func BenchmarkLD32k(b *testing.B) {
	for _, t := range tests {
		reader := NewReader(t.fn)
		buf := new(bytes.Buffer)
		io.CopyN(buf, reader, 32*1024)
		for n := 0; n < b.N; n++ {
			langdetect.DetectLanguage(buf.Bytes(), "")
		}
	}
}
func TestLD(t *testing.T) {
	for _, c := range tests {
		reader := NewReader(c.fn)
		buf := new(bytes.Buffer)
		for _, size := range []int64{8192, 32768} {
			io.CopyN(buf, reader, size)
			result := langdetect.DetectLanguage(buf.Bytes(), "")
			code := fmt.Sprintf("%s", result)
			if !stringInSlice(code, c.lang) {
				t.Errorf("%s: got %s, want one of %+v", c.fn, code, c.lang)
			}
		}
	}
}