mirror of
https://github.com/vbatts/go-mtree.git
synced 2024-11-25 01:25:39 +00:00
e22043cb86
In certain circumstances (such as the manifest generation of a filesystem as an unprivileged user) it is important to provide hooks that override the default os.* implementation of filesystem-related functions. In order to avoid merging too much code from outside projects (such as umoci) this is implemented by providing FsEval hooks to Walk() and Check(). This allows for users of go-mtree to modify how filesystem checks are done, without compromising the simplicity of go-mtree's code. Signed-off-by: Aleksa Sarai <asarai@suse.de>
459 lines
11 KiB
Go
459 lines
11 KiB
Go
package mtree
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import (
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"archive/tar"
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"bytes"
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"encoding/json"
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"io"
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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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"time"
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)
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// simple walk of current directory, and imediately check it.
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// may not be parallelizable.
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func TestCompare(t *testing.T) {
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old, err := Walk(".", nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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new, err := Walk(".", nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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diffs, err := Compare(old, new, nil)
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if err != nil {
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t.Fatal(err)
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}
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if len(diffs) > 0 {
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t.Errorf("%#v", diffs)
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}
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}
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func TestCompareModified(t *testing.T) {
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dir, err := ioutil.TempDir("", "test-compare-modified")
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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(dir)
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// Create a bunch of objects.
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tmpfile := filepath.Join(dir, "tmpfile")
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if err := ioutil.WriteFile(tmpfile, []byte("some content here"), 0666); err != nil {
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t.Fatal(err)
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}
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tmpdir := filepath.Join(dir, "testdir")
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if err := os.Mkdir(tmpdir, 0755); err != nil {
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t.Fatal(err)
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}
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tmpsubfile := filepath.Join(tmpdir, "anotherfile")
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if err := ioutil.WriteFile(tmpsubfile, []byte("some different content"), 0666); err != nil {
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t.Fatal(err)
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}
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// Walk the current state.
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old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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// Overwrite the content in one of the files.
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if err := ioutil.WriteFile(tmpsubfile, []byte("modified content"), 0666); err != nil {
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t.Fatal(err)
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}
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// Walk the new state.
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new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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// Compare.
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diffs, err := Compare(old, new, nil)
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if err != nil {
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t.Fatal(err)
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}
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// 1 object
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if len(diffs) != 1 {
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t.Errorf("expected the diff length to be 1, got %d", len(diffs))
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for i, diff := range diffs {
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t.Logf("diff[%d] = %#v", i, diff)
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}
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}
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// These cannot fail.
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tmpfile, _ = filepath.Rel(dir, tmpfile)
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tmpdir, _ = filepath.Rel(dir, tmpdir)
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tmpsubfile, _ = filepath.Rel(dir, tmpsubfile)
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for _, diff := range diffs {
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switch diff.Path() {
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case tmpsubfile:
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if diff.Type() != Modified {
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t.Errorf("unexpected diff type for %s: %s", diff.Path(), diff.Type())
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}
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if diff.Diff() == nil {
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t.Errorf("expect to not get nil for .Diff()")
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}
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old := diff.Old()
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new := diff.New()
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if old == nil || new == nil {
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t.Errorf("expected to get (!nil, !nil) for (.Old, .New), got (%#v, %#v)", old, new)
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}
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default:
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t.Errorf("unexpected diff found: %#v", diff)
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}
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}
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}
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func TestCompareMissing(t *testing.T) {
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dir, err := ioutil.TempDir("", "test-compare-missing")
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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(dir)
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// Create a bunch of objects.
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tmpfile := filepath.Join(dir, "tmpfile")
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if err := ioutil.WriteFile(tmpfile, []byte("some content here"), 0666); err != nil {
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t.Fatal(err)
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}
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tmpdir := filepath.Join(dir, "testdir")
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if err := os.Mkdir(tmpdir, 0755); err != nil {
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t.Fatal(err)
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}
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tmpsubfile := filepath.Join(tmpdir, "anotherfile")
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if err := ioutil.WriteFile(tmpsubfile, []byte("some different content"), 0666); err != nil {
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t.Fatal(err)
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}
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// Walk the current state.
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old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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// Delete the objects.
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if err := os.RemoveAll(tmpfile); err != nil {
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t.Fatal(err)
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}
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if err := os.RemoveAll(tmpsubfile); err != nil {
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t.Fatal(err)
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}
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if err := os.RemoveAll(tmpdir); err != nil {
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t.Fatal(err)
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}
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// Walk the new state.
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new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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// Compare.
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diffs, err := Compare(old, new, nil)
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if err != nil {
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t.Fatal(err)
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}
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// 3 objects + the changes to '.'
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if len(diffs) != 4 {
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t.Errorf("expected the diff length to be 4, got %d", len(diffs))
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for i, diff := range diffs {
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t.Logf("diff[%d] = %#v", i, diff)
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}
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}
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// These cannot fail.
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tmpfile, _ = filepath.Rel(dir, tmpfile)
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tmpdir, _ = filepath.Rel(dir, tmpdir)
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tmpsubfile, _ = filepath.Rel(dir, tmpsubfile)
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for _, diff := range diffs {
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switch diff.Path() {
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case ".":
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// ignore these changes
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case tmpfile, tmpdir, tmpsubfile:
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if diff.Type() != Missing {
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t.Errorf("unexpected diff type for %s: %s", diff.Path(), diff.Type())
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}
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if diff.Diff() != nil {
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t.Errorf("expect to get nil for .Diff(), got %#v", diff.Diff())
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}
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old := diff.Old()
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new := diff.New()
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if old == nil || new != nil {
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t.Errorf("expected to get (!nil, nil) for (.Old, .New), got (%#v, %#v)", old, new)
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}
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default:
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t.Errorf("unexpected diff found: %#v", diff)
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}
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}
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}
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func TestCompareExtra(t *testing.T) {
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dir, err := ioutil.TempDir("", "test-compare-extra")
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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(dir)
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// Walk the current state.
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old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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// Create a bunch of objects.
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tmpfile := filepath.Join(dir, "tmpfile")
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if err := ioutil.WriteFile(tmpfile, []byte("some content here"), 0666); err != nil {
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t.Fatal(err)
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}
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tmpdir := filepath.Join(dir, "testdir")
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if err := os.Mkdir(tmpdir, 0755); err != nil {
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t.Fatal(err)
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}
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tmpsubfile := filepath.Join(tmpdir, "anotherfile")
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if err := ioutil.WriteFile(tmpsubfile, []byte("some different content"), 0666); err != nil {
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t.Fatal(err)
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}
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// Walk the new state.
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new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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// Compare.
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diffs, err := Compare(old, new, nil)
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if err != nil {
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t.Fatal(err)
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}
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// 3 objects + the changes to '.'
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if len(diffs) != 4 {
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t.Errorf("expected the diff length to be 4, got %d", len(diffs))
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for i, diff := range diffs {
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t.Logf("diff[%d] = %#v", i, diff)
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}
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}
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// These cannot fail.
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tmpfile, _ = filepath.Rel(dir, tmpfile)
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tmpdir, _ = filepath.Rel(dir, tmpdir)
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tmpsubfile, _ = filepath.Rel(dir, tmpsubfile)
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for _, diff := range diffs {
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switch diff.Path() {
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case ".":
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// ignore these changes
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case tmpfile, tmpdir, tmpsubfile:
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if diff.Type() != Extra {
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t.Errorf("unexpected diff type for %s: %s", diff.Path(), diff.Type())
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}
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if diff.Diff() != nil {
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t.Errorf("expect to get nil for .Diff(), got %#v", diff.Diff())
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}
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old := diff.Old()
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new := diff.New()
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if old != nil || new == nil {
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t.Errorf("expected to get (!nil, nil) for (.Old, .New), got (%#v, %#v)", old, new)
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}
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default:
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t.Errorf("unexpected diff found: %#v", diff)
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}
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}
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}
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func TestCompareKeys(t *testing.T) {
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dir, err := ioutil.TempDir("", "test-compare-keys")
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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(dir)
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// Create a bunch of objects.
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tmpfile := filepath.Join(dir, "tmpfile")
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if err := ioutil.WriteFile(tmpfile, []byte("some content here"), 0666); err != nil {
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t.Fatal(err)
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}
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tmpdir := filepath.Join(dir, "testdir")
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if err := os.Mkdir(tmpdir, 0755); err != nil {
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t.Fatal(err)
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}
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tmpsubfile := filepath.Join(tmpdir, "anotherfile")
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if err := ioutil.WriteFile(tmpsubfile, []byte("aaa"), 0666); err != nil {
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t.Fatal(err)
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}
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// Walk the current state.
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old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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// Overwrite the content in one of the files, but without changing the size.
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if err := ioutil.WriteFile(tmpsubfile, []byte("bbb"), 0666); err != nil {
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t.Fatal(err)
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}
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// Walk the new state.
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new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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// Compare.
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diffs, err := Compare(old, new, []Keyword{"size"})
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if err != nil {
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t.Fatal(err)
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}
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// 0 objects
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if len(diffs) != 0 {
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t.Errorf("expected the diff length to be 0, got %d", len(diffs))
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for i, diff := range diffs {
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t.Logf("diff[%d] = %#v", i, diff)
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}
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}
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}
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func TestTarCompare(t *testing.T) {
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dir, err := ioutil.TempDir("", "test-compare-tar")
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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(dir)
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// Create a bunch of objects.
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tmpfile := filepath.Join(dir, "tmpfile")
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if err := ioutil.WriteFile(tmpfile, []byte("some content"), 0644); err != nil {
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t.Fatal(err)
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}
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tmpdir := filepath.Join(dir, "testdir")
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if err := os.Mkdir(tmpdir, 0755); err != nil {
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t.Fatal(err)
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}
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tmpsubfile := filepath.Join(tmpdir, "anotherfile")
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if err := ioutil.WriteFile(tmpsubfile, []byte("aaa"), 0644); err != nil {
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t.Fatal(err)
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}
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// Create a tar-like archive.
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compareFiles := []fakeFile{
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{"./", "", 0700, tar.TypeDir, 100, 0, nil},
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{"tmpfile", "some content", 0644, tar.TypeReg, 100, 0, nil},
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{"testdir/", "", 0755, tar.TypeDir, 100, 0, nil},
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{"testdir/anotherfile", "aaa", 0644, tar.TypeReg, 100, 0, nil},
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}
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for _, file := range compareFiles {
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path := filepath.Join(dir, file.Name)
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// Change the time to something known with nanosec != 0.
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chtime := time.Unix(file.Sec, 987654321)
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if err := os.Chtimes(path, chtime, chtime); err != nil {
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t.Fatal(err)
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}
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}
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// Walk the current state.
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old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
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if err != nil {
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t.Fatal(err)
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}
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ts, err := makeTarStream(compareFiles)
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if err != nil {
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t.Fatal(err)
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}
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str := NewTarStreamer(bytes.NewBuffer(ts), nil, append(DefaultTarKeywords, "sha1"))
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if _, err = io.Copy(ioutil.Discard, str); err != nil && err != io.EOF {
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t.Fatal(err)
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}
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if err = str.Close(); err != nil {
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t.Fatal(err)
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}
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new, err := str.Hierarchy()
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if err != nil {
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t.Fatal(err)
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}
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// Compare.
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diffs, err := Compare(old, new, append(DefaultTarKeywords, "sha1"))
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if err != nil {
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t.Fatal(err)
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}
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// 0 objects
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if len(diffs) != 0 {
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actualFailure := false
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for i, delta := range diffs {
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// XXX: Tar generation is slightly broken, so we need to ignore some bugs.
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if delta.Path() == "." && delta.Type() == Modified {
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// FIXME: This is a known bug.
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t.Logf("'.' is different in the tar -- this is a bug in the tar generation")
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// The tar generation bug means that '.' is missing a bunch of keys.
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allMissing := true
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for _, keyDelta := range delta.Diff() {
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if keyDelta.Type() != Missing {
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allMissing = false
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}
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}
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if !allMissing {
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t.Errorf("'.' has changed in a way not consistent with known bugs")
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}
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continue
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}
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// XXX: Another bug.
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keys := delta.Diff()
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if len(keys) == 1 && keys[0].Name() == "size" && keys[0].Type() == Missing {
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// FIXME: Also a known bug with tar generation dropping size=.
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t.Logf("'%s' is missing a size= keyword -- a bug in tar generation", delta.Path())
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continue
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}
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actualFailure = true
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buf, err := json.MarshalIndent(delta, "", " ")
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if err == nil {
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t.Logf("FAILURE: diff[%d] = %s", i, string(buf))
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} else {
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t.Logf("FAILURE: diff[%d] = %#v", i, delta)
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}
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}
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if actualFailure {
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t.Errorf("expected the diff length to be 0, got %d", len(diffs))
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}
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}
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}
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