Update api-gateway tests

modules/api-gateway/README.md

@@ -1,4 +1,4 @@
-# Api Gateway
+# API Gateway
 This module allows creating an API with its associated API config and API gateway. It also allows you grant IAM roles on the created resources.
 
 # Examples
@@ -15,46 +15,46 @@ module "gateway" {
   # ...
   EOT
 }
-# tftest modules=1 resources=4
+# tftest modules=1 resources=4 inventory=basic.yaml
 ```
 
-## Basic example + customer service account
+## Use existing service account
 ```hcl
 module "gateway" {
   source                = "./fabric/modules/api-gateway"
   project_id            = "my-project"
   api_id                = "api"
   region                = "europe-west1"
-  spec                  = <<EOT
-  # The OpenAPI spec contents
-  # ...
-  EOT
   service_account_email = "sa@my-project.iam.gserviceaccount.com"
   iam = {
     "roles/apigateway.admin" = ["user:user@example.com"]
   }
+  spec = <<EOT
+  # The OpenAPI spec contents
+  # ...
+  EOT
 }
-# tftest modules=1 resources=7
+# tftest modules=1 resources=7 inventory=existing-sa.yaml
 ```
 
-## Basic example + service account creation
+## Create service account
 ```hcl
 module "gateway" {
   source                 = "./fabric/modules/api-gateway"
   project_id             = "my-project"
   api_id                 = "api"
   region                 = "europe-west1"
-  spec                   = <<EOT
-  # The OpenAPI spec contents
-  # ...
-  EOT
   service_account_create = true
   iam = {
     "roles/apigateway.admin"  = ["user:mirene@google.com"]
     "roles/apigateway.viewer" = ["user:mirene@google.com"]
   }
+  spec = <<EOT
+  # The OpenAPI spec contents
+  # ...
+  EOT
 }
-# tftest modules=1 resources=11
+# tftest modules=1 resources=11 inventory=create-sa.yaml
 ```
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