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tags_unit_test.go
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package graph
import (
"bytes"
"github.com/dotcloud/docker/daemon/graphdriver"
_ "github.com/dotcloud/docker/daemon/graphdriver/vfs" // import the vfs driver so it is used in the tests
"github.com/dotcloud/docker/image"
"github.com/dotcloud/docker/utils"
"github.com/dotcloud/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar"
"io"
"os"
"path"
"testing"
)
const (
testImageName = "myapp"
testImageID = "foo"
)
func fakeTar() (io.Reader, error) {
content := []byte("Hello world!\n")
buf := new(bytes.Buffer)
tw := tar.NewWriter(buf)
for _, name := range []string{"/etc/postgres/postgres.conf", "/etc/passwd", "/var/log/postgres/postgres.conf"} {
hdr := new(tar.Header)
hdr.Size = int64(len(content))
hdr.Name = name
if err := tw.WriteHeader(hdr); err != nil {
return nil, err
}
tw.Write([]byte(content))
}
tw.Close()
return buf, nil
}
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.Image{ID: testImageID}
// FIXME: this fails on Darwin with:
// tags_unit_test.go:36: mkdir /var/folders/7g/b3ydb5gx4t94ndr_cljffbt80000gq/T/docker-test569b-tRunner-075013689/vfs/dir/foo/etc/postgres: permission denied
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")
}
}