package datok

import (
	"bytes"
	"fmt"
	"os"
	"regexp"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
)

var dat *DaTokenizer

func ttokenizeStr(tok Tokenizer, str string) string {
	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	return strings.Join(ttokenize(tok, w, str), "\n")
}

func ttokenize(tok Tokenizer, w *bytes.Buffer, str string) []string {
	w.Reset()
	ok := tok.Transduce(strings.NewReader(str), w)
	if !ok {
		return []string{}
	}
	obj := regexp.MustCompile("\n+")

	tokens := obj.Split(w.String(), -1)
	return tokens[:len(tokens)-1]
}

func TestDoubleArraySimpleString(t *testing.T) {
	assert := assert.New(t)
	// bau | bauamt
	tok := LoadFomaFile("testdata/bauamt.fst")
	dat := tok.ToDoubleArray()

	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	var tokens []string

	tokens = ttokenize(dat, w, "ibauamt")
	assert.Equal("i", tokens[0])
	assert.Equal("bauamt", tokens[1])

	tokens = ttokenize(dat, w, "ibbauamt")
	assert.Equal("i", tokens[0])

	assert.Equal("b", tokens[1])
	assert.Equal("bauamt", tokens[2])

	tokens = ttokenize(dat, w, "bau")
	assert.Equal("bau", tokens[0])

	tokens = ttokenize(dat, w, "baum")
	assert.Equal("bau", tokens[0])
	assert.Equal("m", tokens[1])

	tokens = ttokenize(dat, w, "baudibauamt")
	assert.Equal("bau", tokens[0])
	assert.Equal("d", tokens[1])
	assert.Equal("i", tokens[2])
	assert.Equal("bauamt", tokens[3])
}

func TestDoubleArraySimpleBranches(t *testing.T) {
	assert := assert.New(t)
	// (bau | wahl) (amt | en)
	tok := LoadFomaFile("testdata/wahlamt.fst")
	dat := tok.ToDoubleArray()

	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	var tokens []string

	tokens = ttokenize(dat, w, "bau")
	assert.Equal("bau", tokens[0])

	tokens = ttokenize(dat, w, "bauamt")
	assert.Equal("bauamt", tokens[0])

	tokens = ttokenize(dat, w, "wahlamt")
	assert.Equal("wahlamt", tokens[0])

	tokens = ttokenize(dat, w, "bauen")
	assert.Equal("bauen", tokens[0])

	tokens = ttokenize(dat, w, "wahlen")
	assert.Equal("wahlen", tokens[0])

	tokens = ttokenize(dat, w, "baum")
	assert.Equal("bau", tokens[0])
	assert.Equal("m", tokens[1])
}

func TestDoubleArraySimpleTokenizer(t *testing.T) {
	assert := assert.New(t)
	tok := LoadFomaFile("testdata/simpletok.fst")
	dat := tok.ToDoubleArray()
	assert.Equal(ttokenizeStr(dat, "bau"), "bau")
	assert.Equal(ttokenizeStr(dat, "bad"), "bad")
	assert.Equal(ttokenizeStr(dat, "wald gehen"), "wald\ngehen")
}

func TestDoubleArraySimpleTokenizerTransduce(t *testing.T) {
	assert := assert.New(t)
	tok := LoadFomaFile("testdata/simpletok.fst")
	dat := tok.ToDoubleArray()

	r := strings.NewReader("  wald   gehen Da kann\t man was \"erleben\"!")
	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	var tokens []string
	dat.Transduce(r, w)
	tokens = strings.Split(w.String(), "\n")
	assert.Equal(len(tokens), 11)
	assert.Equal("wald", tokens[0])
	assert.Equal("gehen", tokens[1])
	assert.Equal("Da", tokens[2])
	assert.Equal("kann", tokens[3])
	assert.Equal("man", tokens[4])
	assert.Equal("was", tokens[5])
	assert.Equal("\"erleben\"", tokens[6])

	r = strings.NewReader(" In den Wald gehen? -- Da kann\t man was \"erleben\"!")
	w.Reset()
	dat.Transduce(r, w)
	tokens = strings.Split(w.String(), "\n")
	assert.Equal("In", tokens[0])
	assert.Equal("den", tokens[1])
	assert.Equal("Wald", tokens[2])
	assert.Equal("gehen", tokens[3])
	assert.Equal("?", tokens[4])
	assert.Equal("--", tokens[5])

	r = strings.NewReader(" g? -- D")
	w.Reset()
	dat.Transduce(r, w)
	tokens = strings.Split(w.String(), "\n")
	assert.Equal("g", tokens[0])
	assert.Equal("?", tokens[1])
	assert.Equal("--", tokens[2])
	assert.Equal("D", tokens[3])
	assert.Equal("", tokens[4])
	assert.Equal("", tokens[5])
	assert.Equal(7, len(tokens))
}

func TestDoubleArrayReadWriteTokenizer(t *testing.T) {
	assert := assert.New(t)
	tok := LoadFomaFile("testdata/simpletok.fst")
	dat := tok.ToDoubleArray()
	assert.Equal(ttokenizeStr(dat, "bau"), "bau")
	assert.Equal(ttokenizeStr(dat, "bad"), "bad")
	assert.Equal(ttokenizeStr(dat, "wald gehen"), "wald\ngehen")

	b := make([]byte, 0, 1024)
	buf := bytes.NewBuffer(b)
	n, err := dat.WriteTo(buf)
	assert.Nil(err)
	assert.Equal(int64(296), n)

	dat2 := ParseDatok(buf)
	assert.NotNil(dat2)
	assert.Equal(dat.array, dat2.array)
	assert.Equal(dat.sigma, dat2.sigma)
	assert.Equal(dat.epsilon, dat2.epsilon)
	assert.Equal(dat.unknown, dat2.unknown)
	assert.Equal(dat.identity, dat2.identity)
	assert.Equal(dat.final, dat2.final)
	assert.Equal(dat.LoadFactor(), dat2.LoadFactor())
	assert.Equal(ttokenizeStr(dat2, "bau"), "bau")
	assert.Equal(ttokenizeStr(dat2, "bad"), "bad")
	assert.Equal(ttokenizeStr(dat2, "wald gehen"), "wald\ngehen")

	assert.Equal(dat.TransCount(), 17)
	assert.Equal(dat2.TransCount(), 17)
}

func TestDoubleArrayIgnorableMCS(t *testing.T) {

	// This test relies on final states. That's why it is
	// not working correctly anymore.

	assert := assert.New(t)
	// File has MCS in sigma but not in net
	tok := LoadFomaFile("testdata/ignorable_mcs.fst")
	assert.NotNil(tok)
	dat := tok.ToDoubleArray()
	assert.NotNil(dat)

	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	var tokens []string

	// Is only unambigous when transducing strictly greedy!
	assert.True(dat.Transduce(strings.NewReader("ab<ab>a"), w))
	tokens = strings.Split(w.String(), "\n")
	assert.Equal("a\nb\n<ab>a\n\n\n", w.String())
	assert.Equal("a", tokens[0])
	assert.Equal("b", tokens[1])
	assert.Equal("<ab>a", tokens[2])
	assert.Equal(6, len(tokens))
	assert.Equal(dat.TransCount(), 15)
}

func TestDoubleArrayFullTokenizer(t *testing.T) {
	assert := assert.New(t)

	if dat == nil {
		dat = LoadDatokFile("testdata/tokenizer.datok")
	}
	assert.NotNil(dat)
	assert.True(dat.LoadFactor() >= 60)
	assert.Equal(dat.epsilon, 1)
	assert.Equal(dat.unknown, 2)
	assert.Equal(dat.identity, 3)
	// assert.Equal(dat.final, 142)
	// assert.Equal(len(dat.sigma), 137)
	// assert.True(len(dat.array) > 3000000)
	// assert.True(dat.maxSize > 3000000)
	assert.Equal(ttokenizeStr(dat, "bau"), "bau")
	assert.Equal(ttokenizeStr(dat, "bad"), "bad")
	assert.Equal(ttokenizeStr(dat, "wald gehen"), "wald\ngehen")
}

func TestDoubleArrayTokenizerBranch(t *testing.T) {
	assert := assert.New(t)
	tok := LoadTokenizerFile("testdata/simpletok.datok")
	assert.NotNil(tok)
	assert.Equal(tok.Type(), "DATOK")

	tok = LoadTokenizerFile("testdata/simpletok.matok")
	assert.NotNil(tok)
	assert.Equal(tok.Type(), "MATOK")
}

func XTestDoubleArrayFullTokenizerBuild(t *testing.T) {
	assert := assert.New(t)
	tok := LoadFomaFile("testdata/tokenizer.fst")
	dat := tok.ToDoubleArray()
	assert.NotNil(dat)
	// n, err := dat.Save("testdata/tokenizer.datok")
	// assert.Nil(err)
	// assert.True(n > 500)
}

func TestDoubleArrayFullTokenizerTransduce(t *testing.T) {
	assert := assert.New(t)

	if dat == nil {
		dat = LoadDatokFile("testdata/tokenizer.datok")
	}

	assert.NotNil(dat)

	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	var tokens []string

	assert.True(dat.Transduce(strings.NewReader("tra. u Du?"), w))

	tokens = strings.Split(w.String(), "\n")
	assert.Equal("tra\n.\n\nu\nDu\n?\n\n\n", w.String())
	assert.Equal("tra", tokens[0])
	assert.Equal(".", tokens[1])
	assert.Equal("", tokens[2])
	assert.Equal("u", tokens[3])
	assert.Equal("Du", tokens[4])
	assert.Equal("?", tokens[5])
	assert.Equal("", tokens[6])
	assert.Equal("", tokens[7])
	assert.Equal("", tokens[8])
	assert.Equal(9, len(tokens))

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("\"John Doe\"@xx.com"), w))
	assert.Equal("\"\nJohn\nDoe\n\"\n@xx\n.\n\ncom\n\n\n", w.String())
}

func TestDoubleArrayFullTokenizerSentenceSplitter(t *testing.T) {
	assert := assert.New(t)

	if dat == nil {
		dat = LoadDatokFile("testdata/tokenizer.datok")
	}

	assert.NotNil(dat)

	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	var sentences []string

	// testSentSplitterSimple
	assert.True(dat.Transduce(strings.NewReader("Der alte Mann."), w))
	sentences = strings.Split(w.String(), "\n\n")

	assert.Equal("Der\nalte\nMann\n.\n\n\n", w.String())
	assert.Equal("Der\nalte\nMann\n.", sentences[0])
	assert.Equal("\n", sentences[1])
	assert.Equal(2, len(sentences))

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("Der Vorsitzende der Abk. hat gewählt."), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal(2, len(sentences))
	assert.Equal("Der\nVorsitzende\nder\nAbk.\nhat\ngewählt\n.", sentences[0])
	assert.Equal("\n", sentences[1])

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader(""), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal(2, len(sentences))
	assert.Equal("", sentences[0])

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("Gefunden auf wikipedia.org."), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal(len(sentences), 2)

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("Ich bin unter korap@ids-mannheim.de erreichbar."), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal(len(sentences), 2)

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("Unsere Website ist https://korap.ids-mannheim.de/?q=Baum"), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal("Unsere\nWebsite\nist\nhttps://korap.ids-mannheim.de/?q=Baum", sentences[0])
	assert.Equal("\n", sentences[1])
	assert.Equal(2, len(sentences))

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("Unser Server ist 10.0.10.51."), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal("\n", sentences[1])
	assert.Equal(2, len(sentences))

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("Zu 50.4% ist es sicher"), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal(len(sentences), 2)

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("Der Termin ist am 5.9.2018"), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal(len(sentences), 2)

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("Ich habe die readme.txt heruntergeladen"), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal(2, len(sentences))
	assert.Equal("Ich\nhabe\ndie\nreadme.txt\nheruntergeladen", sentences[0])
	assert.Equal("\n", sentences[1])

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("Ausschalten!!! Hast Du nicht gehört???"), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal(3, len(sentences))
	assert.Equal("Ausschalten\n!!!", sentences[0])
	assert.Equal("Hast\nDu\nnicht\ngehört\n???", sentences[1])
	assert.Equal("\n", sentences[2])

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader("Ich wohne in der Weststr. und Du?"), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal(len(sentences), 2)

	/*
		Test:
		"\"Ausschalten!!!\", sagte er. \"Hast Du nicht gehört???\""), w))
	*/
}

func TestDoubleArrayFullTokenizerTokenSplitter(t *testing.T) {
	assert := assert.New(t)

	if dat == nil {
		dat = LoadDatokFile("testdata/tokenizer.datok")
	}

	assert.NotNil(dat)

	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	var tokens []string

	// testTokenizerSimple
	tokens = ttokenize(dat, w, "Der alte Mann")
	assert.Equal(tokens[0], "Der")
	assert.Equal(tokens[1], "alte")
	assert.Equal(tokens[2], "Mann")
	assert.Equal(len(tokens), 3)

	tokens = ttokenize(dat, w, "Der alte Mann.")
	assert.Equal(tokens[0], "Der")
	assert.Equal(tokens[1], "alte")
	assert.Equal(tokens[2], "Mann")
	assert.Equal(tokens[3], ".")
	assert.Equal(len(tokens), 4)

	// testTokenizerAbbr
	tokens = ttokenize(dat, w, "Der Vorsitzende der F.D.P. hat gewählt")
	assert.Equal(tokens[0], "Der")
	assert.Equal(tokens[1], "Vorsitzende")
	assert.Equal(tokens[2], "der")
	assert.Equal(tokens[3], "F.D.P.")
	assert.Equal(tokens[4], "hat")
	assert.Equal(tokens[5], "gewählt")
	assert.Equal(len(tokens), 6)
	// Ignored in KorAP-Tokenizer

	// testTokenizerHost1
	tokens = ttokenize(dat, w, "Gefunden auf wikipedia.org")
	assert.Equal(tokens[0], "Gefunden")
	assert.Equal(tokens[1], "auf")
	assert.Equal(tokens[2], "wikipedia.org")
	assert.Equal(len(tokens), 3)

	// testTokenizerWwwHost
	tokens = ttokenize(dat, w, "Gefunden auf www.wikipedia.org")
	assert.Equal("Gefunden", tokens[0])
	assert.Equal("auf", tokens[1])
	assert.Equal("www.wikipedia.org", tokens[2])
	assert.Equal(3, len(tokens))

	// testTokenizerWwwUrl
	tokens = ttokenize(dat, w, "Weitere Infos unter www.info.biz/info")
	assert.Equal("www.info.biz/info", tokens[3])

	// testTokenizerFtpHost
	/*
		tokens = tokenize(dat, w, "Kann von ftp.download.org heruntergeladen werden")
		assert.Equal("Kann", tokens[0])
		assert.Equal("von", tokens[1])
		assert.Equal("ftp.download.org", tokens[2])
		assert.Equal(5, len(tokens))
		// Ignored in KorAP-Tokenizer
	*/

	// testTokenizerDash
	tokens = ttokenize(dat, w, "Das war -- spitze")
	assert.Equal(tokens[0], "Das")
	assert.Equal(tokens[1], "war")
	assert.Equal(tokens[2], "--")
	assert.Equal(tokens[3], "spitze")
	assert.Equal(len(tokens), 4)

	// testTokenizerEmail1
	tokens = ttokenize(dat, w, "Ich bin unter korap@ids-mannheim.de erreichbar.")
	assert.Equal(tokens[0], "Ich")
	assert.Equal(tokens[1], "bin")
	assert.Equal(tokens[2], "unter")
	assert.Equal(tokens[3], "korap@ids-mannheim.de")
	assert.Equal(tokens[4], "erreichbar")
	assert.Equal(tokens[5], ".")
	assert.Equal(len(tokens), 6)

	// testTokenizerEmail2
	tokens = ttokenize(dat, w, "Oder unter korap[at]ids-mannheim[dot]de.")
	assert.Equal(tokens[0], "Oder")
	assert.Equal(tokens[1], "unter")
	assert.Equal(tokens[2], "korap[at]ids-mannheim[dot]de")
	assert.Equal(tokens[3], ".")
	assert.Equal(len(tokens), 4)

	// testTokenizerEmail3
	tokens = ttokenize(dat, w, "Oder unter korap(at)ids-mannheim(dot)de.")
	assert.Equal(tokens[0], "Oder")
	assert.Equal(tokens[1], "unter")
	assert.Equal(tokens[2], "korap(at)ids-mannheim(dot)de")
	assert.Equal(tokens[3], ".")
	assert.Equal(len(tokens), 4)
	// Ignored in KorAP-Tokenizer

	// testTokenizerDoNotAcceptQuotedEmailNames
	tokens = ttokenize(dat, w, "\"John Doe\"@xx.com")
	assert.Equal("\"", tokens[0])
	assert.Equal("John", tokens[1])
	assert.Equal("Doe", tokens[2])
	assert.Equal("\"", tokens[3])
	assert.Equal("@xx", tokens[4])
	assert.Equal(".", tokens[5]) // Differs - as the sentence splitter splits here!
	assert.Equal("com", tokens[6])
	assert.Equal(7, len(tokens))

	// testTokenizerTwitter
	tokens = ttokenize(dat, w, "Folgt @korap und #korap")
	assert.Equal(tokens[0], "Folgt")
	assert.Equal(tokens[1], "@korap")
	assert.Equal(tokens[2], "und")
	assert.Equal(tokens[3], "#korap")
	assert.Equal(len(tokens), 4)

	// testTokenizerWeb1
	tokens = ttokenize(dat, w, "Unsere Website ist https://korap.ids-mannheim.de/?q=Baum")
	assert.Equal(tokens[0], "Unsere")
	assert.Equal(tokens[1], "Website")
	assert.Equal(tokens[2], "ist")
	assert.Equal(tokens[3], "https://korap.ids-mannheim.de/?q=Baum")
	assert.Equal(len(tokens), 4)

	// testTokenizerWeb2
	tokens = ttokenize(dat, w, "Wir sind auch im Internet (https://korap.ids-mannheim.de/?q=Baum)")
	assert.Equal(tokens[0], "Wir")
	assert.Equal(tokens[1], "sind")
	assert.Equal(tokens[2], "auch")
	assert.Equal(tokens[3], "im")
	assert.Equal(tokens[4], "Internet")
	assert.Equal(tokens[5], "(")
	assert.Equal(tokens[6], "https://korap.ids-mannheim.de/?q=Baum")
	assert.Equal(tokens[7], ")")
	assert.Equal(len(tokens), 8)
	// Ignored in KorAP-Tokenizer

	// testTokenizerWeb3
	tokens = ttokenize(dat, w, "Die Adresse ist https://korap.ids-mannheim.de/?q=Baum.")
	assert.Equal(tokens[0], "Die")
	assert.Equal(tokens[1], "Adresse")
	assert.Equal(tokens[2], "ist")
	assert.Equal(tokens[3], "https://korap.ids-mannheim.de/?q=Baum")
	assert.Equal(tokens[4], ".")
	assert.Equal(len(tokens), 5)
	// Ignored in KorAP-Tokenizer

	// testTokenizerServer
	tokens = ttokenize(dat, w, "Unser Server ist 10.0.10.51.")
	assert.Equal(tokens[0], "Unser")
	assert.Equal(tokens[1], "Server")
	assert.Equal(tokens[2], "ist")
	assert.Equal(tokens[3], "10.0.10.51")
	assert.Equal(tokens[4], ".")
	assert.Equal(len(tokens), 5)

	// testTokenizerNum
	tokens = ttokenize(dat, w, "Zu 50,4% ist es sicher")
	assert.Equal(tokens[0], "Zu")
	assert.Equal(tokens[1], "50,4%")
	assert.Equal(tokens[2], "ist")
	assert.Equal(tokens[3], "es")
	assert.Equal(tokens[4], "sicher")
	assert.Equal(len(tokens), 5)
	// Differs from KorAP-Tokenizer

	// testTokenizerDate
	tokens = ttokenize(dat, w, "Der Termin ist am 5.9.2018")
	assert.Equal(tokens[0], "Der")
	assert.Equal(tokens[1], "Termin")
	assert.Equal(tokens[2], "ist")
	assert.Equal(tokens[3], "am")
	assert.Equal(tokens[4], "5.9.2018")
	assert.Equal(len(tokens), 5)

	tokens = ttokenize(dat, w, "Der Termin ist am 5/9/2018")
	assert.Equal(tokens[0], "Der")
	assert.Equal(tokens[1], "Termin")
	assert.Equal(tokens[2], "ist")
	assert.Equal(tokens[3], "am")
	assert.Equal(tokens[4], "5/9/2018")
	assert.Equal(len(tokens), 5)

	// testTokenizerDateRange
	/*
		tokens = tokenize(dat, w, "Der Termin war vom 4.-5.9.2018")
		assert.Equal(tokens[0], "Der")
		assert.Equal(tokens[1], "Termin")
		assert.Equal(tokens[2], "war")
		assert.Equal(tokens[3], "vom")
		assert.Equal(tokens[4], "4.")
		assert.Equal(tokens[5], "-")
		assert.Equal(tokens[6], "5.9.2018")
		assert.Equal(len(tokens), 7)
		// Ignored in KorAP-Tokenizer
	*/

	// testTokenizerEmoji1
	tokens = ttokenize(dat, w, "Das ist toll! ;)")
	assert.Equal(tokens[0], "Das")
	assert.Equal(tokens[1], "ist")
	assert.Equal(tokens[2], "toll")
	assert.Equal(tokens[3], "!")
	assert.Equal(tokens[4], ";)")
	assert.Equal(len(tokens), 5)

	// testTokenizerRef1
	tokens = ttokenize(dat, w, "Kupietz und Schmidt (2018): Korpuslinguistik")
	assert.Equal(tokens[0], "Kupietz")
	assert.Equal(tokens[1], "und")
	assert.Equal(tokens[2], "Schmidt")
	assert.Equal(tokens[3], "(2018)")
	assert.Equal(tokens[4], ":")
	assert.Equal(tokens[5], "Korpuslinguistik")
	assert.Equal(len(tokens), 6)
	// Differs from KorAP-Tokenizer!

	// testTokenizerRef2 () {
	tokens = ttokenize(dat, w, "Kupietz und Schmidt [2018]: Korpuslinguistik")
	assert.Equal(tokens[0], "Kupietz")
	assert.Equal(tokens[1], "und")
	assert.Equal(tokens[2], "Schmidt")
	assert.Equal(tokens[3], "[2018]")
	assert.Equal(tokens[4], ":")
	assert.Equal(tokens[5], "Korpuslinguistik")
	assert.Equal(len(tokens), 6)
	// Differs from KorAP-Tokenizer!

	// testTokenizerOmission1 () {
	tokens = ttokenize(dat, w, "Er ist ein A****loch!")
	assert.Equal(tokens[0], "Er")
	assert.Equal(tokens[1], "ist")
	assert.Equal(tokens[2], "ein")
	assert.Equal(tokens[3], "A****loch")
	assert.Equal(tokens[4], "!")
	assert.Equal(len(tokens), 5)

	// testTokenizerOmission2
	tokens = ttokenize(dat, w, "F*ck!")
	assert.Equal(tokens[0], "F*ck")
	assert.Equal(tokens[1], "!")
	assert.Equal(len(tokens), 2)

	// testTokenizerOmission3 () {
	tokens = ttokenize(dat, w, "Dieses verf***** Kleid!")
	assert.Equal(tokens[0], "Dieses")
	assert.Equal(tokens[1], "verf*****")
	assert.Equal(tokens[2], "Kleid")
	assert.Equal(tokens[3], "!")
	assert.Equal(len(tokens), 4)

	// Probably interpreted as HOST
	// testTokenizerFileExtension1
	tokens = ttokenize(dat, w, "Ich habe die readme.txt heruntergeladen")
	assert.Equal(tokens[0], "Ich")
	assert.Equal(tokens[1], "habe")
	assert.Equal(tokens[2], "die")
	assert.Equal(tokens[3], "readme.txt")
	assert.Equal(tokens[4], "heruntergeladen")
	assert.Equal(len(tokens), 5)

	// Probably interpreted as HOST
	// testTokenizerFileExtension2
	tokens = ttokenize(dat, w, "Nimm die README.TXT!")
	assert.Equal(tokens[0], "Nimm")
	assert.Equal(tokens[1], "die")
	assert.Equal(tokens[2], "README.TXT")
	assert.Equal(tokens[3], "!")
	assert.Equal(len(tokens), 4)

	// Probably interpreted as HOST
	// testTokenizerFileExtension3
	tokens = ttokenize(dat, w, "Zeig mir profile.jpeg")
	assert.Equal(tokens[0], "Zeig")
	assert.Equal(tokens[1], "mir")
	assert.Equal(tokens[2], "profile.jpeg")
	assert.Equal(len(tokens), 3)

	// testTokenizerFile1

	tokens = ttokenize(dat, w, "Zeig mir c:\\Dokumente\\profile.docx")
	assert.Equal(tokens[0], "Zeig")
	assert.Equal(tokens[1], "mir")
	assert.Equal(tokens[2], "c:\\Dokumente\\profile.docx")
	assert.Equal(len(tokens), 3)

	// testTokenizerFile2
	tokens = ttokenize(dat, w, "Gehe zu /Dokumente/profile.docx")
	assert.Equal(tokens[0], "Gehe")
	assert.Equal(tokens[1], "zu")
	assert.Equal(tokens[2], "/Dokumente/profile.docx")
	assert.Equal(len(tokens), 3)

	// testTokenizerFile3
	tokens = ttokenize(dat, w, "Zeig mir c:\\Dokumente\\profile.jpeg")
	assert.Equal(tokens[0], "Zeig")
	assert.Equal(tokens[1], "mir")
	assert.Equal(tokens[2], "c:\\Dokumente\\profile.jpeg")
	assert.Equal(len(tokens), 3)
	// Ignored in KorAP-Tokenizer

	// testTokenizerPunct
	tokens = ttokenize(dat, w, "Er sagte: \"Es geht mir gut!\", daraufhin ging er.")
	assert.Equal(tokens[0], "Er")
	assert.Equal(tokens[1], "sagte")
	assert.Equal(tokens[2], ":")
	assert.Equal(tokens[3], "\"")
	assert.Equal(tokens[4], "Es")
	assert.Equal(tokens[5], "geht")
	assert.Equal(tokens[6], "mir")
	assert.Equal(tokens[7], "gut")
	assert.Equal(tokens[8], "!")
	assert.Equal(tokens[9], "\"")
	assert.Equal(tokens[10], ",")
	assert.Equal(tokens[11], "daraufhin")
	assert.Equal(tokens[12], "ging")
	assert.Equal(tokens[13], "er")
	assert.Equal(tokens[14], ".")
	assert.Equal(len(tokens), 15)

	// testTokenizerPlusAmpersand
	tokens = ttokenize(dat, w, "&quot;Das ist von C&A!&quot;")
	assert.Equal(tokens[0], "&quot;")
	assert.Equal(tokens[1], "Das")
	assert.Equal(tokens[2], "ist")
	assert.Equal(tokens[3], "von")
	assert.Equal(tokens[4], "C&A")
	assert.Equal(tokens[5], "!")
	assert.Equal(tokens[6], "&quot;")
	assert.Equal(len(tokens), 7)

	// testTokenizerLongEnd
	tokens = ttokenize(dat, w, "Siehst Du?!!?")
	assert.Equal(tokens[0], "Siehst")
	assert.Equal(tokens[1], "Du")
	assert.Equal(tokens[2], "?!!?")
	assert.Equal(len(tokens), 3)

	// testTokenizerIrishO
	tokens = ttokenize(dat, w, "Peter O'Toole")
	assert.Equal(tokens[0], "Peter")
	assert.Equal(tokens[1], "O'Toole")
	assert.Equal(len(tokens), 2)

	// testTokenizerAbr
	tokens = ttokenize(dat, w, "Früher bzw. später ...")
	assert.Equal(tokens[0], "Früher")
	assert.Equal(tokens[1], "bzw.")
	assert.Equal(tokens[2], "später")
	assert.Equal(tokens[3], "...")
	assert.Equal(len(tokens), 4)

	// testTokenizerUppercaseRule
	tokens = ttokenize(dat, w, "Es war spät.Morgen ist es früh.")
	assert.Equal(tokens[0], "Es")
	assert.Equal(tokens[1], "war")
	assert.Equal(tokens[2], "spät")
	assert.Equal(tokens[3], ".")
	assert.Equal(tokens[4], "Morgen")
	assert.Equal(tokens[5], "ist")
	assert.Equal(tokens[6], "es")
	assert.Equal(tokens[7], "früh")
	assert.Equal(tokens[8], ".")
	assert.Equal(len(tokens), 9)
	// Ignored in KorAP-Tokenizer

	// testTokenizerOrd
	tokens = ttokenize(dat, w, "Sie erreichte den 1. Platz!")
	assert.Equal(tokens[0], "Sie")
	assert.Equal(tokens[1], "erreichte")
	assert.Equal(tokens[2], "den")
	assert.Equal(tokens[3], "1.")
	assert.Equal(tokens[4], "Platz")
	assert.Equal(tokens[5], "!")
	assert.Equal(len(tokens), 6)

	// testNoZipOuputArchive
	tokens = ttokenize(dat, w, "Archive:  Ich bin kein zip\n")
	assert.Equal(tokens[0], "Archive")
	assert.Equal(tokens[1], ":")
	assert.Equal(tokens[2], "Ich")
	assert.Equal(tokens[3], "bin")
	assert.Equal(tokens[4], "kein")
	assert.Equal(tokens[5], "zip")
	assert.Equal(6, len(tokens))

	// testTokenizerStrasse
	tokens = ttokenize(dat, w, "Ich wohne in der Weststr. und Du?")
	assert.Equal(tokens[4], "Weststr.")
	assert.Equal(8, len(tokens))

	// germanTokenizerKnowsGermanOmissionWords
	tokens = ttokenize(dat, w, "D'dorf Ku'damm Lu'hafen M'gladbach W'schaft")
	assert.Equal("D'dorf", tokens[0])
	assert.Equal("Ku'damm", tokens[1])
	assert.Equal("Lu'hafen", tokens[2])
	assert.Equal("M'gladbach", tokens[3])
	assert.Equal("W'schaft", tokens[4])
	assert.Equal(5, len(tokens))

	// germanTokenizerDoesNOTSeparateGermanContractions
	tokens = ttokenize(dat, w, "mach's macht's was'n ist's haste willste kannste biste kriegste")
	assert.Equal("mach's", tokens[0])
	assert.Equal("macht's", tokens[1])
	assert.Equal("was'n", tokens[2])
	assert.Equal("ist's", tokens[3])
	assert.Equal("haste", tokens[4])
	assert.Equal("willste", tokens[5])
	assert.Equal("kannste", tokens[6])
	assert.Equal("biste", tokens[7])
	assert.Equal("kriegste", tokens[8])
	assert.Equal(9, len(tokens))

	/*
		@Test
		public void englishTokenizerSeparatesEnglishContractionsAndClitics () {
				DerekoDfaTokenizer_en tok = new DerekoDfaTokenizer_en();
				tokens = tokenize(dat, w, "I've we'll you'd I'm we're Peter's isn't")
				assert.Equal("'ve", tokens[1]);
				assert.Equal("'ll", tokens[3]);
				assert.Equal("'d", tokens[5]);
				assert.Equal("'m", tokens[7]);
				assert.Equal("'re", tokens[9]);
				assert.Equal("'s", tokens[11]);
				assert.Equal("is", tokens[12]);
				assert.Equal("n't", tokens[13]);
				assert.Equal(14, len(tokens));
		}

		@Test
		public void frenchTokenizerKnowsFrenchAbbreviations () {
				DerekoDfaTokenizer_fr tok = new DerekoDfaTokenizer_fr();
				tokens = tokenize(dat, w, "Approx. en juill. 2004 mon prof. M. Foux m'a dit qu'il faut faire exerc. no. 4, et lire pp. 27-30.")
				assert.Equal("Approx.", tokens[0]);
				assert.Equal("juill.", tokens[2]);
				assert.Equal("prof.", tokens[5]);
				assert.Equal("exerc.", tokens[15]);
				assert.Equal("no.", tokens[16]);
				assert.Equal("pp.", tokens[21]);
		}

		@Test
		public void frenchTokenizerKnowsFrenchContractions () {
				DerekoDfaTokenizer_fr tok = new DerekoDfaTokenizer_fr();
				tokens = tokenize(dat, w, "J'ai j'habite qu'il d'un jusqu'à Aujourd'hui D'accord Quelqu'un Presqu'île")
				assert.Equal("J'", tokens[0]);
				assert.Equal("j'", tokens[2]);
				assert.Equal("qu'", tokens[4]);
				assert.Equal("d'", tokens[6]);
				assert.Equal("jusqu'", tokens[8]);
				assert.Equal("Aujourd'hui", tokens[10]);
				assert.Equal("D'", tokens[11]); // ’
				assert.Equal("Quelqu'un", tokens[13]); // ’
				assert.Equal("Presqu'île", tokens[14]); // ’
		}

		@Test
		public void frenchTokenizerKnowsFrenchClitics () {
				DerekoDfaTokenizer_fr tok = new DerekoDfaTokenizer_fr();
				tokens = tokenize(dat, w, "suis-je sont-elles ")
				assert.Equal("suis", tokens[0]);
				assert.Equal("-je", tokens[1]);
				assert.Equal("sont", tokens[2]);
				assert.Equal("-elles", tokens[3]);
		}

		@Test
		public void testEnglishTokenizerScienceAbbreviations () {
				DerekoDfaTokenizer_en tok = new DerekoDfaTokenizer_en();
				tokens = tokenize(dat, w, "Approx. in Sept. 1954, Assoc. Prof. Dr. R. J. Ewing reviewed articles on Enzymol. Bacteriol. effects later published in Nutr. Rheumatol. No. 12 and Nº. 13., pp. 17-18.")
				assert.Equal("Approx.", tokens[0]);
				assert.Equal("in", tokens[1]);
				assert.Equal("Sept.", tokens[2]);
				assert.Equal("1954", tokens[3]);
				assert.Equal(",", tokens[4]);
				assert.Equal("Assoc.", tokens[5]);
				assert.Equal("Prof.", tokens[6]);
				assert.Equal("Dr.", tokens[7]);
				assert.Equal("R.", tokens[8]);
				assert.Equal("J.", tokens[9]);
				assert.Equal("Ewing", tokens[10]);
				assert.Equal("reviewed", tokens[11]);
				assert.Equal("articles", tokens[12]);
				assert.Equal("on", tokens[13]);
				assert.Equal("Enzymol.", tokens[14]);
				assert.Equal("Bacteriol.", tokens[15]);
				assert.Equal("effects", tokens[16]);
				assert.Equal("later", tokens[17]);
				assert.Equal("published", tokens[18]);
				assert.Equal("in", tokens[19]);
				assert.Equal("Nutr.", tokens[20]);
				assert.Equal("Rheumatol.", tokens[21]);
				assert.Equal("No.", tokens[22]);
				assert.Equal("12", tokens[23]);
				assert.Equal("and", tokens[24]);
				assert.Equal("Nº.", tokens[25]);
				assert.Equal("13.", tokens[26]);
				assert.Equal(",", tokens[27]);
				assert.Equal("pp.", tokens[28]);
				assert.Equal("17-18", tokens[29]);
				assert.Equal(".", tokens[30]);
		}

		@Test
		public void englishTokenizerCanGuessWhetherIIsAbbrev () {
				DerekoDfaTokenizer_en tok = new DerekoDfaTokenizer_en();
				tokens = tokenize(dat, w, "M. I. Baxter was born during World War I. So was I. He went to the Peter I. Hardy school. So did I.")
				assert.Equal("I.", tokens[1]);
				assert.Equal("I", tokens[8]);
				assert.Equal(".", tokens[9]);
				assert.Equal("I", tokens[12]);
				assert.Equal(".", tokens[13]);
		}

		@Test
		public void testZipOuputArchive () {

				final ByteArrayOutputStream clearOut = new ByteArrayOutputStream();
				System.setOut(new PrintStream(clearOut));
				tokens = tokenize(dat, w, "Archive:  ich/bin/ein.zip\n")
				assert.Equal(0, len(tokens));
		}
	*/
	/*

		@Test
		public void testTextBreakOutputArchive () throws InstantiationException, IllegalAccessException, ClassNotFoundException {
				DerekoDfaTokenizer_de tok = (DerekoDfaTokenizer_de) new KorapTokenizer.Builder()
								.tokenizerClassName(DerekoDfaTokenizer_de.class.getName())
								.printOffsets(true)
								.build();
				Span[] tokens = tok.tokenizePos("Text1\004\nText2 Hallo\004Rumsdibums\004Das freut mich sehr.\n");
				assert.Equal("Text1", tokens[0].getType());
				assert.Equal(len(tokens), 9 );
		}
	*/
}

func TestDoubleArrayFullTokenizerSentenceSplitterBug1(t *testing.T) {
	assert := assert.New(t)

	if dat == nil {
		dat = LoadDatokFile("testdata/tokenizer.datok")
	}

	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	var sentences []string

	text := `Wüllersdorf war aufgestanden. »Ich finde es furchtbar, daß Sie recht haben, aber Sie haben recht. Ich quäle Sie nicht länger mit meinem 'Muß es sein?'. Die Welt ist einmal, wie sie ist, und die Dinge verlaufen nicht, wie wir wollen, sondern wie die andern wollen. Das mit dem 'Gottesgericht', wie manche hochtrabend versichern, ist freilich ein Unsinn, nichts davon, umgekehrt, unser Ehrenkultus ist ein Götzendienst, aber wir müssen uns ihm unterwerfen, solange der Götze gilt.«`

	w.Reset()
	assert.True(dat.Transduce(strings.NewReader(text), w))
	sentences = strings.Split(w.String(), "\n\n")
	assert.Equal(len(sentences), 6)
	assert.Equal("Wüllersdorf\nwar\naufgestanden\n.", sentences[0])
	assert.Equal("»\nIch\nfinde\nes\nfurchtbar\n,\ndaß\nSie\nrecht\nhaben\n,\naber\nSie\nhaben\nrecht\n.", sentences[1])
	assert.Equal("Ich\nquäle\nSie\nnicht\nlänger\nmit\nmeinem\n'\nMuß\nes\nsein\n?\n'\n.", sentences[2])
	assert.Equal("Die\nWelt\nist\neinmal\n,\nwie\nsie\nist\n,\nund\ndie\nDinge\nverlaufen\nnicht\n,\nwie\nwir\nwollen\n,\nsondern\nwie\ndie\nandern\nwollen\n.", sentences[3])
	assert.Equal("Das\nmit\ndem\n'\nGottesgericht\n'\n,\nwie\nmanche\nhochtrabend\nversichern\n,\nist\nfreilich\nein\nUnsinn\n,\nnichts\ndavon\n,\numgekehrt\n,\nunser\nEhrenkultus\nist\nein\nGötzendienst\n,\naber\nwir\nmüssen\nuns\nihm\nunterwerfen\n,\nsolange\nder\nGötze\ngilt\n.\n«", sentences[4])
}

func TestDoubleArrayLoadFactor1(t *testing.T) {
	assert := assert.New(t)
	tok := LoadFomaFile("testdata/abbr_bench.fst")
	dat := tok.ToDoubleArray()
	assert.True(dat.LoadFactor() > 88)
}

func TestDoubleArrayFullTokenizerXML(t *testing.T) {
	assert := assert.New(t)

	if dat == nil {
		dat = LoadDatokFile("testdata/tokenizer.datok")
	}

	assert.NotNil(dat)

	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	var tokens []string

	tokens = ttokenize(dat, w, "Das <b>beste</b> Fußballspiel")
	assert.Equal("Das", tokens[0])
	assert.Equal("<b>", tokens[1])
	assert.Equal("beste", tokens[2])
	assert.Equal("</b>", tokens[3])
	assert.Equal("Fußballspiel", tokens[4])
	assert.Equal(5, len(tokens))

	tokens = ttokenize(dat, w, "Das <b class=\"c\">beste</b> Fußballspiel")
	assert.Equal("Das", tokens[0])
	assert.Equal("<b class=\"c\">", tokens[1])
	assert.Equal("beste", tokens[2])
	assert.Equal("</b>", tokens[3])
	assert.Equal("Fußballspiel", tokens[4])
	assert.Equal(5, len(tokens))

	tokens = ttokenize(dat, w, "der<x  y=\"alte \"> <x x> alte</x> etc. et. Mann.")
	assert.Equal("der", tokens[0])
	assert.Equal("<x  y=\"alte \">", tokens[1])
	assert.Equal("<x x>", tokens[2])
	assert.Equal("alte", tokens[3])
	assert.Equal("</x>", tokens[4])
	assert.Equal("etc.", tokens[5])
	assert.Equal("et", tokens[6])
	assert.Equal(".", tokens[7])
	assert.Equal("Mann", tokens[8])
	assert.Equal(".", tokens[9])
	assert.Equal(10, len(tokens))
}

func BenchmarkDoubleArrayTransduce(b *testing.B) {
	bu := make([]byte, 0, 2048)
	w := bytes.NewBuffer(bu)

	s := `Der Vorsitzende der Abk. hat gewählt. Gefunden auf wikipedia.org. Ich bin unter korap@ids-mannheim.de erreichbar.
	Unsere Website ist https://korap.ids-mannheim.de/?q=Baum. Unser Server ist 10.0.10.51. Zu 50.4% ist es sicher.
	Der Termin ist am 5.9.2018.
	Ich habe die readme.txt heruntergeladen.
	Ausschalten!!! Hast Du nicht gehört???
	Ich wohne in der Weststr. und Du? Kupietz und Schmidt [2018]: Korpuslinguistik. Dieses verf***** Kleid! Ich habe die readme.txt heruntergeladen.
	Er sagte: \"Es geht mir gut!\", daraufhin ging er. &quot;Das ist von C&A!&quot; Früher bzw. später ... Sie erreichte den 1. Platz!
	Archive:  Ich bin kein zip. D'dorf Ku'damm Lu'hafen M'gladbach W'schaft.
	Mach's macht's was'n ist's haste willste kannste biste kriegste.`
	r := strings.NewReader(s)

	dat := LoadDatokFile("testdata/tokenizer.datok")

	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		w.Reset()
		r.Reset(s)
		ok := dat.Transduce(r, w)
		if !ok {
			fmt.Println("Fail!")
			fmt.Println(w.String())
			os.Exit(1)
		}
	}
}

// This test is deprecated as the datok file changes over time
func XBenchmarkLoadDatokFile(b *testing.B) {
	for i := 0; i < b.N; i++ {
		dat := LoadDatokFile("testdata/tokenizer.datok")
		if dat == nil {
			fmt.Println("Fail!")
			os.Exit(1)
		}
	}
}

func BenchmarkDoubleArrayConstruction(b *testing.B) {
	tok := LoadFomaFile("testdata/simple_bench.fst")
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		dat := tok.ToDoubleArray()
		if dat == nil {
			fmt.Println("Fail!")
			os.Exit(1)
		}
	}
}

func BenchmarkDoubleArrayLarger(b *testing.B) {
	tok := LoadFomaFile("testdata/abbr_bench.fst")
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		dat := tok.ToDoubleArray()
		if dat == nil {
			fmt.Println("Fail!")
			os.Exit(1)
		}
	}
}

// 2021-08-11 (go 1.16)
// go test -bench=. -test.benchmem
//   BenchmarkTransduce-4         19069             60609 ns/op           11048 B/op        137 allocs/op
// 2021-08-12 (go 1.16)
//   BenchmarkTransduce-4         20833             55241 ns/op            9676 B/op          3 allocs/op
//   BenchmarkLoadDatokFile-4         4         258418169 ns/op        29916470 B/op       5697 allocs/op
//   BenchmarkTransduce-4         19430             58133 ns/op           18696 B/op          3 allocs/op
//   BenchmarkLoadDatokFile-4         8         139071939 ns/op       203158377 B/op       5742 allocs/op
// 2021-08-16
//   BenchmarkTransduce-4               22251             49989 ns/op           17370 B/op          3 allocs/op
//   BenchmarkLoadDatokFile-4               8         138937532 ns/op        203158327 B/op      5742 allocs/op
//   BenchmarkTransduce-4               22005             48665 ns/op           17472 B/op          3 allocs/op
//   BenchmarkLoadDatokFile-4               7         143143934 ns/op        203158450 B/op      5743 allocs/op
//   BenchmarkTransduce-4               34939             34363 ns/op           14056 B/op          3 allocs/op
//   BenchmarkLoadDatokFile-4               7         149511609 ns/op        203217193 B/op      5915 allocs/op
// 2021-08-17
//   BenchmarkTransduce-4               31204             32678 ns/op           14752 B/op          3 allocs/op
//   BenchmarkToDoubleArray-4           44138             26850 ns/op           10704 B/op         29 allocs/op
//   BenchmarkTransduce-4               29376             34562 ns/op           15157 B/op          3 allocs/op
//   BenchmarkToDoubleArray-4           54441             21355 ns/op           10704 B/op         29 allocs/op
// 2021-09-02 - New tokenizer - fixed loading
//   BenchmarkTransduce-4                       40149             31515 ns/op            8240 B/op          3 allocs/op
//   BenchmarkToDoubleArray-4                   51043             22586 ns/op           10702 B/op         29 allocs/op
//   BenchmarkToDoubleArrayLarger-4                 3         396009639 ns/op         6352293 B/op       2575 allocs/op
//   BenchmarkTransduce-4                       38698             31900 ns/op            8240 B/op          3 allocs/op
//   BenchmarkToDoubleArray-4                   50644             21569 ns/op           11151 B/op         14 allocs/op
//   BenchmarkToDoubleArrayLarger-4                 3         441260766 ns/op         6942336 B/op         30 allocs/op
//   BenchmarkTransduce-4                       39966             30835 ns/op            8240 B/op          3 allocs/op
//   BenchmarkToDoubleArray-4                   50720             24863 ns/op           11091 B/op         46 allocs/op
//   BenchmarkToDoubleArrayLarger-4                 3         432523828 ns/op         6413381 B/op       5122 allocs/op
// 2021-09-02 - xCheckSkip() with .9
//   BenchmarkTransduce-4                       36325             38501 ns/op            8240 B/op          3 allocs/op
//   BenchmarkToDoubleArray-4                   66858             19286 ns/op           10607 B/op         29 allocs/op
//   BenchmarkToDoubleArrayLarger-4                18          67428011 ns/op         6360604 B/op       2578 allocs/op
// 2021-09-02 - xCheckSkipNiu() with .9 and >= 3
//   BenchmarkTransduce-4                       37105             27714 ns/op            8240 B/op          3 allocs/op
//   BenchmarkToDoubleArray-4                   76600             15973 ns/op           10703 B/op         29 allocs/op
//   BenchmarkToDoubleArrayLarger-4                21          55161934 ns/op         6357889 B/op       2578 allocs/op
// 2021-09-30 - Go 1.17.1
//   BenchmarkTransduce-4                       47222             25962 ns/op            8240 B/op          3 allocs/op
//   BenchmarkToDoubleArray-4                   69192             17355 ns/op           10704 B/op         29 allocs/op
//   BenchmarkToDoubleArrayLarger-4                16          65042885 ns/op         6357794 B/op       2576 allocs/op
//   BenchmarkTransduceMatrix-4                 45404             25156 ns/op            8240 B/op          3 allocs/op
// 2021-10-02
//   BenchmarkTransduce-4                       47676             25398 ns/op            8240 B/op          3 allocs/op
//   BenchmarkToDoubleArray-4                   71919             16083 ns/op           10702 B/op         29 allocs/op
//   BenchmarkToDoubleArrayLarger-4                16          68012819 ns/op         6357920 B/op       2578 allocs/op
//   BenchmarkTransduceMatrix-4                 51529             23678 ns/op            8240 B/op          3 allocs/op
// 2021-10-12 - Introduction of Callbacks in Matrix
//   BenchmarkTransduce-4                       46947             26043 ns/op            8240 B/op          3 allocs/op
//   BenchmarkToDoubleArray-4                   65192             16501 ns/op           10703 B/op         29 allocs/op
//   BenchmarkToDoubleArrayLarger-4                15          69263576 ns/op         6357859 B/op       2577 allocs/op
//   BenchmarkTransduceMatrix-4                 49928             26313 ns/op           12408 B/op          6 allocs/op
// 2021-10-18 - Introduction of Callbacks in DA
//   BenchmarkTransduce-4                       41055             30058 ns/op           12408 B/op          6 allocs/op
//   BenchmarkToDoubleArray-4                   64672             17659 ns/op           10703 B/op         29 allocs/op
//   BenchmarkToDoubleArrayLarger-4                15          71640553 ns/op         6357865 B/op       2577 allocs/op
//   BenchmarkTransduceMatrix-4                 47036             26009 ns/op           12408 B/op          6 allocs/op
// 2021-10-21 - Simplify DA code to ignore final states
//   BenchmarkTransduce-4                       41365             33766 ns/op           12408 B/op          6 allocs/op
//   BenchmarkToDoubleArray-4                   63663             17675 ns/op           10703 B/op         29 allocs/op
//   BenchmarkToDoubleArrayLarger-4                16          83535733 ns/op         6357874 B/op       2577 allocs/op
//   BenchmarkTransduceMatrix-4                 45362             25258 ns/op           12408 B/op          6 allocs/op
// 2021-10-22 - Introduxe EOT
//   BenchmarkDoubleArrayTransduce-4            43820             27661 ns/op           12408 B/op          6 allocs/op
//   BenchmarkDoubleArrayConstruction-4         68259             16608 ns/op           10703 B/op         29 allocs/op
//   BenchmarkDoubleArrayLarger-4                  16          69889532 ns/op         6357901 B/op       2578 allocs/op
//   BenchmarkMatrixTransduce-4                 49426             25105 ns/op           12408 B/op          6 allocs/op
// 2021-10-23 - Improve offset handling
//   BenchmarkDoubleArrayTransduce-4            41890             29729 ns/op           12408 B/op          6 allocs/op
//   BenchmarkDoubleArrayConstruction-4         74510             15879 ns/op           10703 B/op         29 allocs/op
//   BenchmarkDoubleArrayLarger-4                  18          73752383 ns/op         6357956 B/op       2579 allocs/op
//   BenchmarkMatrixTransduce-4                 46870             27140 ns/op           12408 B/op          6 allocs/op
// 2021-10-28 - Finalize feature compatibility with KorAP-Tokenizer
//   BenchmarkDoubleArrayTransduce-4            39130             31612 ns/op           28944 B/op         16 allocs/op
//   BenchmarkDoubleArrayConstruction-4         79302             14994 ns/op           10703 B/op         29 allocs/op
//   BenchmarkDoubleArrayLarger-4                  18          67942077 ns/op         6357870 B/op       2577 allocs/op
//   BenchmarkMatrixTransduce-4                 39536             30510 ns/op           28944 B/op         16 allocs/op
// 2021-11-09 - go 1.17.3
//   BenchmarkDoubleArrayTransduce-4            35067             34192 ns/op           28944 B/op         17 allocs/op
//   BenchmarkDoubleArrayConstruction-4         72446             15614 ns/op           10703 B/op         29 allocs/op
//   BenchmarkDoubleArrayLarger-4                  16          71058822 ns/op         6357860 B/op       2577 allocs/op
//   BenchmarkMatrixTransduce-4                 36703             31891 ns/op           28944 B/op         17 allocs/op
// 2021-11-10 - rearranged longest match operator
//   BenchmarkDoubleArrayTransduce-4            34522	             33210 ns/op          28944 B/op	      17 allocs/op
//   BenchmarkDoubleArrayConstruction-4         66990              16012 ns/op          10703 B/op	      29 allocs/op
//   BenchmarkDoubleArrayLarger-4                  16           62829878 ns/op        6357823 B/op	    2576 allocs/op
//   BenchmarkMatrixTransduce-4                 36154              32702 ns/op          28944 B/op	      17 allocs/op
// 2021-12-04 - optimize identity branch
//   BenchmarkDoubleArrayTransduce-4            34903             32255 ns/op           28944 B/op         17 allocs/op
//   BenchmarkDoubleArrayConstruction-4         79394             14561 ns/op           10703 B/op         29 allocs/op
//   BenchmarkDoubleArrayLarger-4                  19          60257675 ns/op         6357911 B/op       2577 allocs/op
//   BenchmarkMatrixTransduce-4                 35076             30581 ns/op           28944 B/op         17 allocs/op
// 2021-12-05 - init identity for sigma < 256
//   BenchmarkDoubleArrayTransduce-4            35284             31918 ns/op           28944 B/op         17 allocs/op
//   BenchmarkDoubleArrayConstruction-4         80342             14504 ns/op           10703 B/op         29 allocs/op
//   BenchmarkDoubleArrayLarger-4                  19          60343253 ns/op         6357789 B/op       2575 allocs/op
//   BenchmarkMatrixTransduce-4                 34029             30238 ns/op           28944 B/op         17 allocs/op