github.com/mirantis/virtlet@v1.5.2-0.20191204181327-1659b8a48e9b/pkg/tools/virsh_test.go (about)

     1  /*
     2  Copyright 2018 Mirantis
     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 tools
    18  
    19  import (
    20  	"bytes"
    21  	"strings"
    22  	"testing"
    23  )
    24  
    25  func TestVirshCommand(t *testing.T) {
    26  	for _, tc := range []struct {
    27  		args             string
    28  		expectedCommands map[string]string
    29  		expectedOutput   string
    30  		errSubstring     string
    31  	}{
    32  		{
    33  			args: "list --node=kube-node-1",
    34  			expectedCommands: map[string]string{
    35  				"virtlet-foo42/libvirt/kube-system: virsh list": "foobar",
    36  			},
    37  			expectedOutput: "foobar",
    38  		},
    39  		{
    40  			args: "list",
    41  			expectedCommands: map[string]string{
    42  				"virtlet-foo42/libvirt/kube-system: virsh list": "foobar",
    43  				"virtlet-bar42/libvirt/kube-system: virsh list": "baz",
    44  			},
    45  			expectedOutput: "*** node: kube-node-1 pod: virtlet-foo42 ***\n" +
    46  				"foobar\n" +
    47  				"*** node: kube-node-2 pod: virtlet-bar42 ***\n" +
    48  				"baz\n",
    49  		},
    50  		{
    51  			args: "dumpxml @cirros",
    52  			expectedCommands: map[string]string{
    53  				"virtlet-foo42/libvirt/kube-system: virsh dumpxml virtlet-cc349e91-dcf7-foocontainer": "foobar",
    54  			},
    55  			expectedOutput: "foobar",
    56  		},
    57  		{
    58  			args: "dumpxml @ubuntu",
    59  			expectedCommands: map[string]string{
    60  				"virtlet-bar42/libvirt/kube-system: virsh dumpxml virtlet-4707196f-1d93-vm": "foobar",
    61  			},
    62  			expectedOutput: "foobar",
    63  		},
    64  		{
    65  			args: "dumpxml @cirros --node=kube-node-1",
    66  			expectedCommands: map[string]string{
    67  				"virtlet-foo42/libvirt/kube-system: virsh dumpxml virtlet-cc349e91-dcf7-foocontainer": "foobar",
    68  			},
    69  			expectedOutput: "foobar",
    70  		},
    71  		{
    72  			args:         "dumpxml @cirros --node=kube-node-2",
    73  			errSubstring: "--node specifies a node other than one that runs the VM pod",
    74  		},
    75  		{
    76  			args: "whatever @cirros @cirros1",
    77  			expectedCommands: map[string]string{
    78  				"virtlet-foo42/libvirt/kube-system: virsh whatever virtlet-cc349e91-dcf7-foocontainer virtlet-68e6fede-aab2-qq": "foobar",
    79  			},
    80  			expectedOutput: "foobar",
    81  		},
    82  		{
    83  			args:         "whatever @cirros @ubuntu",
    84  			errSubstring: "can't reference VM pods that run on different nodes",
    85  		},
    86  	} {
    87  		t.Run(tc.args, func(t *testing.T) {
    88  			c := &fakeKubeClient{
    89  				t: t,
    90  				virtletPods: map[string]string{
    91  					"kube-node-1": "virtlet-foo42",
    92  					"kube-node-2": "virtlet-bar42",
    93  				},
    94  				vmPods: map[string]VMPodInfo{
    95  					"cirros": {
    96  						NodeName:       "kube-node-1",
    97  						VirtletPodName: "virtlet-foo42",
    98  						ContainerID:    "cc349e91-dcf7-4f11-a077-36c3673c3fc4",
    99  						ContainerName:  "foocontainer",
   100  					},
   101  					"cirros1": {
   102  						NodeName:       "kube-node-1",
   103  						VirtletPodName: "virtlet-foo42",
   104  						ContainerID:    "68e6fede-aab2-4abe-b339-466386734ddb",
   105  						ContainerName:  "qq",
   106  					},
   107  					"ubuntu": {
   108  						NodeName:       "kube-node-2",
   109  						VirtletPodName: "virtlet-bar42",
   110  						ContainerID:    "4707196f-1d93-46ba-a138-b6201e13db6d",
   111  						ContainerName:  "vm",
   112  					},
   113  				},
   114  				expectedCommands: tc.expectedCommands,
   115  			}
   116  			var out bytes.Buffer
   117  			cmd := NewVirshCmd(c, &out)
   118  			cmd.SetArgs(strings.Split(tc.args, " "))
   119  			cmd.SilenceUsage = true
   120  			cmd.SilenceErrors = true
   121  			switch err := cmd.Execute(); {
   122  			case err != nil && tc.errSubstring == "":
   123  				t.Errorf("virsh command returned an unexpected error: %v", err)
   124  			case err == nil && tc.errSubstring != "":
   125  				t.Errorf("Didn't get expected error (substring %q), output: %q", tc.errSubstring, out.String())
   126  			case err != nil && !strings.Contains(err.Error(), tc.errSubstring):
   127  				t.Errorf("Didn't get expected substring %q in the error: %v", tc.errSubstring, err)
   128  			case err == nil && out.String() != tc.expectedOutput:
   129  				t.Errorf("Unexpected output from the command: %q instead of %q", out.String(), tc.expectedOutput)
   130  			}
   131  			for c := range tc.expectedCommands {
   132  				t.Errorf("command not executed: %q", c)
   133  			}
   134  		})
   135  	}
   136  }