gistfile1.groovy

package unittestfailwithobjectid

import grails.test.*
import grails.datastore.test.DatastoreUnitTestMixin
import org.bson.types.ObjectId
import org.springframework.core.convert.converter.Converter

@Mixin(DatastoreUnitTestMixin)
class SampleTests extends GrailsUnitTestCase {
    protected void setUp() {
        super.setUp()

        connect()
    }

    protected void tearDown() {
        disconnect()

        super.tearDown()
    }

    void testSomething() {
        mockDomain(Sample)

        Sample.withSession { session ->
            session.datastore.mappingContext.converterRegistry.addConverter(new
                Converter<ObjectId, Long>() {
                    Long convert(ObjectId id) {
                        return 1.toLong()
                    }
                }
            )
            session.datastore.mappingContext.converterRegistry.addConverter(new
                Converter<Long, ObjectId>() {
                    ObjectId convert(Long id) {
                        return new ObjectId(id.toString())
                    }
                }
            )
        }

        def s = new Sample(name: 'Sample1')
        s.save()
        assert s.id != null

        s = Sample.get(s.id)
        assert s != null
    }
}