test(model-datastructure): add more detail to errors in FailingVisitor

Author: mhuster23

model-datastructure/src/commonTest/kotlin/FailingVisitor.kt

@@ -17,30 +17,30 @@ import kotlin.test.fail
 
 class FailingVisitor : ITreeChangeVisitorEx {
     override fun containmentChanged(nodeId: Long) {
-        fail("Tree expected to be the same")
+        fail("Tree expected to be the same. Changed containment in node $nodeId")
     }
 
     override fun conceptChanged(nodeId: Long) {
-        fail("Tree expected to be the same")
+        fail("Tree expected to be the same. Changed concept in node $nodeId")
     }
 
     override fun childrenChanged(nodeId: Long, role: String?) {
-        fail("Tree expected to be the same")
+        fail("Tree expected to be the same. Changed children in node $nodeId in role $role")
     }
 
     override fun referenceChanged(nodeId: Long, role: String) {
-        fail("Tree expected to be the same")
+        fail("Tree expected to be the same. Changed reference in node $nodeId in role $role")
     }
 
     override fun propertyChanged(nodeId: Long, role: String) {
-        fail("Tree expected to be the same")
+        fail("Tree expected to be the same. Changed property in node $nodeId in role $role")
     }
 
     override fun nodeRemoved(nodeId: Long) {
-        fail("Tree expected to be the same")
+        fail("Tree expected to be the same. Node $nodeId was removed.")
     }
 
     override fun nodeAdded(nodeId: Long) {
-        fail("Tree expected to be the same")
+        fail("Tree expected to be the same. Node $nodeId was added.")
     }
 }