1// +build !windows
2
3package layer
4
5import "testing"
6
7func graphDiffSize(ls Store, l Layer) (int64, error) {
8	cl := getCachedLayer(l)
9	var parent string
10	if cl.parent != nil {
11		parent = cl.parent.cacheID
12	}
13	return ls.(*layerStore).driver.DiffSize(cl.cacheID, parent)
14}
15
16// Unix as Windows graph driver does not support Changes which is indirectly
17// invoked by calling DiffSize on the driver
18func TestLayerSize(t *testing.T) {
19	ls, _, cleanup := newTestStore(t)
20	defer cleanup()
21
22	content1 := []byte("Base contents")
23	content2 := []byte("Added contents")
24
25	layer1, err := createLayer(ls, "", initWithFiles(newTestFile("file1", content1, 0644)))
26	if err != nil {
27		t.Fatal(err)
28	}
29
30	layer2, err := createLayer(ls, layer1.ChainID(), initWithFiles(newTestFile("file2", content2, 0644)))
31	if err != nil {
32		t.Fatal(err)
33	}
34
35	layer1DiffSize, err := graphDiffSize(ls, layer1)
36	if err != nil {
37		t.Fatal(err)
38	}
39
40	if int(layer1DiffSize) != len(content1) {
41		t.Fatalf("Unexpected diff size %d, expected %d", layer1DiffSize, len(content1))
42	}
43
44	layer1Size, err := layer1.Size()
45	if err != nil {
46		t.Fatal(err)
47	}
48
49	if expected := len(content1); int(layer1Size) != expected {
50		t.Fatalf("Unexpected size %d, expected %d", layer1Size, expected)
51	}
52
53	layer2DiffSize, err := graphDiffSize(ls, layer2)
54	if err != nil {
55		t.Fatal(err)
56	}
57
58	if int(layer2DiffSize) != len(content2) {
59		t.Fatalf("Unexpected diff size %d, expected %d", layer2DiffSize, len(content2))
60	}
61
62	layer2Size, err := layer2.Size()
63	if err != nil {
64		t.Fatal(err)
65	}
66
67	if expected := len(content1) + len(content2); int(layer2Size) != expected {
68		t.Fatalf("Unexpected size %d, expected %d", layer2Size, expected)
69	}
70
71}
72