Feature/fixing sampler macro (#79)

* Checking types of known fields

* Adding a test for the edge case

* Fixing edge case for known fields

* Removing implicit requirements where they are not used

Author: alexflav23

util-samplers/src/main/scala/com/outworkers/util/empty/EmptyGenerators.scala

@@ -15,7 +15,7 @@ trait EmptyGenerators {
     */
   def void[T : Empty]: T = implicitly[Empty[T]].sample
 
-  def voidOpt[T : Empty]: Option[T] = Option.empty[T]
+  def voidOpt[T]: Option[T] = Option.empty[T]
   def voidMap[K : Empty, V: Empty]: Map[K, V] = Map.empty[K, V]
 
   /**
@@ -26,8 +26,7 @@ trait EmptyGenerators {
     * @return A Collection of "size" elements with type T.
     */
   def void[M[X] <: TraversableOnce[X], T](size: Int = 0)(
-    implicit cbf: CanBuildFrom[Nothing, T, M[T]],
-    proof: Empty[T]
+    implicit cbf: CanBuildFrom[Nothing, T, M[T]]
   ): M[T] = cbf().result()
 
   def oneOf[T](list: Seq[T]): T = Gen.oneOf(list).sample.get

util-samplers/src/main/scala/com/outworkers/util/samplers/SamplerMacro.scala

@@ -230,7 +230,7 @@ class SamplerMacro(val c: blackbox.Context) extends AnnotationToolkit with Black
     accessor match {
       case MapType(col) => col.default
       case OptionType(opt) => accessor.name match {
-        case KnownField(derived) => {
+        case KnownField(derived) if accessor.paramType =:= typeOf[String] => {
 
           val fillOptionsImp = c.inferImplicitValue(fillOptions, silent = true)
 
@@ -248,7 +248,7 @@ class SamplerMacro(val c: blackbox.Context) extends AnnotationToolkit with Black
       }
 
       case _ => accessor.name match {
-        case KnownField(derived) => {
+        case KnownField(derived) if accessor.paramType =:= typeOf[String] => {
 
           q"$prefix.gen[$derived].value"
         }

util-samplers/src/test/scala/com/outworkers/util/samplers/GeneratorsTest.scala

@@ -78,6 +78,11 @@ class GeneratorsTest extends FlatSpec with Matchers with GeneratorDrivenProperty
     sample shouldEqual sample
   }
 
+  it should "skip dictionary lookups for non stringly typed fields" in {
+    val sample = gen[EdgeCase]
+    Console.println(sample)
+  }
+
 
   it should "automatically generate a sampler for a nested Enumeration inside a CaseClass" in {
     val sample = gen[IndexedSeq[String]]

util-samplers/src/test/scala/org/outworkers/domain/test/domain.scala

@@ -47,6 +47,13 @@ case class NestedOptions(
   collections: Option[CollectionSample]
 )
 
+case class CustomEmailWrapper(email: String)
+
+case class EdgeCase(
+  id: UUID,
+  email: CustomEmailWrapper
+)
+
 import java.util.UUID
 
 import org.outworkers.domain.test._