package datokenizer

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

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

func tmatch(dat *DaTokenizer, s string) bool {
	b := make([]byte, 0, 2048)
	w := bytes.NewBuffer(b)
	return dat.Transduce(strings.NewReader(s), w)
}

func ttokenize(dat *DaTokenizer, w *bytes.Buffer, str string) []string {
	w.Reset()
	ok := dat.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 TestSimpleString(t *testing.T) {
	assert := assert.New(t)

	// bau | bauamt
	tok := LoadFomaFile("testdata/bauamt.fst")
	dat := tok.ToDoubleArray()
	assert.True(tmatch(dat, "bau"))
	assert.True(tmatch(dat, "bauamt"))
	assert.False(tmatch(dat, "baum"))
}

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

	// (bau | wahl) (amt | en)
	tok := LoadFomaFile("testdata/wahlamt.fst")
	dat := tok.ToDoubleArray()
	assert.False(tmatch(dat, "bau"))
	assert.True(tmatch(dat, "bauamt"))
	assert.True(tmatch(dat, "wahlamt"))
	assert.True(tmatch(dat, "bauen"))
	assert.True(tmatch(dat, "wahlen"))
	assert.False(tmatch(dat, "baum"))
}

func TestSimpleTokenizer(t *testing.T) {
	assert := assert.New(t)
	tok := LoadFomaFile("testdata/simpletok.fst")
	dat := tok.ToDoubleArray()
	assert.True(tmatch(dat, "bau"))
	assert.True(tmatch(dat, "bad"))
	assert.True(tmatch(dat, "wald gehen"))
}

func TestSimpleTokenizerTransduce(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("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(6, len(tokens))
}

func TestReadWriteTokenizer(t *testing.T) {
	assert := assert.New(t)
	tok := LoadFomaFile("testdata/simpletok.fst")
	dat := tok.ToDoubleArray()
	assert.True(tmatch(dat, "bau"))
	assert.True(tmatch(dat, "bad"))
	assert.True(tmatch(dat, "wald gehen"))

	assert.True(dat.LoadFactor() >= 70)

	b := make([]byte, 0, 1024)
	buf := bytes.NewBuffer(b)
	n, err := dat.WriteTo(buf)
	assert.Nil(err)
	assert.Equal(int64(224), 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.True(tmatch(dat2, "bau"))
	assert.True(tmatch(dat2, "bad"))
	assert.True(tmatch(dat2, "wald gehen"))
}

func TestFullTokenizer(t *testing.T) {
	assert := assert.New(t)
	dat := LoadDatokFile("testdata/tokenizer.datok")
	assert.NotNil(dat)
	assert.True(dat.LoadFactor() >= 70)
	assert.Equal(dat.epsilon, 1)
	assert.Equal(dat.unknown, 2)
	assert.Equal(dat.identity, 3)
	assert.Equal(dat.final, 137)
	assert.Equal(len(dat.sigma), 132)
	assert.True(len(dat.array) > 3800000)
	assert.True(dat.maxSize > 3800000)

	assert.True(tmatch(dat, "bau"))
	assert.True(tmatch(dat, "bad"))
	assert.True(tmatch(dat, "wald gehen"))
}

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

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

	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", 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(8, 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", w.String())
}

func TestFullTokenizerSentenceSplitter(t *testing.T) {
	assert := assert.New(t)
	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", w.String())
	assert.Equal("Der\nalte\nMann\n.", sentences[0])
	assert.Equal("", sentences[1])
	assert.Equal(len(sentences), 2)

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

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

	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("", sentences[1])
	assert.Equal(len(sentences), 2)

	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(len(sentences), 2)
	assert.Equal("Ich\nhabe\ndie\nreadme.txt\nheruntergeladen", sentences[0])
	assert.Equal("", 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(len(sentences), 3)
	assert.Equal("Ausschalten\n!!!", sentences[0])
	assert.Equal("Hast\nDu\nnicht\ngehört\n???", sentences[1])
	assert.Equal("", 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 TestFullTokenizerTokenSplitter(t *testing.T) {
	assert := assert.New(t)
	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 BenchmarkTransduce(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")

	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)
		}
	}
	// 2021-08-11 (go 1.16)
	// go test -bench=. -test.benchmem
	//   BenchmarkTransduce-4       19069             60609 ns/op           11048 B/op        137 allocs/op
	// 2021-08-112 (go 1.16)
	//   BenchmarkTransduce-4       20833             55241 ns/op            9676 B/op          3 allocs/op
}