[Ruby][client] Handle enums (and other scalars) in oneOf and anyOf schemas (#17515)

* Handle enums in oneOf and anyOf schemas

* Update specs

samples/client/petstore/ruby-httpx/spec/models/cow_spec.rb

@@ -0,0 +1,30 @@
+=begin
+#OpenAPI Petstore
+
+#This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+The version of the OpenAPI document: 1.0.0
+
+Generated by: https://openapi-generator.tech
+OpenAPI Generator version: 7.3.0-SNAPSHOT
+
+=end
+
+require 'spec_helper'
+require 'json'
+require 'date'
+
+# Unit tests for Petstore::Cow
+# Automatically generated by openapi-generator (https://openapi-generator.tech)
+# Please update as you see appropriate
+describe Petstore::Cow do
+  let(:instance) { Petstore::Cow.new }
+
+  describe 'test an instance of Cow' do
+    it 'should create an instance of Cow' do
+      # uncomment below to test the instance creation
+      #expect(instance).to be_instance_of(Petstore::Cow)
+    end
+  end
+
+end

samples/client/petstore/ruby-httpx/spec/models/mamal_with_enum_spec.rb

@@ -0,0 +1,32 @@
+=begin
+#OpenAPI Petstore
+
+#This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+The version of the OpenAPI document: 1.0.0
+
+Generated by: https://openapi-generator.tech
+OpenAPI Generator version: 7.3.0-SNAPSHOT
+
+=end
+
+require 'spec_helper'
+require 'json'
+require 'date'
+
+# Unit tests for Petstore::MamalWithEnum
+# Automatically generated by openapi-generator (https://openapi-generator.tech)
+# Please update as you see appropriate
+describe Petstore::MamalWithEnum do
+  describe '.openapi_one_of' do
+    it 'lists the items referenced in the oneOf array' do
+      expect(described_class.openapi_one_of).to_not be_empty
+    end
+  end
+
+  describe '.build' do
+    it 'returns the correct model' do
+      # assertion here. ref: https://rspec.info/features/3-12/rspec-expectations/built-in-matchers/
+    end
+  end
+end