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

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