feat: Validated unit tests and manual tests for OIDC custom property integration

Author: gogoyan11

examples/oidc_custom_property/main.tf

@@ -0,0 +1,39 @@
+terraform {
+  required_providers {
+    github = {
+      source = "integrations/github"
+    }
+  }
+}
+
+provider "github" {
+  owner = var.github_owner
+}
+
+variable "github_owner" {
+  description = "The GitHub organization to manage"
+  type        = string
+}
+
+# Step 1: Define an org-level custom property
+resource "github_organization_custom_properties" "environment" {
+  property_name  = "environment"
+  value_type     = "single_select"
+  required       = false
+  allowed_values = ["production", "staging", "development"]
+}
+
+# Step 2: Include the custom property in OIDC tokens
+resource "github_actions_organization_oidc_custom_property_inclusion" "environment" {
+  custom_property_name = "environment"
+  depends_on           = [github_organization_custom_properties.environment]
+}
+
+# Step 3: Read back the inclusions via data source
+data "github_actions_organization_oidc_custom_property_inclusions" "current" {
+  depends_on = [github_actions_organization_oidc_custom_property_inclusion.environment]
+}
+
+output "included_properties" {
+  value = data.github_actions_organization_oidc_custom_property_inclusions.current.custom_property_names
+}