c := testing.AllocsPerRun(10, func() {
		input.Reset(compressed)
		r.Reset(input)
		io.Copy(io.Discard, r)
	})
	if c != 0 {
		t.Errorf("got %v allocs, want 0", c)
	}
}

func TestFileSamples(t *testing.T) {
	samples, err := os.ReadDir("testdata")
	if err != nil {
		t.Fatal(err)
	}

	for _, sample := range samples {
		name := sample.Name()
		if !strings.HasSuffix(name, ".zst") {