feat(redis): graviton instance test case (#58)

modules/redis/tests/graviton/main.tf

@@ -0,0 +1,38 @@
+terraform {
+  required_providers {
+    test = {
+      source = "terraform.io/builtin/test"
+    }
+  }
+}
+
+module "vpc" {
+  source  = "Young-ook/vpc/aws"
+  version = "1.0.5"
+}
+
+module "main" {
+  source  = "../.."
+  vpc     = module.vpc.vpc.id
+  subnets = values(module.vpc.subnets["public"])
+  cluster = {
+    password      = "supersuperSecr0et"
+    instance_type = "cache.m6g.large"
+  }
+}
+
+resource "test_assertions" "pet_name" {
+  component = "pet_name"
+  check "pet_name" {
+    description = "default random pet name"
+    condition   = can(length(regexall("^redis", module.main.cluster.id)) > 0)
+  }
+}
+
+resource "test_assertions" "password" {
+  component = "password"
+  check "custom_password" {
+    description = "custom password"
+    condition   = module.main.user.password == "supersuperSecr0et" ? true : false
+  }
+}