fixed docs generation of referenced enums when they're inside of a collection

docs/openapi-docs/src/test/resources/coproduct/expected_coproduct_discriminator_with_enum_circe.yml

@@ -34,4 +34,4 @@ components:
             - blue
             - red
         shapeType:
-          type: string
+          type: string

docs/openapi-docs/src/test/resources/enum/expected_enum_collections.yml

@@ -0,0 +1,36 @@
+openapi: 3.0.3
+info:
+  title: Enums
+  version: '1.0'
+paths:
+  /:
+    get:
+      operationId: getRoot
+      responses:
+        '200':
+          description: ''
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Square'
+components:
+  schemas:
+    CornerStyle:
+      type: string
+      enum:
+        - rounded
+        - straight
+    Square:
+      type: object
+      properties:
+        cornerStyle:
+          $ref: '#/components/schemas/CornerStyle'
+        tags:
+          type: array
+          items:
+            $ref: '#/components/schemas/Tag'
+    Tag:
+      type: string
+      enum:
+        - tag1
+        - tag2

docs/openapi-docs/src/test/scala-2/sttp/tapir/docs/openapi/VerifyYamlEnumerationTest.scala

@@ -6,6 +6,7 @@ import enumeratum.{EnumEntry, _}
 import io.circe.generic.auto._
 import org.scalatest.funsuite.AnyFunSuite
 import org.scalatest.matchers.should.Matchers
+import sttp.tapir.Schema.SName
 import sttp.tapir.docs.openapi.VerifyYamlEnumerationTest._
 import sttp.tapir.generic.auto._
 import sttp.tapir.json.circe._
@@ -82,6 +83,16 @@ class VerifyYamlEnumerationTest extends AnyFunSuite with Matchers {
 
     noIndentation(actualYaml) shouldBe expectedYaml
   }
+
+  test("should support optional enums and sequences of enums") {
+    implicit val shapeCodec: io.circe.Codec[Square] = null
+    val e = endpoint.get.out(jsonBody[Square])
+
+    val expectedYaml = load("enum/expected_enum_collections.yml")
+    val actualYaml = OpenAPIDocsInterpreter().toOpenAPI(e, "Enums", "1.0").toYaml
+
+    noIndentation(actualYaml) shouldBe expectedYaml
+  }
 }
 
 object VerifyYamlEnumerationTest {
@@ -122,4 +133,26 @@ object VerifyYamlEnumerationTest {
 
   case class Error1Response(error: ErrorCode)
   case class Error2Response(error: ErrorCode)
+
+  object CornerStyle extends Enumeration {
+    type CornerStyle = Value
+
+    val Rounded = Value("rounded")
+    val Straight = Value("straight")
+
+    implicit def schemaForEnum: Schema[Value] =
+      Schema.string.validate(Validator.enumeration(values.toList, v => Option(v), Some(SName("CornerStyle"))))
+  }
+
+  object Tag extends Enumeration {
+    type Tag = Value
+
+    val Tag1 = Value("tag1")
+    val Tag2 = Value("tag2")
+
+    implicit def schemaForEnum: Schema[Value] =
+      Schema.string.validate(Validator.enumeration(values.toList, v => Option(v), Some(SName("Tag"))))
+  }
+
+  case class Square(cornerStyle: Option[CornerStyle.Value], tags: Seq[Tag.Value])
 }

docs/openapi-docs/src/test/scala/sttp/tapir/docs/openapi/VerifyYamlCoproductTest.scala

@@ -26,8 +26,10 @@ class VerifyYamlCoproductTest extends AnyFunSuite with Matchers {
     val endpoint = sttp.tapir.endpoint.get.out(jsonBody[Shape])
 
     val expectedYaml = load("coproduct/expected_coproduct_discriminator_with_enum_circe.yml")
-    val actualYaml = OpenAPIDocsInterpreter().toOpenAPI(endpoint, "My Bookshop", "1.0").toYaml
-
+    val actualYaml =
+      OpenAPIDocsInterpreter()
+        .toOpenAPI(endpoint, "My Bookshop", "1.0")
+        .toYaml
     noIndentation(actualYaml) shouldBe expectedYaml
   }