providers/heroku: plans work without specific plan name [GH-198]

CHANGELOG.md

@@ -61,6 +61,8 @@ BUG FIXES:
   * providers/heroku: Domains and drains are deleted before the app.
   * providers/heroku: Moved from the client library bgentry/heroku-go to
       cyberdelia/heroku-go [GH-239].
+  * providers/heroku: Plans without a specific plan name for
+      heroku\_addon work. [GH-198]
 
 PLUGIN CHANGES:
 

builtin/providers/heroku/resource_heroku_addon.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"log"
 	"sync"
+	"strings"
 
 	"github.com/cyberdelia/heroku-go/v3"
 	"github.com/hashicorp/terraform/helper/schema"
@@ -98,8 +99,21 @@ func resourceHerokuAddonRead(d *schema.ResourceData, meta interface{}) error {
 		return err
 	}
 
+	// Determine the plan. If we were configured without a specific plan,
+	// then just avoid the plan altogether (accepting anything that
+	// Heroku sends down).
+	plan := addon.Plan.Name
+	if v := d.Get("plan").(string); v != "" {
+		if idx := strings.IndexRune(v, ':'); idx == -1 {
+			idx = strings.IndexRune(plan, ':')
+			if idx > -1 {
+				plan = plan[:idx]
+			}
+		}
+	}
+
 	d.Set("name", addon.Name)
-	d.Set("plan", addon.Plan.Name)
+	d.Set("plan", plan)
 	d.Set("provider_id", addon.ProviderID)
 	d.Set("config_vars", []interface{}{addon.ConfigVars})
 	d.SetDependencies([]terraform.ResourceDependency{

builtin/providers/heroku/resource_heroku_addon_test.go

@@ -21,7 +21,7 @@ func TestAccHerokuAddon_Basic(t *testing.T) {
 				Config: testAccCheckHerokuAddonConfig_basic,
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckHerokuAddonExists("heroku_addon.foobar", &addon),
-					testAccCheckHerokuAddonAttributes(&addon),
+					testAccCheckHerokuAddonAttributes(&addon, "deployhooks:http"),
 					resource.TestCheckResourceAttr(
 						"heroku_addon.foobar", "config.0.url", "http://google.com"),
 					resource.TestCheckResourceAttr(
@@ -34,6 +34,41 @@ func TestAccHerokuAddon_Basic(t *testing.T) {
 	})
 }
 
+// GH-198
+func TestAccHerokuAddon_noPlan(t *testing.T) {
+	var addon heroku.Addon
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckHerokuAddonDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testAccCheckHerokuAddonConfig_no_plan,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckHerokuAddonExists("heroku_addon.foobar", &addon),
+					testAccCheckHerokuAddonAttributes(&addon, "memcachier:dev"),
+					resource.TestCheckResourceAttr(
+						"heroku_addon.foobar", "app", "terraform-test-app"),
+					resource.TestCheckResourceAttr(
+						"heroku_addon.foobar", "plan", "memcachier"),
+				),
+			},
+			resource.TestStep{
+				Config: testAccCheckHerokuAddonConfig_no_plan,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckHerokuAddonExists("heroku_addon.foobar", &addon),
+					testAccCheckHerokuAddonAttributes(&addon, "memcachier:dev"),
+					resource.TestCheckResourceAttr(
+						"heroku_addon.foobar", "app", "terraform-test-app"),
+					resource.TestCheckResourceAttr(
+						"heroku_addon.foobar", "plan", "memcachier"),
+				),
+			},
+		},
+	})
+}
+
 func testAccCheckHerokuAddonDestroy(s *terraform.State) error {
 	client := testAccProvider.Meta().(*heroku.Service)
 
@@ -52,11 +87,11 @@ func testAccCheckHerokuAddonDestroy(s *terraform.State) error {
 	return nil
 }
 
-func testAccCheckHerokuAddonAttributes(addon *heroku.Addon) resource.TestCheckFunc {
+func testAccCheckHerokuAddonAttributes(addon *heroku.Addon, n string) resource.TestCheckFunc {
 	return func(s *terraform.State) error {
 
-		if addon.Plan.Name != "deployhooks:http" {
-			return fmt.Errorf("Bad plan: %s", addon.Plan)
+		if addon.Plan.Name != n {
+			return fmt.Errorf("Bad plan: %s", addon.Plan.Name)
 		}
 
 		return nil
@@ -106,3 +141,14 @@ resource "heroku_addon" "foobar" {
         url = "http://google.com"
     }
 }`
+
+const testAccCheckHerokuAddonConfig_no_plan = `
+resource "heroku_app" "foobar" {
+    name = "terraform-test-app"
+    region = "us"
+}
+
+resource "heroku_addon" "foobar" {
+    app = "${heroku_app.foobar.name}"
+    plan = "memcachier"
+}`