example_test.go

     1  // Copyright 2026 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 fstest_test
     6  
     7  import (
     8  	"fmt"
     9  	"io/fs"
    10  	"log"
    11  	"testing/fstest"
    12  )
    13  
    14  func ExampleMapFS() {
    15  	fsys := fstest.MapFS{
    16  		"hello.txt": {
    17  			Data: []byte("hello"),
    18  		},
    19  		"docs/readme.txt": {
    20  			Data: []byte("documentation"),
    21  		},
    22  		"readme.link": {
    23  			Data: []byte("docs/readme.txt"),
    24  			Mode: fs.ModeSymlink,
    25  		},
    26  	}
    27  
    28  	target, err := fs.ReadLink(fsys, "readme.link")
    29  	if err != nil {
    30  		log.Fatal(err)
    31  	}
    32  	fmt.Println("readme.link ->", target)
    33  
    34  	data, err := fs.ReadFile(fsys, "readme.link")
    35  	if err != nil {
    36  		log.Fatal(err)
    37  	}
    38  	fmt.Println(string(data))
    39  
    40  	entries, err := fs.ReadDir(fsys, ".")
    41  	if err != nil {
    42  		log.Fatal(err)
    43  	}
    44  	for _, entry := range entries {
    45  		fmt.Println(entry.Name())
    46  	}
    47  
    48  	// Output:
    49  	// readme.link -> docs/readme.txt
    50  	// documentation
    51  	// docs
    52  	// hello.txt
    53  	// readme.link
    54  }
    55
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