Add predefined JsonFormat for Either type

1 files changed, 19 insertions, 0 deletions

diff --git a/src/test/scala/cc/spray/json/StandardFormatsSpec.scala b/src/test/scala/cc/spray/json/StandardFormatsSpec.scala
index 00561e0..7c454ac 100644
--- a/src/test/scala/cc/spray/json/StandardFormatsSpec.scala
+++ b/src/test/scala/cc/spray/json/StandardFormatsSpec.scala
@@ -1,6 +1,7 @@
 package cc.spray.json
 
 import org.specs.Specification
+import scala.Right
 
 class StandardFormatsSpec extends Specification with StandardFormats with BasicFormats {
 
@@ -18,6 +19,24 @@ class StandardFormatsSpec extends Specification with StandardFormats with BasicF
       JsString("Hello").fromJson[Option[String]] mustEqual Some("Hello")
     } 
   }
+
+  "The eitherFormat" should {
+    val a: Either[Int, String] = Left(42)
+    val b: Either[Int, String] = Right("Hello")
+
+    "convert the left side of an Either value to Json" in {
+      a.toJson mustEqual JsNumber(42)
+    }
+    "convert the right side of an Either value to Json" in {
+      b.toJson mustEqual JsString("Hello")
+    }
+    "convert the left side of an Either value from Json" in {
+      JsNumber(42).fromJson[Either[Int, String]] mustEqual Left(42)
+    }
+    "convert the right side of an Either value from Json" in {
+      JsString("Hello").fromJson[Either[Int, String]] mustEqual Right("Hello")
+    }
+  }
   
   "The tuple1Format" should {
     "convert (42) to a JsNumber" in {