k8s.io/kubernetes@v1.31.0-alpha.0.0.20240520171757-56147500dadc/pkg/kubelet/util/util_test.go (about)

     1  /*
     2  Copyright 2020 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 util
    18  
    19  import (
    20  	"testing"
    21  
    22  	"github.com/stretchr/testify/assert"
    23  )
    24  
    25  func TestGetNodenameForKernel(t *testing.T) {
    26  	testcases := []struct {
    27  		description       string
    28  		hostname          string
    29  		hostDomain        string
    30  		setHostnameAsFQDN bool
    31  		expectedHostname  string
    32  		expectError       bool
    33  	}{{
    34  		description:       "no hostDomain, setHostnameAsFQDN false",
    35  		hostname:          "test.pod.hostname",
    36  		hostDomain:        "",
    37  		setHostnameAsFQDN: false,
    38  		expectedHostname:  "test.pod.hostname",
    39  		expectError:       false,
    40  	}, {
    41  		description:       "no hostDomain, setHostnameAsFQDN true",
    42  		hostname:          "test.pod.hostname",
    43  		hostDomain:        "",
    44  		setHostnameAsFQDN: true,
    45  		expectedHostname:  "test.pod.hostname",
    46  		expectError:       false,
    47  	}, {
    48  		description:       "valid hostDomain, setHostnameAsFQDN false",
    49  		hostname:          "test.pod.hostname",
    50  		hostDomain:        "svc.subdomain.local",
    51  		setHostnameAsFQDN: false,
    52  		expectedHostname:  "test.pod.hostname",
    53  		expectError:       false,
    54  	}, {
    55  		description:       "valid hostDomain, setHostnameAsFQDN true",
    56  		hostname:          "test.pod.hostname",
    57  		hostDomain:        "svc.subdomain.local",
    58  		setHostnameAsFQDN: true,
    59  		expectedHostname:  "test.pod.hostname.svc.subdomain.local",
    60  		expectError:       false,
    61  	}, {
    62  		description:       "FQDN is too long, setHostnameAsFQDN false",
    63  		hostname:          "1234567.1234567",                                         //8*2-1=15 chars
    64  		hostDomain:        "1234567.1234567.1234567.1234567.1234567.1234567.1234567", //8*7-1=55 chars
    65  		setHostnameAsFQDN: false,                                                     //FQDN=15 + 1(dot) + 55 = 71 chars
    66  		expectedHostname:  "1234567.1234567",
    67  		expectError:       false,
    68  	}, {
    69  		description:       "FQDN is too long, setHostnameAsFQDN true",
    70  		hostname:          "1234567.1234567",                                         //8*2-1=15 chars
    71  		hostDomain:        "1234567.1234567.1234567.1234567.1234567.1234567.1234567", //8*7-1=55 chars
    72  		setHostnameAsFQDN: true,                                                      //FQDN=15 + 1(dot) + 55 = 71 chars
    73  		expectedHostname:  "",
    74  		expectError:       true,
    75  	}}
    76  
    77  	for _, tc := range testcases {
    78  		t.Logf("TestCase: %q", tc.description)
    79  		outputHostname, err := GetNodenameForKernel(tc.hostname, tc.hostDomain, &tc.setHostnameAsFQDN)
    80  		if tc.expectError {
    81  			assert.Error(t, err)
    82  		} else {
    83  			assert.NoError(t, err)
    84  		}
    85  		assert.Equal(t, tc.expectedHostname, outputHostname)
    86  	}
    87  
    88  }