github.com/xuyutom/docker@v1.6.0/pkg/networkfs/etchosts/etchosts_test.go (about)

     1  package etchosts
     2  
     3  import (
     4  	"bytes"
     5  	"io/ioutil"
     6  	"os"
     7  	"testing"
     8  )
     9  
    10  func TestBuildDefault(t *testing.T) {
    11  	file, err := ioutil.TempFile("", "")
    12  	if err != nil {
    13  		t.Fatal(err)
    14  	}
    15  	defer os.Remove(file.Name())
    16  
    17  	// check that /etc/hosts has consistent ordering
    18  	for i := 0; i <= 5; i++ {
    19  		err = Build(file.Name(), "", "", "", nil)
    20  		if err != nil {
    21  			t.Fatal(err)
    22  		}
    23  
    24  		content, err := ioutil.ReadFile(file.Name())
    25  		if err != nil {
    26  			t.Fatal(err)
    27  		}
    28  		expected := "127.0.0.1\tlocalhost\n::1\tlocalhost ip6-localhost ip6-loopback\nfe00::0\tip6-localnet\nff00::0\tip6-mcastprefix\nff02::1\tip6-allnodes\nff02::2\tip6-allrouters\n"
    29  
    30  		if expected != string(content) {
    31  			t.Fatalf("Expected to find '%s' got '%s'", expected, content)
    32  		}
    33  	}
    34  }
    35  
    36  func TestBuildHostnameDomainname(t *testing.T) {
    37  	file, err := ioutil.TempFile("", "")
    38  	if err != nil {
    39  		t.Fatal(err)
    40  	}
    41  	defer os.Remove(file.Name())
    42  
    43  	err = Build(file.Name(), "10.11.12.13", "testhostname", "testdomainname", nil)
    44  	if err != nil {
    45  		t.Fatal(err)
    46  	}
    47  
    48  	content, err := ioutil.ReadFile(file.Name())
    49  	if err != nil {
    50  		t.Fatal(err)
    51  	}
    52  
    53  	if expected := "10.11.12.13\ttesthostname.testdomainname testhostname\n"; !bytes.Contains(content, []byte(expected)) {
    54  		t.Fatalf("Expected to find '%s' got '%s'", expected, content)
    55  	}
    56  }
    57  
    58  func TestBuildHostname(t *testing.T) {
    59  	file, err := ioutil.TempFile("", "")
    60  	if err != nil {
    61  		t.Fatal(err)
    62  	}
    63  	defer os.Remove(file.Name())
    64  
    65  	err = Build(file.Name(), "10.11.12.13", "testhostname", "", nil)
    66  	if err != nil {
    67  		t.Fatal(err)
    68  	}
    69  
    70  	content, err := ioutil.ReadFile(file.Name())
    71  	if err != nil {
    72  		t.Fatal(err)
    73  	}
    74  
    75  	if expected := "10.11.12.13\ttesthostname\n"; !bytes.Contains(content, []byte(expected)) {
    76  		t.Fatalf("Expected to find '%s' got '%s'", expected, content)
    77  	}
    78  }
    79  
    80  func TestBuildNoIP(t *testing.T) {
    81  	file, err := ioutil.TempFile("", "")
    82  	if err != nil {
    83  		t.Fatal(err)
    84  	}
    85  	defer os.Remove(file.Name())
    86  
    87  	err = Build(file.Name(), "", "testhostname", "", nil)
    88  	if err != nil {
    89  		t.Fatal(err)
    90  	}
    91  
    92  	content, err := ioutil.ReadFile(file.Name())
    93  	if err != nil {
    94  		t.Fatal(err)
    95  	}
    96  
    97  	if expected := ""; !bytes.Contains(content, []byte(expected)) {
    98  		t.Fatalf("Expected to find '%s' got '%s'", expected, content)
    99  	}
   100  }
   101  
   102  func TestUpdate(t *testing.T) {
   103  	file, err := ioutil.TempFile("", "")
   104  	if err != nil {
   105  		t.Fatal(err)
   106  	}
   107  	defer os.Remove(file.Name())
   108  
   109  	if err := Build(file.Name(), "10.11.12.13", "testhostname", "testdomainname", nil); err != nil {
   110  		t.Fatal(err)
   111  	}
   112  
   113  	content, err := ioutil.ReadFile(file.Name())
   114  	if err != nil {
   115  		t.Fatal(err)
   116  	}
   117  
   118  	if expected := "10.11.12.13\ttesthostname.testdomainname testhostname\n"; !bytes.Contains(content, []byte(expected)) {
   119  		t.Fatalf("Expected to find '%s' got '%s'", expected, content)
   120  	}
   121  
   122  	if err := Update(file.Name(), "1.1.1.1", "testhostname"); err != nil {
   123  		t.Fatal(err)
   124  	}
   125  
   126  	content, err = ioutil.ReadFile(file.Name())
   127  	if err != nil {
   128  		t.Fatal(err)
   129  	}
   130  
   131  	if expected := "1.1.1.1\ttesthostname.testdomainname testhostname\n"; !bytes.Contains(content, []byte(expected)) {
   132  		t.Fatalf("Expected to find '%s' got '%s'", expected, content)
   133  	}
   134  }