number_test.go

Documentation: golang.org/x/text/internal/number

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package number
     6  
     7  import (
     8  	"fmt"
     9  	"testing"
    10  
    11  	"golang.org/x/text/language"
    12  )
    13  
    14  func TestInfo(t *testing.T) {
    15  	testCases := []struct {
    16  		lang     string
    17  		sym      SymbolType
    18  		wantSym  string
    19  		wantNine rune
    20  	}{
    21  		{"und", SymDecimal, ".", '9'},
    22  		{"de", SymGroup, ".", '9'},
    23  		{"de-BE", SymGroup, ".", '9'},          // inherits from de (no number data in CLDR)
    24  		{"de-BE-oxendict", SymGroup, ".", '9'}, // inherits from de (no compact index)
    25  
    26  		// U+096F DEVANAGARI DIGIT NINE ('९')
    27  		{"de-BE-u-nu-deva", SymGroup, ".", '\u096f'}, // miss -> latn -> de
    28  		{"de-Cyrl-BE", SymGroup, ",", '9'},           // inherits from root
    29  		{"de-CH", SymGroup, "’", '9'},                // overrides values in de
    30  		{"de-CH-oxendict", SymGroup, "’", '9'},       // inherits from de-CH (no compact index)
    31  		{"de-CH-u-nu-deva", SymGroup, "’", '\u096f'}, // miss -> latn -> de-CH
    32  
    33  		{"bn-u-nu-beng", SymGroup, ",", '\u09ef'},
    34  		{"bn-u-nu-deva", SymGroup, ",", '\u096f'},
    35  		{"bn-u-nu-latn", SymGroup, ",", '9'},
    36  
    37  		{"pa", SymExponential, "E", '9'},
    38  
    39  		// "×۱۰^" -> U+00d7 U+06f1 U+06f0^"
    40  		// U+06F0 EXTENDED ARABIC-INDIC DIGIT ZERO
    41  		// U+06F1 EXTENDED ARABIC-INDIC DIGIT ONE
    42  		// U+06F9 EXTENDED ARABIC-INDIC DIGIT NINE
    43  		{"pa-u-nu-arabext", SymExponential, "\u00d7\u06f1\u06f0^", '\u06f9'},
    44  
    45  		//  "གྲངས་མེད" - > U+0f42 U+0fb2 U+0f44 U+0f66 U+0f0b U+0f58 U+0f7a U+0f51
    46  		// Examples:
    47  		// U+0F29 TIBETAN DIGIT NINE (༩)
    48  		{"dz", SymInfinity, "\u0f42\u0fb2\u0f44\u0f66\u0f0b\u0f58\u0f7a\u0f51", '\u0f29'}, // defaults to tibt
    49  		{"dz-u-nu-latn", SymInfinity, "∞", '9'},                                           // select alternative
    50  		{"dz-u-nu-tibt", SymInfinity, "\u0f42\u0fb2\u0f44\u0f66\u0f0b\u0f58\u0f7a\u0f51", '\u0f29'},
    51  		{"en-u-nu-tibt", SymInfinity, "∞", '\u0f29'},
    52  
    53  		// algorithmic number systems fall back to ASCII if Digits is used.
    54  		{"en-u-nu-hanidec", SymPlusSign, "+", '9'},
    55  		{"en-u-nu-roman", SymPlusSign, "+", '9'},
    56  	}
    57  	for _, tc := range testCases {
    58  		t.Run(fmt.Sprintf("%s:%v", tc.lang, tc.sym), func(t *testing.T) {
    59  			info := InfoFromTag(language.MustParse(tc.lang))
    60  			if got := info.Symbol(tc.sym); got != tc.wantSym {
    61  				t.Errorf("sym: got %q; want %q", got, tc.wantSym)
    62  			}
    63  			if got := info.Digit('9'); got != tc.wantNine {
    64  				t.Errorf("Digit(9): got %+q; want %+q", got, tc.wantNine)
    65  			}
    66  			var buf [4]byte
    67  			if got := string(buf[:info.WriteDigit(buf[:], '9')]); got != string(tc.wantNine) {
    68  				t.Errorf("WriteDigit(9): got %+q; want %+q", got, tc.wantNine)
    69  			}
    70  			if got := string(info.AppendDigit([]byte{}, 9)); got != string(tc.wantNine) {
    71  				t.Errorf("AppendDigit(9): got %+q; want %+q", got, tc.wantNine)
    72  			}
    73  		})
    74  	}
    75  }
    76  
    77  func TestFormats(t *testing.T) {
    78  	testCases := []struct {
    79  		lang    string
    80  		pattern string
    81  		index   []byte
    82  	}{
    83  		{"en", "#,##0.###", tagToDecimal},
    84  		{"de", "#,##0.###", tagToDecimal},
    85  		{"de-CH", "#,##0.###", tagToDecimal},
    86  		{"pa", "#,##,##0.###", tagToDecimal},
    87  		{"pa-Arab", "#,##0.###", tagToDecimal}, // Does NOT inherit from pa!
    88  		{"mr", "#,##,##0.###", tagToDecimal},
    89  		{"mr-IN", "#,##,##0.###", tagToDecimal}, // Inherits from mr.
    90  		{"nl", "#E0", tagToScientific},
    91  		{"nl-MX", "#E0", tagToScientific}, // Inherits through Tag.Parent.
    92  		{"zgh", "#,##0 %", tagToPercent},
    93  	}
    94  	for _, tc := range testCases {
    95  		t.Run(tc.lang, func(t *testing.T) {
    96  			got := formatForLang(language.MustParse(tc.lang), tc.index)
    97  			want, _ := ParsePattern(tc.pattern)
    98  			if *got != *want {
    99  				t.Errorf("\ngot  %#v;\nwant %#v", got, want)
   100  			}
   101  		})
   102  	}
   103  }
   104
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