Add test for lazyFormat wrapper (recursive JsonFormats)

1 files changed, 14 insertions, 0 deletions

diff --git a/src/test/scala/cc/spray/json/AdditionalFormatsSpec.scala b/src/test/scala/cc/spray/json/AdditionalFormatsSpec.scala
index 0db3d5a..1f5362a 100644
--- a/src/test/scala/cc/spray/json/AdditionalFormatsSpec.scala
+++ b/src/test/scala/cc/spray/json/AdditionalFormatsSpec.scala
@@ -38,4 +38,18 @@ class AdditionalFormatsSpec extends Specification {
       JsonParser("""{"content":{"content":[1,2,3]}}""").convertTo[Container[Container[List[Int]]]] mustEqual obj
     }
   }
+
+  case class Foo(id: Long, name: String, foos: Option[List[Foo]] = None)
+
+  object FooProtocol extends DefaultJsonProtocol {
+    implicit val FooProtocol: JsonFormat[Foo] = lazyFormat(jsonFormat(Foo, "id", "name", "foos"))
+  }
+
+  "The lazyFormat wrapper" should {
+    "enable recursive format definitions" in {
+      import FooProtocol._
+      Foo(1, "a", Some(Foo(2, "b", Some(Foo(3, "c") :: Nil)) :: Foo(4, "d") :: Nil)).toJson.toString mustEqual
+        """{"id":1,"name":"a","foos":[{"id":2,"name":"b","foos":[{"id":3,"name":"c"}]},{"id":4,"name":"d"}]}"""
+    }
+  }
 }
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