version_test.go

Documentation: k8s.io/kubernetes/pkg/util/kernel

     1  /*
     2  Copyright 2023 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package kernel
    18  
    19  import (
    20  	"errors"
    21  	"testing"
    22  
    23  	"github.com/stretchr/testify/assert"
    24  
    25  	"k8s.io/apimachinery/pkg/util/version"
    26  )
    27  
    28  func TestGetVersion(t *testing.T) {
    29  	testCases := []struct {
    30  		name         string
    31  		readFileFunc readFileFunc
    32  		expected     *version.Version
    33  		err          error
    34  	}{
    35  		{
    36  			name: "valid os-release file",
    37  			readFileFunc: func(_ string) ([]byte, error) {
    38  				return []byte("5.15.0-84-generic"), nil
    39  			},
    40  			expected: version.MajorMinor(5, 15),
    41  		},
    42  		{
    43  			name: "valid os-release file",
    44  			readFileFunc: func(_ string) ([]byte, error) {
    45  				return []byte("5.4.0-128-generic"), nil
    46  			},
    47  			expected: version.MajorMinor(5, 4),
    48  		},
    49  		{
    50  			name: "failed to read os-release file",
    51  			readFileFunc: func(_ string) ([]byte, error) {
    52  				return nil, errors.New("open /proc/sys/kernel/osrelease: failed to read file")
    53  			},
    54  			err:      errors.New("failed to read os-release file: open /proc/sys/kernel/osrelease: failed to read file"),
    55  			expected: nil,
    56  		},
    57  		{
    58  			name: "version not parsable",
    59  			readFileFunc: func(_ string) ([]byte, error) {
    60  				return []byte("5-15-0"), nil
    61  			},
    62  			err:      errors.New("failed to parse kernel version: illegal version string \"5-15-0\""),
    63  			expected: nil,
    64  		},
    65  	}
    66  
    67  	for _, tc := range testCases {
    68  		t.Run(tc.name, func(t *testing.T) {
    69  			kernelVersion, err := getVersion(tc.readFileFunc)
    70  
    71  			if tc.err != nil {
    72  				assert.Equal(t, tc.err.Error(), err.Error())
    73  				assert.Nil(t, kernelVersion)
    74  			} else {
    75  				assert.NoError(t, err)
    76  				assert.Equal(t, tc.expected.Major(), kernelVersion.Major())
    77  				assert.Equal(t, tc.expected.Minor(), kernelVersion.Minor())
    78  				assert.Equal(t, tc.expected.Patch(), kernelVersion.Patch())
    79  			}
    80  		})
    81  	}
    82  }
    83
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