package docker
 
 import (

 	"github.com/dotcloud/docker/graphdriver"

 	"github.com/dotcloud/docker/utils"
 	"os"

 	"path"
 	"testing"

 )
 
 const (

 	testImageName = "myapp"
 	testImageID   = "foo"

 )
 
 func mkTestTagStore(root string, t *testing.T) *TagStore {

 	driver, err := graphdriver.New(root)
 	if err != nil {
 		t.Fatal(err)
 	}
 	graph, err := NewGraph(root, driver)

 	if err != nil {
 		t.Fatal(err)
 	}
 	store, err := NewTagStore(path.Join(root, "tags"), graph)
 	if err != nil {
 		t.Fatal(err)
 	}
 	archive, err := fakeTar()
 	if err != nil {
 		t.Fatal(err)
 	}
 	img := &Image{ID: testImageID}
 	if err := graph.Register(nil, archive, img); err != nil {
 		t.Fatal(err)
 	}
 	if err := store.Set(testImageName, "", testImageID, false); err != nil {
 		t.Fatal(err)
 	}
 	return store
 }
 
 func TestLookupImage(t *testing.T) {
 	tmp, err := utils.TestDirectory("")
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer os.RemoveAll(tmp)
 	store := mkTestTagStore(tmp, t)

 	defer store.graph.driver.Cleanup()

 
 	if img, err := store.LookupImage(testImageName); err != nil {
 		t.Fatal(err)
 	} else if img == nil {
 		t.Errorf("Expected 1 image, none found")
 	}
 	if img, err := store.LookupImage(testImageName + ":" + DEFAULTTAG); err != nil {
 		t.Fatal(err)
 	} else if img == nil {
 		t.Errorf("Expected 1 image, none found")
 	}
 
 	if img, err := store.LookupImage(testImageName + ":" + "fail"); err == nil {
 		t.Errorf("Expected error, none found")
 	} else if img != nil {
 		t.Errorf("Expected 0 image, 1 found")
 	}
 
 	if img, err := store.LookupImage("fail:fail"); err == nil {
 		t.Errorf("Expected error, none found")
 	} else if img != nil {
 		t.Errorf("Expected 0 image, 1 found")
 	}
 
 	if img, err := store.LookupImage(testImageID); err != nil {
 		t.Fatal(err)
 	} else if img == nil {
 		t.Errorf("Expected 1 image, none found")
 	}
 
 	if img, err := store.LookupImage(testImageName + ":" + testImageID); err != nil {
 		t.Fatal(err)
 	} else if img == nil {
 		t.Errorf("Expected 1 image, none found")
 	}
 }