Test RestfulController with Grails - json

Question

I'm trying to write some integration tests for a RestfulController in Grails 2.4.0 responding in JSON format. The index()-Method is implemented like this:
class PersonController extends RestfulController<Person> {
...
def index(final Integer max) {
params.max = Math.min(max ?: 10, 100)
respond listAllResources(params), [includes: includeFields]
}
...
}
The integration test looks like this:
void testListAllPersons() {
def controller = new PersonController()
new Person(name: "Person", age: 22).save(flush:true)
new Person(name: "AnotherPerson", age: 31).save(flush:true)
controller.response.format = 'json'
controller.request.method = 'GET'
controller.index()
assertEquals '{{"name":"Person", "age": "22"},{"name":"AnotherPerson", "age": "31"}}', controller.response.json
}
What i don't understand is controller.response.json only contains the "AnotherPerson" instead of both entries.
When i start the server with run-app und test it with a Rest-Client i get both entries.
Any Ideas?

Answer 1

You haven't included enough information to say for sure what the problem is but the following test passes with 2.4.0.
The domain class:
// grails-app/domain/com/demo/Person.groovy
package com.demo
class Person {
String name
Integer age
}
The controller:
// grails-app/controllers/com/demo/PersonController.groovy
package com.demo
class PersonController extends grails.rest.RestfulController<Person> {
PersonController() {
super(Person)
}
def index(final Integer max) {
params.max = Math.min(max ?: 10, 100)
respond listAllResources(params)
}
}
The test:
// test/unit/com/demo/PersonControllerSpec.groovy
package com.demo
import grails.test.mixin.TestFor
import spock.lang.Specification
#TestFor(PersonController)
#Mock(Person)
class PersonControllerSpec extends Specification {
void "test index includes all people"() {
given:
new Person(name: "Person", age: 22).save(flush:true)
new Person(name: "AnotherPerson", age: 31).save(flush:true)
when:
request.method = 'GET'
response.format = 'json'
controller.index()
then:
response.status == 200
response.contentAsString == '[{"class":"com.demo.Person","id":1,"age":22,"name":"Person"},{"class":"com.demo.Person","id":2,"age":31,"name":"AnotherPerson"}]'
}
}

Answer 2

I simplified the example a little too much. I used a named object marshaller which i created (incorrect) in bootstrap.groovy like this:
JSON.createNamedConfig('simplePerson') { converterConfig ->
converterConfig.registerObjectMarshaller(Person) {
JSON.registerObjectMarshaller(Person) {
def map = [:]
map['name'] = it.name
map['age'] = it.age
return map
}
}
}
And used it in the controller:
...
JSON.use("simplePerson")
...
The problem is solved by creating the object marshaller like this:
JSON.createNamedConfig('simplePerson') { converterConfig ->
converterConfig.registerObjectMarshaller(Person) {
def map = [:]
map['name'] = it.name
map['age'] = it.age
return map
}
}