// Copyright 2016 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 plural
import (
"fmt"
"reflect"
"strconv"
"strings"
"testing"
"golang.org/x/text/language"
)
func TestGetIntApprox(t *testing.T) {
const big = 1234567890
testCases := []struct {
digits string
start int
end int
nMod int
want int
}{
{"123", 0, 1, 1, 1},
{"123", 0, 2, 1, big},
{"123", 0, 2, 2, 12},
{"123", 3, 4, 2, 0},
{"12345", 3, 4, 2, 4},
{"40", 0, 1, 2, 4},
{"1", 0, 7, 2, big},
{"123", 0, 5, 2, big},
{"123", 0, 5, 3, big},
{"123", 0, 5, 4, big},
{"123", 0, 5, 5, 12300},
{"123", 0, 5, 6, 12300},
{"123", 0, 5, 7, 12300},
// Translation of examples in MatchDigits.
// Integer parts
{"123", 0, 3, 3, 123}, // 123
{"1234", 0, 3, 3, 123}, // 123.4
{"1", 0, 6, 8, 100000}, // 100000
// Fraction parts
{"123", 3, 3, 3, 0}, // 123
{"1234", 3, 4, 3, 4}, // 123.4
{"1234", 3, 5, 3, 40}, // 123.40
{"1", 6, 8, 8, 0}, // 100000.00
}
for _, tc := range testCases {
t.Run(fmt.Sprintf("%s:%d:%d/%d", tc.digits, tc.start, tc.end, tc.nMod), func(t *testing.T) {
got := getIntApprox(mkDigits(tc.digits), tc.start, tc.end, tc.nMod, big)
if got != tc.want {
t.Errorf("got %d; want %d", got, tc.want)
}
})
}
}
func mkDigits(s string) []byte {
b := []byte(s)
for i := range b {
b[i] -= '0'
}
return b
}
func TestValidForms(t *testing.T) {
testCases := []struct {
tag language.Tag
want []Form
}{
{language.AmericanEnglish, []Form{Other, One}},
{language.Portuguese, []Form{Other, One}},
{language.Latvian, []Form{Other, Zero, One}},
{language.Arabic, []Form{Other, Zero, One, Two, Few, Many}},
{language.Russian, []Form{Other, One, Few, Many}},
}
for _, tc := range testCases {
got := validForms(cardinal, tc.tag)
if !reflect.DeepEqual(got, tc.want) {
t.Errorf("validForms(%v): got %v; want %v", tc.tag, got, tc.want)
}
}
}
func TestOrdinal(t *testing.T) {
testPlurals(t, Ordinal, ordinalTests)
}
func TestCardinal(t *testing.T) {
testPlurals(t, Cardinal, cardinalTests)
}
func testPlurals(t *testing.T, p *Rules, testCases []pluralTest) {
for _, tc := range testCases {
for _, loc := range strings.Split(tc.locales, " ") {
tag := language.MustParse(loc)
// Test integers
for _, s := range tc.integer {
a := strings.Split(s, "~")
from := parseUint(t, a[0])
to := from
if len(a) > 1 {
to = parseUint(t, a[1])
}
for n := from; n <= to; n++ {
t.Run(fmt.Sprintf("%s/int(%d)", loc, n), func(t *testing.T) {
if f := p.matchComponents(tag, n, 0, 0); f != Form(tc.form) {
t.Errorf("matchComponents: got %v; want %v", f, Form(tc.form))
}
digits := []byte(fmt.Sprint(n))
for i := range digits {
digits[i] -= '0'
}
if f := p.MatchDigits(tag, digits, len(digits), 0); f != Form(tc.form) {
t.Errorf("MatchDigits: got %v; want %v", f, Form(tc.form))
}
})
}
}
// Test decimals
for _, s := range tc.decimal {
a := strings.Split(s, "~")
from, scale := parseFixedPoint(t, a[0])
to := from
if len(a) > 1 {
var toScale int
if to, toScale = parseFixedPoint(t, a[1]); toScale != scale {
t.Fatalf("%s:%s: non-matching scales %d versus %d", loc, s, scale, toScale)
}
}
m := 1
for i := 0; i < scale; i++ {
m *= 10
}
for n := from; n <= to; n++ {
num := fmt.Sprintf("%[1]d.%0[3]*[2]d", n/m, n%m, scale)
name := fmt.Sprintf("%s:dec(%s)", loc, num)
t.Run(name, func(t *testing.T) {
ff := n % m
tt := ff
w := scale
for tt > 0 && tt%10 == 0 {
w--
tt /= 10
}
if f := p.MatchPlural(tag, n/m, scale, w, ff, tt); f != Form(tc.form) {
t.Errorf("MatchPlural: got %v; want %v", f, Form(tc.form))
}
if f := p.matchComponents(tag, n/m, n%m, scale); f != Form(tc.form) {
t.Errorf("matchComponents: got %v; want %v", f, Form(tc.form))
}
exp := strings.IndexByte(num, '.')
digits := []byte(strings.Replace(num, ".", "", 1))
for i := range digits {
digits[i] -= '0'
}
if f := p.MatchDigits(tag, digits, exp, scale); f != Form(tc.form) {
t.Errorf("MatchDigits: got %v; want %v", f, Form(tc.form))
}
})
}
}
}
}
}
func parseUint(t *testing.T, s string) int {
val, err := strconv.ParseUint(s, 10, 32)
if err != nil {
t.Fatal(err)
}
return int(val)
}
func parseFixedPoint(t *testing.T, s string) (val, scale int) {
p := strings.Index(s, ".")
s = strings.Replace(s, ".", "", 1)
v, err := strconv.ParseUint(s, 10, 32)
if err != nil {
t.Fatal(err)
}
return int(v), len(s) - p
}
func BenchmarkPluralSimpleCases(b *testing.B) {
p := Cardinal
en := tagToID(language.English)
zh := tagToID(language.Chinese)
for i := 0; i < b.N; i++ {
matchPlural(p, en, 0, 0, 0) // 0
matchPlural(p, en, 1, 0, 0) // 1
matchPlural(p, en, 2, 12, 3) // 2.120
matchPlural(p, zh, 0, 0, 0) // 0
matchPlural(p, zh, 1, 0, 0) // 1
matchPlural(p, zh, 2, 12, 3) // 2.120
}
}
func BenchmarkPluralComplexCases(b *testing.B) {
p := Cardinal
ar := tagToID(language.Arabic)
lv := tagToID(language.Latvian)
for i := 0; i < b.N; i++ {
matchPlural(p, lv, 0, 19, 2) // 0.19
matchPlural(p, lv, 11, 0, 3) // 11.000
matchPlural(p, lv, 100, 123, 4) // 0.1230
matchPlural(p, ar, 0, 0, 0) // 0
matchPlural(p, ar, 110, 0, 0) // 110
matchPlural(p, ar, 99, 99, 2) // 99.99
}
}
