92 lines
2 KiB
Go
92 lines
2 KiB
Go
package naive
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"testing"
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"github.com/docker/containerd"
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"github.com/docker/containerd/snapshot/testutil"
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)
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func TestSnapshotNaiveBasic(t *testing.T) {
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testutil.RequiresRoot(t)
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tmpDir, err := ioutil.TempDir("", "test-naive-")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(tmpDir)
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t.Log(tmpDir)
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root := filepath.Join(tmpDir, "root")
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n, err := NewNaive(root)
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if err != nil {
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t.Fatal(err)
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}
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preparing := filepath.Join(tmpDir, "preparing")
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if err := os.MkdirAll(preparing, 0777); err != nil {
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t.Fatal(err)
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}
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mounts, err := n.Prepare(preparing, "")
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if err != nil {
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t.Fatal(err)
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}
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if err := containerd.MountAll(mounts, preparing); err != nil {
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t.Fatal(err)
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}
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if err := ioutil.WriteFile(filepath.Join(preparing, "foo"), []byte("foo\n"), 0777); err != nil {
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t.Fatal(err)
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}
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os.MkdirAll(preparing+"/a/b/c", 0755)
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// defer os.Remove(filepath.Join(tmpDir, "foo"))
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committed := filepath.Join(n.root, "committed")
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if err := n.Commit(committed, preparing); err != nil {
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t.Fatal(err)
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}
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if n.Parent(preparing) != "" {
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t.Fatalf("parent of new layer should be empty, got n.Parent(%q) == %q", preparing, n.Parent(preparing))
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}
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next := filepath.Join(tmpDir, "nextlayer")
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if err := os.MkdirAll(next, 0777); err != nil {
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t.Fatal(err)
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}
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mounts, err = n.Prepare(next, committed)
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if err != nil {
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t.Fatal(err)
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}
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if err := containerd.MountAll(mounts, next); err != nil {
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t.Fatal(err)
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}
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if err := ioutil.WriteFile(filepath.Join(next, "bar"), []byte("bar\n"), 0777); err != nil {
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t.Fatal(err)
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}
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// also, change content of foo to bar
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if err := ioutil.WriteFile(filepath.Join(next, "foo"), []byte("bar\n"), 0777); err != nil {
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t.Fatal(err)
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}
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os.RemoveAll(next + "/a/b")
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nextCommitted := filepath.Join(n.root, "committed-next")
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if err := n.Commit(nextCommitted, next); err != nil {
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t.Fatal(err)
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}
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if n.Parent(nextCommitted) != committed {
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t.Fatalf("parent of new layer should be %q, got n.Parent(%q) == %q (%#v)", committed, next, n.Parent(next), n.parents)
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}
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}
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