try to fix issue with Option[Iterable] type (#310)

Author: pjfanning

src/main/scala/com/github/swagger/scala/converter/SwaggerScalaModelConverter.scala

@@ -10,14 +10,13 @@ import io.swagger.v3.core.jackson.ModelResolver
 import io.swagger.v3.core.util.{Json, PrimitiveType}
 import io.swagger.v3.oas.annotations.Parameter
 import io.swagger.v3.oas.annotations.media.Schema.RequiredMode
-import io.swagger.v3.oas.annotations.media.{ArraySchema, Schema => SchemaAnnotation}
-import io.swagger.v3.oas.models.media.{MapSchema, ObjectSchema, Schema}
+import io.swagger.v3.oas.annotations.media.{ArraySchema => ArraySchemaAnnotation, Schema => SchemaAnnotation}
+import io.swagger.v3.oas.models.media.{ArraySchema, MapSchema, ObjectSchema, Schema}
 import org.slf4j.LoggerFactory
 
 import java.lang.annotation.Annotation
 import java.lang.reflect.ParameterizedType
 import java.util
-import java.util.List
 import scala.collection.JavaConverters._
 import scala.util.Try
 import scala.util.control.NonFatal
@@ -109,7 +108,7 @@ object SwaggerScalaModelConverter {
           s.requiredMode()
         }
       }
-      case a: ArraySchema => {
+      case a: ArraySchemaAnnotation => {
         if (a.arraySchema().requiredMode() == RequiredMode.AUTO) {
           if (a.arraySchema().required()) {
             RequiredMode.REQUIRED
@@ -350,6 +349,11 @@ class SwaggerScalaModelConverter extends ModelResolver(SwaggerScalaModelConverte
   private[converter] def tryCorrectSchema(itemSchema: Schema[_], primitiveType: PrimitiveType): Schema[_] = {
     itemSchema match {
       case ms: MapSchema => ms
+      case as: ArraySchema => {
+        val correctedSchema = tryCorrectSchema(as.getItems, primitiveType)
+        as.setItems(correctedSchema)
+        as
+      }
       case _ => {
         Try {
           val primitiveProperty = primitiveType.createProperty()

src/test/scala/com/github/swagger/scala/converter/ModelPropertyParserTest.scala

@@ -73,17 +73,19 @@ class ModelPropertyParserTest extends AnyFlatSpec with BeforeAndAfterEach with M
   it should "process Option[Set[String]] as string" in new PropertiesScope[OptionSetString] {
     val values = model.value.getProperties().get("values")
     values should not be (null)
-    // TODO fix broken assertion
-    //values shouldBe an[ArraySchema]
+    values shouldBe an[ArraySchema]
     values.getRequired shouldBe null
+    values.asInstanceOf[ArraySchema].getItems shouldBe a[StringSchema]
   }
 
   it should "process Option[Seq[Long]] as string" in new PropertiesScope[OptionSeqLong] {
     val values = model.value.getProperties().get("values")
     values should not be (null)
-    // TODO fix broken assertion
-    // values shouldBe an[ArraySchema]
+    values shouldBe an[ArraySchema]
     values.getRequired shouldBe null
+    val itemSchema = values.asInstanceOf[ArraySchema].getItems
+    itemSchema shouldBe an[IntegerSchema]
+    itemSchema.asInstanceOf[IntegerSchema].getFormat shouldBe "int64"
   }
 
   it should "process Option[Model] as Model" in new PropertiesScope[ModelWOptionModel] {