glob_test.go

Documentation: io/fs

     1  // Copyright 2020 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 fs_test
     6  
     7  import (
     8  	. "io/fs"
     9  	"os"
    10  	"path"
    11  	"slices"
    12  	"strings"
    13  	"testing"
    14  )
    15  
    16  var globTests = []struct {
    17  	fs              FS
    18  	pattern, result string
    19  }{
    20  	{os.DirFS("."), "glob.go", "glob.go"},
    21  	{os.DirFS("."), "gl?b.go", "glob.go"},
    22  	{os.DirFS("."), `gl\ob.go`, "glob.go"},
    23  	{os.DirFS("."), "*", "glob.go"},
    24  	{os.DirFS(".."), "*/glob.go", "fs/glob.go"},
    25  }
    26  
    27  func TestGlob(t *testing.T) {
    28  	for _, tt := range globTests {
    29  		matches, err := Glob(tt.fs, tt.pattern)
    30  		if err != nil {
    31  			t.Errorf("Glob error for %q: %s", tt.pattern, err)
    32  			continue
    33  		}
    34  		if !slices.Contains(matches, tt.result) {
    35  			t.Errorf("Glob(%#q) = %#v want %v", tt.pattern, matches, tt.result)
    36  		}
    37  	}
    38  	for _, pattern := range []string{"no_match", "../*/no_match", `\*`} {
    39  		matches, err := Glob(os.DirFS("."), pattern)
    40  		if err != nil {
    41  			t.Errorf("Glob error for %q: %s", pattern, err)
    42  			continue
    43  		}
    44  		if len(matches) != 0 {
    45  			t.Errorf("Glob(%#q) = %#v want []", pattern, matches)
    46  		}
    47  	}
    48  }
    49  
    50  func TestGlobError(t *testing.T) {
    51  	bad := []string{`[]`, `nonexist/[]`}
    52  	for _, pattern := range bad {
    53  		_, err := Glob(os.DirFS("."), pattern)
    54  		if err != path.ErrBadPattern {
    55  			t.Errorf("Glob(fs, %#q) returned err=%v, want path.ErrBadPattern", pattern, err)
    56  		}
    57  	}
    58  }
    59  
    60  func TestCVE202230630(t *testing.T) {
    61  	// Prior to CVE-2022-30630, a stack exhaustion would occur given a large
    62  	// number of separators. There is now a limit of 10,000.
    63  	_, err := Glob(os.DirFS("."), "/*"+strings.Repeat("/", 10001))
    64  	if err != path.ErrBadPattern {
    65  		t.Fatalf("Glob returned err=%v, want %v", err, path.ErrBadPattern)
    66  	}
    67  }
    68  
    69  type globOnly struct{ GlobFS }
    70  
    71  func (globOnly) Open(name string) (File, error) { return nil, ErrNotExist }
    72  
    73  func TestGlobMethod(t *testing.T) {
    74  	check := func(desc string, names []string, err error) {
    75  		t.Helper()
    76  		if err != nil || len(names) != 1 || names[0] != "hello.txt" {
    77  			t.Errorf("Glob(%s) = %v, %v, want %v, nil", desc, names, err, []string{"hello.txt"})
    78  		}
    79  	}
    80  
    81  	// Test that ReadDir uses the method when present.
    82  	names, err := Glob(globOnly{testFsys}, "*.txt")
    83  	check("readDirOnly", names, err)
    84  
    85  	// Test that ReadDir uses Open when the method is not present.
    86  	names, err = Glob(openOnly{testFsys}, "*.txt")
    87  	check("openOnly", names, err)
    88  }
    89
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