Use wrapper module to work around upstream issue

hashicorp/terraform#31315

common/configuration/tests/non_string_values/test_object.tf

@@ -1,71 +1,5 @@
-variable "test_configuration" {
-  type = map(object({
-    test_string = optional(string)
-    test_list_string = optional(list(string))
-    test_map_string = optional(map(string))
-    test_list_object = optional(list(object({
-      key = string
-    })))
-    test_object = optional(object({
-      key = string
-    }))
-  }))
-  description = "Map with per workspace module configuration."
-  default = {
-    apps = {
-      test_string = "from_apps"
-
-      test_list_string = [
-        "from_apps"
-      ]
-
-      test_map_string = {
-        key = "from_apps"
-      }
-
-      test_list_object = [{
-        key = "from_apps"
-      }]
-
-      test_object = {
-        key = "from_apps"
-      }
-    }
-
-    ops = {
-      test_string = "from_ops"
-
-      test_list_string = [
-        "from_ops"
-      ]
-
-      test_map_string = {
-        key = "from_ops"
-      }
-
-      test_list_object = [{
-        key = "from_ops"
-      }]
-
-      test_object = {
-        key = "from_ops"
-      }
-    }
-
-    loc = {
-      test_list_object = [{
-        key = "from_loc"
-      }]
-    }
-  }
-}
-
 module "mut_object" {
-  source = "../.."
-
-  configuration = var.test_configuration
-
-  base_key = "apps"
+  source = "./wrapper"
 }
 
 resource "test_assertions" "overwrite_object" {

common/configuration/tests/non_string_values/wrapper/main.tf

@@ -0,0 +1,77 @@
+terraform {
+  experiments = [module_variable_optional_attrs]
+}
+
+variable "test_configuration" {
+  type = map(object({
+    test_string      = optional(string)
+    test_list_string = optional(list(string))
+    test_map_string  = optional(map(string))
+    test_list_object = optional(list(object({
+      key = string
+    })))
+    test_object = optional(object({
+      key = string
+    }))
+  }))
+  description = "Map with per workspace module configuration."
+  default = {
+    apps = {
+      test_string = "from_apps"
+
+      test_list_string = [
+        "from_apps"
+      ]
+
+      test_map_string = {
+        key = "from_apps"
+      }
+
+      test_list_object = [{
+        key = "from_apps"
+      }]
+
+      test_object = {
+        key = "from_apps"
+      }
+    }
+
+    ops = {
+      test_string = "from_ops"
+
+      test_list_string = [
+        "from_ops"
+      ]
+
+      test_map_string = {
+        key = "from_ops"
+      }
+
+      test_list_object = [{
+        key = "from_ops"
+      }]
+
+      test_object = {
+        key = "from_ops"
+      }
+    }
+
+    loc = {
+      test_list_object = [{
+        key = "from_loc"
+      }]
+    }
+  }
+}
+
+module "mut_object" {
+  source = "../../.."
+
+  configuration = var.test_configuration
+
+  base_key = "apps"
+}
+
+output "merged" {
+  value = module.mut_object.merged
+}