github.com/demonoid81/containerd@v1.3.4/mount/mount_linux_test.go (about)

     1  // +build linux
     2  
     3  /*
     4     Copyright The containerd Authors.
     5  
     6     Licensed under the Apache License, Version 2.0 (the "License");
     7     you may not use this file except in compliance with the License.
     8     You may obtain a copy of the License at
     9  
    10         http://www.apache.org/licenses/LICENSE-2.0
    11  
    12     Unless required by applicable law or agreed to in writing, software
    13     distributed under the License is distributed on an "AS IS" BASIS,
    14     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    15     See the License for the specific language governing permissions and
    16     limitations under the License.
    17  */
    18  
    19  package mount
    20  
    21  import (
    22  	"reflect"
    23  	"testing"
    24  )
    25  
    26  func TestLongestCommonPrefix(t *testing.T) {
    27  	tcases := []struct {
    28  		in       []string
    29  		expected string
    30  	}{
    31  		{[]string{}, ""},
    32  		{[]string{"foo"}, "foo"},
    33  		{[]string{"foo", "bar"}, ""},
    34  		{[]string{"foo", "foo"}, "foo"},
    35  		{[]string{"foo", "foobar"}, "foo"},
    36  		{[]string{"foo", "", "foobar"}, ""},
    37  	}
    38  
    39  	for i, tc := range tcases {
    40  		if got := longestCommonPrefix(tc.in); got != tc.expected {
    41  			t.Fatalf("[%d case] expected (%s), but got (%s)", i+1, tc.expected, got)
    42  		}
    43  	}
    44  }
    45  
    46  func TestCompactLowerdirOption(t *testing.T) {
    47  	tcases := []struct {
    48  		opts      []string
    49  		commondir string
    50  		newopts   []string
    51  	}{
    52  		// no lowerdir or only one
    53  		{
    54  			[]string{"workdir=a"},
    55  			"",
    56  			[]string{"workdir=a"},
    57  		},
    58  		{
    59  			[]string{"workdir=a", "lowerdir=b"},
    60  			"",
    61  			[]string{"workdir=a", "lowerdir=b"},
    62  		},
    63  
    64  		// >= 2 lowerdir
    65  		{
    66  			[]string{"lowerdir=/snapshots/1/fs:/snapshots/10/fs"},
    67  			"/snapshots/",
    68  			[]string{"lowerdir=1/fs:10/fs"},
    69  		},
    70  		{
    71  			[]string{"lowerdir=/snapshots/1/fs:/snapshots/10/fs:/snapshots/2/fs"},
    72  			"/snapshots/",
    73  			[]string{"lowerdir=1/fs:10/fs:2/fs"},
    74  		},
    75  
    76  		// if common dir is /
    77  		{
    78  			[]string{"lowerdir=/snapshots/1/fs:/other_snapshots/1/fs"},
    79  			"",
    80  			[]string{"lowerdir=/snapshots/1/fs:/other_snapshots/1/fs"},
    81  		},
    82  	}
    83  
    84  	for i, tc := range tcases {
    85  		dir, opts := compactLowerdirOption(tc.opts)
    86  		if dir != tc.commondir {
    87  			t.Fatalf("[%d case] expected common dir (%s), but got (%s)", i+1, tc.commondir, dir)
    88  		}
    89  
    90  		if !reflect.DeepEqual(opts, tc.newopts) {
    91  			t.Fatalf("[%d case] expected options (%v), but got (%v)", i+1, tc.newopts, opts)
    92  		}
    93  	}
    94  }