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package commitgraph_test
import (
"io/ioutil"
"os"
"path"
"testing"
"golang.org/x/exp/mmap"
. "gopkg.in/check.v1"
"gopkg.in/src-d/go-git-fixtures.v3"
"gopkg.in/src-d/go-git.v4/plumbing"
"gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph"
)
func Test(t *testing.T) { TestingT(t) }
type CommitgraphSuite struct {
fixtures.Suite
}
var _ = Suite(&CommitgraphSuite{})
func testDecodeHelper(c *C, path string) {
reader, err := mmap.Open(path)
c.Assert(err, IsNil)
defer reader.Close()
index, err := commitgraph.OpenFileIndex(reader)
c.Assert(err, IsNil)
// Root commit
nodeIndex, err := index.GetIndexByHash(plumbing.NewHash("347c91919944a68e9413581a1bc15519550a3afe"))
c.Assert(err, IsNil)
node, err := index.GetNodeByIndex(nodeIndex)
c.Assert(err, IsNil)
c.Assert(len(node.ParentIndexes), Equals, 0)
c.Assert(len(node.ParentHashes), Equals, 0)
// Regular commit
nodeIndex, err = index.GetIndexByHash(plumbing.NewHash("e713b52d7e13807e87a002e812041f248db3f643"))
c.Assert(err, IsNil)
node, err = index.GetNodeByIndex(nodeIndex)
c.Assert(err, IsNil)
c.Assert(len(node.ParentIndexes), Equals, 1)
c.Assert(len(node.ParentHashes), Equals, 1)
c.Assert(node.ParentHashes[0].String(), Equals, "347c91919944a68e9413581a1bc15519550a3afe")
// Merge commit
nodeIndex, err = index.GetIndexByHash(plumbing.NewHash("b29328491a0682c259bcce28741eac71f3499f7d"))
c.Assert(err, IsNil)
node, err = index.GetNodeByIndex(nodeIndex)
c.Assert(err, IsNil)
c.Assert(len(node.ParentIndexes), Equals, 2)
c.Assert(len(node.ParentHashes), Equals, 2)
c.Assert(node.ParentHashes[0].String(), Equals, "e713b52d7e13807e87a002e812041f248db3f643")
c.Assert(node.ParentHashes[1].String(), Equals, "03d2c021ff68954cf3ef0a36825e194a4b98f981")
// Octopus merge commit
nodeIndex, err = index.GetIndexByHash(plumbing.NewHash("6f6c5d2be7852c782be1dd13e36496dd7ad39560"))
c.Assert(err, IsNil)
node, err = index.GetNodeByIndex(nodeIndex)
c.Assert(err, IsNil)
c.Assert(len(node.ParentIndexes), Equals, 3)
c.Assert(len(node.ParentHashes), Equals, 3)
c.Assert(node.ParentHashes[0].String(), Equals, "ce275064ad67d51e99f026084e20827901a8361c")
c.Assert(node.ParentHashes[1].String(), Equals, "bb13916df33ed23004c3ce9ed3b8487528e655c1")
c.Assert(node.ParentHashes[2].String(), Equals, "a45273fe2d63300e1962a9e26a6b15c276cd7082")
// Check all hashes
hashes := index.Hashes()
c.Assert(len(hashes), Equals, 11)
c.Assert(hashes[0].String(), Equals, "03d2c021ff68954cf3ef0a36825e194a4b98f981")
c.Assert(hashes[10].String(), Equals, "e713b52d7e13807e87a002e812041f248db3f643")
}
func (s *CommitgraphSuite) TestDecode(c *C) {
fixtures.ByTag("commit-graph").Test(c, func(f *fixtures.Fixture) {
dotgit := f.DotGit()
testDecodeHelper(c, path.Join(dotgit.Root(), "objects", "info", "commit-graph"))
})
}
func (s *CommitgraphSuite) TestReencode(c *C) {
fixtures.ByTag("commit-graph").Test(c, func(f *fixtures.Fixture) {
dotgit := f.DotGit()
reader, err := mmap.Open(path.Join(dotgit.Root(), "objects", "info", "commit-graph"))
c.Assert(err, IsNil)
defer reader.Close()
index, err := commitgraph.OpenFileIndex(reader)
c.Assert(err, IsNil)
writer, err := ioutil.TempFile(dotgit.Root(), "commit-graph")
c.Assert(err, IsNil)
tmpName := writer.Name()
defer os.Remove(tmpName)
encoder := commitgraph.NewEncoder(writer)
err = encoder.Encode(index)
c.Assert(err, IsNil)
writer.Close()
testDecodeHelper(c, tmpName)
})
}
func (s *CommitgraphSuite) TestReencodeInMemory(c *C) {
fixtures.ByTag("commit-graph").Test(c, func(f *fixtures.Fixture) {
dotgit := f.DotGit()
reader, err := mmap.Open(path.Join(dotgit.Root(), "objects", "info", "commit-graph"))
c.Assert(err, IsNil)
index, err := commitgraph.OpenFileIndex(reader)
c.Assert(err, IsNil)
memoryIndex := commitgraph.NewMemoryIndex()
for i, hash := range index.Hashes() {
node, err := index.GetNodeByIndex(i)
c.Assert(err, IsNil)
err = memoryIndex.Add(hash, node)
c.Assert(err, IsNil)
}
reader.Close()
writer, err := ioutil.TempFile(dotgit.Root(), "commit-graph")
c.Assert(err, IsNil)
tmpName := writer.Name()
defer os.Remove(tmpName)
encoder := commitgraph.NewEncoder(writer)
err = encoder.Encode(memoryIndex)
c.Assert(err, IsNil)
writer.Close()
testDecodeHelper(c, tmpName)
})
}
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