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Current Path: /opt/golang/1.22.0/src/io/fs

📁 ..
📄 example_test.go(462 B)
📄 format.go(1.75 KB)
📄 format_test.go(2.51 KB)
📄 fs.go(9.39 KB)
📄 fs_test.go(847 B)
📄 glob.go(3.14 KB)
📄 glob_test.go(2.52 KB)
📄 readdir.go(1.86 KB)
📄 readdir_test.go(2.62 KB)
📄 readfile.go(1.79 KB)
📄 readfile_test.go(1.82 KB)
📄 stat.go(803 B)
📄 stat_test.go(949 B)
📄 sub.go(3.62 KB)
📄 sub_test.go(1.5 KB)
📄 walk.go(4.69 KB)
📄 walk_test.go(3.04 KB)

Editing: readfile_test.go

// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package fs_test

import (
	. "io/fs"
	"os"
	"testing"
	"testing/fstest"
	"time"
)

var testFsys = fstest.MapFS{
	"hello.txt": {
		Data:    []byte("hello, world"),
		Mode:    0456,
		ModTime: time.Now(),
		Sys:     &sysValue,
	},
	"sub/goodbye.txt": {
		Data:    []byte("goodbye, world"),
		Mode:    0456,
		ModTime: time.Now(),
		Sys:     &sysValue,
	},
}

var sysValue int

type readFileOnly struct{ ReadFileFS }

func (readFileOnly) Open(name string) (File, error) { return nil, ErrNotExist }

type openOnly struct{ FS }

func TestReadFile(t *testing.T) {
	// Test that ReadFile uses the method when present.
	data, err := ReadFile(readFileOnly{testFsys}, "hello.txt")
	if string(data) != "hello, world" || err != nil {
		t.Fatalf(`ReadFile(readFileOnly, "hello.txt") = %q, %v, want %q, nil`, data, err, "hello, world")
	}

// Test that ReadFile uses Open when the method is not present.
	data, err = ReadFile(openOnly{testFsys}, "hello.txt")
	if string(data) != "hello, world" || err != nil {
		t.Fatalf(`ReadFile(openOnly, "hello.txt") = %q, %v, want %q, nil`, data, err, "hello, world")
	}

// Test that ReadFile on Sub of . works (sub_test checks non-trivial subs).
	sub, err := Sub(testFsys, ".")
	if err != nil {
		t.Fatal(err)
	}
	data, err = ReadFile(sub, "hello.txt")
	if string(data) != "hello, world" || err != nil {
		t.Fatalf(`ReadFile(sub(.), "hello.txt") = %q, %v, want %q, nil`, data, err, "hello, world")
	}
}

func TestReadFilePath(t *testing.T) {
	fsys := os.DirFS(t.TempDir())
	_, err1 := ReadFile(fsys, "non-existent")
	_, err2 := ReadFile(struct{ FS }{fsys}, "non-existent")
	if s1, s2 := errorPath(err1), errorPath(err2); s1 != s2 {
		t.Fatalf("s1: %s != s2: %s", s1, s2)
	}
}

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Editing: readfile_test.go

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