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package loose_test
import (
"bytes"
"io"
"testing"
"codeberg.org/lindenii/furgit/internal/testgit"
"codeberg.org/lindenii/furgit/objectheader"
"codeberg.org/lindenii/furgit/objectid"
"codeberg.org/lindenii/furgit/objecttype"
)
func TestLooseStoreWriteWriterContentAgainstGit(t *testing.T) {
testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) {
testRepo := testgit.NewBareRepo(t, algo)
store := openLooseStore(t, testRepo.Dir(), algo)
content := []byte("written-by-content-writer\n")
expectedHex := testRepo.RunInput(t, content, "hash-object", "-t", "blob", "--stdin")
expectedID, err := objectid.ParseHex(algo, expectedHex)
if err != nil {
t.Fatalf("ParseHex(expected): %v", err)
}
writer, finalize, err := store.WriteWriterContent(objecttype.TypeBlob, int64(len(content)))
if err != nil {
t.Fatalf("WriteWriterContent: %v", err)
}
if _, err := io.Copy(writer, bytes.NewReader(content)); err != nil {
t.Fatalf("WriteWriterContent write: %v", err)
}
if err := writer.Close(); err != nil {
t.Fatalf("WriteWriterContent close: %v", err)
}
writtenID, err := finalize()
if err != nil {
t.Fatalf("WriteWriterContent finalize: %v", err)
}
if writtenID != expectedID {
t.Fatalf("WriteWriterContent id = %s, want %s", writtenID, expectedID)
}
gotBody := testRepo.CatFile(t, "blob", writtenID)
if !bytes.Equal(gotBody, content) {
t.Fatalf("git cat-file body mismatch")
}
// Writing the same object again should succeed and return the same ID.
writer, finalize, err = store.WriteWriterContent(objecttype.TypeBlob, int64(len(content)))
if err != nil {
t.Fatalf("WriteWriterContent second: %v", err)
}
if _, err := io.Copy(writer, bytes.NewReader(content)); err != nil {
t.Fatalf("WriteWriterContent second write: %v", err)
}
if err := writer.Close(); err != nil {
t.Fatalf("WriteWriterContent second close: %v", err)
}
writtenID2, err := finalize()
if err != nil {
t.Fatalf("WriteWriterContent second finalize: %v", err)
}
if writtenID2 != expectedID {
t.Fatalf("WriteWriterContent second id = %s, want %s", writtenID2, expectedID)
}
})
}
func TestLooseStoreWriteWriterFullAgainstGit(t *testing.T) {
testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) {
testRepo := testgit.NewBareRepo(t, algo)
store := openLooseStore(t, testRepo.Dir(), algo)
body := []byte("full-writer-body\n")
header, ok := objectheader.Encode(objecttype.TypeBlob, int64(len(body)))
if !ok {
t.Fatalf("objectheader.Encode failed")
}
raw := make([]byte, len(header)+len(body))
copy(raw, header)
copy(raw[len(header):], body)
wantID := algo.Sum(raw)
writer, finalize, err := store.WriteWriterFull()
if err != nil {
t.Fatalf("WriteWriterFull: %v", err)
}
if _, err := io.Copy(writer, bytes.NewReader(raw)); err != nil {
t.Fatalf("WriteWriterFull write: %v", err)
}
if err := writer.Close(); err != nil {
t.Fatalf("WriteWriterFull close: %v", err)
}
gotID, err := finalize()
if err != nil {
t.Fatalf("WriteWriterFull finalize: %v", err)
}
if gotID != wantID {
t.Fatalf("WriteWriterFull id = %s, want %s", gotID, wantID)
}
gotBody := testRepo.CatFile(t, "blob", gotID)
if !bytes.Equal(gotBody, body) {
t.Fatalf("git cat-file body mismatch")
}
})
}
func TestLooseStoreWriterValidationErrors(t *testing.T) {
testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) {
testRepo := testgit.NewBareRepo(t, algo)
store := openLooseStore(t, testRepo.Dir(), algo)
t.Run("content overflow", func(t *testing.T) {
writer, finalize, err := store.WriteWriterContent(objecttype.TypeBlob, 1)
if err != nil {
t.Fatalf("WriteWriterContent: %v", err)
}
if _, err := writer.Write([]byte("hello")); err == nil {
t.Fatalf("expected overflow error")
}
_ = writer.Close()
if _, err := finalize(); err == nil {
t.Fatalf("expected finalize error after overflow")
}
})
t.Run("content short", func(t *testing.T) {
writer, finalize, err := store.WriteWriterContent(objecttype.TypeBlob, 5)
if err != nil {
t.Fatalf("WriteWriterContent: %v", err)
}
if _, err := writer.Write([]byte("x")); err != nil {
t.Fatalf("write short: %v", err)
}
if err := writer.Close(); err != nil {
t.Fatalf("close short: %v", err)
}
if _, err := finalize(); err == nil {
t.Fatalf("expected finalize error for short content")
}
})
t.Run("full malformed header", func(t *testing.T) {
writer, finalize, err := store.WriteWriterFull()
if err != nil {
t.Fatalf("WriteWriterFull: %v", err)
}
if _, err := writer.Write([]byte("not-a-header")); err != nil {
t.Fatalf("write malformed header bytes unexpectedly failed: %v", err)
}
if err := writer.Close(); err != nil {
t.Fatalf("close malformed header: %v", err)
}
if _, err := finalize(); err == nil {
t.Fatalf("expected finalize error for malformed header")
}
})
t.Run("full size mismatch", func(t *testing.T) {
writer, finalize, err := store.WriteWriterFull()
if err != nil {
t.Fatalf("WriteWriterFull: %v", err)
}
raw := []byte("blob 1\x00hello")
if _, err := io.Copy(writer, bytes.NewReader(raw)); err == nil {
t.Fatalf("expected overflow error")
}
_ = writer.Close()
if _, err := finalize(); err == nil {
t.Fatalf("expected finalize error after mismatch")
}
})
})
}
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