Test case for aws_route_table data source

main.tf

provider "aws" {
    region = "us-east-1"
}

data "aws_route_table" "art" {
    subnet_id = "subnet-########"
}

data "template_file" "art" {
    template = "$${rtb_route}"

    vars {
        rtb_route = "${data.aws_route_table.art.routes.0.cidr_block}"
    }
}

resource "null_resource" "art" {
    triggers {
        template = "${data.template_file.art.rendered}"
    }

    provisioner "local-exec" {
        command = "echo \"${data.template_file.art.rendered}\" > art.txt"
    }
}