repository_project: fix import and add test

github/resource_github_repository_project.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"strconv"
+	"strings"
 
 	"github.com/google/go-github/github"
 	"github.com/hashicorp/terraform/helper/schema"
@@ -16,7 +17,15 @@ func resourceGithubRepositoryProject() *schema.Resource {
 		Update: resourceGithubRepositoryProjectUpdate,
 		Delete: resourceGithubRepositoryProjectDelete,
 		Importer: &schema.ResourceImporter{
-			State: schema.ImportStatePassthrough,
+			State: func(d *schema.ResourceData, meta interface{}) ([]*schema.ResourceData, error) {
+				parts := strings.Split(d.Id(), "/")
+				if len(parts) != 2 {
+					return nil, fmt.Errorf("Invalid ID specified. Supplied ID must be written as <repository>/<project_id>")
+				}
+				d.Set("repository", parts[0])
+				d.SetId(parts[1])
+				return []*schema.ResourceData{d}, nil
+			},
 		},
 
 		Schema: map[string]*schema.Schema{

github/resource_github_repository_project_test.go

@@ -38,6 +38,27 @@ func TestAccGithubRepositoryProject_basic(t *testing.T) {
 	})
 }
 
+func TestAccGithubRepositoryProject_importBasic(t *testing.T) {
+	randRepoName := acctest.RandStringFromCharSet(10, acctest.CharSetAlphaNum)
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccGithubRepositoryProjectDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccGithubRepositoryProjectConfig(randRepoName),
+			},
+			{
+				ResourceName:        "github_repository_project.test",
+				ImportState:         true,
+				ImportStateVerify:   true,
+				ImportStateIdPrefix: randRepoName + `/`,
+			},
+		},
+	})
+}
+
 func testAccGithubRepositoryProjectDestroy(s *terraform.State) error {
 	conn := testAccProvider.Meta().(*Organization).client