1 files changed, 53 insertions, 0 deletions
diff --git a/shared/src/test/scala/OptionFieldTests.scala b/shared/src/test/scala/OptionFieldTests.scala
new file mode 100644
index 0000000..8cabf25
--- /dev/null
+++ b/shared/src/test/scala/OptionFieldTests.scala
@@ -0,0 +1,53 @@
+package spray.json
+
+import org.scalatest._
+
+class OptionFieldTests
+    extends FlatSpec
+    with FormatTests {
+
+  case class Opt(x: Option[Int])
+
+  object HideNull extends DerivedJsonProtocol {
+    override def printNull = false
+    implicit val optFmt = jsonFormat[Opt]
+  }
+
+  object ShowNull extends DerivedJsonProtocol {
+    override def printNull = true
+    implicit val optFmt = jsonFormat[Opt]
+  }
+
+
+  "Option fields with some value" should behave like checkRoundtrip(
+    Opt(Some(2)),
+    """{"x":2}"""
+  )(HideNull.optFmt)
+
+  "Option fields with some value (show null)" should behave like checkRoundtrip(
+    Opt(Some(2)),
+    """{"x":2}"""
+  )(ShowNull.optFmt)
+
+  "Option fields with null value" should behave like checkRoundtrip(
+    Opt(None),
+    """{}"""
+  )(HideNull.optFmt)
+
+  "Option fields with null value (show null)" should behave like checkRoundtrip(
+    Opt(None),
+    """{"x":null}"""
+  )(ShowNull.optFmt)
+
+  "Option fields with undefined value" should "deserialize" in {
+    import HideNull._
+    assert("{}".parseJson.convertTo[Opt] == Opt(None))
+  }
+
+  "Option fields with undefined value (show null)" should "deserialize" in {
+    import ShowNull._
+    assert("{}".parseJson.convertTo[Opt] == Opt(None))
+  }
+
+}
+