add basic tests

tests/environment/locals.tf

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+locals {
+  workspace_id = uuid()
+}

tests/environment/main.tf

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+resource "azurerm_resource_group" "rg" {
+  name     = local.workspace_id
+  location = "West Europe"
+}

tests/environment/outputs.tf

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+output "workspace_id" {
+  value = local.workspace_id
+}
+
+output "resource_group_name" {
+  value = azurerm_resource_group.rg.name
+}
+
+output "resource_group_location" {
+  value = azurerm_resource_group.rg.location
+}

tests/environment/versions.tf

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+terraform {
+  required_version = ">=1.3.0"
+
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = "~>3.0"
+    }
+  }
+}

tests/testing.tftest.hcl

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+provider "azurerm" {
+  features {}
+}
+
+run "setup" {
+  module {
+    source = "./tests/environment"
+  }
+}
+
+variables {}
+
+run "plan" {
+  command = plan
+
+  variables {
+    name                = run.setup.workspace_id
+    resource_group_name = run.setup.resource_group_name
+    location            = run.setup.resource_group_location
+  }
+
+  assert {
+    condition     = azurerm_key_vault.vault.name == run.setup.workspace_id
+    error_message = "The route table name input variable is being modified."
+  }
+
+  assert {
+    condition     = azurerm_key_vault.vault.resource_group_name == run.setup.resource_group_name
+    error_message = "The route table resource group input variable is being modified."
+  }
+
+  assert {
+    condition     = azurerm_key_vault.vault.location == run.setup.resource_group_location
+    error_message = "The route table location input variable is being modified."
+  }
+}
+
+run "apply" {
+  command = apply
+
+  variables {
+    name                = run.setup.workspace_id
+    resource_group_name = run.setup.resource_group_name
+    location            = run.setup.resource_group_location
+  }
+}