user_test.go

Documentation: os/user

     1  // Copyright 2011 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package user
     6  
     7  import (
     8  	"os"
     9  	"testing"
    10  )
    11  
    12  var (
    13  	hasCgo  = false
    14  	hasUSER = os.Getenv("USER") != ""
    15  	hasHOME = os.Getenv("HOME") != ""
    16  )
    17  
    18  func checkUser(t *testing.T) {
    19  	t.Helper()
    20  	if !userImplemented {
    21  		t.Skip("user: not implemented; skipping tests")
    22  	}
    23  }
    24  
    25  func TestCurrent(t *testing.T) {
    26  	old := userBuffer
    27  	defer func() {
    28  		userBuffer = old
    29  	}()
    30  	userBuffer = 1 // force use of retry code
    31  	u, err := Current()
    32  	if err != nil {
    33  		if hasCgo || (hasUSER && hasHOME) {
    34  			t.Fatalf("Current: %v (got %#v)", err, u)
    35  		} else {
    36  			t.Skipf("skipping: %v", err)
    37  		}
    38  	}
    39  	if u.HomeDir == "" {
    40  		t.Errorf("didn't get a HomeDir")
    41  	}
    42  	if u.Username == "" {
    43  		t.Errorf("didn't get a username")
    44  	}
    45  }
    46  
    47  func BenchmarkCurrent(b *testing.B) {
    48  	for i := 0; i < b.N; i++ {
    49  		Current()
    50  	}
    51  }
    52  
    53  func compare(t *testing.T, want, got *User) {
    54  	if want.Uid != got.Uid {
    55  		t.Errorf("got Uid=%q; want %q", got.Uid, want.Uid)
    56  	}
    57  	if want.Username != got.Username {
    58  		t.Errorf("got Username=%q; want %q", got.Username, want.Username)
    59  	}
    60  	if want.Name != got.Name {
    61  		t.Errorf("got Name=%q; want %q", got.Name, want.Name)
    62  	}
    63  	if want.HomeDir != got.HomeDir {
    64  		t.Errorf("got HomeDir=%q; want %q", got.HomeDir, want.HomeDir)
    65  	}
    66  	if want.Gid != got.Gid {
    67  		t.Errorf("got Gid=%q; want %q", got.Gid, want.Gid)
    68  	}
    69  }
    70  
    71  func TestLookup(t *testing.T) {
    72  	checkUser(t)
    73  
    74  	want, err := Current()
    75  	if err != nil {
    76  		if hasCgo || (hasUSER && hasHOME) {
    77  			t.Fatalf("Current: %v", err)
    78  		} else {
    79  			t.Skipf("skipping: %v", err)
    80  		}
    81  	}
    82  
    83  	// TODO: Lookup() has a fast path that calls Current() and returns if the
    84  	// usernames match, so this test does not exercise very much. It would be
    85  	// good to try and test finding a different user than the current user.
    86  	got, err := Lookup(want.Username)
    87  	if err != nil {
    88  		t.Fatalf("Lookup: %v", err)
    89  	}
    90  	compare(t, want, got)
    91  }
    92  
    93  func TestLookupId(t *testing.T) {
    94  	checkUser(t)
    95  
    96  	want, err := Current()
    97  	if err != nil {
    98  		if hasCgo || (hasUSER && hasHOME) {
    99  			t.Fatalf("Current: %v", err)
   100  		} else {
   101  			t.Skipf("skipping: %v", err)
   102  		}
   103  	}
   104  
   105  	got, err := LookupId(want.Uid)
   106  	if err != nil {
   107  		t.Fatalf("LookupId: %v", err)
   108  	}
   109  	compare(t, want, got)
   110  }
   111  
   112  func checkGroup(t *testing.T) {
   113  	t.Helper()
   114  	if !groupImplemented {
   115  		t.Skip("user: group not implemented; skipping test")
   116  	}
   117  }
   118  
   119  func TestLookupGroup(t *testing.T) {
   120  	old := groupBuffer
   121  	defer func() {
   122  		groupBuffer = old
   123  	}()
   124  	groupBuffer = 1 // force use of retry code
   125  	checkGroup(t)
   126  
   127  	user, err := Current()
   128  	if err != nil {
   129  		if hasCgo || (hasUSER && hasHOME) {
   130  			t.Fatalf("Current: %v", err)
   131  		} else {
   132  			t.Skipf("skipping: %v", err)
   133  		}
   134  	}
   135  
   136  	g1, err := LookupGroupId(user.Gid)
   137  	if err != nil {
   138  		// NOTE(rsc): Maybe the group isn't defined. That's fine.
   139  		// On my OS X laptop, rsc logs in with group 5000 even
   140  		// though there's no name for group 5000. Such is Unix.
   141  		t.Logf("LookupGroupId(%q): %v", user.Gid, err)
   142  		return
   143  	}
   144  	if g1.Gid != user.Gid {
   145  		t.Errorf("LookupGroupId(%q).Gid = %s; want %s", user.Gid, g1.Gid, user.Gid)
   146  	}
   147  
   148  	g2, err := LookupGroup(g1.Name)
   149  	if err != nil {
   150  		t.Fatalf("LookupGroup(%q): %v", g1.Name, err)
   151  	}
   152  	if g1.Gid != g2.Gid || g1.Name != g2.Name {
   153  		t.Errorf("LookupGroup(%q) = %+v; want %+v", g1.Name, g2, g1)
   154  	}
   155  }
   156  
   157  func checkGroupList(t *testing.T) {
   158  	t.Helper()
   159  	if !groupListImplemented {
   160  		t.Skip("user: group list not implemented; skipping test")
   161  	}
   162  }
   163  
   164  func TestGroupIds(t *testing.T) {
   165  	checkGroupList(t)
   166  
   167  	user, err := Current()
   168  	if err != nil {
   169  		if hasCgo || (hasUSER && hasHOME) {
   170  			t.Fatalf("Current: %v", err)
   171  		} else {
   172  			t.Skipf("skipping: %v", err)
   173  		}
   174  	}
   175  
   176  	gids, err := user.GroupIds()
   177  	if err != nil {
   178  		t.Fatalf("%+v.GroupIds(): %v", user, err)
   179  	}
   180  	if !containsID(gids, user.Gid) {
   181  		t.Errorf("%+v.GroupIds() = %v; does not contain user GID %s", user, gids, user.Gid)
   182  	}
   183  }
   184  
   185  func containsID(ids []string, id string) bool {
   186  	for _, x := range ids {
   187  		if x == id {
   188  			return true
   189  		}
   190  	}
   191  	return false
   192  }
   193
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