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      1 // Copyright 2009 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 strconv_test
      6 
      7 import (
      8 	. "strconv"
      9 	"testing"
     10 )
     11 
     12 type itob64Test struct {
     13 	in   int64
     14 	base int
     15 	out  string
     16 }
     17 
     18 var itob64tests = []itob64Test{
     19 	{0, 10, "0"},
     20 	{1, 10, "1"},
     21 	{-1, 10, "-1"},
     22 	{12345678, 10, "12345678"},
     23 	{-987654321, 10, "-987654321"},
     24 	{1<<31 - 1, 10, "2147483647"},
     25 	{-1<<31 + 1, 10, "-2147483647"},
     26 	{1 << 31, 10, "2147483648"},
     27 	{-1 << 31, 10, "-2147483648"},
     28 	{1<<31 + 1, 10, "2147483649"},
     29 	{-1<<31 - 1, 10, "-2147483649"},
     30 	{1<<32 - 1, 10, "4294967295"},
     31 	{-1<<32 + 1, 10, "-4294967295"},
     32 	{1 << 32, 10, "4294967296"},
     33 	{-1 << 32, 10, "-4294967296"},
     34 	{1<<32 + 1, 10, "4294967297"},
     35 	{-1<<32 - 1, 10, "-4294967297"},
     36 	{1 << 50, 10, "1125899906842624"},
     37 	{1<<63 - 1, 10, "9223372036854775807"},
     38 	{-1<<63 + 1, 10, "-9223372036854775807"},
     39 	{-1 << 63, 10, "-9223372036854775808"},
     40 
     41 	{0, 2, "0"},
     42 	{10, 2, "1010"},
     43 	{-1, 2, "-1"},
     44 	{1 << 15, 2, "1000000000000000"},
     45 
     46 	{-8, 8, "-10"},
     47 	{057635436545, 8, "57635436545"},
     48 	{1 << 24, 8, "100000000"},
     49 
     50 	{16, 16, "10"},
     51 	{-0x123456789abcdef, 16, "-123456789abcdef"},
     52 	{1<<63 - 1, 16, "7fffffffffffffff"},
     53 	{1<<63 - 1, 2, "111111111111111111111111111111111111111111111111111111111111111"},
     54 	{-1 << 63, 2, "-1000000000000000000000000000000000000000000000000000000000000000"},
     55 
     56 	{16, 17, "g"},
     57 	{25, 25, "10"},
     58 	{(((((17*35+24)*35+21)*35+34)*35+12)*35+24)*35 + 32, 35, "holycow"},
     59 	{(((((17*36+24)*36+21)*36+34)*36+12)*36+24)*36 + 32, 36, "holycow"},
     60 }
     61 
     62 func TestItoa(t *testing.T) {
     63 	for _, test := range itob64tests {
     64 		s := FormatInt(test.in, test.base)
     65 		if s != test.out {
     66 			t.Errorf("FormatInt(%v, %v) = %v want %v",
     67 				test.in, test.base, s, test.out)
     68 		}
     69 		x := AppendInt([]byte("abc"), test.in, test.base)
     70 		if string(x) != "abc"+test.out {
     71 			t.Errorf("AppendInt(%q, %v, %v) = %q want %v",
     72 				"abc", test.in, test.base, x, test.out)
     73 		}
     74 
     75 		if test.in >= 0 {
     76 			s := FormatUint(uint64(test.in), test.base)
     77 			if s != test.out {
     78 				t.Errorf("FormatUint(%v, %v) = %v want %v",
     79 					test.in, test.base, s, test.out)
     80 			}
     81 			x := AppendUint(nil, uint64(test.in), test.base)
     82 			if string(x) != test.out {
     83 				t.Errorf("AppendUint(%q, %v, %v) = %q want %v",
     84 					"abc", uint64(test.in), test.base, x, test.out)
     85 			}
     86 		}
     87 
     88 		if test.base == 10 && int64(int(test.in)) == test.in {
     89 			s := Itoa(int(test.in))
     90 			if s != test.out {
     91 				t.Errorf("Itoa(%v) = %v want %v",
     92 					test.in, s, test.out)
     93 			}
     94 		}
     95 	}
     96 }
     97 
     98 type uitob64Test struct {
     99 	in   uint64
    100 	base int
    101 	out  string
    102 }
    103 
    104 var uitob64tests = []uitob64Test{
    105 	{1<<63 - 1, 10, "9223372036854775807"},
    106 	{1 << 63, 10, "9223372036854775808"},
    107 	{1<<63 + 1, 10, "9223372036854775809"},
    108 	{1<<64 - 2, 10, "18446744073709551614"},
    109 	{1<<64 - 1, 10, "18446744073709551615"},
    110 	{1<<64 - 1, 2, "1111111111111111111111111111111111111111111111111111111111111111"},
    111 }
    112 
    113 func TestUitoa(t *testing.T) {
    114 	for _, test := range uitob64tests {
    115 		s := FormatUint(test.in, test.base)
    116 		if s != test.out {
    117 			t.Errorf("FormatUint(%v, %v) = %v want %v",
    118 				test.in, test.base, s, test.out)
    119 		}
    120 		x := AppendUint([]byte("abc"), test.in, test.base)
    121 		if string(x) != "abc"+test.out {
    122 			t.Errorf("AppendUint(%q, %v, %v) = %q want %v",
    123 				"abc", test.in, test.base, x, test.out)
    124 		}
    125 
    126 	}
    127 }
    128 
    129 func BenchmarkFormatInt(b *testing.B) {
    130 	for i := 0; i < b.N; i++ {
    131 		for _, test := range itob64tests {
    132 			FormatInt(test.in, test.base)
    133 		}
    134 	}
    135 }
    136 
    137 func BenchmarkAppendInt(b *testing.B) {
    138 	dst := make([]byte, 0, 30)
    139 	for i := 0; i < b.N; i++ {
    140 		for _, test := range itob64tests {
    141 			AppendInt(dst, test.in, test.base)
    142 		}
    143 	}
    144 }
    145 
    146 func BenchmarkFormatUint(b *testing.B) {
    147 	for i := 0; i < b.N; i++ {
    148 		for _, test := range uitob64tests {
    149 			FormatUint(test.in, test.base)
    150 		}
    151 	}
    152 }
    153 
    154 func BenchmarkAppendUint(b *testing.B) {
    155 	dst := make([]byte, 0, 30)
    156 	for i := 0; i < b.N; i++ {
    157 		for _, test := range uitob64tests {
    158 			AppendUint(dst, test.in, test.base)
    159 		}
    160 	}
    161 }
    162