll() }.returns(listOf<Person>())
// every { personService.saveAll(mutableListOf<Person>())}.returns(Person())
every { personService.findAll() }.returns(contentList)
every { personService.saveAll(any()) }.returns(contentList)
/* didn't work either
val personJson = gsonBuilder.registerTypeAdapter(Date::class.java, DateDeserializer())
.create().toJson(newPerson)
*/
val content = "[\n" +
" {\n" +
" \"available\": true,\n" +
" \"endDate\": \"2090-01-02\",\n" +
" \"hireDate\": \"2020-01-01\",\n" +
" \"id\": 0,\n" +
" \"lastName\": \"string\",\n" +
" \"name\": \"string\",\n" +
" \"nickName\": \"string\"\n" +
" }\n" +
"]"
val httpResponse = mockMvc.perform(post("/v1/resto/person/create")
.content(content) //also tried with .content(contentList)
.contentType(MediaType.APPLICATION_JSON))
.andReturn()
// error, because, httpResponse is always empty
val personCreated: List<Person> = gson.fromJson(httpResponse.response.contentAsString,
object : TypeToken<List<Person>>() {}.type)
assertEquals(newPerson.name, personCreated.get(0).name)
}
Gson have some issues when deserialize dates, this is a parser (hack), it works for my GET method
File PersonDeserializer.kt
class PersonDeserializer : JsonDeserializer<Person> {
override fun deserialize(json: JsonElement, typeOfT: Type, context: JsonDeserializationContext): Person {
json as JsonObject
val name = json.get("name").asString
val lastName = json.get("lastName").asString
val nickName = json.get("nickName").asString
val available = json.get("available").asBoolean
val hireDate = LocalDate.of((json.get("hireDate") as JsonArray).get(0).asInt,
(json.get("hireDate") as JsonArray).get(1).asInt,
(json.get("hireDate") as JsonArray).get(2).asInt)
val endDate = LocalDate.of((json.get("endDate") as JsonArray).get(0).asInt,
(json.get("endDate") as JsonArray).get(1).asInt,
(json.get("endDate") as JsonArray).get(2).asInt)
return Person(1L, name, lastName, nickName, hireDate, endDate, available)
}
}
I see that the error is in the MOCKK Library, because from test i can reach the endpoint and print correctly the value
print from endpoint: print("person: $person") //this line is in the endpoint
Person: [Person(id=0, name=string, lastName=string, nickName=string, hireDate=2020-01-01, endDate=2090-01-02, available=true)]
Error test log
19:27:24.840 [main] DEBUG io.mockk.impl.recording.states.AnsweringState - Throwing io.mockk.MockKException: no answer found for: PersonRepository(#1).saveAll([Person(id=0, name=string, lastName=string, nickName=string, hireDate=2020-01-01, endDate=2090-01-02, available=true)]) on PersonRepository(#1).saveAll([Person(id=0, name=string, lastName=string, nickName=string, hireDate=2020-01-01, endDate=2090-01-02, available=true)])
19:27:24.844 [main] DEBUG org.springframework.test.web.servlet.TestDispatcherServlet - Failed to complete request: io.mockk.MockKException: no answer found for: PersonRepository(#1).saveAll([Person(id=0, name=string, lastName=string, nickName=string, hireDate=2020-01-01, endDate=2090-01-02, available=true)])
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is io.mockk.MockKException: no answer found for: PersonRepository(#1).saveAll([Person(id=0, name=string, lastName=string, nickName=string, hireDate=2020-01-01, endDate=2090-01-02, available=true)])
Errors varies, depending the fix, also i got
JSON parse error: Cannot deserialize value of type
java.time.LocalDatefrom ... ... 48 more
But always is the same problem with serialization of LocalDate in Spring with Kotlin
Any assistance you can provide would be greatly appreciated.
