Add more overlay tests and benchmarks

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

daemon/graphdriver/overlay/overlay.go

@@ -15,7 +15,6 @@ import (
 
 	"github.com/docker/docker/daemon/graphdriver"
 	"github.com/docker/docker/pkg/archive"
-	"github.com/docker/docker/pkg/chrootarchive"
 	"github.com/docker/docker/pkg/idtools"
 
 	"github.com/docker/docker/pkg/mount"
@@ -426,7 +425,7 @@ func (d *Driver) ApplyDiff(id string, parent string, diff archive.Reader) (size
 	}
 
 	options := &archive.TarOptions{UIDMaps: d.uidMaps, GIDMaps: d.gidMaps}
-	if size, err = chrootarchive.ApplyUncompressedLayer(tmpRootDir, diff, options); err != nil {
+	if size, err = graphdriver.ApplyUncompressedLayer(tmpRootDir, diff, options); err != nil {
 		return 0, err
 	}
 

daemon/graphdriver/overlay/overlay_test.go

@@ -5,9 +5,17 @@ package overlay
 import (
 	"testing"
 
+	"github.com/docker/docker/daemon/graphdriver"
 	"github.com/docker/docker/daemon/graphdriver/graphtest"
+	"github.com/docker/docker/pkg/archive"
 )
 
+func init() {
+	// Do not sure chroot to speed run time and allow archive
+	// errors or hangs to be debugged directly from the test process.
+	graphdriver.ApplyUncompressedLayer = archive.ApplyUncompressedLayer
+}
+
 // This avoids creating a new driver for each test if all tests are run
 // Make sure to put new tests between TestOverlaySetup and TestOverlayTeardown
 func TestOverlaySetup(t *testing.T) {
@@ -26,6 +34,56 @@ func TestOverlayCreateSnap(t *testing.T) {
 	graphtest.DriverTestCreateSnap(t, "overlay")
 }
 
+func TestOverlay50LayerRead(t *testing.T) {
+	graphtest.DriverTestDeepLayerRead(t, 50, "overlay")
+}
+
+func TestOverlayDiffApply10Files(t *testing.T) {
+	graphtest.DriverTestDiffApply(t, 10, "overlay")
+}
+
+func TestOverlayChanges(t *testing.T) {
+	graphtest.DriverTestChanges(t, "overlay")
+}
+
 func TestOverlayTeardown(t *testing.T) {
 	graphtest.PutDriver(t)
 }
+
+// Benchmarks should always setup new driver
+
+func BenchmarkExists(b *testing.B) {
+	graphtest.DriverBenchExists(b, "overlay")
+}
+
+func BenchmarkGetEmpty(b *testing.B) {
+	graphtest.DriverBenchGetEmpty(b, "overlay")
+}
+
+func BenchmarkDiffBase(b *testing.B) {
+	graphtest.DriverBenchDiffBase(b, "overlay")
+}
+
+func BenchmarkDiffSmallUpper(b *testing.B) {
+	graphtest.DriverBenchDiffN(b, 10, 10, "overlay")
+}
+
+func BenchmarkDiff10KFileUpper(b *testing.B) {
+	graphtest.DriverBenchDiffN(b, 10, 10000, "overlay")
+}
+
+func BenchmarkDiff10KFilesBottom(b *testing.B) {
+	graphtest.DriverBenchDiffN(b, 10000, 10, "overlay")
+}
+
+func BenchmarkDiffApply100(b *testing.B) {
+	graphtest.DriverBenchDiffApplyN(b, 100, "overlay")
+}
+
+func BenchmarkDiff20Layers(b *testing.B) {
+	graphtest.DriverBenchDeepLayerDiff(b, 20, "overlay")
+}
+
+func BenchmarkRead20Layers(b *testing.B) {
+	graphtest.DriverBenchDeepLayerRead(b, 20, "overlay")
+}