Merge pull request #10308 from cpuguy83/add_volume_unit_tests

Adds unit tests for volumes

volumes/repository.go

@@ -125,12 +125,6 @@ func (r *Repository) get(path string) *Volume {
 	return r.volumes[filepath.Clean(path)]
 }
 
-func (r *Repository) Add(volume *Volume) error {
-	r.lock.Lock()
-	defer r.lock.Unlock()
-	return r.add(volume)
-}
-
 func (r *Repository) add(volume *Volume) error {
 	if vol := r.get(volume.Path); vol != nil {
 		return fmt.Errorf("Volume exists: %s", volume.ID)
@@ -139,16 +133,6 @@ func (r *Repository) add(volume *Volume) error {
 	return nil
 }
 
-func (r *Repository) Remove(volume *Volume) {
-	r.lock.Lock()
-	r.remove(volume)
-	r.lock.Unlock()
-}
-
-func (r *Repository) remove(volume *Volume) {
-	delete(r.volumes, volume.Path)
-}
-
 func (r *Repository) Delete(path string) error {
 	r.lock.Lock()
 	defer r.lock.Unlock()
@@ -178,7 +162,7 @@ func (r *Repository) Delete(path string) error {
 		}
 	}
 
-	r.remove(volume)
+	delete(r.volumes, volume.Path)
 	return nil
 }
 

volumes/repository_test.go

@@ -0,0 +1,164 @@
+package volumes
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/docker/docker/daemon/graphdriver"
+	_ "github.com/docker/docker/daemon/graphdriver/vfs"
+)
+
+func TestRepositoryFindOrCreate(t *testing.T) {
+	root, err := ioutil.TempDir(os.TempDir(), "volumes")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(root)
+	repo, err := newRepo(root)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// no path
+	v, err := repo.FindOrCreateVolume("", true)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// FIXME: volumes are heavily dependent on the vfs driver, but this should not be so!
+	expected := filepath.Join(root, "repo-graph", "vfs", "dir", v.ID)
+	if v.Path != expected {
+		t.Fatalf("expected new path to be created in %s, got %s", expected, v.Path)
+	}
+
+	// with a non-existant path
+	dir := filepath.Join(root, "doesntexist")
+	v, err = repo.FindOrCreateVolume(dir, true)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if v.Path != dir {
+		t.Fatalf("expected new path to be created in %s, got %s", dir, v.Path)
+	}
+
+	if _, err := os.Stat(v.Path); err != nil {
+		t.Fatal(err)
+	}
+
+	// with a pre-existing path
+	// can just use the same path from above since it now exists
+	v, err = repo.FindOrCreateVolume(dir, true)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if v.Path != dir {
+		t.Fatalf("expected new path to be created in %s, got %s", dir, v.Path)
+	}
+
+}
+
+func TestRepositoryGet(t *testing.T) {
+	root, err := ioutil.TempDir(os.TempDir(), "volumes")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(root)
+	repo, err := newRepo(root)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	v, err := repo.FindOrCreateVolume("", true)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	v2 := repo.Get(v.Path)
+	if v2 == nil {
+		t.Fatalf("expected to find volume but didn't")
+	}
+	if v2 != v {
+		t.Fatalf("expected get to return same volume")
+	}
+}
+
+func TestRepositoryDelete(t *testing.T) {
+	root, err := ioutil.TempDir(os.TempDir(), "volumes")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(root)
+	repo, err := newRepo(root)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// with a normal volume
+	v, err := repo.FindOrCreateVolume("", true)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if err := repo.Delete(v.Path); err != nil {
+		t.Fatal(err)
+	}
+
+	if v := repo.Get(v.Path); v != nil {
+		t.Fatalf("expected volume to not exist")
+	}
+
+	if _, err := os.Stat(v.Path); err == nil {
+		t.Fatalf("expected volume files to be removed")
+	}
+
+	// with a bind mount
+	dir := filepath.Join(root, "test")
+	v, err = repo.FindOrCreateVolume(dir, true)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if err := repo.Delete(v.Path); err != nil {
+		t.Fatal(err)
+	}
+
+	if v := repo.Get(v.Path); v != nil {
+		t.Fatalf("expected volume to not exist")
+	}
+
+	if _, err := os.Stat(v.Path); err != nil && os.IsNotExist(err) {
+		t.Fatalf("expected bind volume data to persist after destroying volume")
+	}
+
+	// with container refs
+	dir = filepath.Join(root, "test")
+	v, err = repo.FindOrCreateVolume(dir, true)
+	if err != nil {
+		t.Fatal(err)
+	}
+	v.AddContainer("1234")
+
+	if err := repo.Delete(v.Path); err == nil {
+		t.Fatalf("expected volume delete to fail due to container refs")
+	}
+
+	v.RemoveContainer("1234")
+	if err := repo.Delete(v.Path); err != nil {
+		t.Fatal(err)
+	}
+
+}
+
+func newRepo(root string) (*Repository, error) {
+	configPath := filepath.Join(root, "repo-config")
+	graphDir := filepath.Join(root, "repo-graph")
+
+	driver, err := graphdriver.GetDriver("vfs", graphDir, []string{})
+	if err != nil {
+		return nil, err
+	}
+	return NewRepository(configPath, driver)
+}

volumes/volume_test.go

@@ -0,0 +1,19 @@
+package volumes
+
+import "testing"
+
+func TestContainers(t *testing.T) {
+	v := &Volume{containers: make(map[string]struct{})}
+	id := "1234"
+
+	v.AddContainer(id)
+
+	if v.Containers()[0] != id {
+		t.Fatalf("adding a container ref failed")
+	}
+
+	v.RemoveContainer(id)
+	if len(v.Containers()) != 0 {
+		t.Fatalf("removing container failed")
+	}
+}