Add more test cases

Author: Steven Nemetz

test/main.tf

@@ -27,3 +27,11 @@ module "xyz" {
   source  = "../"
   value   = "xyz"
 }
+module "t_and_f" {
+  source  = "../"
+  value   = "${module.true.value && module.false.value}"
+}
+module "t_or_f" {
+  source  = "../"
+  value   = "${module.true.value || module.false.value}"
+}

test/outputs.tf

@@ -20,3 +20,9 @@ output "false" {
 output "xyz" {
   value   = "${module.xyz.value}"
 }
+output "t_and_f" {
+  value   = "${module.t_and_f.value}"
+}
+output "t_or_f" {
+  value   = "${module.t_or_f.value}"
+}