}
			if err != nil {
				break
			}
		}
		if err != test.err {
			t.Errorf("expected error %v, got %v", test.err, err)
		}
	}
}

func BenchmarkReadString(b *testing.B) {
	const n = 32 << 10

	data := make([]byte, n)
	data[n-1] = 'x'
	b.SetBytes(int64(n))
	for i := 0; i < b.N; i++ {
		buf := NewBuffer(data)
		_, err := buf.ReadString('x')
		if err != nil {
			b.Fatal(err)
		}