text that turns binary further on has no content, like an image

1 files changed, 4 insertions, 6 deletions

diff --git a/internal/extract/plain_test.go b/internal/extract/plain_test.go
index f49caf8..5752bf8 100644
--- a/internal/extract/plain_test.go
+++ b/internal/extract/plain_test.go
@@ -154,15 +154,13 @@ func TestToolsListedInOrder(t *testing.T) {
 // but the file goes on to hold an invalid UTF-8 byte and a NUL past that
 // sample — sniffText must reject the whole file, not just decode what the
 // sample alone promised (it must not fall back to Latin-1 the way a known
-// text extension would). It is not "no text in this format" either: the
-// text it began with could hold a keyword, so it is ErrMixed, a read
-// failure, and a content exclude fails closed on it (plan 10 re-check R4).
+// text extension would). Such a file - a self-extracting installer, say -
+// has no text in krino's sense (Łukasz, after the plan 10 re-check).
 func TestSniffWholeFileMustBeValid(t *testing.T) {
 	e := newWithPath("")
 	data := append([]byte(strings.Repeat("x", 8192)), 0xFF, 0x00)
-	_, err := text(t, e, file(t, "blob.data", data), 0)
-	if !errors.Is(err, ErrMixed) || errors.Is(err, ErrUnsupported) {
-		t.Errorf("got %v, want ErrMixed and not ErrUnsupported", err)
+	if _, err := text(t, e, file(t, "blob.data", data), 0); !errors.Is(err, ErrUnsupported) {
+		t.Errorf("got %v, want ErrUnsupported", err)
 	}
 }