string_slice_flag_test.go

Documentation: k8s.io/component-base/cli/flag

     1  /*
     2  Copyright 2021 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 flag
    18  
    19  import (
    20  	"fmt"
    21  	"reflect"
    22  	"strings"
    23  	"testing"
    24  
    25  	"github.com/spf13/pflag"
    26  )
    27  
    28  func TestStringSlice(t *testing.T) {
    29  	tests := []struct {
    30  		args       []string
    31  		def        []string
    32  		expected   []string
    33  		parseError string
    34  		changed    bool
    35  	}{
    36  		{
    37  			args:     []string{},
    38  			expected: nil,
    39  		},
    40  		{
    41  			args:     []string{"a"},
    42  			expected: []string{"a"},
    43  			changed:  true,
    44  		},
    45  		{
    46  			args:     []string{"a", "b"},
    47  			expected: []string{"a", "b"},
    48  			changed:  true,
    49  		},
    50  		{
    51  			def:      []string{"a"},
    52  			args:     []string{"a", "b"},
    53  			expected: []string{"a", "b"},
    54  			changed:  true,
    55  		},
    56  		{
    57  			def:      []string{"a", "b"},
    58  			args:     []string{"a", "b"},
    59  			expected: []string{"a", "b"},
    60  			changed:  true,
    61  		},
    62  	}
    63  	for i, test := range tests {
    64  		fs := pflag.NewFlagSet("testStringSlice", pflag.ContinueOnError)
    65  		var s []string
    66  		s = append(s, test.def...)
    67  
    68  		v := NewStringSlice(&s)
    69  		fs.Var(v, "slice", "usage")
    70  
    71  		args := []string{}
    72  		for _, a := range test.args {
    73  			args = append(args, fmt.Sprintf("--slice=%s", a))
    74  		}
    75  
    76  		err := fs.Parse(args)
    77  		if test.parseError != "" {
    78  			if err == nil {
    79  				t.Errorf("%d: expected error %q, got nil", i, test.parseError)
    80  			} else if !strings.Contains(err.Error(), test.parseError) {
    81  				t.Errorf("%d: expected error %q, got %q", i, test.parseError, err)
    82  			}
    83  		} else if err != nil {
    84  			t.Errorf("%d: expected nil error, got %v", i, err)
    85  		}
    86  		if !reflect.DeepEqual(s, test.expected) {
    87  			t.Errorf("%d: expected %+v, got %+v", i, test.expected, s)
    88  		}
    89  		if v.changed != test.changed {
    90  			t.Errorf("%d: expected %t got %t", i, test.changed, v.changed)
    91  		}
    92  	}
    93  }
    94
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