internal/language/lookup_test.go - text - Git at Google

 // Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.

 package language

 import (
 	"testing"

 	"golang.org/x/text/internal/tag"
 )

 func b(s string) []byte {
 	return []byte(s)
 }

 func TestLangID(t *testing.T) {
 	tests := []struct {
 		id, bcp47, iso3, norm string
 		err                   error
 	}{
 		{id: "", bcp47: "und", iso3: "und", err: ErrSyntax},
 		{id: "  ", bcp47: "und", iso3: "und", err: ErrSyntax},
 		{id: "   ", bcp47: "und", iso3: "und", err: ErrSyntax},
 		{id: "    ", bcp47: "und", iso3: "und", err: ErrSyntax},
 		{id: "xxx", bcp47: "und", iso3: "und", err: NewValueError([]byte("xxx"))},
 		{id: "und", bcp47: "und", iso3: "und"},
 		{id: "aju", bcp47: "aju", iso3: "aju", norm: "jrb"},
 		{id: "jrb", bcp47: "jrb", iso3: "jrb"},
 		{id: "es", bcp47: "es", iso3: "spa"},
 		{id: "spa", bcp47: "es", iso3: "spa"},
 		{id: "ji", bcp47: "ji", iso3: "yid-", norm: "yi"},
 		{id: "jw", bcp47: "jw", iso3: "jav-", norm: "jv"},
 		{id: "ar", bcp47: "ar", iso3: "ara"},
 		{id: "kw", bcp47: "kw", iso3: "cor"},
 		{id: "arb", bcp47: "arb", iso3: "arb", norm: "ar"},
 		{id: "ar", bcp47: "ar", iso3: "ara"},
 		{id: "kur", bcp47: "ku", iso3: "kur"},
 		{id: "nl", bcp47: "nl", iso3: "nld"},
 		{id: "NL", bcp47: "nl", iso3: "nld"},
 		{id: "gsw", bcp47: "gsw", iso3: "gsw"},
 		{id: "gSW", bcp47: "gsw", iso3: "gsw"},
 		{id: "und", bcp47: "und", iso3: "und"},
 		{id: "sh", bcp47: "sh", iso3: "hbs", norm: "sr"},
 		{id: "hbs", bcp47: "sh", iso3: "hbs", norm: "sr"},
 		{id: "no", bcp47: "no", iso3: "nor", norm: "no"},
 		{id: "nor", bcp47: "no", iso3: "nor", norm: "no"},
 		{id: "cmn", bcp47: "cmn", iso3: "cmn", norm: "zh"},
 	}
 	for i, tt := range tests {
 		want, err := getLangID(b(tt.id))
 		if err != tt.err {
 			t.Errorf("%d:err(%s): found %q; want %q", i, tt.id, err, tt.err)
 		}
 		if err != nil {
 			continue
 		}
 		if id, _ := getLangISO2(b(tt.bcp47)); len(tt.bcp47) == 2 && want != id {
 			t.Errorf("%d:getISO2(%s): found %v; want %v", i, tt.bcp47, id, want)
 		}
 		if len(tt.iso3) == 3 {
 			if id, _ := getLangISO3(b(tt.iso3)); want != id {
 				t.Errorf("%d:getISO3(%s): found %q; want %q", i, tt.iso3, id, want)
 			}
 			if id, _ := getLangID(b(tt.iso3)); want != id {
 				t.Errorf("%d:getID3(%s): found %v; want %v", i, tt.iso3, id, want)
 			}
 		}
 		norm := want
 		if tt.norm != "" {
 			norm, _ = getLangID(b(tt.norm))
 		}
 		id, _ := normLang(want)
 		if id != norm {
 			t.Errorf("%d:norm(%s): found %v; want %v", i, tt.id, id, norm)
 		}
 		if id := want.String(); tt.bcp47 != id {
 			t.Errorf("%d:String(): found %s; want %s", i, id, tt.bcp47)
 		}
 		if id := want.ISO3(); tt.iso3[:3] != id {
 			t.Errorf("%d:iso3(): found %s; want %s", i, id, tt.iso3[:3])
 		}
 	}
 }

 func TestGrandfathered(t *testing.T) {
 	for _, tt := range []struct{ in, out string }{
 		{"art-lojban", "jbo"},
 		{"i-ami", "ami"},
 		{"i-bnn", "bnn"},
 		{"i-hak", "hak"},
 		{"i-klingon", "tlh"},
 		{"i-lux", "lb"},
 		{"i-navajo", "nv"},
 		{"i-pwn", "pwn"},
 		{"i-tao", "tao"},
 		{"i-tay", "tay"},
 		{"i-tsu", "tsu"},
 		{"no-bok", "nb"},
 		{"no-nyn", "nn"},
 		{"sgn-BE-FR", "sfb"},
 		{"sgn-BE-NL", "vgt"},
 		{"sgn-CH-DE", "sgg"},
 		{"sgn-ch-de", "sgg"},
 		{"zh-guoyu", "cmn"},
 		{"zh-hakka", "hak"},
 		{"zh-min-nan", "nan"},
 		{"zh-xiang", "hsn"},

 		// Grandfathered tags with no modern replacement will be converted as follows:
 		{"cel-gaulish", "xtg-x-cel-gaulish"},
 		{"en-GB-oed", "en-GB-oxendict"},
 		{"en-gb-oed", "en-GB-oxendict"},
 		{"i-default", "en-x-i-default"},
 		{"i-enochian", "und-x-i-enochian"},
 		{"i-mingo", "see-x-i-mingo"},
 		{"zh-min", "nan-x-zh-min"},

 		{"root", "und"},
 		{"en_US_POSIX", "en-US-u-va-posix"},
 		{"en_us_posix", "en-US-u-va-posix"},
 		{"en-us-posix", "en-US-u-va-posix"},
 	} {
 		got := Make(tt.in)
 		want := MustParse(tt.out)
 		if got != want {
 			t.Errorf("%s: got %q; want %q", tt.in, got, want)
 		}
 	}
 }

 func TestRegionID(t *testing.T) {
 	tests := []struct {
 		in, out string
 	}{
 		{"_  ", ""},
 		{"_000", ""},
 		{"419", "419"},
 		{"AA", "AA"},
 		{"ATF", "TF"},
 		{"HV", "HV"},
 		{"CT", "CT"},
 		{"DY", "DY"},
 		{"IC", "IC"},
 		{"FQ", "FQ"},
 		{"JT", "JT"},
 		{"ZZ", "ZZ"},
 		{"EU", "EU"},
 		{"QO", "QO"},
 		{"FX", "FX"},
 	}
 	for i, tt := range tests {
 		if tt.in[0] == '_' {
 			id := tt.in[1:]
 			if _, err := getRegionID(b(id)); err == nil {
 				t.Errorf("%d:err(%s): found nil; want error", i, id)
 			}
 			continue
 		}
 		want, _ := getRegionID(b(tt.in))
 		if s := want.String(); s != tt.out {
 			t.Errorf("%d:%s: found %q; want %q", i, tt.in, s, tt.out)
 		}
 		if len(tt.in) == 2 {
 			want, _ := getRegionISO2(b(tt.in))
 			if s := want.String(); s != tt.out {
 				t.Errorf("%d:getISO2(%s): found %q; want %q", i, tt.in, s, tt.out)
 			}
 		}
 	}
 }

 func TestRegionType(t *testing.T) {
 	for _, tt := range []struct {
 		r string
 		t byte
 	}{
 		{"NL", bcp47Region | ccTLD},
 		{"EU", bcp47Region | ccTLD}, // exceptionally reserved
 		{"AN", bcp47Region | ccTLD}, // transitionally reserved

 		{"DD", bcp47Region}, // deleted in ISO, deprecated in BCP 47
 		{"NT", bcp47Region}, // transitionally reserved, deprecated in BCP 47

 		{"XA", iso3166UserAssigned | bcp47Region},
 		{"ZZ", iso3166UserAssigned | bcp47Region},
 		{"AA", iso3166UserAssigned | bcp47Region},
 		{"QO", iso3166UserAssigned | bcp47Region},
 		{"QM", iso3166UserAssigned | bcp47Region},
 		{"XK", iso3166UserAssigned | bcp47Region},

 		{"CT", 0}, // deleted in ISO, not in BCP 47, canonicalized in CLDR
 	} {
 		r := MustParseRegion(tt.r)
 		if tp := r.typ(); tp != tt.t {
 			t.Errorf("Type(%s): got %x; want %x", tt.r, tp, tt.t)
 		}
 	}
 }

 func TestRegionISO3(t *testing.T) {
 	tests := []struct {
 		from, iso3, to string
 	}{
 		{"  ", "ZZZ", "ZZ"},
 		{"000", "ZZZ", "ZZ"},
 		{"AA", "AAA", ""},
 		{"CT", "CTE", ""},
 		{"DY", "DHY", ""},
 		{"EU", "QUU", ""},
 		{"HV", "HVO", ""},
 		{"IC", "ZZZ", "ZZ"},
 		{"JT", "JTN", ""},
 		{"PZ", "PCZ", ""},
 		{"QU", "QUU", "EU"},
 		{"QO", "QOO", ""},
 		{"YD", "YMD", ""},
 		{"FQ", "ATF", "TF"},
 		{"TF", "ATF", ""},
 		{"FX", "FXX", ""},
 		{"ZZ", "ZZZ", ""},
 		{"419", "ZZZ", "ZZ"},
 	}
 	for _, tt := range tests {
 		r, _ := getRegionID(b(tt.from))
 		if s := r.ISO3(); s != tt.iso3 {
 			t.Errorf("iso3(%q): found %q; want %q", tt.from, s, tt.iso3)
 		}
 		if tt.iso3 == "" {
 			continue
 		}
 		want := tt.to
 		if tt.to == "" {
 			want = tt.from
 		}
 		r, _ = getRegionID(b(want))
 		if id, _ := getRegionISO3(b(tt.iso3)); id != r {
 			t.Errorf("%s: found %q; want %q", tt.iso3, id, want)
 		}
 	}
 }

 func TestRegionM49(t *testing.T) {
 	fromTests := []struct {
 		m49 int
 		id  string
 	}{
 		{0, ""},
 		{-1, ""},
 		{1000, ""},
 		{10000, ""},

 		{001, "001"},
 		{104, "MM"},
 		{180, "CD"},
 		{230, "ET"},
 		{231, "ET"},
 		{249, "FX"},
 		{250, "FR"},
 		{276, "DE"},
 		{278, "DD"},
 		{280, "DE"},
 		{419, "419"},
 		{626, "TL"},
 		{736, "SD"},
 		{840, "US"},
 		{854, "BF"},
 		{891, "CS"},
 		{899, ""},
 		{958, "AA"},
 		{966, "QT"},
 		{967, "EU"},
 		{999, "ZZ"},
 	}
 	for _, tt := range fromTests {
 		id, err := getRegionM49(tt.m49)
 		if want, have := err != nil, tt.id == ""; want != have {
 			t.Errorf("error(%d): have %v; want %v", tt.m49, have, want)
 			continue
 		}
 		r, _ := getRegionID(b(tt.id))
 		if r != id {
 			t.Errorf("region(%d): have %s; want %s", tt.m49, id, r)
 		}
 	}

 	toTests := []struct {
 		m49 int
 		id  string
 	}{
 		{0, "000"},
 		{0, "IC"}, // Some codes don't have an ID

 		{001, "001"},
 		{104, "MM"},
 		{104, "BU"},
 		{180, "CD"},
 		{180, "ZR"},
 		{231, "ET"},
 		{250, "FR"},
 		{249, "FX"},
 		{276, "DE"},
 		{278, "DD"},
 		{419, "419"},
 		{626, "TL"},
 		{626, "TP"},
 		{729, "SD"},
 		{826, "GB"},
 		{840, "US"},
 		{854, "BF"},
 		{891, "YU"},
 		{891, "CS"},
 		{958, "AA"},
 		{966, "QT"},
 		{967, "EU"},
 		{967, "QU"},
 		{999, "ZZ"},
 		// For codes that don't have an M49 code use the replacement value,
 		// if available.
 		{854, "HV"}, // maps to Burkino Faso
 	}
 	for _, tt := range toTests {
 		r, _ := getRegionID(b(tt.id))
 		if r.M49() != tt.m49 {
 			t.Errorf("m49(%q): have %d; want %d", tt.id, r.M49(), tt.m49)
 		}
 	}
 }

 func TestRegionDeprecation(t *testing.T) {
 	tests := []struct{ in, out string }{
 		{"BU", "MM"},
 		{"BUR", "MM"},
 		{"CT", "KI"},
 		{"DD", "DE"},
 		{"DDR", "DE"},
 		{"DY", "BJ"},
 		{"FX", "FR"},
 		{"HV", "BF"},
 		{"JT", "UM"},
 		{"MI", "UM"},
 		{"NH", "VU"},
 		{"NQ", "AQ"},
 		{"PU", "UM"},
 		{"PZ", "PA"},
 		{"QU", "EU"},
 		{"RH", "ZW"},
 		{"TP", "TL"},
 		{"UK", "GB"},
 		{"VD", "VN"},
 		{"WK", "UM"},
 		{"YD", "YE"},
 		{"NL", "NL"},
 	}
 	for _, tt := range tests {
 		rIn, _ := getRegionID([]byte(tt.in))
 		rOut, _ := getRegionISO2([]byte(tt.out))
 		r := normRegion(rIn)
 		if rOut == rIn && r != 0 {
 			t.Errorf("%s: was %q; want %q", tt.in, r, tt.in)
 		}
 		if rOut != rIn && r != rOut {
 			t.Errorf("%s: was %q; want %q", tt.in, r, tt.out)
 		}

 	}
 }

 func TestGetScriptID(t *testing.T) {
 	idx := tag.Index("0000BbbbDdddEeeeZzzz\xff\xff\xff\xff")
 	tests := []struct {
 		in  string
 		out Script
 	}{
 		{"    ", 0},
 		{"      ", 0},
 		{"  ", 0},
 		{"", 0},
 		{"Aaaa", 0},
 		{"Bbbb", 1},
 		{"Dddd", 2},
 		{"dddd", 2},
 		{"dDDD", 2},
 		{"Eeee", 3},
 		{"Zzzz", 4},
 	}
 	for i, tt := range tests {
 		if id, err := getScriptID(idx, b(tt.in)); id != tt.out {
 			t.Errorf("%d:%s: found %d; want %d", i, tt.in, id, tt.out)
 		} else if id == 0 && err == nil {
 			t.Errorf("%d:%s: no error; expected one", i, tt.in)
 		}
 	}
 }

 func TestIsPrivateUse(t *testing.T) {
 	type test struct {
 		s       string
 		private bool
 	}
 	tests := []test{
 		{"en", false},
 		{"und", false},
 		{"pzn", false},
 		{"qaa", true},
 		{"qtz", true},
 		{"qua", false},
 	}
 	for i, tt := range tests {
 		x, _ := getLangID([]byte(tt.s))
 		if b := x.IsPrivateUse(); b != tt.private {
 			t.Errorf("%d: langID.IsPrivateUse(%s) was %v; want %v", i, tt.s, b, tt.private)
 		}
 	}
 	tests = []test{
 		{"001", false},
 		{"419", false},
 		{"899", false},
 		{"900", false},
 		{"957", false},
 		{"958", true},
 		{"AA", true},
 		{"AC", false},
 		{"EU", false}, // CLDR grouping, exceptionally reserved in ISO.
 		{"QU", true},  // Canonicalizes to EU, User-assigned in ISO.
 		{"QO", true},  // CLDR grouping, User-assigned in ISO.
 		{"QA", false},
 		{"QM", true},
 		{"QZ", true},
 		{"XA", true},
 		{"XK", true}, // Assigned to Kosovo in CLDR, User-assigned in ISO.
 		{"XZ", true},
 		{"ZW", false},
 		{"ZZ", true},
 	}
 	for i, tt := range tests {
 		x, _ := getRegionID([]byte(tt.s))
 		if b := x.IsPrivateUse(); b != tt.private {
 			t.Errorf("%d: regionID.IsPrivateUse(%s) was %v; want %v", i, tt.s, b, tt.private)
 		}
 	}
 	tests = []test{
 		{"Latn", false},
 		{"Laaa", false}, // invalid
 		{"Qaaa", true},
 		{"Qabx", true},
 		{"Qaby", false},
 		{"Zyyy", false},
 		{"Zzzz", false},
 	}
 	for i, tt := range tests {
 		x, _ := getScriptID(script, []byte(tt.s))
 		if b := x.IsPrivateUse(); b != tt.private {
 			t.Errorf("%d: scriptID.IsPrivateUse(%s) was %v; want %v", i, tt.s, b, tt.private)
 		}
 	}
 }
	// Copyright 2013 The Go Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file.

	package language

	import (
	"testing"

	"golang.org/x/text/internal/tag"
	)

	func b(s string) []byte {
	return []byte(s)
	}

	func TestLangID(t *testing.T) {
	tests := []struct {
	id, bcp47, iso3, norm string
	err error
	}{
	{id: "", bcp47: "und", iso3: "und", err: ErrSyntax},
	{id: " ", bcp47: "und", iso3: "und", err: ErrSyntax},
	{id: " ", bcp47: "und", iso3: "und", err: ErrSyntax},
	{id: " ", bcp47: "und", iso3: "und", err: ErrSyntax},
	{id: "xxx", bcp47: "und", iso3: "und", err: NewValueError([]byte("xxx"))},
	{id: "und", bcp47: "und", iso3: "und"},
	{id: "aju", bcp47: "aju", iso3: "aju", norm: "jrb"},
	{id: "jrb", bcp47: "jrb", iso3: "jrb"},
	{id: "es", bcp47: "es", iso3: "spa"},
	{id: "spa", bcp47: "es", iso3: "spa"},
	{id: "ji", bcp47: "ji", iso3: "yid-", norm: "yi"},
	{id: "jw", bcp47: "jw", iso3: "jav-", norm: "jv"},
	{id: "ar", bcp47: "ar", iso3: "ara"},
	{id: "kw", bcp47: "kw", iso3: "cor"},
	{id: "arb", bcp47: "arb", iso3: "arb", norm: "ar"},
	{id: "ar", bcp47: "ar", iso3: "ara"},
	{id: "kur", bcp47: "ku", iso3: "kur"},
	{id: "nl", bcp47: "nl", iso3: "nld"},
	{id: "NL", bcp47: "nl", iso3: "nld"},
	{id: "gsw", bcp47: "gsw", iso3: "gsw"},
	{id: "gSW", bcp47: "gsw", iso3: "gsw"},
	{id: "und", bcp47: "und", iso3: "und"},
	{id: "sh", bcp47: "sh", iso3: "hbs", norm: "sr"},
	{id: "hbs", bcp47: "sh", iso3: "hbs", norm: "sr"},
	{id: "no", bcp47: "no", iso3: "nor", norm: "no"},
	{id: "nor", bcp47: "no", iso3: "nor", norm: "no"},
	{id: "cmn", bcp47: "cmn", iso3: "cmn", norm: "zh"},
	}
	for i, tt := range tests {
	want, err := getLangID(b(tt.id))
	if err != tt.err {
	t.Errorf("%d:err(%s): found %q; want %q", i, tt.id, err, tt.err)
	}
	if err != nil {
	continue
	}
	if id, _ := getLangISO2(b(tt.bcp47)); len(tt.bcp47) == 2 && want != id {
	t.Errorf("%d:getISO2(%s): found %v; want %v", i, tt.bcp47, id, want)
	}
	if len(tt.iso3) == 3 {
	if id, _ := getLangISO3(b(tt.iso3)); want != id {
	t.Errorf("%d:getISO3(%s): found %q; want %q", i, tt.iso3, id, want)
	}
	if id, _ := getLangID(b(tt.iso3)); want != id {
	t.Errorf("%d:getID3(%s): found %v; want %v", i, tt.iso3, id, want)
	}
	}
	norm := want
	if tt.norm != "" {
	norm, _ = getLangID(b(tt.norm))
	}
	id, _ := normLang(want)
	if id != norm {
	t.Errorf("%d:norm(%s): found %v; want %v", i, tt.id, id, norm)
	}
	if id := want.String(); tt.bcp47 != id {
	t.Errorf("%d:String(): found %s; want %s", i, id, tt.bcp47)
	}
	if id := want.ISO3(); tt.iso3[:3] != id {
	t.Errorf("%d:iso3(): found %s; want %s", i, id, tt.iso3[:3])
	}
	}
	}

	func TestGrandfathered(t *testing.T) {
	for _, tt := range []struct{ in, out string }{
	{"art-lojban", "jbo"},
	{"i-ami", "ami"},
	{"i-bnn", "bnn"},
	{"i-hak", "hak"},
	{"i-klingon", "tlh"},
	{"i-lux", "lb"},
	{"i-navajo", "nv"},
	{"i-pwn", "pwn"},
	{"i-tao", "tao"},
	{"i-tay", "tay"},
	{"i-tsu", "tsu"},
	{"no-bok", "nb"},
	{"no-nyn", "nn"},
	{"sgn-BE-FR", "sfb"},
	{"sgn-BE-NL", "vgt"},
	{"sgn-CH-DE", "sgg"},
	{"sgn-ch-de", "sgg"},
	{"zh-guoyu", "cmn"},
	{"zh-hakka", "hak"},
	{"zh-min-nan", "nan"},
	{"zh-xiang", "hsn"},

	// Grandfathered tags with no modern replacement will be converted as follows:
	{"cel-gaulish", "xtg-x-cel-gaulish"},
	{"en-GB-oed", "en-GB-oxendict"},
	{"en-gb-oed", "en-GB-oxendict"},
	{"i-default", "en-x-i-default"},
	{"i-enochian", "und-x-i-enochian"},
	{"i-mingo", "see-x-i-mingo"},
	{"zh-min", "nan-x-zh-min"},

	{"root", "und"},
	{"en_US_POSIX", "en-US-u-va-posix"},
	{"en_us_posix", "en-US-u-va-posix"},
	{"en-us-posix", "en-US-u-va-posix"},
	} {
	got := Make(tt.in)
	want := MustParse(tt.out)
	if got != want {
	t.Errorf("%s: got %q; want %q", tt.in, got, want)
	}
	}
	}

	func TestRegionID(t *testing.T) {
	tests := []struct {
	in, out string
	}{
	{"_ ", ""},
	{"_000", ""},
	{"419", "419"},
	{"AA", "AA"},
	{"ATF", "TF"},
	{"HV", "HV"},
	{"CT", "CT"},
	{"DY", "DY"},
	{"IC", "IC"},
	{"FQ", "FQ"},
	{"JT", "JT"},
	{"ZZ", "ZZ"},
	{"EU", "EU"},
	{"QO", "QO"},
	{"FX", "FX"},
	}
	for i, tt := range tests {
	if tt.in[0] == '_' {
	id := tt.in[1:]
	if _, err := getRegionID(b(id)); err == nil {
	t.Errorf("%d:err(%s): found nil; want error", i, id)
	}
	continue
	}
	want, _ := getRegionID(b(tt.in))
	if s := want.String(); s != tt.out {
	t.Errorf("%d:%s: found %q; want %q", i, tt.in, s, tt.out)
	}
	if len(tt.in) == 2 {
	want, _ := getRegionISO2(b(tt.in))
	if s := want.String(); s != tt.out {
	t.Errorf("%d:getISO2(%s): found %q; want %q", i, tt.in, s, tt.out)
	}
	}
	}
	}

	func TestRegionType(t *testing.T) {
	for _, tt := range []struct {
	r string
	t byte
	}{
	{"NL", bcp47Region \| ccTLD},
	{"EU", bcp47Region \| ccTLD}, // exceptionally reserved
	{"AN", bcp47Region \| ccTLD}, // transitionally reserved

	{"DD", bcp47Region}, // deleted in ISO, deprecated in BCP 47
	{"NT", bcp47Region}, // transitionally reserved, deprecated in BCP 47

	{"XA", iso3166UserAssigned \| bcp47Region},
	{"ZZ", iso3166UserAssigned \| bcp47Region},
	{"AA", iso3166UserAssigned \| bcp47Region},
	{"QO", iso3166UserAssigned \| bcp47Region},
	{"QM", iso3166UserAssigned \| bcp47Region},
	{"XK", iso3166UserAssigned \| bcp47Region},

	{"CT", 0}, // deleted in ISO, not in BCP 47, canonicalized in CLDR
	} {
	r := MustParseRegion(tt.r)
	if tp := r.typ(); tp != tt.t {
	t.Errorf("Type(%s): got %x; want %x", tt.r, tp, tt.t)
	}
	}
	}

	func TestRegionISO3(t *testing.T) {
	tests := []struct {
	from, iso3, to string
	}{
	{" ", "ZZZ", "ZZ"},
	{"000", "ZZZ", "ZZ"},
	{"AA", "AAA", ""},
	{"CT", "CTE", ""},
	{"DY", "DHY", ""},
	{"EU", "QUU", ""},
	{"HV", "HVO", ""},
	{"IC", "ZZZ", "ZZ"},
	{"JT", "JTN", ""},
	{"PZ", "PCZ", ""},
	{"QU", "QUU", "EU"},
	{"QO", "QOO", ""},
	{"YD", "YMD", ""},
	{"FQ", "ATF", "TF"},
	{"TF", "ATF", ""},
	{"FX", "FXX", ""},
	{"ZZ", "ZZZ", ""},
	{"419", "ZZZ", "ZZ"},
	}
	for _, tt := range tests {
	r, _ := getRegionID(b(tt.from))
	if s := r.ISO3(); s != tt.iso3 {
	t.Errorf("iso3(%q): found %q; want %q", tt.from, s, tt.iso3)
	}
	if tt.iso3 == "" {
	continue
	}
	want := tt.to
	if tt.to == "" {
	want = tt.from
	}
	r, _ = getRegionID(b(want))
	if id, _ := getRegionISO3(b(tt.iso3)); id != r {
	t.Errorf("%s: found %q; want %q", tt.iso3, id, want)
	}
	}
	}

	func TestRegionM49(t *testing.T) {
	fromTests := []struct {
	m49 int
	id string
	}{
	{0, ""},
	{-1, ""},
	{1000, ""},
	{10000, ""},

	{001, "001"},
	{104, "MM"},
	{180, "CD"},
	{230, "ET"},
	{231, "ET"},
	{249, "FX"},
	{250, "FR"},
	{276, "DE"},
	{278, "DD"},
	{280, "DE"},
	{419, "419"},
	{626, "TL"},
	{736, "SD"},
	{840, "US"},
	{854, "BF"},
	{891, "CS"},
	{899, ""},
	{958, "AA"},
	{966, "QT"},
	{967, "EU"},
	{999, "ZZ"},
	}
	for _, tt := range fromTests {
	id, err := getRegionM49(tt.m49)
	if want, have := err != nil, tt.id == ""; want != have {
	t.Errorf("error(%d): have %v; want %v", tt.m49, have, want)
	continue
	}
	r, _ := getRegionID(b(tt.id))
	if r != id {
	t.Errorf("region(%d): have %s; want %s", tt.m49, id, r)
	}
	}

	toTests := []struct {
	m49 int
	id string
	}{
	{0, "000"},
	{0, "IC"}, // Some codes don't have an ID

	{001, "001"},
	{104, "MM"},
	{104, "BU"},
	{180, "CD"},
	{180, "ZR"},
	{231, "ET"},
	{250, "FR"},
	{249, "FX"},
	{276, "DE"},
	{278, "DD"},
	{419, "419"},
	{626, "TL"},
	{626, "TP"},
	{729, "SD"},
	{826, "GB"},
	{840, "US"},
	{854, "BF"},
	{891, "YU"},
	{891, "CS"},
	{958, "AA"},
	{966, "QT"},
	{967, "EU"},
	{967, "QU"},
	{999, "ZZ"},
	// For codes that don't have an M49 code use the replacement value,
	// if available.
	{854, "HV"}, // maps to Burkino Faso
	}
	for _, tt := range toTests {
	r, _ := getRegionID(b(tt.id))
	if r.M49() != tt.m49 {
	t.Errorf("m49(%q): have %d; want %d", tt.id, r.M49(), tt.m49)
	}
	}
	}

	func TestRegionDeprecation(t *testing.T) {
	tests := []struct{ in, out string }{
	{"BU", "MM"},
	{"BUR", "MM"},
	{"CT", "KI"},
	{"DD", "DE"},
	{"DDR", "DE"},
	{"DY", "BJ"},
	{"FX", "FR"},
	{"HV", "BF"},
	{"JT", "UM"},
	{"MI", "UM"},
	{"NH", "VU"},
	{"NQ", "AQ"},
	{"PU", "UM"},
	{"PZ", "PA"},
	{"QU", "EU"},
	{"RH", "ZW"},
	{"TP", "TL"},
	{"UK", "GB"},
	{"VD", "VN"},
	{"WK", "UM"},
	{"YD", "YE"},
	{"NL", "NL"},
	}
	for _, tt := range tests {
	rIn, _ := getRegionID([]byte(tt.in))
	rOut, _ := getRegionISO2([]byte(tt.out))
	r := normRegion(rIn)
	if rOut == rIn && r != 0 {
	t.Errorf("%s: was %q; want %q", tt.in, r, tt.in)
	}
	if rOut != rIn && r != rOut {
	t.Errorf("%s: was %q; want %q", tt.in, r, tt.out)
	}

	}
	}

	func TestGetScriptID(t *testing.T) {
	idx := tag.Index("0000BbbbDdddEeeeZzzz\xff\xff\xff\xff")
	tests := []struct {
	in string
	out Script
	}{
	{" ", 0},
	{" ", 0},
	{" ", 0},
	{"", 0},
	{"Aaaa", 0},
	{"Bbbb", 1},
	{"Dddd", 2},
	{"dddd", 2},
	{"dDDD", 2},
	{"Eeee", 3},
	{"Zzzz", 4},
	}
	for i, tt := range tests {
	if id, err := getScriptID(idx, b(tt.in)); id != tt.out {
	t.Errorf("%d:%s: found %d; want %d", i, tt.in, id, tt.out)
	} else if id == 0 && err == nil {
	t.Errorf("%d:%s: no error; expected one", i, tt.in)
	}
	}
	}

	func TestIsPrivateUse(t *testing.T) {
	type test struct {
	s string
	private bool
	}
	tests := []test{
	{"en", false},
	{"und", false},
	{"pzn", false},
	{"qaa", true},
	{"qtz", true},
	{"qua", false},
	}
	for i, tt := range tests {
	x, _ := getLangID([]byte(tt.s))
	if b := x.IsPrivateUse(); b != tt.private {
	t.Errorf("%d: langID.IsPrivateUse(%s) was %v; want %v", i, tt.s, b, tt.private)
	}
	}
	tests = []test{
	{"001", false},
	{"419", false},
	{"899", false},
	{"900", false},
	{"957", false},
	{"958", true},
	{"AA", true},
	{"AC", false},
	{"EU", false}, // CLDR grouping, exceptionally reserved in ISO.
	{"QU", true}, // Canonicalizes to EU, User-assigned in ISO.
	{"QO", true}, // CLDR grouping, User-assigned in ISO.
	{"QA", false},
	{"QM", true},
	{"QZ", true},
	{"XA", true},
	{"XK", true}, // Assigned to Kosovo in CLDR, User-assigned in ISO.
	{"XZ", true},
	{"ZW", false},
	{"ZZ", true},
	}
	for i, tt := range tests {
	x, _ := getRegionID([]byte(tt.s))
	if b := x.IsPrivateUse(); b != tt.private {
	t.Errorf("%d: regionID.IsPrivateUse(%s) was %v; want %v", i, tt.s, b, tt.private)
	}
	}
	tests = []test{
	{"Latn", false},
	{"Laaa", false}, // invalid
	{"Qaaa", true},
	{"Qabx", true},
	{"Qaby", false},
	{"Zyyy", false},
	{"Zzzz", false},
	}
	for i, tt := range tests {
	x, _ := getScriptID(script, []byte(tt.s))
	if b := x.IsPrivateUse(); b != tt.private {
	t.Errorf("%d: scriptID.IsPrivateUse(%s) was %v; want %v", i, tt.s, b, tt.private)
	}
	}
	}