istio.io/istio@v0.0.0-20240520182934-d79c90f27776/istioctl/pkg/ztunnelconfig/ztunnelconfig_test.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package ztunnelconfig
    16  
    17  import (
    18  	"bytes"
    19  	"fmt"
    20  	"net/http"
    21  	"strings"
    22  	"testing"
    23  
    24  	"github.com/spf13/cobra"
    25  	"k8s.io/cli-runtime/pkg/resource"
    26  	"k8s.io/client-go/rest/fake"
    27  	cmdtesting "k8s.io/kubectl/pkg/cmd/testing"
    28  	cmdutil "k8s.io/kubectl/pkg/cmd/util"
    29  
    30  	"istio.io/istio/istioctl/pkg/cli"
    31  	"istio.io/istio/pkg/kube"
    32  )
    33  
    34  type execTestCase struct {
    35  	execClientConfig map[string][]byte
    36  	args             []string
    37  
    38  	// Typically use one of the three
    39  	expectedOutput string // Expected constant output
    40  	expectedString string // String output is expected to contain
    41  
    42  	wantException bool
    43  }
    44  
    45  func TestProxyConfig(t *testing.T) {
    46  	loggingConfig := map[string][]byte{
    47  		"ztunnel-9v7nw": []byte("current log level is debug"),
    48  	}
    49  	cases := []execTestCase{
    50  		{
    51  			args:           []string{},
    52  			expectedString: "A group of commands used to update or retrieve Ztunnel",
    53  		},
    54  		{ // logger name invalid when namespacing is used improperly
    55  			execClientConfig: loggingConfig,
    56  			args:             strings.Split("log ztunnel-9v7nw --level ztunnel:::pool:debug", " "),
    57  			expectedString:   "unrecognized logging level: pool:debug",
    58  			wantException:    true,
    59  		},
    60  		{ // logger name valid and logging level valid
    61  			execClientConfig: loggingConfig,
    62  			args:             strings.Split("log ztunnel-9v7nw --level ztunnel::pool:debug", " "),
    63  			expectedString:   "",
    64  			wantException:    false,
    65  		},
    66  		{ // set ztunnel logging level
    67  			execClientConfig: loggingConfig,
    68  			args:             strings.Split("log ztunnel-9v7nw --level debug", " "),
    69  			expectedString:   "current log level is debug",
    70  			wantException:    false,
    71  		},
    72  	}
    73  
    74  	for i, c := range cases {
    75  		t.Run(fmt.Sprintf("case %d %s", i, strings.Join(c.args, " ")), func(t *testing.T) {
    76  			verifyExecTestOutput(t, ZtunnelConfig(cli.NewFakeContext(&cli.NewFakeContextOption{
    77  				Results:   c.execClientConfig,
    78  				Namespace: "default",
    79  			})), c)
    80  		})
    81  	}
    82  }
    83  
    84  func verifyExecTestOutput(t *testing.T, cmd *cobra.Command, c execTestCase) {
    85  	t.Helper()
    86  
    87  	var out bytes.Buffer
    88  	cmd.SetArgs(c.args)
    89  	cmd.SilenceUsage = true
    90  	cmd.SetOut(&out)
    91  	cmd.SetErr(&out)
    92  
    93  	fErr := cmd.Execute()
    94  	output := out.String()
    95  
    96  	if c.expectedOutput != "" && c.expectedOutput != output {
    97  		t.Fatalf("Unexpected output for 'istioctl %s'\n got: %q\nwant: %q", strings.Join(c.args, " "), output, c.expectedOutput)
    98  	}
    99  
   100  	if c.expectedString != "" && !strings.Contains(output, c.expectedString) {
   101  		t.Fatalf("Output didn't match for '%s %s'\n got %v\nwant: %v", cmd.Name(), strings.Join(c.args, " "), output, c.expectedString)
   102  	}
   103  
   104  	if c.wantException {
   105  		if fErr == nil {
   106  			t.Fatalf("Wanted an exception for 'istioctl %s', didn't get one, output was %q",
   107  				strings.Join(c.args, " "), output)
   108  		}
   109  	} else {
   110  		if fErr != nil {
   111  			t.Fatalf("Unwanted exception for 'istioctl %s': %v", strings.Join(c.args, " "), fErr)
   112  		}
   113  	}
   114  }
   115  
   116  func init() {
   117  	cli.MakeKubeFactory = func(k kube.CLIClient) cmdutil.Factory {
   118  		tf := cmdtesting.NewTestFactory()
   119  		_, _, codec := cmdtesting.NewExternalScheme()
   120  		tf.UnstructuredClient = &fake.RESTClient{
   121  			NegotiatedSerializer: resource.UnstructuredPlusDefaultContentConfig().NegotiatedSerializer,
   122  			Resp: &http.Response{
   123  				StatusCode: http.StatusOK,
   124  				Header:     cmdtesting.DefaultHeader(),
   125  				Body: cmdtesting.ObjBody(codec,
   126  					cmdtesting.NewInternalType("", "", "foo")),
   127  			},
   128  		}
   129  		return tf
   130  	}
   131  }