Update CaseClassDeserializerTest.scala

Author: pjfanning

src/test/scala/tools/jackson/module/scala/deser/CaseClassDeserializerTest.scala

@@ -72,6 +72,7 @@ object CaseClassDeserializerTest {
 
   case class ListHolder[T](list: List[T])
   case class AnnotatedListHolder[T](@JsonSetter(nulls = Nulls.AS_EMPTY)list: List[T])
+  case class OptionListHolder[T](list: Option[List[T]])
 
   case class MapHolder[K, V](map: Map[K, V])
   case class AnnotatedMapHolder[K, V](@JsonSetter(nulls = Nulls.AS_EMPTY)map: Map[K, V])
@@ -215,6 +216,12 @@ class CaseClassDeserializerTest extends DeserializerTest {
     result.list shouldBe List.empty
   }
 
+  it should "support deserializing null input for Option[List] as None" in {
+    val input = """{}"""
+    val result = deserialize(input, classOf[OptionListHolder[String]])
+    result.list shouldBe None
+  }
+
   it should "support deserializing null input for map as empty map" in {
     val input = """{}"""
     val result = deserialize(input, classOf[MapHolder[Int, String]])