Added unit tests

Author: lansaloltd

build.sbt

@@ -6,16 +6,6 @@ version := "0.1.0-SNAPSHOT"
 
 scalaVersion := "2.12.3"
 
-/*crossScalaVersions := Seq("2.10.4", "2.11.2")
-
-libraryDependencies ++= Seq(
-
-  "org.json4s" %% "json4s-native" % "3.5.3",
-  "org.scalatest" %% "scalatest" % "3.0.1" % "test",
-  "org.scalacheck" %% "scalacheck" % "1.13.4" % "test",
-  "junit" % "junit" % "4.8.1" % "test"
-)*/
-
 resolvers ++= Seq("Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/",
   Resolver.bintrayRepo("hseeberger", "maven"))
 
@@ -27,11 +17,11 @@ libraryDependencies ++= {
     "com.typesafe.akka" %% "akka-slf4j" % AkkaVersion,
     "com.typesafe.akka" %% "akka-http" % AkkaHttpVersion,
     "com.typesafe.akka" %% "akka-stream" % AkkaVersion,
-    //"ch.qos.logback"    %  "logback-classic" % "1.1.2",
     "org.json4s"        %% "json4s-native"   % Json4sVersion,
     "org.json4s"        %% "json4s-core"     % Json4sVersion,
     "org.json4s"        %% "json4s-jackson"  % Json4sVersion,
     "org.json4s"        %% "json4s-ext"      % Json4sVersion,
-    "de.heikoseeberger" %% "akka-http-json4s" % "1.20.1"
+    "de.heikoseeberger" %% "akka-http-json4s" % "1.20.1",
+    "org.scalatest" %% "scalatest" % "3.0.1" % Test
   )
 }

src/main/scala/com/lansalo/json/serializer/AgeSerializer.scala

@@ -6,7 +6,6 @@ import org.json4s.JsonAST.JInt
 
 case object AgeSerializer extends CustomSerializer[Age](format => ( {
   case JInt(age) => new Age(age.intValue)
-  },
-  {
+}, {
   case age: Int => JInt(BigInt(age))
 }))

src/main/scala/com/lansalo/json/serializer/GenderSerializer.scala

@@ -5,10 +5,9 @@ import org.json4s.CustomSerializer
 import org.json4s.JsonAST.JString
 
 case object GenderSerializer extends CustomSerializer[Gender](format => ( {
-    case JString(gender) => GenderHelper.toGender(gender).get
-  },
-  {
-    case gender: Gender => JString(gender.sex)
-  })
+  case JString(gender) => GenderHelper.toGender(gender).get
+}, {
+  case gender: Gender => JString(gender.sex)
+})
 )
 

src/main/scala/com/lansalo/routes/UserRoutes.scala

@@ -40,7 +40,6 @@ trait UserRoutes extends JsonSupport {
         get {
           complete(User(name, new Age(22), Female))
         }
-
       }
   }
 }

src/test/scala/com/lansalo/json/serializer/AgeSerializerSpec.scala

@@ -0,0 +1,16 @@
+package com.lansalo.json.serializer
+
+import com.lansalo.model.Age
+import org.json4s.JsonAST.JInt
+import org.json4s.DefaultFormats
+import org.scalatest.{FlatSpec, MustMatchers}
+
+class AgeSerializerSpec extends FlatSpec with MustMatchers {
+
+  implicit val formats = DefaultFormats + AgeSerializer
+
+  "AgeSerializer" should "deserialize 22 into the corresponding object" in {
+    JInt(22).extract[Age] mustBe new Age(22)
+  }
+
+}

src/test/scala/com/lansalo/json/serializer/GenderSerializerSpec.scala

@@ -0,0 +1,27 @@
+package com.lansalo.json.serializer
+
+import com.lansalo.model.{Gender, Male}
+import org.json4s.JsonAST.JString
+import org.json4s.native.Serialization.write
+import org.json4s.{DefaultFormats, MappingException}
+import org.scalatest.{FlatSpec, MustMatchers}
+
+class GenderSerializerSpec extends FlatSpec with MustMatchers {
+
+  implicit val formats = DefaultFormats + GenderSerializer
+
+  "GenderSerializer" should "deserialize male into the corresponding object" in {
+    JString("male").extract[Gender] mustBe Male
+  }
+
+  it should "serialize male into json" in {
+    write[Gender](Male) mustBe """"male""""
+  }
+
+  it should " not serialize unrecognized genders and throw an exception" in {
+    intercept[MappingException] {
+      JString("bogus").extract[Gender]
+    }
+  }
+
+}