github.com/shiroyuki/docker@v1.9.0/pkg/parsers/operatingsystem/operatingsystem_test.go (about)

     1  package operatingsystem
     2  
     3  import (
     4  	"io/ioutil"
     5  	"os"
     6  	"path/filepath"
     7  	"testing"
     8  )
     9  
    10  func TestGetOperatingSystem(t *testing.T) {
    11  	var (
    12  		backup       = etcOsRelease
    13  		ubuntuTrusty = []byte(`NAME="Ubuntu"
    14  VERSION="14.04, Trusty Tahr"
    15  ID=ubuntu
    16  ID_LIKE=debian
    17  PRETTY_NAME="Ubuntu 14.04 LTS"
    18  VERSION_ID="14.04"
    19  HOME_URL="http://www.ubuntu.com/"
    20  SUPPORT_URL="http://help.ubuntu.com/"
    21  BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"`)
    22  		gentoo = []byte(`NAME=Gentoo
    23  ID=gentoo
    24  PRETTY_NAME="Gentoo/Linux"
    25  ANSI_COLOR="1;32"
    26  HOME_URL="http://www.gentoo.org/"
    27  SUPPORT_URL="http://www.gentoo.org/main/en/support.xml"
    28  BUG_REPORT_URL="https://bugs.gentoo.org/"
    29  `)
    30  		noPrettyName = []byte(`NAME="Ubuntu"
    31  VERSION="14.04, Trusty Tahr"
    32  ID=ubuntu
    33  ID_LIKE=debian
    34  VERSION_ID="14.04"
    35  HOME_URL="http://www.ubuntu.com/"
    36  SUPPORT_URL="http://help.ubuntu.com/"
    37  BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"`)
    38  	)
    39  
    40  	dir := os.TempDir()
    41  	etcOsRelease = filepath.Join(dir, "etcOsRelease")
    42  
    43  	defer func() {
    44  		os.Remove(etcOsRelease)
    45  		etcOsRelease = backup
    46  	}()
    47  
    48  	for expect, osRelease := range map[string][]byte{
    49  		"Ubuntu 14.04 LTS": ubuntuTrusty,
    50  		"Gentoo/Linux":     gentoo,
    51  		"":                 noPrettyName,
    52  	} {
    53  		if err := ioutil.WriteFile(etcOsRelease, osRelease, 0600); err != nil {
    54  			t.Fatalf("failed to write to %s: %v", etcOsRelease, err)
    55  		}
    56  		s, err := GetOperatingSystem()
    57  		if s != expect {
    58  			if expect == "" {
    59  				t.Fatalf("Expected error 'PRETTY_NAME not found', but got %v", err)
    60  			} else {
    61  				t.Fatalf("Expected '%s', but got '%s'. Err=%v", expect, s, err)
    62  			}
    63  		}
    64  	}
    65  }
    66  
    67  func TestIsContainerized(t *testing.T) {
    68  	var (
    69  		backup                      = proc1Cgroup
    70  		nonContainerizedProc1Cgroup = []byte(`14:name=systemd:/
    71  13:hugetlb:/
    72  12:net_prio:/
    73  11:perf_event:/
    74  10:bfqio:/
    75  9:blkio:/
    76  8:net_cls:/
    77  7:freezer:/
    78  6:devices:/
    79  5:memory:/
    80  4:cpuacct:/
    81  3:cpu:/
    82  2:cpuset:/
    83  `)
    84  		containerizedProc1Cgroup = []byte(`9:perf_event:/docker/3cef1b53c50b0fa357d994f8a1a8cd783c76bbf4f5dd08b226e38a8bd331338d
    85  8:blkio:/docker/3cef1b53c50b0fa357d994f8a1a8cd783c76bbf4f5dd08b226e38a8bd331338d
    86  7:net_cls:/
    87  6:freezer:/docker/3cef1b53c50b0fa357d994f8a1a8cd783c76bbf4f5dd08b226e38a8bd331338d
    88  5:devices:/docker/3cef1b53c50b0fa357d994f8a1a8cd783c76bbf4f5dd08b226e38a8bd331338d
    89  4:memory:/docker/3cef1b53c50b0fa357d994f8a1a8cd783c76bbf4f5dd08b226e38a8bd331338d
    90  3:cpuacct:/docker/3cef1b53c50b0fa357d994f8a1a8cd783c76bbf4f5dd08b226e38a8bd331338d
    91  2:cpu:/docker/3cef1b53c50b0fa357d994f8a1a8cd783c76bbf4f5dd08b226e38a8bd331338d
    92  1:cpuset:/`)
    93  	)
    94  
    95  	dir := os.TempDir()
    96  	proc1Cgroup = filepath.Join(dir, "proc1Cgroup")
    97  
    98  	defer func() {
    99  		os.Remove(proc1Cgroup)
   100  		proc1Cgroup = backup
   101  	}()
   102  
   103  	if err := ioutil.WriteFile(proc1Cgroup, nonContainerizedProc1Cgroup, 0600); err != nil {
   104  		t.Fatalf("failed to write to %s: %v", proc1Cgroup, err)
   105  	}
   106  	inContainer, err := IsContainerized()
   107  	if err != nil {
   108  		t.Fatal(err)
   109  	}
   110  	if inContainer {
   111  		t.Fatal("Wrongly assuming containerized")
   112  	}
   113  
   114  	if err := ioutil.WriteFile(proc1Cgroup, containerizedProc1Cgroup, 0600); err != nil {
   115  		t.Fatalf("failed to write to %s: %v", proc1Cgroup, err)
   116  	}
   117  	inContainer, err = IsContainerized()
   118  	if err != nil {
   119  		t.Fatal(err)
   120  	}
   121  	if !inContainer {
   122  		t.Fatal("Wrongly assuming non-containerized")
   123  	}
   124  }