feat: update main.tf

main.tf

@@ -11,10 +11,11 @@ resource "azurerm_mssql_server" "this" {
 }
 
 resource "azurerm_mssql_database" "this" {
-  name        = var.database_name
-  server_id   = azurerm_mssql_server.this.id
-  sku_name    = var.sku_name
-  max_size_gb = var.max_size_gb
+  name           = var.database_name
+  server_id      = azurerm_mssql_server.this.id
+  sku_name       = var.sku_name
+  max_size_gb    = var.max_size_gb
+  zone_redundant = var.zone_redundant
 
   tags = var.tags
 }

tests/zone_redundant.tftest.hcl

@@ -0,0 +1,39 @@
+# Unit tests for the zone_redundant variable on the SQL database module.
+# Uses mock_provider for azurerm so no real cloud calls are made.
+
+mock_provider "azurerm" {}
+
+variables {
+  server_name    = "test-sql-server-xyz"
+  database_name  = "testdb"
+  admin_login    = "sqladmin"
+  admin_password = "P@ssw0rd1234!"
+}
+
+run "zone_redundant_defaults_to_false" {
+  command = plan
+
+  assert {
+    condition     = var.zone_redundant == false
+    error_message = "zone_redundant must default to false to preserve existing behaviour."
+  }
+
+  assert {
+    condition     = azurerm_mssql_database.this.zone_redundant == false
+    error_message = "azurerm_mssql_database.this.zone_redundant should be false when the variable is unset."
+  }
+}
+
+run "zone_redundant_can_be_enabled" {
+  command = plan
+
+  variables {
+    zone_redundant = true
+    sku_name       = "P1"
+  }
+
+  assert {
+    condition     = azurerm_mssql_database.this.zone_redundant == true
+    error_message = "azurerm_mssql_database.this.zone_redundant should be true when var.zone_redundant = true."
+  }
+}

variables.tf

@@ -44,6 +44,12 @@ variable "max_size_gb" {
   default     = 2
 }
 
+variable "zone_redundant" {
+  description = "Whether the database is zone redundant (spans multiple Availability Zones). Only supported on Premium and Business Critical service tiers, and General Purpose / Hyperscale tiers in supported regions."
+  type        = bool
+  default     = false
+}
+
 variable "tags" {
   description = "Tags to apply to resources"
   type        = map(string)