sigs.k8s.io/cluster-api@v1.7.1/internal/topology/names/names_test.go (about)

     1  /*
     2  Copyright 2023 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 names
    18  
    19  import (
    20  	"fmt"
    21  	"testing"
    22  
    23  	. "github.com/onsi/gomega"
    24  	"github.com/onsi/gomega/types"
    25  )
    26  
    27  func Test_templateGenerator_GenerateName(t *testing.T) {
    28  	tests := []struct {
    29  		name     string
    30  		template string
    31  		data     map[string]interface{}
    32  		want     []types.GomegaMatcher
    33  		wantErr  bool
    34  	}{
    35  		{
    36  			name:     "simple template",
    37  			template: "some-simple-{{ .test }}",
    38  			data: map[string]interface{}{
    39  				"test": "testdata",
    40  			},
    41  			want: []types.GomegaMatcher{
    42  				Equal("some-simple-testdata"),
    43  			},
    44  		},
    45  		{
    46  			name:     "name which gets trimmed and added a random suffix with 5 characters",
    47  			template: fmt.Sprintf("%064d", 0),
    48  			want: []types.GomegaMatcher{
    49  				HavePrefix(fmt.Sprintf("%058d", 0)),
    50  				Not(HaveSuffix("00000")),
    51  			},
    52  		},
    53  		{
    54  			name:     "name which does not get trimmed",
    55  			template: fmt.Sprintf("%063d", 0),
    56  			want: []types.GomegaMatcher{
    57  				Equal(fmt.Sprintf("%063d", 0)),
    58  			},
    59  		},
    60  		{
    61  			name:     "error on parsing template",
    62  			template: "some-hardcoded-name-{{ .doesnotexistindata",
    63  			wantErr:  true,
    64  		},
    65  		{
    66  			name:     "error on due to missing key in data",
    67  			template: "some-hardcoded-name-{{ .doesnotexistindata }}",
    68  			data:     nil,
    69  			wantErr:  true,
    70  		},
    71  	}
    72  	for _, tt := range tests {
    73  		t.Run(tt.name, func(t *testing.T) {
    74  			g := NewWithT(t)
    75  			generator := &templateGenerator{
    76  				template: tt.template,
    77  				data:     tt.data,
    78  			}
    79  			got, err := generator.GenerateName()
    80  			if (err != nil) != tt.wantErr {
    81  				t.Errorf("templateGenerator.GenerateName() error = %v, wantErr %v", err, tt.wantErr)
    82  				return
    83  			}
    84  			if len(got) > maxNameLength {
    85  				t.Errorf("generated name should never be longer than %d, got %d", maxNameLength, len(got))
    86  			}
    87  			for _, matcher := range tt.want {
    88  				g.Expect(got).To(matcher)
    89  			}
    90  		})
    91  	}
    92  }