lookup and validation

project2/base.tf

@@ -1,4 +1,15 @@
-variable "a" {}
+terraform {
+  experiments = [
+    variable_validation
+  ]
+}
+
+variable "a" {
+  validation {
+    condition = can(regex("foo|aze|qsd", var.a))
+    error_message = "Valid values are foo, aze, qsd."
+  }
+}
 variable "b" {
   default = "test"
 }
@@ -25,5 +36,12 @@ output "ov3" {
   value = "${var.c[2]}"
 }
 output "ov4" {
+  value = "${var.d}"
+}
+output "ov4_foo" {
   value = "${var.d.foo}"
 }
+
+output "ov4_lookup" {
+  value = "${lookup(var.d, var.a)}"
+}

project2/terraform.tfstate

@@ -1,11 +1,11 @@
 {
   "version": 4,
   "terraform_version": "0.12.24",
-  "serial": 9,
+  "serial": 11,
   "lineage": "53b98038-185e-af43-6c6c-521354912695",
   "outputs": {
     "ov1": {
-      "value": "foobar",
+      "value": "foo",
       "type": "string"
     },
     "ov2": {
@@ -17,6 +17,21 @@
       "type": "string"
     },
     "ov4": {
+      "value": {
+        "aze": "rty",
+        "foo": "bar",
+        "qsd": "fgh"
+      },
+      "type": [
+        "map",
+        "string"
+      ]
+    },
+    "ov4_foo": {
+      "value": "bar",
+      "type": "string"
+    },
+    "ov4_lookup": {
       "value": "bar",
       "type": "string"
     }

project2/terraform.tfstate.backup

@@ -1,7 +1,7 @@
 {
   "version": 4,
   "terraform_version": "0.12.24",
-  "serial": 8,
+  "serial": 10,
   "lineage": "53b98038-185e-af43-6c6c-521354912695",
   "outputs": {
     "ov1": {
@@ -13,7 +13,22 @@
       "type": "string"
     },
     "ov3": {
-      "value": "fgh",
+      "value": "baz",
+      "type": "string"
+    },
+    "ov4": {
+      "value": {
+        "aze": "rty",
+        "foo": "bar",
+        "qsd": "fgh"
+      },
+      "type": [
+        "map",
+        "string"
+      ]
+    },
+    "ov4_foo": {
+      "value": "bar",
       "type": "string"
     }
   },

project2/terraform.tfvars

@@ -1 +1 @@
-a = "foobar"
+a = "foo"