github.com/geraldss/go/src@v0.0.0-20210511222824-ac7d0ebfc235/io/fs/glob_test.go (about)

     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  	"testing"
    12  )
    13  
    14  var globTests = []struct {
    15  	fs              FS
    16  	pattern, result string
    17  }{
    18  	{os.DirFS("."), "glob.go", "glob.go"},
    19  	{os.DirFS("."), "gl?b.go", "glob.go"},
    20  	{os.DirFS("."), "*", "glob.go"},
    21  	{os.DirFS(".."), "*/glob.go", "fs/glob.go"},
    22  }
    23  
    24  func TestGlob(t *testing.T) {
    25  	for _, tt := range globTests {
    26  		matches, err := Glob(tt.fs, tt.pattern)
    27  		if err != nil {
    28  			t.Errorf("Glob error for %q: %s", tt.pattern, err)
    29  			continue
    30  		}
    31  		if !contains(matches, tt.result) {
    32  			t.Errorf("Glob(%#q) = %#v want %v", tt.pattern, matches, tt.result)
    33  		}
    34  	}
    35  	for _, pattern := range []string{"no_match", "../*/no_match"} {
    36  		matches, err := Glob(os.DirFS("."), pattern)
    37  		if err != nil {
    38  			t.Errorf("Glob error for %q: %s", pattern, err)
    39  			continue
    40  		}
    41  		if len(matches) != 0 {
    42  			t.Errorf("Glob(%#q) = %#v want []", pattern, matches)
    43  		}
    44  	}
    45  }
    46  
    47  func TestGlobError(t *testing.T) {
    48  	bad := []string{`[]`, `nonexist/[]`}
    49  	for _, pattern := range bad {
    50  		_, err := Glob(os.DirFS("."), pattern)
    51  		if err != path.ErrBadPattern {
    52  			t.Errorf("Glob(fs, %#q) returned err=%v, want path.ErrBadPattern", pattern, err)
    53  		}
    54  	}
    55  }
    56  
    57  // contains reports whether vector contains the string s.
    58  func contains(vector []string, s string) bool {
    59  	for _, elem := range vector {
    60  		if elem == s {
    61  			return true
    62  		}
    63  	}
    64  	return false
    65  }
    66  
    67  type globOnly struct{ GlobFS }
    68  
    69  func (globOnly) Open(name string) (File, error) { return nil, ErrNotExist }
    70  
    71  func TestGlobMethod(t *testing.T) {
    72  	check := func(desc string, names []string, err error) {
    73  		t.Helper()
    74  		if err != nil || len(names) != 1 || names[0] != "hello.txt" {
    75  			t.Errorf("Glob(%s) = %v, %v, want %v, nil", desc, names, err, []string{"hello.txt"})
    76  		}
    77  	}
    78  
    79  	// Test that ReadDir uses the method when present.
    80  	names, err := Glob(globOnly{testFsys}, "*.txt")
    81  	check("readDirOnly", names, err)
    82  
    83  	// Test that ReadDir uses Open when the method is not present.
    84  	names, err = Glob(openOnly{testFsys}, "*.txt")
    85  	check("openOnly", names, err)
    86  }