add test

Author: pjfanning

src/test/scala/com/fasterxml/jackson/module/scala/deser/CaseClassDeserializerTest.scala

@@ -5,7 +5,7 @@ package deser
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import com.fasterxml.jackson.databind.{JsonMappingException, ObjectMapper, ObjectReader, PropertyNamingStrategy}
-import com.fasterxml.jackson.module.scala.ser.ClassWithUnitField
+import com.fasterxml.jackson.module.scala.ser.{ClassWithOnlyUnitField, ClassWithUnitField}
 
 import java.time.LocalDateTime
 
@@ -168,4 +168,11 @@ class CaseClassDeserializerTest extends DeserializerTest {
     val result = deserialize(input, classOf[ClassWithUnitField])
     result shouldEqual ClassWithUnitField((), 2)
   }
+
+  //this does not currently work
+  it should "support ClassWithOnlyUnitField" ignore {
+    val input = """{}"""
+    val result = deserialize(input, classOf[ClassWithOnlyUnitField])
+    result shouldEqual ClassWithOnlyUnitField(())
+  }
 }

src/test/scala/com/fasterxml/jackson/module/scala/ser/CaseClassSerializerTest.scala

@@ -60,6 +60,7 @@ case class PrivateDefaultFields(
 )
 
 case class ClassWithUnitField(field: Unit, intField: Int)
+case class ClassWithOnlyUnitField(field: Unit)
 
 class CaseClassSerializerTest extends SerializerTest {
 
@@ -193,4 +194,8 @@ class CaseClassSerializerTest extends SerializerTest {
   it should "serialize ClassWithUnitField" in {
     serialize(ClassWithUnitField((), 2)) shouldEqual """{"intField":2}"""
   }
+
+  it should "serialize ClassWithOnlyUnitField" in {
+    serialize(ClassWithOnlyUnitField(())) shouldEqual """{}"""
+  }
 }