rename iam variables in gcs module

tests/modules/gcs/fixture/main.tf

@@ -19,7 +19,7 @@ module "test" {
   project_id                  = "my-project"
   uniform_bucket_level_access = var.uniform_bucket_level_access
   force_destroy               = var.force_destroy
-  iam_members                 = var.iam_members
+  iam                         = var.iam
   labels                      = var.labels
   logging_config              = var.logging_config
   name                        = "bucket-a"

tests/modules/gcs/fixture/variables.tf

@@ -24,8 +24,8 @@ variable "force_destroy" {
   default = true
 }
 
-variable "iam_members" {
-  type    = map(set(string))
+variable "iam" {
+  type    = map(list(string))
   default = {}
 }
 

tests/modules/gcs/test_plan.py

@@ -55,7 +55,6 @@ def test_config_values(plan_runner):
 
 def test_iam(plan_runner):
   "Test bucket resources with iam roles and members."
-  iam_members = '{ "roles/storage.admin" = ["user:a@b.com"] }'
-  _, resources = plan_runner(
-      FIXTURES_DIR, iam_members=iam_members)
+  iam = '{ "roles/storage.admin" = ["user:a@b.com"] }'
+  _, resources = plan_runner(FIXTURES_DIR, iam=iam)
   assert len(resources) == 2