github.com/rigado/snapd@v2.42.5-go-mod+incompatible/snap/squashfs/export_test.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2018 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package squashfs
    21  
    22  import (
    23  	"os"
    24  	"os/exec"
    25  	"time"
    26  
    27  	"gopkg.in/check.v1"
    28  )
    29  
    30  var (
    31  	FromRaw                   = fromRaw
    32  	NewUnsquashfsStderrWriter = newUnsquashfsStderrWriter
    33  )
    34  
    35  func (s stat) User() string  { return s.user }
    36  func (s stat) Group() string { return s.group }
    37  
    38  func MockLink(newLink func(string, string) error) (restore func()) {
    39  	oldLink := osLink
    40  	osLink = newLink
    41  	return func() {
    42  		osLink = oldLink
    43  	}
    44  }
    45  
    46  func MockCommandFromSystemSnap(f func(string, ...string) (*exec.Cmd, error)) (restore func()) {
    47  	oldCommandFromSystemSnap := cmdutilCommandFromSystemSnap
    48  	cmdutilCommandFromSystemSnap = f
    49  	return func() {
    50  		cmdutilCommandFromSystemSnap = oldCommandFromSystemSnap
    51  	}
    52  }
    53  
    54  // Alike compares to os.FileInfo to determine if they are sufficiently
    55  // alike to say they refer to the same thing.
    56  func Alike(a, b os.FileInfo, c *check.C, comment check.CommentInterface) {
    57  	c.Check(a, check.NotNil, comment)
    58  	c.Check(b, check.NotNil, comment)
    59  	if a == nil || b == nil {
    60  		return
    61  	}
    62  
    63  	// the .Name() of the root will be different on non-squashfs things
    64  	_, asq := a.(*stat)
    65  	_, bsq := b.(*stat)
    66  	if !((asq && a.Name() == "/") || (bsq && b.Name() == "/")) {
    67  		c.Check(a.Name(), check.Equals, b.Name(), comment)
    68  	}
    69  
    70  	c.Check(a.Mode(), check.Equals, b.Mode(), comment)
    71  	if a.Mode().IsRegular() {
    72  		c.Check(a.Size(), check.Equals, b.Size(), comment)
    73  	}
    74  	am := a.ModTime().UTC().Truncate(time.Minute)
    75  	bm := b.ModTime().UTC().Truncate(time.Minute)
    76  	c.Check(am.Equal(bm), check.Equals, true, check.Commentf("%s != %s (%s)", am, bm, comment))
    77  }