clusterinfo_dump_test.go

Documentation: k8s.io/kubectl/pkg/cmd/clusterinfo

     1  /*
     2  Copyright 2016 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 clusterinfo
    18  
    19  import (
    20  	"os"
    21  	"path"
    22  	"testing"
    23  
    24  	"k8s.io/cli-runtime/pkg/genericiooptions"
    25  	cmdtesting "k8s.io/kubectl/pkg/cmd/testing"
    26  )
    27  
    28  func TestSetupOutputWriterNoOp(t *testing.T) {
    29  	tests := []struct {
    30  		name         string
    31  		outputWriter string
    32  	}{
    33  		{
    34  			name:         "empty",
    35  			outputWriter: "",
    36  		},
    37  		{
    38  			name:         "stdout",
    39  			outputWriter: "-",
    40  		},
    41  	}
    42  	for _, tt := range tests {
    43  		t.Run(tt.name, func(t *testing.T) {
    44  			_, _, buf, _ := genericiooptions.NewTestIOStreams()
    45  			f := cmdtesting.NewTestFactory()
    46  			defer f.Cleanup()
    47  
    48  			writer := setupOutputWriter(tt.outputWriter, buf, "/some/file/that/should/be/ignored", "")
    49  			if writer != buf {
    50  				t.Errorf("expected: %v, saw: %v", buf, writer)
    51  			}
    52  		})
    53  	}
    54  }
    55  
    56  func TestSetupOutputWriterFile(t *testing.T) {
    57  	file := "output"
    58  	extension := ".json"
    59  	dir, err := os.MkdirTemp(os.TempDir(), "out")
    60  	if err != nil {
    61  		t.Errorf("unexpected error: %v", err)
    62  	}
    63  	fullPath := path.Join(dir, file) + extension
    64  	defer os.RemoveAll(dir)
    65  
    66  	_, _, buf, _ := genericiooptions.NewTestIOStreams()
    67  	f := cmdtesting.NewTestFactory()
    68  	defer f.Cleanup()
    69  
    70  	writer := setupOutputWriter(dir, buf, file, extension)
    71  	if writer == buf {
    72  		t.Errorf("expected: %v, saw: %v", buf, writer)
    73  	}
    74  	output := "some data here"
    75  	writer.Write([]byte(output))
    76  
    77  	data, err := os.ReadFile(fullPath)
    78  	if err != nil {
    79  		t.Errorf("unexpected error: %v", err)
    80  	}
    81  	if string(data) != output {
    82  		t.Errorf("expected: %v, saw: %v", output, data)
    83  	}
    84  }
    85
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