classcast exception with grails 2.2.3 and spock 0.7 - grails

Question

The following is what we are doing and it worked in grails 2.0.0 and spock 0.6
A Simple Domain:
package com.grails
class User {
String name, password
def methodWithNoArguments(){
return "Object: methodWithNoArguments"
}
static constraints = {
}
}
Unit spec:
package com.grails
import spock.lang.*
import grails.test.mixin.TestFor
import grails.test.mixin.Mock
import grails.test.GrailsMock
#TestFor(UserController) // testing for
#Mock([User]) // collaborators class
UserControllerSpec extends Specification {
// DOES NOT work in 2.2.3 spock 0.7,
// WORKS in grails-2.0.0 spock 0.6
def 'create a Domain collaborator using Mock'() {
given: 'user'
// can't mock this anymore, causes classcast exception.
User user = Mock(User)
user.methodWithNoArguments() >> { "Mock: (3) methodWithNoArguments" }
when: 'we call the method'
def val1 = user.methodWithNoArguments()
then: 'value should be from the mocked method'
val1 == "Mock: (3) methodWithNoArguments"
} }
the above causes the following exception in grails 2.2.3 and spock 0.7. NOTE ( it works in grails-2.0.0 and spock 0.6 )
| java.lang.ClassCastException: com.grails.User cannot be cast to net.sf.cglib.proxy.Factory
at org.spockframework.mock.runtime.ProxyBasedMockFactory$CglibMockFactory.createMock(ProxyBasedMockFactory.java:93)
at org.spockframework.mock.runtime.ProxyBasedMockFactory.create(ProxyBasedMockFactory.java:49)
at org.spockframework.mock.runtime.JavaMockFactory.create(JavaMockFactory.java:51)
at org.spockframework.mock.runtime.CompositeMockFactory.create(CompositeMockFactory.java:44)
at org.spockframework.lang.SpecInternals.createMock(SpecInternals.java:47)
at org.spockframework.lang.SpecInternals.createMockImpl(SpecInternals.java:282)
at org.spockframework.lang.SpecInternals.MockImpl(SpecInternals.java:99)
at com.grails.UserControllerSpec.create a Domain collaborator using Mock(UserControllerSpec.groovy:94)
wondering if there could be some incompatible libraries, here is the BuildConfig.groovy
dependencies {
test "org.spockframework:spock-grails-support:0.7-groovy-2.0"
}
plugins {
runtime ":hibernate:$grailsVersion"
runtime ":jquery:1.8.3"
runtime ":resources:1.2"
build ":tomcat:$grailsVersion"
runtime ":database-migration:1.3.2"
compile ':cache:1.0.1'
test(":spock:0.7") {
exclude "spock-grails-support"
}
}
sample test app is located at git#github.com:nbostech/grails-spock-2.2.3.git
git checkout grails-2.0.0; <2.0.0>/bin/grails test-app --unit UserControllerSpec; // all the tests pass
git checkout master; <2.2.3>/bin/grails test-app --unit UserControllerSpec; // one of the test fails..

Answer 1

Grails and Spock mocks aren't intended to be mixed in this way. Either make it a Grails #Mock, or a Spock Mock().