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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2023 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package sysparams_test
import (
"errors"
"os"
"path"
"testing"
. "gopkg.in/check.v1"
"github.com/snapcore/snapd/dirs"
"github.com/snapcore/snapd/osutil"
"github.com/snapcore/snapd/snap/sysparams"
"github.com/snapcore/snapd/testutil"
)
func TestSysParamsTest(t *testing.T) { TestingT(t) }
type sysParamsTestSuite struct {
testutil.BaseTest
}
var _ = Suite(&sysParamsTestSuite{})
func (s *sysParamsTestSuite) SetUpTest(c *C) {
dirs.SetRootDir(c.MkDir())
}
func (s *sysParamsTestSuite) TestOpenNewEmpty(c *C) {
// Opening the file when it doesn't exist, should not create
// the file unless Write is called. And that an empty write
// provides empty members
sspPath := dirs.SnapSystemParamsUnder(dirs.GlobalRootDir)
c.Assert(os.MkdirAll(path.Dir(sspPath), 0755), IsNil)
ssp, err := sysparams.Open("")
c.Check(err, IsNil)
c.Assert(ssp, NotNil)
c.Check(sspPath, testutil.FileAbsent)
// Save the file
err = ssp.Write()
c.Check(err, IsNil)
// Verify the contents of the file, and that the file
// has the correct permissions
c.Assert(sspPath, testutil.FileEquals, "homedirs=\n")
stat, err := os.Stat(sspPath)
c.Assert(err, IsNil)
c.Check(stat.Mode(), Equals, os.FileMode(0644))
}
func (s *sysParamsTestSuite) TestWriteFailure(c *C) {
// Opening the file when it doesn't exist, should not create
// the file unless Write is called. And that an empty write
// provides empty members
ssp, err := sysparams.Open("")
c.Check(err, IsNil)
c.Assert(ssp, NotNil)
c.Check(dirs.SnapSystemParamsUnder(dirs.GlobalRootDir), testutil.FileAbsent)
r := sysparams.MockOsutilAtomicWriteFile(func(filename string, data []byte, perm os.FileMode, flags osutil.AtomicWriteFlags) error {
return errors.New("some write error")
})
defer r()
err = ssp.Write()
c.Assert(err, ErrorMatches, "cannot write system-params: some write error")
}
func (s *sysParamsTestSuite) TestOpenExisting(c *C) {
sspPath := dirs.SnapSystemParamsUnder(dirs.GlobalRootDir)
c.Assert(os.MkdirAll(path.Dir(sspPath), 0755), IsNil)
c.Assert(os.WriteFile(sspPath, []byte("homedirs=my-path/foo/bar,foo\n"), 0644), IsNil)
ssp, err := sysparams.Open("")
c.Check(err, IsNil)
c.Assert(ssp, NotNil)
c.Assert(ssp.Homedirs, Equals, "my-path/foo/bar,foo")
}
func (s *sysParamsTestSuite) TestOpenExistingEmpty(c *C) {
sspPath := dirs.SnapSystemParamsUnder(dirs.GlobalRootDir)
c.Assert(os.MkdirAll(path.Dir(sspPath), 0755), IsNil)
c.Assert(os.WriteFile(sspPath, []byte("\n"), 0644), IsNil)
ssp, err := sysparams.Open("")
c.Check(err, IsNil)
c.Check(ssp.Homedirs, Equals, "")
}
func (s *sysParamsTestSuite) TestOpenExistingWithInvalidContent(c *C) {
sspPath := dirs.SnapSystemParamsUnder(dirs.GlobalRootDir)
c.Assert(os.MkdirAll(path.Dir(sspPath), 0755), IsNil)
c.Assert(os.WriteFile(sspPath, []byte("xuifu93\n"), 0644), IsNil)
ssp, err := sysparams.Open("")
c.Check(err, ErrorMatches, `cannot parse system-params: invalid line: "xuifu93"`)
c.Check(ssp, IsNil)
}
func (s *sysParamsTestSuite) TestOpenExistingWithComments(c *C) {
sspPath := dirs.SnapSystemParamsUnder(dirs.GlobalRootDir)
c.Assert(os.MkdirAll(path.Dir(sspPath), 0755), IsNil)
c.Assert(os.WriteFile(sspPath, []byte("# this is a comment line\n"), 0644), IsNil)
ssp, err := sysparams.Open("")
c.Check(err, IsNil)
c.Check(ssp.Homedirs, Equals, "")
}
func (s *sysParamsTestSuite) TestOpenExistingWithDoubleEqual(c *C) {
sspPath := dirs.SnapSystemParamsUnder(dirs.GlobalRootDir)
c.Assert(os.MkdirAll(path.Dir(sspPath), 0755), IsNil)
c.Assert(os.WriteFile(sspPath, []byte("homedirs=my-path/foo/bar,foo=bar\n"), 0644), IsNil)
ssp, err := sysparams.Open("")
c.Check(err, IsNil)
c.Check(ssp.Homedirs, Equals, "my-path/foo/bar,foo=bar")
}
func (s *sysParamsTestSuite) TestOpenExistingWithDuplicateLine(c *C) {
contents := `
homedirs=foo/bar
homedirs=foo/baz
`
sspPath := dirs.SnapSystemParamsUnder(dirs.GlobalRootDir)
c.Assert(os.MkdirAll(path.Dir(sspPath), 0755), IsNil)
c.Assert(os.WriteFile(sspPath, []byte(contents), 0644), IsNil)
ssp, err := sysparams.Open("")
c.Check(err, ErrorMatches, `cannot parse system-params: duplicate entry found: "homedirs"`)
c.Check(ssp, IsNil)
}
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