[gen] verify issue #3077 is fixed (#3178)

[gen] adding test that has previously would have failed - issue has been fixed in another commit

Co-authored-by: Nabil Abdel-Hafeez <[email protected]>

zio-http-gen/src/test/resources/ComponentAliasKey.scala

@@ -0,0 +1,9 @@
+package test.component
+
+import zio.prelude.Newtype
+import zio.schema.Schema
+import java.util.UUID
+
+object Key extends Newtype[UUID] {
+  implicit val schema: Schema[Key.Type] = Schema.primitive[UUID].transform(wrap, unwrap)
+}

zio-http-gen/src/test/resources/inline_schema_alias_only_as_key_schema.yaml

@@ -0,0 +1,36 @@
+info:
+  title: Dummy Service
+  version: 0.0.1
+servers:
+  - url: http://127.0.0.1:5000/
+tags:
+  - name: Dummy_API
+paths:
+  /api/text_by_key:
+    get:
+      operationId: text_by_key
+      description: Get a dictionary mapping keys to text
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ObjectWithDictionary'
+          description: OK
+openapi: 3.0.3
+components:
+  schemas:
+    Key:
+      type: string
+      format: uuid
+    ObjectWithDictionary:
+      type: object
+      required:
+        - dict
+      properties:
+        dict:
+          type: object
+          additionalProperties:
+            type: string
+            x-string-key-schema:
+              $ref: '#/components/schemas/Key'

zio-http-gen/src/test/scala/zio/http/gen/scala/CodeGenSpec.scala

@@ -979,6 +979,29 @@ object CodeGenSpec extends ZIOSpecDefault {
           }
         }
       } @@ TestAspect.exceptScala3,
+      test("Schema with newtype only referenced as dictionary key") {
+        val openAPIString = stringFromResource("/inline_schema_alias_only_as_key_schema.yaml")
+
+        openApiFromYamlString(openAPIString) { oapi =>
+          codeGenFromOpenAPI(
+            oapi,
+            Config.default.copy(generateSafeTypeAliases = true),
+          ) { testDir =>
+            allFilesShouldBe(
+              testDir.toFile,
+              List(
+                "api/Text_by_key.scala",
+                "component/Key.scala",
+                "component/ObjectWithDictionary.scala",
+              ),
+            ) && fileShouldBe(
+              testDir,
+              "component/Key.scala",
+              "/ComponentAliasKey.scala",
+            )
+          }
+        }
+      } @@ TestAspect.exceptScala3,
       test("Generate all responses") {
         val oapi =
           OpenAPI(