github.com/amarpal/go-tools@v0.0.0-20240422043104-40142f59f616/simple/s1017/testdata/src/example.com/CheckTrim/trim.go (about)

     1  package pkg
     2  
     3  import (
     4  	"bytes"
     5  	"strings"
     6  )
     7  
     8  func foo(s string) int { return 0 }
     9  func gen() string {
    10  	return ""
    11  }
    12  
    13  func fn() {
    14  	const s1 = "a string value"
    15  	var s2 = "a string value"
    16  	const n = 14
    17  
    18  	var id1 = "a string value"
    19  	var id2 string
    20  	if strings.HasPrefix(id1, s1) { //@ diag(re`should replace.*with.*strings\.TrimPrefix`)
    21  		id1 = id1[len(s1):]
    22  	}
    23  
    24  	if strings.HasPrefix(id1, s1) { //@ diag(re`should replace.*with.*strings\.TrimPrefix`)
    25  		id1 = strings.TrimPrefix(id1, s1)
    26  	}
    27  
    28  	if strings.HasPrefix(id1, s1) {
    29  		id1 = strings.TrimPrefix(id1, s2)
    30  	}
    31  
    32  	if strings.Contains(id1, s1) { //@ diag(re`should replace.*with.*strings\.Replace`)
    33  		id1 = strings.Replace(id1, s1, "something", 123)
    34  	}
    35  
    36  	if strings.HasSuffix(id1, s2) { //@ diag(re`should replace.*with.*strings\.TrimSuffix`)
    37  		id1 = id1[:len(id1)-len(s2)]
    38  	}
    39  
    40  	var x, y []string
    41  	var i int
    42  	if strings.HasPrefix(x[i], s1) { //@ diag(re`should replace.*with.*strings\.TrimPrefix`)
    43  		x[i] = x[i][len(s1):]
    44  	}
    45  
    46  	if strings.HasPrefix(x[i], y[i]) { //@ diag(re`should replace.*with.*strings\.TrimPrefix`)
    47  		x[i] = x[i][len(y[i]):]
    48  	}
    49  
    50  	var t struct{ x string }
    51  	if strings.HasPrefix(t.x, s1) { //@ diag(re`should replace.*with.*strings\.TrimPrefix`)
    52  		t.x = t.x[len(s1):]
    53  	}
    54  
    55  	if strings.HasPrefix(id1, "test") { //@ diag(re`should replace.*with.*strings\.TrimPrefix`)
    56  		id1 = id1[len("test"):]
    57  	}
    58  
    59  	if strings.HasPrefix(id1, "test") { //@ diag(re`should replace.*with.*strings\.TrimPrefix`)
    60  		id1 = id1[4:]
    61  	}
    62  
    63  	if strings.HasPrefix(id1, s1) { // not allowed, 14 and s1 aren't obviously connected
    64  		id1 = id1[14:]
    65  	}
    66  
    67  	if strings.HasPrefix(id1, s1) { // not allowed, s1 and n aren't obviously connected
    68  		id1 = id1[n:]
    69  	}
    70  
    71  	var b1, b2 []byte
    72  	if bytes.HasPrefix(b1, b2) { //@ diag(re`should replace.*with.*bytes\.TrimPrefix`)
    73  		b1 = b1[len(b2):]
    74  	}
    75  
    76  	id3 := s2
    77  	if strings.HasPrefix(id1, id3) { //@ diag(re`should replace.*with.*strings\.TrimPrefix`)
    78  		id1 = id1[len(id3):]
    79  	}
    80  
    81  	if strings.HasSuffix(id1, s2) {
    82  		id1 = id1[:len(id1)+len(s2)] // wrong operator
    83  	}
    84  
    85  	if strings.HasSuffix(id1, s2) {
    86  		id1 = id1[:len(s2)-len(id1)] // wrong math
    87  	}
    88  
    89  	if strings.HasSuffix(id1, s2) {
    90  		id1 = id1[:len(id1)-len(id1)] // wrong string length
    91  	}
    92  
    93  	if strings.HasPrefix(id1, gen()) {
    94  		id1 = id1[len(gen()):] // dynamic id3
    95  	}
    96  
    97  	if strings.HasPrefix(id1, s1) {
    98  		id1 = id1[foo(s1):] // wrong function
    99  	}
   100  
   101  	if strings.HasPrefix(id1, s1) {
   102  		id1 = id1[len(id1):] // len() on wrong value
   103  	}
   104  
   105  	if strings.HasPrefix(id1, "test") {
   106  		id1 = id1[5:] // wrong length
   107  	}
   108  
   109  	if strings.HasPrefix(id1, s1) {
   110  		id1 = id1[len(s1)+1:] // wrong length due to math
   111  	}
   112  
   113  	if strings.HasPrefix(id1, s1) {
   114  		id2 = id1[len(s1):] // assigning to the wrong variable
   115  	}
   116  
   117  	if strings.HasPrefix(id1, s1) {
   118  		id1 = id1[len(s1):15] // has a max
   119  	}
   120  
   121  	if strings.HasPrefix(id1, s1) {
   122  		id1 = id2[len(s1):] // assigning the wrong value
   123  	}
   124  
   125  	if strings.HasPrefix(id1, s1) {
   126  		id1 = id1[len(s1):]
   127  		id1 += "" // doing more work in the if
   128  	}
   129  
   130  	if strings.HasPrefix(id1, s1) {
   131  		id1 = id1[len(s1):]
   132  	} else {
   133  		id1 = "game over" // else branch
   134  	}
   135  
   136  	if strings.HasPrefix(id1, s1) {
   137  		// the conditional is guarding additional code
   138  		id1 = id1[len(s1):]
   139  		println(id1)
   140  	}
   141  
   142  	if strings.Contains(id1, s1) {
   143  		id1 = id1[:]
   144  	}
   145  }
   146  
   147  func fn2() {
   148  	var s string
   149  	const id = ".json"
   150  
   151  	if strings.HasSuffix(s, ".json") { //@ diag(re`should replace.*with.*strings\.TrimSuffix`)
   152  		s = strings.TrimSuffix(s, ".json")
   153  	}
   154  
   155  	if strings.HasSuffix(s, ".json") { //@ diag(re`should replace.*with.*strings\.TrimSuffix`)
   156  		s = s[:len(s)-len(".json")]
   157  	}
   158  
   159  	if strings.HasSuffix(s, ".json") { //@ diag(re`should replace.*with.*strings\.TrimSuffix`)
   160  		s = s[:len(s)-5]
   161  	}
   162  
   163  	if strings.HasSuffix(s, id) {
   164  		s = s[:len(s)-5] // second argument of HasSuffix it not a string literal
   165  	}
   166  
   167  	if strings.HasSuffix(s, ".json") {
   168  		s = s[:len(s)-4] // wrong length
   169  	}
   170  }
   171  
   172  func fn3() {
   173  	const s1 = "a string value"
   174  
   175  	var id1 = "a string value"
   176  	len := func(string) int { return 0 } // don't accept non-builtin definition of len
   177  	if strings.HasPrefix(id1, s1) {
   178  		id1 = id1[len(s1):]
   179  	}
   180  
   181  	if strings.HasSuffix(id1, s1) {
   182  		id1 = id1[:len(id1)-len(s1)]
   183  	}
   184  }