Source file src/strconv/atoi_test.go

Documentation: strconv

     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  	"errors"
     9  	"fmt"
    10  	"reflect"
    11  	. "strconv"
    12  	"testing"
    13  )
    14  
    15  type parseUint64Test struct {
    16  	in  string
    17  	out uint64
    18  	err error
    19  }
    20  
    21  var parseUint64Tests = []parseUint64Test{
    22  	{"", 0, ErrSyntax},
    23  	{"0", 0, nil},
    24  	{"1", 1, nil},
    25  	{"12345", 12345, nil},
    26  	{"012345", 12345, nil},
    27  	{"12345x", 0, ErrSyntax},
    28  	{"98765432100", 98765432100, nil},
    29  	{"18446744073709551615", 1<<64 - 1, nil},
    30  	{"18446744073709551616", 1<<64 - 1, ErrRange},
    31  	{"18446744073709551620", 1<<64 - 1, ErrRange},
    32  	{"1_2_3_4_5", 0, ErrSyntax}, // base=10 so no underscores allowed
    33  	{"_12345", 0, ErrSyntax},
    34  	{"1__2345", 0, ErrSyntax},
    35  	{"12345_", 0, ErrSyntax},
    36  	{"-0", 0, ErrSyntax},
    37  	{"-1", 0, ErrSyntax},
    38  	{"+1", 0, ErrSyntax},
    39  }
    40  
    41  type parseUint64BaseTest struct {
    42  	in   string
    43  	base int
    44  	out  uint64
    45  	err  error
    46  }
    47  
    48  var parseUint64BaseTests = []parseUint64BaseTest{
    49  	{"", 0, 0, ErrSyntax},
    50  	{"0", 0, 0, nil},
    51  	{"0x", 0, 0, ErrSyntax},
    52  	{"0X", 0, 0, ErrSyntax},
    53  	{"1", 0, 1, nil},
    54  	{"12345", 0, 12345, nil},
    55  	{"012345", 0, 012345, nil},
    56  	{"0x12345", 0, 0x12345, nil},
    57  	{"0X12345", 0, 0x12345, nil},
    58  	{"12345x", 0, 0, ErrSyntax},
    59  	{"0xabcdefg123", 0, 0, ErrSyntax},
    60  	{"123456789abc", 0, 0, ErrSyntax},
    61  	{"98765432100", 0, 98765432100, nil},
    62  	{"18446744073709551615", 0, 1<<64 - 1, nil},
    63  	{"18446744073709551616", 0, 1<<64 - 1, ErrRange},
    64  	{"18446744073709551620", 0, 1<<64 - 1, ErrRange},
    65  	{"0xFFFFFFFFFFFFFFFF", 0, 1<<64 - 1, nil},
    66  	{"0x10000000000000000", 0, 1<<64 - 1, ErrRange},
    67  	{"01777777777777777777777", 0, 1<<64 - 1, nil},
    68  	{"01777777777777777777778", 0, 0, ErrSyntax},
    69  	{"02000000000000000000000", 0, 1<<64 - 1, ErrRange},
    70  	{"0200000000000000000000", 0, 1 << 61, nil},
    71  	{"0b", 0, 0, ErrSyntax},
    72  	{"0B", 0, 0, ErrSyntax},
    73  	{"0b101", 0, 5, nil},
    74  	{"0B101", 0, 5, nil},
    75  	{"0o", 0, 0, ErrSyntax},
    76  	{"0O", 0, 0, ErrSyntax},
    77  	{"0o377", 0, 255, nil},
    78  	{"0O377", 0, 255, nil},
    79  
    80  	// underscores allowed with base == 0 only
    81  	{"1_2_3_4_5", 0, 12345, nil}, // base 0 => 10
    82  	{"_12345", 0, 0, ErrSyntax},
    83  	{"1__2345", 0, 0, ErrSyntax},
    84  	{"12345_", 0, 0, ErrSyntax},
    85  
    86  	{"1_2_3_4_5", 10, 0, ErrSyntax}, // base 10
    87  	{"_12345", 10, 0, ErrSyntax},
    88  	{"1__2345", 10, 0, ErrSyntax},
    89  	{"12345_", 10, 0, ErrSyntax},
    90  
    91  	{"0x_1_2_3_4_5", 0, 0x12345, nil}, // base 0 => 16
    92  	{"_0x12345", 0, 0, ErrSyntax},
    93  	{"0x__12345", 0, 0, ErrSyntax},
    94  	{"0x1__2345", 0, 0, ErrSyntax},
    95  	{"0x1234__5", 0, 0, ErrSyntax},
    96  	{"0x12345_", 0, 0, ErrSyntax},
    97  
    98  	{"1_2_3_4_5", 16, 0, ErrSyntax}, // base 16
    99  	{"_12345", 16, 0, ErrSyntax},
   100  	{"1__2345", 16, 0, ErrSyntax},
   101  	{"1234__5", 16, 0, ErrSyntax},
   102  	{"12345_", 16, 0, ErrSyntax},
   103  
   104  	{"0_1_2_3_4_5", 0, 012345, nil}, // base 0 => 8 (0377)
   105  	{"_012345", 0, 0, ErrSyntax},
   106  	{"0__12345", 0, 0, ErrSyntax},
   107  	{"01234__5", 0, 0, ErrSyntax},
   108  	{"012345_", 0, 0, ErrSyntax},
   109  
   110  	{"0o_1_2_3_4_5", 0, 012345, nil}, // base 0 => 8 (0o377)
   111  	{"_0o12345", 0, 0, ErrSyntax},
   112  	{"0o__12345", 0, 0, ErrSyntax},
   113  	{"0o1234__5", 0, 0, ErrSyntax},
   114  	{"0o12345_", 0, 0, ErrSyntax},
   115  
   116  	{"0_1_2_3_4_5", 8, 0, ErrSyntax}, // base 8
   117  	{"_012345", 8, 0, ErrSyntax},
   118  	{"0__12345", 8, 0, ErrSyntax},
   119  	{"01234__5", 8, 0, ErrSyntax},
   120  	{"012345_", 8, 0, ErrSyntax},
   121  
   122  	{"0b_1_0_1", 0, 5, nil}, // base 0 => 2 (0b101)
   123  	{"_0b101", 0, 0, ErrSyntax},
   124  	{"0b__101", 0, 0, ErrSyntax},
   125  	{"0b1__01", 0, 0, ErrSyntax},
   126  	{"0b10__1", 0, 0, ErrSyntax},
   127  	{"0b101_", 0, 0, ErrSyntax},
   128  
   129  	{"1_0_1", 2, 0, ErrSyntax}, // base 2
   130  	{"_101", 2, 0, ErrSyntax},
   131  	{"1_01", 2, 0, ErrSyntax},
   132  	{"10_1", 2, 0, ErrSyntax},
   133  	{"101_", 2, 0, ErrSyntax},
   134  }
   135  
   136  type parseInt64Test struct {
   137  	in  string
   138  	out int64
   139  	err error
   140  }
   141  
   142  var parseInt64Tests = []parseInt64Test{
   143  	{"", 0, ErrSyntax},
   144  	{"0", 0, nil},
   145  	{"-0", 0, nil},
   146  	{"+0", 0, nil},
   147  	{"1", 1, nil},
   148  	{"-1", -1, nil},
   149  	{"+1", 1, nil},
   150  	{"12345", 12345, nil},
   151  	{"-12345", -12345, nil},
   152  	{"012345", 12345, nil},
   153  	{"-012345", -12345, nil},
   154  	{"98765432100", 98765432100, nil},
   155  	{"-98765432100", -98765432100, nil},
   156  	{"9223372036854775807", 1<<63 - 1, nil},
   157  	{"-9223372036854775807", -(1<<63 - 1), nil},
   158  	{"9223372036854775808", 1<<63 - 1, ErrRange},
   159  	{"-9223372036854775808", -1 << 63, nil},
   160  	{"9223372036854775809", 1<<63 - 1, ErrRange},
   161  	{"-9223372036854775809", -1 << 63, ErrRange},
   162  	{"-1_2_3_4_5", 0, ErrSyntax}, // base=10 so no underscores allowed
   163  	{"-_12345", 0, ErrSyntax},
   164  	{"_12345", 0, ErrSyntax},
   165  	{"1__2345", 0, ErrSyntax},
   166  	{"12345_", 0, ErrSyntax},
   167  	{"123%45", 0, ErrSyntax},
   168  }
   169  
   170  type parseInt64BaseTest struct {
   171  	in   string
   172  	base int
   173  	out  int64
   174  	err  error
   175  }
   176  
   177  var parseInt64BaseTests = []parseInt64BaseTest{
   178  	{"", 0, 0, ErrSyntax},
   179  	{"0", 0, 0, nil},
   180  	{"-0", 0, 0, nil},
   181  	{"1", 0, 1, nil},
   182  	{"-1", 0, -1, nil},
   183  	{"12345", 0, 12345, nil},
   184  	{"-12345", 0, -12345, nil},
   185  	{"012345", 0, 012345, nil},
   186  	{"-012345", 0, -012345, nil},
   187  	{"0x12345", 0, 0x12345, nil},
   188  	{"-0X12345", 0, -0x12345, nil},
   189  	{"12345x", 0, 0, ErrSyntax},
   190  	{"-12345x", 0, 0, ErrSyntax},
   191  	{"98765432100", 0, 98765432100, nil},
   192  	{"-98765432100", 0, -98765432100, nil},
   193  	{"9223372036854775807", 0, 1<<63 - 1, nil},
   194  	{"-9223372036854775807", 0, -(1<<63 - 1), nil},
   195  	{"9223372036854775808", 0, 1<<63 - 1, ErrRange},
   196  	{"-9223372036854775808", 0, -1 << 63, nil},
   197  	{"9223372036854775809", 0, 1<<63 - 1, ErrRange},
   198  	{"-9223372036854775809", 0, -1 << 63, ErrRange},
   199  
   200  	// other bases
   201  	{"g", 17, 16, nil},
   202  	{"10", 25, 25, nil},
   203  	{"holycow", 35, (((((17*35+24)*35+21)*35+34)*35+12)*35+24)*35 + 32, nil},
   204  	{"holycow", 36, (((((17*36+24)*36+21)*36+34)*36+12)*36+24)*36 + 32, nil},
   205  
   206  	// base 2
   207  	{"0", 2, 0, nil},
   208  	{"-1", 2, -1, nil},
   209  	{"1010", 2, 10, nil},
   210  	{"1000000000000000", 2, 1 << 15, nil},
   211  	{"111111111111111111111111111111111111111111111111111111111111111", 2, 1<<63 - 1, nil},
   212  	{"1000000000000000000000000000000000000000000000000000000000000000", 2, 1<<63 - 1, ErrRange},
   213  	{"-1000000000000000000000000000000000000000000000000000000000000000", 2, -1 << 63, nil},
   214  	{"-1000000000000000000000000000000000000000000000000000000000000001", 2, -1 << 63, ErrRange},
   215  
   216  	// base 8
   217  	{"-10", 8, -8, nil},
   218  	{"57635436545", 8, 057635436545, nil},
   219  	{"100000000", 8, 1 << 24, nil},
   220  
   221  	// base 16
   222  	{"10", 16, 16, nil},
   223  	{"-123456789abcdef", 16, -0x123456789abcdef, nil},
   224  	{"7fffffffffffffff", 16, 1<<63 - 1, nil},
   225  
   226  	// underscores
   227  	{"-0x_1_2_3_4_5", 0, -0x12345, nil},
   228  	{"0x_1_2_3_4_5", 0, 0x12345, nil},
   229  	{"-_0x12345", 0, 0, ErrSyntax},
   230  	{"_-0x12345", 0, 0, ErrSyntax},
   231  	{"_0x12345", 0, 0, ErrSyntax},
   232  	{"0x__12345", 0, 0, ErrSyntax},
   233  	{"0x1__2345", 0, 0, ErrSyntax},
   234  	{"0x1234__5", 0, 0, ErrSyntax},
   235  	{"0x12345_", 0, 0, ErrSyntax},
   236  
   237  	{"-0_1_2_3_4_5", 0, -012345, nil}, // octal
   238  	{"0_1_2_3_4_5", 0, 012345, nil},   // octal
   239  	{"-_012345", 0, 0, ErrSyntax},
   240  	{"_-012345", 0, 0, ErrSyntax},
   241  	{"_012345", 0, 0, ErrSyntax},
   242  	{"0__12345", 0, 0, ErrSyntax},
   243  	{"01234__5", 0, 0, ErrSyntax},
   244  	{"012345_", 0, 0, ErrSyntax},
   245  
   246  	{"+0xf", 0, 0xf, nil},
   247  	{"-0xf", 0, -0xf, nil},
   248  	{"0x+f", 0, 0, ErrSyntax},
   249  	{"0x-f", 0, 0, ErrSyntax},
   250  }
   251  
   252  type parseUint32Test struct {
   253  	in  string
   254  	out uint32
   255  	err error
   256  }
   257  
   258  var parseUint32Tests = []parseUint32Test{
   259  	{"", 0, ErrSyntax},
   260  	{"0", 0, nil},
   261  	{"1", 1, nil},
   262  	{"12345", 12345, nil},
   263  	{"012345", 12345, nil},
   264  	{"12345x", 0, ErrSyntax},
   265  	{"987654321", 987654321, nil},
   266  	{"4294967295", 1<<32 - 1, nil},
   267  	{"4294967296", 1<<32 - 1, ErrRange},
   268  	{"1_2_3_4_5", 0, ErrSyntax}, // base=10 so no underscores allowed
   269  	{"_12345", 0, ErrSyntax},
   270  	{"_12345", 0, ErrSyntax},
   271  	{"1__2345", 0, ErrSyntax},
   272  	{"12345_", 0, ErrSyntax},
   273  }
   274  
   275  type parseInt32Test struct {
   276  	in  string
   277  	out int32
   278  	err error
   279  }
   280  
   281  var parseInt32Tests = []parseInt32Test{
   282  	{"", 0, ErrSyntax},
   283  	{"0", 0, nil},
   284  	{"-0", 0, nil},
   285  	{"1", 1, nil},
   286  	{"-1", -1, nil},
   287  	{"12345", 12345, nil},
   288  	{"-12345", -12345, nil},
   289  	{"012345", 12345, nil},
   290  	{"-012345", -12345, nil},
   291  	{"12345x", 0, ErrSyntax},
   292  	{"-12345x", 0, ErrSyntax},
   293  	{"987654321", 987654321, nil},
   294  	{"-987654321", -987654321, nil},
   295  	{"2147483647", 1<<31 - 1, nil},
   296  	{"-2147483647", -(1<<31 - 1), nil},
   297  	{"2147483648", 1<<31 - 1, ErrRange},
   298  	{"-2147483648", -1 << 31, nil},
   299  	{"2147483649", 1<<31 - 1, ErrRange},
   300  	{"-2147483649", -1 << 31, ErrRange},
   301  	{"-1_2_3_4_5", 0, ErrSyntax}, // base=10 so no underscores allowed
   302  	{"-_12345", 0, ErrSyntax},
   303  	{"_12345", 0, ErrSyntax},
   304  	{"1__2345", 0, ErrSyntax},
   305  	{"12345_", 0, ErrSyntax},
   306  	{"123%45", 0, ErrSyntax},
   307  }
   308  
   309  type numErrorTest struct {
   310  	num, want string
   311  }
   312  
   313  var numErrorTests = []numErrorTest{
   314  	{"0", `strconv.ParseFloat: parsing "0": failed`},
   315  	{"`", "strconv.ParseFloat: parsing \"`\": failed"},
   316  	{"1\x00.2", `strconv.ParseFloat: parsing "1\x00.2": failed`},
   317  }
   318  
   319  func init() {
   320  	// The parse routines return NumErrors wrapping
   321  	// the error and the string. Convert the tables above.
   322  	for i := range parseUint64Tests {
   323  		test := &parseUint64Tests[i]
   324  		if test.err != nil {
   325  			test.err = &NumError{"ParseUint", test.in, test.err}
   326  		}
   327  	}
   328  	for i := range parseUint64BaseTests {
   329  		test := &parseUint64BaseTests[i]
   330  		if test.err != nil {
   331  			test.err = &NumError{"ParseUint", test.in, test.err}
   332  		}
   333  	}
   334  	for i := range parseInt64Tests {
   335  		test := &parseInt64Tests[i]
   336  		if test.err != nil {
   337  			test.err = &NumError{"ParseInt", test.in, test.err}
   338  		}
   339  	}
   340  	for i := range parseInt64BaseTests {
   341  		test := &parseInt64BaseTests[i]
   342  		if test.err != nil {
   343  			test.err = &NumError{"ParseInt", test.in, test.err}
   344  		}
   345  	}
   346  	for i := range parseUint32Tests {
   347  		test := &parseUint32Tests[i]
   348  		if test.err != nil {
   349  			test.err = &NumError{"ParseUint", test.in, test.err}
   350  		}
   351  	}
   352  	for i := range parseInt32Tests {
   353  		test := &parseInt32Tests[i]
   354  		if test.err != nil {
   355  			test.err = &NumError{"ParseInt", test.in, test.err}
   356  		}
   357  	}
   358  }
   359  
   360  func TestParseUint32(t *testing.T) {
   361  	for i := range parseUint32Tests {
   362  		test := &parseUint32Tests[i]
   363  		out, err := ParseUint(test.in, 10, 32)
   364  		if uint64(test.out) != out || !reflect.DeepEqual(test.err, err) {
   365  			t.Errorf("ParseUint(%q, 10, 32) = %v, %v want %v, %v",
   366  				test.in, out, err, test.out, test.err)
   367  		}
   368  	}
   369  }
   370  
   371  func TestParseUint64(t *testing.T) {
   372  	for i := range parseUint64Tests {
   373  		test := &parseUint64Tests[i]
   374  		out, err := ParseUint(test.in, 10, 64)
   375  		if test.out != out || !reflect.DeepEqual(test.err, err) {
   376  			t.Errorf("ParseUint(%q, 10, 64) = %v, %v want %v, %v",
   377  				test.in, out, err, test.out, test.err)
   378  		}
   379  	}
   380  }
   381  
   382  func TestParseUint64Base(t *testing.T) {
   383  	for i := range parseUint64BaseTests {
   384  		test := &parseUint64BaseTests[i]
   385  		out, err := ParseUint(test.in, test.base, 64)
   386  		if test.out != out || !reflect.DeepEqual(test.err, err) {
   387  			t.Errorf("ParseUint(%q, %v, 64) = %v, %v want %v, %v",
   388  				test.in, test.base, out, err, test.out, test.err)
   389  		}
   390  	}
   391  }
   392  
   393  func TestParseInt32(t *testing.T) {
   394  	for i := range parseInt32Tests {
   395  		test := &parseInt32Tests[i]
   396  		out, err := ParseInt(test.in, 10, 32)
   397  		if int64(test.out) != out || !reflect.DeepEqual(test.err, err) {
   398  			t.Errorf("ParseInt(%q, 10 ,32) = %v, %v want %v, %v",
   399  				test.in, out, err, test.out, test.err)
   400  		}
   401  	}
   402  }
   403  
   404  func TestParseInt64(t *testing.T) {
   405  	for i := range parseInt64Tests {
   406  		test := &parseInt64Tests[i]
   407  		out, err := ParseInt(test.in, 10, 64)
   408  		if test.out != out || !reflect.DeepEqual(test.err, err) {
   409  			t.Errorf("ParseInt(%q, 10, 64) = %v, %v want %v, %v",
   410  				test.in, out, err, test.out, test.err)
   411  		}
   412  	}
   413  }
   414  
   415  func TestParseInt64Base(t *testing.T) {
   416  	for i := range parseInt64BaseTests {
   417  		test := &parseInt64BaseTests[i]
   418  		out, err := ParseInt(test.in, test.base, 64)
   419  		if test.out != out || !reflect.DeepEqual(test.err, err) {
   420  			t.Errorf("ParseInt(%q, %v, 64) = %v, %v want %v, %v",
   421  				test.in, test.base, out, err, test.out, test.err)
   422  		}
   423  	}
   424  }
   425  
   426  func TestParseUint(t *testing.T) {
   427  	switch IntSize {
   428  	case 32:
   429  		for i := range parseUint32Tests {
   430  			test := &parseUint32Tests[i]
   431  			out, err := ParseUint(test.in, 10, 0)
   432  			if uint64(test.out) != out || !reflect.DeepEqual(test.err, err) {
   433  				t.Errorf("ParseUint(%q, 10, 0) = %v, %v want %v, %v",
   434  					test.in, out, err, test.out, test.err)
   435  			}
   436  		}
   437  	case 64:
   438  		for i := range parseUint64Tests {
   439  			test := &parseUint64Tests[i]
   440  			out, err := ParseUint(test.in, 10, 0)
   441  			if test.out != out || !reflect.DeepEqual(test.err, err) {
   442  				t.Errorf("ParseUint(%q, 10, 0) = %v, %v want %v, %v",
   443  					test.in, out, err, test.out, test.err)
   444  			}
   445  		}
   446  	}
   447  }
   448  
   449  func TestParseInt(t *testing.T) {
   450  	switch IntSize {
   451  	case 32:
   452  		for i := range parseInt32Tests {
   453  			test := &parseInt32Tests[i]
   454  			out, err := ParseInt(test.in, 10, 0)
   455  			if int64(test.out) != out || !reflect.DeepEqual(test.err, err) {
   456  				t.Errorf("ParseInt(%q, 10, 0) = %v, %v want %v, %v",
   457  					test.in, out, err, test.out, test.err)
   458  			}
   459  		}
   460  	case 64:
   461  		for i := range parseInt64Tests {
   462  			test := &parseInt64Tests[i]
   463  			out, err := ParseInt(test.in, 10, 0)
   464  			if test.out != out || !reflect.DeepEqual(test.err, err) {
   465  				t.Errorf("ParseInt(%q, 10, 0) = %v, %v want %v, %v",
   466  					test.in, out, err, test.out, test.err)
   467  			}
   468  		}
   469  	}
   470  }
   471  
   472  func TestAtoi(t *testing.T) {
   473  	switch IntSize {
   474  	case 32:
   475  		for i := range parseInt32Tests {
   476  			test := &parseInt32Tests[i]
   477  			out, err := Atoi(test.in)
   478  			var testErr error
   479  			if test.err != nil {
   480  				testErr = &NumError{"Atoi", test.in, test.err.(*NumError).Err}
   481  			}
   482  			if int(test.out) != out || !reflect.DeepEqual(testErr, err) {
   483  				t.Errorf("Atoi(%q) = %v, %v want %v, %v",
   484  					test.in, out, err, test.out, testErr)
   485  			}
   486  		}
   487  	case 64:
   488  		for i := range parseInt64Tests {
   489  			test := &parseInt64Tests[i]
   490  			out, err := Atoi(test.in)
   491  			var testErr error
   492  			if test.err != nil {
   493  				testErr = &NumError{"Atoi", test.in, test.err.(*NumError).Err}
   494  			}
   495  			if test.out != int64(out) || !reflect.DeepEqual(testErr, err) {
   496  				t.Errorf("Atoi(%q) = %v, %v want %v, %v",
   497  					test.in, out, err, test.out, testErr)
   498  			}
   499  		}
   500  	}
   501  }
   502  
   503  func bitSizeErrStub(name string, bitSize int) error {
   504  	return BitSizeError(name, "0", bitSize)
   505  }
   506  
   507  func baseErrStub(name string, base int) error {
   508  	return BaseError(name, "0", base)
   509  }
   510  
   511  func noErrStub(name string, arg int) error {
   512  	return nil
   513  }
   514  
   515  type parseErrorTest struct {
   516  	arg     int
   517  	errStub func(name string, arg int) error
   518  }
   519  
   520  var parseBitSizeTests = []parseErrorTest{
   521  	{-1, bitSizeErrStub},
   522  	{0, noErrStub},
   523  	{64, noErrStub},
   524  	{65, bitSizeErrStub},
   525  }
   526  
   527  var parseBaseTests = []parseErrorTest{
   528  	{-1, baseErrStub},
   529  	{0, noErrStub},
   530  	{1, baseErrStub},
   531  	{2, noErrStub},
   532  	{36, noErrStub},
   533  	{37, baseErrStub},
   534  }
   535  
   536  func equalError(a, b error) bool {
   537  	if a == nil {
   538  		return b == nil
   539  	}
   540  	if b == nil {
   541  		return a == nil
   542  	}
   543  	return a.Error() == b.Error()
   544  }
   545  
   546  func TestParseIntBitSize(t *testing.T) {
   547  	for i := range parseBitSizeTests {
   548  		test := &parseBitSizeTests[i]
   549  		testErr := test.errStub("ParseInt", test.arg)
   550  		_, err := ParseInt("0", 0, test.arg)
   551  		if !equalError(testErr, err) {
   552  			t.Errorf("ParseInt(\"0\", 0, %v) = 0, %v want 0, %v",
   553  				test.arg, err, testErr)
   554  		}
   555  	}
   556  }
   557  
   558  func TestParseUintBitSize(t *testing.T) {
   559  	for i := range parseBitSizeTests {
   560  		test := &parseBitSizeTests[i]
   561  		testErr := test.errStub("ParseUint", test.arg)
   562  		_, err := ParseUint("0", 0, test.arg)
   563  		if !equalError(testErr, err) {
   564  			t.Errorf("ParseUint(\"0\", 0, %v) = 0, %v want 0, %v",
   565  				test.arg, err, testErr)
   566  		}
   567  	}
   568  }
   569  
   570  func TestParseIntBase(t *testing.T) {
   571  	for i := range parseBaseTests {
   572  		test := &parseBaseTests[i]
   573  		testErr := test.errStub("ParseInt", test.arg)
   574  		_, err := ParseInt("0", test.arg, 0)
   575  		if !equalError(testErr, err) {
   576  			t.Errorf("ParseInt(\"0\", %v, 0) = 0, %v want 0, %v",
   577  				test.arg, err, testErr)
   578  		}
   579  	}
   580  }
   581  
   582  func TestParseUintBase(t *testing.T) {
   583  	for i := range parseBaseTests {
   584  		test := &parseBaseTests[i]
   585  		testErr := test.errStub("ParseUint", test.arg)
   586  		_, err := ParseUint("0", test.arg, 0)
   587  		if !equalError(testErr, err) {
   588  			t.Errorf("ParseUint(\"0\", %v, 0) = 0, %v want 0, %v",
   589  				test.arg, err, testErr)
   590  		}
   591  	}
   592  }
   593  
   594  func TestNumError(t *testing.T) {
   595  	for _, test := range numErrorTests {
   596  		err := &NumError{
   597  			Func: "ParseFloat",
   598  			Num:  test.num,
   599  			Err:  errors.New("failed"),
   600  		}
   601  		if got := err.Error(); got != test.want {
   602  			t.Errorf(`(&NumError{"ParseFloat", %q, "failed"}).Error() = %v, want %v`, test.num, got, test.want)
   603  		}
   604  	}
   605  }
   606  
   607  func TestNumErrorUnwrap(t *testing.T) {
   608  	err := &NumError{Err: ErrSyntax}
   609  	if !errors.Is(err, ErrSyntax) {
   610  		t.Error("errors.Is failed, wanted success")
   611  	}
   612  }
   613  
   614  func BenchmarkParseInt(b *testing.B) {
   615  	b.Run("Pos", func(b *testing.B) {
   616  		benchmarkParseInt(b, 1)
   617  	})
   618  	b.Run("Neg", func(b *testing.B) {
   619  		benchmarkParseInt(b, -1)
   620  	})
   621  }
   622  
   623  type benchCase struct {
   624  	name string
   625  	num  int64
   626  }
   627  
   628  func benchmarkParseInt(b *testing.B, neg int) {
   629  	cases := []benchCase{
   630  		{"7bit", 1<<7 - 1},
   631  		{"26bit", 1<<26 - 1},
   632  		{"31bit", 1<<31 - 1},
   633  		{"56bit", 1<<56 - 1},
   634  		{"63bit", 1<<63 - 1},
   635  	}
   636  	for _, cs := range cases {
   637  		b.Run(cs.name, func(b *testing.B) {
   638  			s := fmt.Sprintf("%d", cs.num*int64(neg))
   639  			for i := 0; i < b.N; i++ {
   640  				out, _ := ParseInt(s, 10, 64)
   641  				BenchSink += int(out)
   642  			}
   643  		})
   644  	}
   645  }
   646  
   647  func BenchmarkAtoi(b *testing.B) {
   648  	b.Run("Pos", func(b *testing.B) {
   649  		benchmarkAtoi(b, 1)
   650  	})
   651  	b.Run("Neg", func(b *testing.B) {
   652  		benchmarkAtoi(b, -1)
   653  	})
   654  }
   655  
   656  func benchmarkAtoi(b *testing.B, neg int) {
   657  	cases := []benchCase{
   658  		{"7bit", 1<<7 - 1},
   659  		{"26bit", 1<<26 - 1},
   660  		{"31bit", 1<<31 - 1},
   661  	}
   662  	if IntSize == 64 {
   663  		cases = append(cases, []benchCase{
   664  			{"56bit", 1<<56 - 1},
   665  			{"63bit", 1<<63 - 1},
   666  		}...)
   667  	}
   668  	for _, cs := range cases {
   669  		b.Run(cs.name, func(b *testing.B) {
   670  			s := fmt.Sprintf("%d", cs.num*int64(neg))
   671  			for i := 0; i < b.N; i++ {
   672  				out, _ := Atoi(s)
   673  				BenchSink += out
   674  			}
   675  		})
   676  	}
   677  }
   678  

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