From 68b38b4904cc5f0e5fc7ed6203aca5bd6e466dad Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Tue, 23 Sep 2014 16:55:19 -0700
Subject: [PATCH] terraform: test case for cascading input variables (variable
 to variable)

---
 terraform/context_test.go                     | 25 +++++++++++++++++++
 terraform/terraform_test.go                   | 17 +++++++++++++
 .../plan-module-input-var/child/main.tf       |  5 ++++
 .../plan-module-input-var/main.tf             | 10 ++++++++
 4 files changed, 57 insertions(+)
 create mode 100644 terraform/test-fixtures/plan-module-input-var/child/main.tf
 create mode 100644 terraform/test-fixtures/plan-module-input-var/main.tf

diff --git a/terraform/context_test.go b/terraform/context_test.go
index c5c70d114..6ee02a3b9 100644
--- a/terraform/context_test.go
+++ b/terraform/context_test.go
@@ -1474,6 +1474,31 @@ func TestContextPlan_moduleInput(t *testing.T) {
 	}
 }
 
+func TestContextPlan_moduleInputFromVar(t *testing.T) {
+	m := testModule(t, "plan-module-input-var")
+	p := testProvider("aws")
+	p.DiffFn = testDiffFn
+	ctx := testContext(t, &ContextOpts{
+		Module: m,
+		Providers: map[string]ResourceProviderFactory{
+			"aws": testProviderFuncFixed(p),
+		},
+		Variables: map[string]string{
+			"foo": "52",
+		},
+	})
+
+	plan, err := ctx.Plan(nil)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	actual := strings.TrimSpace(plan.String())
+	expected := strings.TrimSpace(testTerraformPlanModuleInputVarStr)
+	if actual != expected {
+		t.Fatalf("bad:\n%s", actual)
+	}
+}
 func TestContextPlan_moduleOrphans(t *testing.T) {
 	m := testModule(t, "plan-modules-remove")
 	p := testProvider("aws")
diff --git a/terraform/terraform_test.go b/terraform/terraform_test.go
index c37700569..3914e478f 100644
--- a/terraform/terraform_test.go
+++ b/terraform/terraform_test.go
@@ -528,6 +528,23 @@ STATE:
 <no state>
 `
 
+const testTerraformPlanModuleInputVarStr = `
+DIFF:
+
+CREATE: aws_instance.bar
+  foo:  "" => "2"
+  type: "" => "aws_instance"
+
+module.child:
+  CREATE: aws_instance.foo
+    foo:  "" => "52"
+    type: "" => "aws_instance"
+
+STATE:
+
+<no state>
+`
+
 const testTerraformPlanModuleOrphansStr = `
 DIFF:
 
diff --git a/terraform/test-fixtures/plan-module-input-var/child/main.tf b/terraform/test-fixtures/plan-module-input-var/child/main.tf
new file mode 100644
index 000000000..c1a00c5a3
--- /dev/null
+++ b/terraform/test-fixtures/plan-module-input-var/child/main.tf
@@ -0,0 +1,5 @@
+variable "input" {}
+
+resource "aws_instance" "foo" {
+    foo = "${var.input}"
+}
diff --git a/terraform/test-fixtures/plan-module-input-var/main.tf b/terraform/test-fixtures/plan-module-input-var/main.tf
new file mode 100644
index 000000000..3fba315ee
--- /dev/null
+++ b/terraform/test-fixtures/plan-module-input-var/main.tf
@@ -0,0 +1,10 @@
+variable "foo" {}
+
+module "child" {
+    input = "${var.foo}"
+    source = "./child"
+}
+
+resource "aws_instance" "bar" {
+    foo = "2"
+}