Add PlayJsonEnumSpec

Author: lloydmeta

enumeratum-play-json/src/test/scala/enumeratum/Dummy.scala

@@ -4,7 +4,7 @@ package enumeratum
  * Created by Lloyd on 2/4/15.
  */
 sealed trait Dummy
-object Dummy extends Enum[Dummy] {
+object Dummy extends Enum[Dummy] with PlayJsonEnum[Dummy] {
   case object A extends Dummy
   case object B extends Dummy
   case object C extends Dummy

enumeratum-play-json/src/test/scala/enumeratum/PlayJsonEnumSpec.scala

@@ -0,0 +1,33 @@
+package enumeratum
+
+import org.scalatest.{ Matchers, FunSpec }
+import play.api.libs.json.{ JsNumber, JsString, Json => PlayJson }
+import org.scalatest.OptionValues._
+
+class PlayJsonEnumSpec extends FunSpec with Matchers {
+
+  describe("JSON serdes") {
+
+    describe("deserialisation") {
+
+      it("should work with valid values") {
+        JsString("A").asOpt[Dummy].value shouldBe Dummy.A
+      }
+
+      it("should fail with invalid values") {
+        JsString("D").asOpt[Dummy] shouldBe None
+        JsNumber(2).asOpt[Dummy] shouldBe None
+      }
+    }
+
+    describe("serialisation") {
+
+      it("should serialise values to JsString") {
+        PlayJson.toJson(Dummy.A) shouldBe (JsString("A"))
+      }
+
+    }
+
+  }
+
+}