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// Copyright 2017 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 number
import (
"fmt"
"log"
"testing"
"golang.org/x/text/language"
)
func TestAppendDecimal(t *testing.T) {
type pairs map[string]string // alternates with decimal input and result
testCases := []struct {
pattern string
// We want to be able to test some forms of patterns that cannot be
// represented as a string.
pat *Pattern
test pairs
}{{
pattern: "0",
test: pairs{
"0": "0",
"1": "1",
"-1": "-1",
".00": "0",
"10.": "10",
"12": "12",
"1.2": "1",
"NaN": "NaN",
"-Inf": "-∞",
},
}, {
pattern: "+0;+0",
test: pairs{
"0": "+0",
"1": "+1",
"-1": "-1",
".00": "+0",
"10.": "+10",
"12": "+12",
"1.2": "+1",
"NaN": "NaN",
"-Inf": "-∞",
"Inf": "+∞",
},
}, {
pattern: "0 +;0 +",
test: pairs{
"0": "0 +",
"1": "1 +",
"-1": "1 -",
".00": "0 +",
},
}, {
pattern: "0;0-",
test: pairs{
"-1": "1-",
"NaN": "NaN",
"-Inf": "∞-",
"Inf": "∞",
},
}, {
pattern: "0000",
test: pairs{
"0": "0000",
"1": "0001",
"12": "0012",
"12345": "12345",
},
}, {
pattern: ".0",
test: pairs{
"0": ".0",
"1": "1.0",
"1.2": "1.2",
"1.2345": "1.2",
},
}, {
pattern: "#.0",
test: pairs{
"0": ".0",
},
}, {
pattern: "#.0#",
test: pairs{
"0": ".0",
"1": "1.0",
},
}, {
pattern: "0.0#",
test: pairs{
"0": "0.0",
},
}, {
pattern: "#0.###",
test: pairs{
"0": "0",
"1": "1",
"1.2": "1.2",
"1.2345": "1.234", // rounding should have been done earlier
"1234.5": "1234.5",
"1234.567": "1234.567",
},
}, {
pattern: "#0.######",
test: pairs{
"0": "0",
"1234.5678": "1234.5678",
"0.123456789": "0.123457",
"NaN": "NaN",
"Inf": "∞",
},
// Test separators.
}, {
pattern: "#,#.00",
test: pairs{
"100": "1,0,0.00",
},
}, {
pattern: "#,0.##",
test: pairs{
"10": "1,0",
},
}, {
pattern: "#,0",
test: pairs{
"10": "1,0",
},
}, {
pattern: "#,##,#.00",
test: pairs{
"1000": "1,00,0.00",
},
}, {
pattern: "#,##0.###",
test: pairs{
"0": "0",
"1234.5678": "1,234.568",
"0.123456789": "0.123",
},
}, {
pattern: "#,##,##0.###",
test: pairs{
"0": "0",
"123456789012": "1,23,45,67,89,012",
"0.123456789": "0.123",
},
}, {
pattern: "0,00,000.###",
test: pairs{
"0": "0,00,000",
"123456789012": "1,23,45,67,89,012",
"12.3456789": "0,00,012.346",
"0.123456789": "0,00,000.123",
},
// Support for ill-formed patterns.
}, {
pattern: "#",
test: pairs{
".00": "", // This is the behavior of fmt.
"0": "", // This is the behavior of fmt.
"1": "1",
"10.": "10",
},
}, {
pattern: ".#",
test: pairs{
"0": "", // This is the behavior of fmt.
"1": "1",
"1.2": "1.2",
"1.2345": "1.2",
},
}, {
pattern: "#,#.##",
test: pairs{
"10": "1,0",
},
}, {
pattern: "#,#",
test: pairs{
"10": "1,0",
},
// Special patterns
}, {
pattern: "#,max_int=2",
pat: &Pattern{
RoundingContext: RoundingContext{
MaxIntegerDigits: 2,
},
},
test: pairs{
"2017": "17",
},
}, {
pattern: "0,max_int=2",
pat: &Pattern{
RoundingContext: RoundingContext{
MaxIntegerDigits: 2,
MinIntegerDigits: 1,
},
},
test: pairs{
"2000": "0",
"2001": "1",
"2017": "17",
},
}, {
pattern: "00,max_int=2",
pat: &Pattern{
RoundingContext: RoundingContext{
MaxIntegerDigits: 2,
MinIntegerDigits: 2,
},
},
test: pairs{
"2000": "00",
"2001": "01",
"2017": "17",
},
}, {
pattern: "@@@@,max_int=2",
pat: &Pattern{
RoundingContext: RoundingContext{
MaxIntegerDigits: 2,
MinSignificantDigits: 4,
},
},
test: pairs{
"2017": "17.00",
"2000": "0.000",
"2001": "1.000",
},
// Significant digits
}, {
pattern: "@@##",
test: pairs{
"1": "1.0",
"0.1": "0.10", // leading zero does not count as significant digit
"123": "123",
"1234": "1234",
"12345": "12340",
},
}, {
pattern: "@@@@",
test: pairs{
"1": "1.000",
".1": "0.1000",
".001": "0.001000",
"123": "123.0",
"1234": "1234",
"12345": "12340", // rounding down
"NaN": "NaN",
"-Inf": "-∞",
},
// TODO: rounding
// {"@@@@": "23456": "23460"}, // rounding up
// TODO: padding
// Scientific and Engineering notation
}, {
pattern: "#E0",
test: pairs{
"0": "0\u202f×\u202f10⁰",
"1": "1\u202f×\u202f10⁰",
"123.456": "1\u202f×\u202f10²",
},
}, {
pattern: "#E+0",
test: pairs{
"0": "0\u202f×\u202f10⁺⁰",
"1000": "1\u202f×\u202f10⁺³",
"1E100": "1\u202f×\u202f10⁺¹⁰⁰",
"1E-100": "1\u202f×\u202f10⁻¹⁰⁰",
"NaN": "NaN",
"-Inf": "-∞",
},
}, {
pattern: "##0E00",
test: pairs{
"100": "100\u202f×\u202f10⁰⁰",
"12345": "12\u202f×\u202f10⁰³",
"123.456": "123\u202f×\u202f10⁰⁰",
},
}, {
pattern: "##0.###E00",
test: pairs{
"100": "100\u202f×\u202f10⁰⁰",
"12345": "12.345\u202f×\u202f10⁰³",
"123456": "123.456\u202f×\u202f10⁰³",
"123.456": "123.456\u202f×\u202f10⁰⁰",
"123.4567": "123.457\u202f×\u202f10⁰⁰",
},
}, {
pattern: "##0.000E00",
test: pairs{
"100": "100.000\u202f×\u202f10⁰⁰",
"12345": "12.345\u202f×\u202f10⁰³",
"123.456": "123.456\u202f×\u202f10⁰⁰",
"12.3456": "12.346\u202f×\u202f10⁰⁰",
},
}, {
pattern: "@@E0",
test: pairs{
"0": "0.0\u202f×\u202f10⁰",
"99": "9.9\u202f×\u202f10¹",
"0.99": "9.9\u202f×\u202f10⁻¹",
},
}, {
pattern: "@###E00",
test: pairs{
"0": "0\u202f×\u202f10⁰⁰",
"1": "1\u202f×\u202f10⁰⁰",
"11": "1.1\u202f×\u202f10⁰¹",
"111": "1.11\u202f×\u202f10⁰²",
"1111": "1.111\u202f×\u202f10⁰³",
"11111": "1.111\u202f×\u202f10⁰⁴",
"0.1": "1\u202f×\u202f10⁻⁰¹",
"0.11": "1.1\u202f×\u202f10⁻⁰¹",
"0.001": "1\u202f×\u202f10⁻⁰³",
},
}, {
pattern: "*x##0",
test: pairs{
"0": "xx0",
"10": "x10",
"100": "100",
"1000": "1000",
},
}, {
pattern: "##0*x",
test: pairs{
"0": "0xx",
"10": "10x",
"100": "100",
"1000": "1000",
},
}, {
pattern: "* ###0.000",
test: pairs{
"0": " 0.000",
"123": " 123.000",
"123.456": " 123.456",
"1234.567": "1234.567",
},
}, {
pattern: "**0.0#######E00",
test: pairs{
"0": "***0.0\u202f×\u202f10⁰⁰",
"10": "***1.0\u202f×\u202f10⁰¹",
"11": "***1.1\u202f×\u202f10⁰¹",
"111": "**1.11\u202f×\u202f10⁰²",
"1111": "*1.111\u202f×\u202f10⁰³",
"11111": "1.1111\u202f×\u202f10⁰⁴",
"11110": "*1.111\u202f×\u202f10⁰⁴",
"11100": "**1.11\u202f×\u202f10⁰⁴",
"11000": "***1.1\u202f×\u202f10⁰⁴",
"10000": "***1.0\u202f×\u202f10⁰⁴",
},
}, {
pattern: "*xpre0suf",
test: pairs{
"0": "pre0suf",
"10": "pre10suf",
},
}, {
pattern: "*∞ pre ###0 suf",
test: pairs{
"0": "∞∞∞ pre 0 suf",
"10": "∞∞ pre 10 suf",
"100": "∞ pre 100 suf",
"1000": " pre 1000 suf",
},
}, {
pattern: "pre *∞###0 suf",
test: pairs{
"0": "pre ∞∞∞0 suf",
"10": "pre ∞∞10 suf",
"100": "pre ∞100 suf",
"1000": "pre 1000 suf",
},
}, {
pattern: "pre ###0*∞ suf",
test: pairs{
"0": "pre 0∞∞∞ suf",
"10": "pre 10∞∞ suf",
"100": "pre 100∞ suf",
"1000": "pre 1000 suf",
},
}, {
pattern: "pre ###0 suf *∞",
test: pairs{
"0": "pre 0 suf ∞∞∞",
"10": "pre 10 suf ∞∞",
"100": "pre 100 suf ∞",
"1000": "pre 1000 suf ",
},
}, {
// Take width of positive pattern.
pattern: "**###0;**-#####0x",
test: pairs{
"0": "***0",
"-1": "*-1x",
},
}, {
pattern: "0.00%",
test: pairs{
"0.1": "10.00%",
},
}, {
pattern: "0.##%",
test: pairs{
"0.1": "10%",
"0.11": "11%",
"0.111": "11.1%",
"0.1111": "11.11%",
"0.11111": "11.11%",
},
}, {
pattern: "‰ 0.0#",
test: pairs{
"0.1": "‰ 100.0",
"0.11": "‰ 110.0",
"0.111": "‰ 111.0",
"0.1111": "‰ 111.1",
"0.11111": "‰ 111.11",
"0.111111": "‰ 111.11",
},
}}
// TODO:
// "#,##0.00¤",
// "#,##0.00 ¤;(#,##0.00 ¤)",
for _, tc := range testCases {
pat := tc.pat
if pat == nil {
var err error
if pat, err = ParsePattern(tc.pattern); err != nil {
log.Fatal(err)
}
}
var f Formatter
f.InitPattern(language.English, pat)
for num, want := range tc.test {
buf := make([]byte, 100)
t.Run(tc.pattern+"/"+num, func(t *testing.T) {
var d Decimal
d.Convert(f.RoundingContext, dec(num))
buf = f.Format(buf[:0], &d)
if got := string(buf); got != want {
t.Errorf("\n got %[1]q (%[1]s)\nwant %[2]q (%[2]s)", got, want)
}
})
}
}
}
func TestLocales(t *testing.T) {
testCases := []struct {
tag language.Tag
num string
want string
}{
{language.Make("en"), "123456.78", "123,456.78"},
{language.Make("de"), "123456.78", "123.456,78"},
{language.Make("de-CH"), "123456.78", "123’456.78"},
{language.Make("fr"), "123456.78", "123 456,78"},
{language.Make("bn"), "123456.78", "১,২৩,৪৫৬.৭৮"},
}
for _, tc := range testCases {
t.Run(fmt.Sprint(tc.tag, "/", tc.num), func(t *testing.T) {
var f Formatter
f.InitDecimal(tc.tag)
var d Decimal
d.Convert(f.RoundingContext, dec(tc.num))
b := f.Format(nil, &d)
if got := string(b); got != tc.want {
t.Errorf("got %[1]q (%[1]s); want %[2]q (%[2]s)", got, tc.want)
}
})
}
}
func TestFormatters(t *testing.T) {
var f Formatter
testCases := []struct {
init func(t language.Tag)
num string
want string
}{
{f.InitDecimal, "123456.78", "123,456.78"},
{f.InitScientific, "123456.78", "1.23\u202f×\u202f10⁵"},
{f.InitEngineering, "123456.78", "123.46\u202f×\u202f10³"},
{f.InitEngineering, "1234", "1.23\u202f×\u202f10³"},
{f.InitPercent, "0.1234", "12.34%"},
{f.InitPerMille, "0.1234", "123.40‰"},
}
for i, tc := range testCases {
t.Run(fmt.Sprint(i, "/", tc.num), func(t *testing.T) {
tc.init(language.English)
f.SetScale(2)
var d Decimal
d.Convert(f.RoundingContext, dec(tc.num))
b := f.Format(nil, &d)
if got := string(b); got != tc.want {
t.Errorf("got %[1]q (%[1]s); want %[2]q (%[2]s)", got, tc.want)
}
})
}
}