Compare all Fields of an Object - groovy

Question

In our Integration Tests we wan't to compare every field of an Object returned by an Rest Controller with an object constructed in the test.
This example illustrates the problem:
class RestIntegrationTest extends Specification {
def "Should return contracts"() {
when:
def actual = callRestController()
then:
// compare all fields of actual with "contract"
actual == new Contract(
number: "123",
signDate: "2017-04-01",
address: new Address(
name: "Foobar",
street: "Foostreet",
city: "Frankfurt",
zip: "60486"
),
persons: [new Person(name: "Christian")]
)
}
def callRestController() {
return new Contract(
number: "123",
signDate: "2017-04-01",
address: new Address(
name: "Foobar",
street: "Wrong Street",
city: "Frankfurt",
zip: "60486"
),
persons: [new Person(name: "Frank")]
)
}
static class Contract {
String number
String signDate
Address address
Person[] persons
}
static class Address {
String name
String street
String city
String zip
}
static class Person {
String name
}
}
As output we like expect something like this:
address.street "Wrong Street" != "Foostreet"
persons[0].name "Christian" != "Frank"
Breaking the assert into multiple "==" lines would lead into the correct output, but that will be not handy since some objects are quite huge.

Answer 1

You can try the groovy's #EqualsAndHashCode:
import groovy.transform.EqualsAndHashCode
#EqualsAndHashCode
static class Address {
String name
String street
String city
String zip
}

Answer 2

You can use unitils assertReflectionEquals
http://unitils.sourceforge.net/tutorial-reflectionassert.html

Answer 3

It's not comprehensive but may be sufficient for your needs:
def compareFields( obj1, obj2, propName = null ) {
obj1.properties.each {
if ( it.value instanceof Object[] ) {
def obj2Len = obj2."${it.key}".length
it.value.eachWithIndex { collObj, idx ->
if ( idx + 1 <= obj2Len )
compareFields( collObj, obj2."${it.key}"[idx], "${it.key}[${idx}]" )
}
}
if ( !it.value.class.getCanonicalName().contains( 'java' ) ) {
compareFields( it.value, obj2."${it.key}", it.key )
}
if ( it.value.class.getCanonicalName().contains( 'java' ) &&
it.key != 'class' &&
it.value <=> obj2."${it.key}") {
println "${propName ? "$propName." : ''}${it.key}: '${it.value}' != '" + obj2."${it.key}" + "'"
}
}
}