zlib, flatex: Remove code related to dicts

Git never uses them

1 files changed, 5 insertions, 44 deletions

diff --git a/internal/zlibx/decompress_test.go b/internal/zlibx/decompress_test.go
index 3dfc07a5..8dcc6c02 100644
--- a/internal/zlibx/decompress_test.go
+++ b/internal/zlibx/decompress_test.go
@@ -6,21 +6,10 @@ import (
 	"testing"
 )
 
-func compressZlib(t *testing.T, payload, dict []byte) []byte {
+func compressZlib(t *testing.T, payload []byte) []byte {
 	t.Helper()
 	var buf bytes.Buffer
-	var (
-		w   *stdzlib.Writer
-		err error
-	)
-	if dict != nil {
-		w, err = stdzlib.NewWriterLevelDict(&buf, stdzlib.DefaultCompression, dict)
-	} else {
-		w = stdzlib.NewWriter(&buf)
-	}
-	if err != nil {
-		t.Fatalf("NewWriter: %v", err)
-	}
+	w := stdzlib.NewWriter(&buf)
 	if _, err := w.Write(payload); err != nil {
 		t.Fatalf("Write: %v", err)
 	}
@@ -32,7 +21,7 @@ func compressZlib(t *testing.T, payload, dict []byte) []byte {
 
 func TestDecompress(t *testing.T) {
 	payload := []byte("hello, zlib world!")
-	compressed := compressZlib(t, payload, nil)
+	compressed := compressZlib(t, payload)
 
 	out, err := Decompress(compressed)
 	if err != nil {
@@ -45,37 +34,9 @@ func TestDecompress(t *testing.T) {
 	}
 }
 
-func TestDecompressDict(t *testing.T) {
-	dict := []byte("git dictionary for zlib")
-	payload := append([]byte(nil), dict...)
-	payload = append(payload, []byte(" -- extended body -- extended body")...)
-	compressed := compressZlib(t, payload, dict)
-
-	out, err := DecompressDict(compressed, dict)
-	if err != nil {
-		t.Fatalf("DecompressDict: %v", err)
-	}
-	defer out.Release()
-
-	if !bytes.Equal(out.Bytes(), payload) {
-		t.Fatalf("unexpected payload %q", out.Bytes())
-	}
-}
-
-func TestDecompressDictMissing(t *testing.T) {
-	dict := []byte("preset dictionary")
-	payload := append([]byte(nil), dict...)
-	payload = append(payload, []byte(" .. more data ..")...)
-	compressed := compressZlib(t, payload, dict)
-
-	if _, err := Decompress(compressed); err != ErrDictionary {
-		t.Fatalf("expected ErrDictionary, got %v", err)
-	}
-}
-
 func TestDecompressChecksumError(t *testing.T) {
 	payload := []byte("checksum check")
-	compressed := compressZlib(t, payload, nil)
+	compressed := compressZlib(t, payload)
 	compressed[len(compressed)-1] ^= 0xff
 
 	if _, err := Decompress(compressed); err != ErrChecksum {
@@ -85,7 +46,7 @@ func TestDecompressChecksumError(t *testing.T) {
 
 func TestDecompressSizedUsesHint(t *testing.T) {
 	payload := []byte("tiny payload")
-	compressed := compressZlib(t, payload, nil)
+	compressed := compressZlib(t, payload)
 
 	const hint = 1 << 20
 	out, err := DecompressSized(compressed, hint)