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package filesystem
import (
"bytes"
"io"
"os"
"testing"
. "gopkg.in/check.v1"
"gopkg.in/src-d/go-billy.v2"
"gopkg.in/src-d/go-billy.v2/memfs"
"gopkg.in/src-d/go-git.v4/utils/merkletrie"
"gopkg.in/src-d/go-git.v4/utils/merkletrie/noder"
)
func Test(t *testing.T) { TestingT(t) }
type NoderSuite struct{}
var _ = Suite(&NoderSuite{})
func (s *NoderSuite) TestDiff(c *C) {
fsA := memfs.New()
WriteFile(fsA, "foo", []byte("foo"), 0644)
WriteFile(fsA, "qux/bar", []byte("foo"), 0644)
WriteFile(fsA, "qux/qux", []byte("foo"), 0644)
fsB := memfs.New()
WriteFile(fsB, "foo", []byte("foo"), 0644)
WriteFile(fsB, "qux/bar", []byte("foo"), 0644)
WriteFile(fsB, "qux/qux", []byte("foo"), 0644)
ch, err := merkletrie.DiffTree(NewRootNode(fsA), NewRootNode(fsB), IsEquals)
c.Assert(err, IsNil)
c.Assert(ch, HasLen, 0)
}
func (s *NoderSuite) TestDiffChangeContent(c *C) {
fsA := memfs.New()
WriteFile(fsA, "foo", []byte("foo"), 0644)
WriteFile(fsA, "qux/bar", []byte("foo"), 0644)
WriteFile(fsA, "qux/qux", []byte("foo"), 0644)
fsB := memfs.New()
WriteFile(fsB, "foo", []byte("foo"), 0644)
WriteFile(fsB, "qux/bar", []byte("bar"), 0644)
WriteFile(fsB, "qux/qux", []byte("foo"), 0644)
ch, err := merkletrie.DiffTree(NewRootNode(fsA), NewRootNode(fsB), IsEquals)
c.Assert(err, IsNil)
c.Assert(ch, HasLen, 1)
}
func (s *NoderSuite) TestDiffChangeMissing(c *C) {
fsA := memfs.New()
WriteFile(fsA, "foo", []byte("foo"), 0644)
fsB := memfs.New()
WriteFile(fsB, "bar", []byte("bar"), 0644)
ch, err := merkletrie.DiffTree(NewRootNode(fsA), NewRootNode(fsB), IsEquals)
c.Assert(err, IsNil)
c.Assert(ch, HasLen, 2)
}
func (s *NoderSuite) TestDiffChangeMode(c *C) {
fsA := memfs.New()
WriteFile(fsA, "foo", []byte("foo"), 0644)
fsB := memfs.New()
WriteFile(fsB, "foo", []byte("foo"), 0755)
ch, err := merkletrie.DiffTree(NewRootNode(fsA), NewRootNode(fsB), IsEquals)
c.Assert(err, IsNil)
c.Assert(ch, HasLen, 1)
}
func (s *NoderSuite) TestDiffChangeModeNotRelevant(c *C) {
fsA := memfs.New()
WriteFile(fsA, "foo", []byte("foo"), 0644)
fsB := memfs.New()
WriteFile(fsB, "foo", []byte("foo"), 0655)
ch, err := merkletrie.DiffTree(NewRootNode(fsA), NewRootNode(fsB), IsEquals)
c.Assert(err, IsNil)
c.Assert(ch, HasLen, 0)
}
func WriteFile(fs billy.Filesystem, filename string, data []byte, perm os.FileMode) error {
f, err := fs.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
if err != nil {
return err
}
n, err := f.Write(data)
if err == nil && n < len(data) {
err = io.ErrShortWrite
}
if err1 := f.Close(); err == nil {
err = err1
}
return err
}
var empty = make([]byte, 24)
func IsEquals(a, b noder.Hasher) bool {
if bytes.Equal(a.Hash(), empty) || bytes.Equal(b.Hash(), empty) {
return false
}
return bytes.Equal(a.Hash(), b.Hash())
}
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