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applier_test.go
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applier_test.go
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package patch2pr
import (
"bytes"
"context"
"encoding/base64"
"fmt"
"io/fs"
"os"
"path/filepath"
"strconv"
"strings"
"testing"
"time"
"github.com/bluekeyes/go-gitdiff/gitdiff"
"github.com/bluekeyes/patch2pr/internal"
"github.com/google/go-github/v63/github"
"github.com/shurcooL/githubv4"
)
const (
BaseBranch = "base"
DeletedExt = ".deleted"
)
const (
EnvRepo = "PATCH2PR_TEST_REPO"
EnvToken = "PATCH2PR_TEST_GITHUB_TOKEN"
EnvDebug = "PATCH2PR_TEST_DEBUG"
)
func TestApplier(t *testing.T) {
tctx := prepareTestContext(t)
t.Logf("Test ID: %s", tctx.ID)
t.Logf("Test Repository: %s", tctx.Repo.String())
createBranch(t, tctx)
defer cleanupBranches(t, tctx)
patches, err := filepath.Glob(filepath.Join("testdata", "patches", "*.patch"))
if err != nil {
t.Fatalf("error listing patches: %v", err)
}
t.Logf("Discovered %d patches", len(patches))
for _, patch := range patches {
name := strings.TrimSuffix(filepath.Base(patch), ".patch")
t.Run(name, func(t *testing.T) {
runPatchTest(t, tctx, name)
})
}
}
type TestContext struct {
context.Context
ID string
Repo Repository
BaseCommit *github.Commit
BaseTree *github.Tree
Client *github.Client
V4Client *githubv4.Client
}
func (tctx *TestContext) Branch(name string) string {
return fmt.Sprintf("refs/heads/test/%s/%s", tctx.ID, name)
}
func runPatchTest(t *testing.T, tctx *TestContext, name string) {
f, err := os.Open(filepath.Join("testdata", "patches", name+".patch"))
if err != nil {
t.Fatalf("error opening patch file: %v", err)
}
defer f.Close()
files, _, err := gitdiff.Parse(f)
if err != nil {
t.Fatalf("error parsing patch: %v", err)
}
applier := NewApplier(tctx.Client, tctx.Repo, tctx.BaseCommit)
for _, file := range files {
if _, err := applier.Apply(tctx, file); err != nil {
t.Fatalf("error applying file patch: %s: %v", file.NewName, err)
}
}
commit, err := applier.Commit(tctx, nil, &gitdiff.PatchHeader{
Title: name,
})
if err != nil {
t.Fatalf("error committing changes: %v", err)
}
ref := NewReference(tctx.Client, tctx.Repo, tctx.Branch(name))
if err := ref.Set(tctx, commit.GetSHA(), true); err != nil {
t.Fatalf("error creating ref: %v", err)
}
assertPatchResult(t, tctx, name, commit)
}
type treeFile struct {
Mode string
SHA string
Content []byte
}
func assertPatchResult(t *testing.T, tctx *TestContext, name string, c *github.Commit) {
expected := entriesToMap(tctx.BaseTree.Entries)
root := filepath.Join("testdata", "patches", name) + string(filepath.Separator)
if err := filepath.WalkDir(root, func(path string, d fs.DirEntry, err error) error {
if err != nil {
return err
}
if d.IsDir() {
return nil
}
relpath := filepath.ToSlash(strings.TrimPrefix(path, root))
if strings.HasSuffix(relpath, DeletedExt) {
delete(expected, strings.TrimSuffix(relpath, DeletedExt))
return nil
}
info, err := d.Info()
if err != nil {
return err
}
var content []byte
if info.Mode()&fs.ModeSymlink > 0 {
target, err := os.Readlink(path)
if err != nil {
return err
}
content = []byte(target)
} else {
content, err = os.ReadFile(path)
if err != nil {
return err
}
}
expected[relpath] = treeFile{
Mode: getGitMode(info),
Content: content,
}
return nil
}); err != nil {
t.Fatalf("error listing expected files: %v", err)
}
actualTree, _, err := tctx.Client.Git.GetTree(tctx, tctx.Repo.Owner, tctx.Repo.Name, c.GetTree().GetSHA(), true)
if err != nil {
t.Fatalf("error getting actual tree: %v", err)
}
actual := entriesToMap(actualTree.Entries)
for path, file := range actual {
expectedFile, ok := expected[path]
if !ok {
t.Errorf("unexpected file %s", path)
continue
}
delete(expected, path)
if expectedFile.SHA != "" {
if expectedFile.SHA != file.SHA {
t.Errorf("unexpected modification to %s", path)
}
continue
}
if expectedFile.Mode != file.Mode {
t.Errorf("incorrect mode: expected %s, actual %s: %s", expectedFile.Mode, file.Mode, path)
continue
}
content, _, err := tctx.Client.Git.GetBlobRaw(tctx, tctx.Repo.Owner, tctx.Repo.Name, file.SHA)
if err != nil {
t.Fatalf("error getting blob content: %v", err)
}
if !bytes.Equal(expectedFile.Content, content) {
t.Errorf("incorrect content: %s\nexpected: %q\n actual: %q", path, expectedFile.Content, content)
}
}
for path := range expected {
t.Errorf("missing file %s", path)
}
}
func entriesToMap(entries []*github.TreeEntry) map[string]treeFile {
m := make(map[string]treeFile)
for _, entry := range entries {
if entry.GetType() != "blob" {
continue
}
m[entry.GetPath()] = treeFile{
Mode: entry.GetMode(),
SHA: entry.GetSHA(),
}
}
return m
}
func getGitMode(info fs.FileInfo) string {
if info.Mode()&fs.ModeSymlink > 0 {
return "120000"
}
return fmt.Sprintf("100%o", info.Mode())
}
func prepareTestContext(t *testing.T) *TestContext {
id := strconv.FormatInt(time.Now().UnixNano()/1000000, 10)
fullRepo, ok := os.LookupEnv(EnvRepo)
if !ok || fullRepo == "" {
t.Skipf("%s must be set in the environment", EnvRepo)
}
token, ok := os.LookupEnv(EnvToken)
if !ok || token == "" {
t.Skipf("%s must be set in the environment", EnvToken)
}
repo, err := ParseRepository(fullRepo)
if err != nil {
t.Fatalf("Invalid %s value: %v", EnvRepo, err)
}
ctx := context.Background()
httpClient := internal.NewTokenClient(token)
tctx := TestContext{
Context: ctx,
ID: id,
Repo: repo,
Client: github.NewClient(httpClient),
V4Client: githubv4.NewClient(httpClient),
}
return &tctx
}
func createBranch(t *testing.T, tctx *TestContext) {
root := filepath.Join("testdata", "base") + string(filepath.Separator)
var entries []*github.TreeEntry
if err := filepath.WalkDir(root, func(path string, d fs.DirEntry, err error) error {
if err != nil {
return err
}
if d.IsDir() {
return nil
}
content, err := os.ReadFile(path)
if err != nil {
return err
}
info, err := d.Info()
if err != nil {
return err
}
treePath := strings.TrimPrefix(path, root)
entry := github.TreeEntry{
Path: &treePath,
Type: github.String("blob"),
Mode: github.String(getGitMode(info)),
}
if strings.HasSuffix(d.Name(), ".bin") {
c := base64.StdEncoding.EncodeToString(content)
blob, _, err := tctx.Client.Git.CreateBlob(tctx, tctx.Repo.Owner, tctx.Repo.Name, &github.Blob{
Encoding: github.String("base64"),
Content: &c,
})
if err != nil {
return err
}
entry.SHA = blob.SHA
} else {
c := string(content)
entry.Content = &c
}
entries = append(entries, &entry)
return nil
}); err != nil {
t.Fatalf("error listing base files: %v", err)
}
tree, _, err := tctx.Client.Git.CreateTree(tctx, tctx.Repo.Owner, tctx.Repo.Name, "", entries)
if err != nil {
t.Fatalf("error creating tree: %v", err)
}
fullTree, _, err := tctx.Client.Git.GetTree(tctx, tctx.Repo.Owner, tctx.Repo.Name, tree.GetSHA(), true)
if err != nil {
t.Fatalf("error getting recursive tree: %v", err)
}
commit := &github.Commit{
Message: github.String("Base commit for test"),
Tree: tree,
}
commit, _, err = tctx.Client.Git.CreateCommit(tctx, tctx.Repo.Owner, tctx.Repo.Name, commit, nil)
if err != nil {
t.Fatalf("error creating commit: %v", err)
}
tctx.BaseCommit = commit
tctx.BaseTree = fullTree
if _, _, err := tctx.Client.Git.CreateRef(tctx, tctx.Repo.Owner, tctx.Repo.Name, &github.Reference{
Ref: github.String(tctx.Branch(BaseBranch)),
Object: &github.GitObject{
SHA: commit.SHA,
},
}); err != nil {
t.Fatalf("error creating ref: %v", err)
}
}
func cleanupBranches(t *testing.T, tctx *TestContext) {
if isDebug() && t.Failed() {
t.Logf("Debug mode enabled with failing tests, skipping ref cleanup: %s", tctx.ID)
return
}
refs, _, err := tctx.Client.Git.ListMatchingRefs(tctx, tctx.Repo.Owner, tctx.Repo.Name, &github.ReferenceListOptions{
Ref: fmt.Sprintf("heads/test/%s/", tctx.ID),
})
if err != nil {
t.Logf("WARNING: failed to list refs; skipping cleanup: %v", err)
return
}
t.Logf("Found %d refs to remove", len(refs))
for _, ref := range refs {
t.Logf("Deleting %s", ref.GetRef())
if _, err := tctx.Client.Git.DeleteRef(tctx, tctx.Repo.Owner, tctx.Repo.Name, ref.GetRef()); err != nil {
t.Logf("WARNING: failed to delete ref %s: %v", ref.GetRef(), err)
}
}
}
func isDebug() bool {
val := os.Getenv(EnvDebug)
return val != ""
}