terraform: basic apply tests

terraform/state.go

@@ -1,6 +1,8 @@
 package terraform
 
 import (
+	"bytes"
+	"fmt"
 	"sync"
 
 	"github.com/hashicorp/terraform/config"
@@ -21,6 +23,21 @@ func (s *State) init() {
 	})
 }
 
+func (s *State) String() string {
+	var buf bytes.Buffer
+
+	for k, rs := range s.Resources {
+		buf.WriteString(fmt.Sprintf("%s:\n", k))
+		buf.WriteString(fmt.Sprintf("  ID = %s\n", rs.ID))
+
+		for ak, av := range rs.Attributes {
+			buf.WriteString(fmt.Sprintf("  %s = %s\n", ak, av))
+		}
+	}
+
+	return buf.String()
+}
+
 // ResourceState holds the state of a resource that is used so that
 // a provider can find and manage an existing resource as well as for
 // storing attributes that are uesd to populate variables of child

terraform/terraform_test.go

@@ -207,7 +207,10 @@ func TestTerraformApply(t *testing.T) {
 	tf := testTerraform(t, "apply-good")
 
 	s := &State{}
-	d := &Diff{}
+	d, err := tf.Diff(s)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
 
 	state, err := tf.Apply(s, d)
 	if err != nil {
@@ -217,6 +220,12 @@ func TestTerraformApply(t *testing.T) {
 	if len(state.Resources) < 2 {
 		t.Fatalf("bad: %#v", state.Resources)
 	}
+
+	actual := strings.TrimSpace(state.String())
+	expected := strings.TrimSpace(testTerraformApplyStr)
+	if actual != expected {
+		t.Fatalf("bad: \n%s", actual)
+	}
 }
 
 func TestTerraformDiff(t *testing.T) {
@@ -456,6 +465,17 @@ func testTerraformProvider(tf *Terraform, n string) *terraformProvider {
 	return nil
 }
 
+const testTerraformApplyStr = `
+aws_instance.bar:
+  ID = foo
+  type = aws_instance
+  foo = bar
+aws_instance.foo:
+  ID = foo
+  type = aws_instance
+  num = 2
+`
+
 const testTerraformDiffStr = `
 UPDATE: aws_instance.bar
   foo:  "" => "2"

terraform/test-fixtures/apply-good/main.tf

@@ -3,5 +3,5 @@ resource "aws_instance" "foo" {
 }
 
 resource "aws_instance" "bar" {
-    foo = "${aws_instance.foo.num}"
+    foo = "bar"
 }