github.com/elfadel/cilium@v1.6.12/pkg/pidfile/pidfile_test.go (about)

     1  // Copyright 2018 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // +build !privileged_tests
    16  
    17  package pidfile
    18  
    19  import (
    20  	"fmt"
    21  	"io/ioutil"
    22  	"os"
    23  	"os/exec"
    24  	"testing"
    25  
    26  	"github.com/cilium/cilium/pkg/checker"
    27  
    28  	. "gopkg.in/check.v1"
    29  )
    30  
    31  const (
    32  	path = "/tmp/cilium-test-pidfile"
    33  )
    34  
    35  // Hook up gocheck into the "go test" runner.
    36  func Test(t *testing.T) {
    37  	TestingT(t)
    38  }
    39  
    40  type PidfileTestSuite struct{}
    41  
    42  var _ = Suite(&PidfileTestSuite{})
    43  
    44  func (s *PidfileTestSuite) TestWrite(c *C) {
    45  	err := Write(path)
    46  	c.Assert(err, IsNil)
    47  	defer Remove(path)
    48  
    49  	content, err := ioutil.ReadFile(path)
    50  	c.Assert(err, IsNil)
    51  	c.Assert(content, checker.DeepEquals, []byte(fmt.Sprintf("%d\n", os.Getpid())))
    52  }
    53  
    54  func (s *PidfileTestSuite) TestKill(c *C) {
    55  	cmd := exec.Command("sleep", "inf")
    56  	err := cmd.Start()
    57  	c.Assert(err, IsNil)
    58  
    59  	err = write(path, cmd.Process.Pid)
    60  	c.Assert(err, IsNil)
    61  	defer Remove(path)
    62  
    63  	pid, err := Kill(path)
    64  	c.Assert(err, IsNil)
    65  	c.Assert(pid, Not(Equals), 0)
    66  
    67  	err = cmd.Wait()
    68  	c.Assert(err, ErrorMatches, "signal: killed")
    69  }
    70  
    71  func (s *PidfileTestSuite) TestKillAlreadyFinished(c *C) {
    72  	cmd := exec.Command("sleep", "0")
    73  	err := cmd.Start()
    74  	c.Assert(err, IsNil)
    75  
    76  	err = write(path, cmd.Process.Pid)
    77  	c.Assert(err, IsNil)
    78  	defer Remove(path)
    79  
    80  	err = cmd.Wait()
    81  	c.Assert(err, IsNil)
    82  
    83  	pid, err := Kill(path)
    84  	c.Assert(err, IsNil)
    85  	c.Assert(pid, Equals, 0)
    86  }
    87  
    88  func (s *PidfileTestSuite) TestKillPidfileNotExist(c *C) {
    89  	_, err := Kill("/tmp/cilium-foo-bar-some-not-existing-file")
    90  	c.Assert(err, IsNil)
    91  }
    92  
    93  func (s *PidfileTestSuite) TestKillPidfilePermissionDenied(c *C) {
    94  	err := ioutil.WriteFile(path, []byte("foobar\n"), 0000)
    95  	c.Assert(err, IsNil)
    96  	defer Remove(path)
    97  
    98  	_, err = Kill(path)
    99  	c.Assert(err, ErrorMatches, ".* permission denied")
   100  }
   101  
   102  func (s *PidfileTestSuite) TestKillFailedParsePid(c *C) {
   103  	err := ioutil.WriteFile(path, []byte("foobar\n"), 0644)
   104  	c.Assert(err, IsNil)
   105  	defer Remove(path)
   106  
   107  	_, err = Kill(path)
   108  	c.Assert(err, ErrorMatches, "failed to parse pid .*")
   109  }