istio.io/istio@v0.0.0-20240520182934-d79c90f27776/security/pkg/pki/util/dual_use_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 util
    16  
    17  import (
    18  	"strings"
    19  	"testing"
    20  )
    21  
    22  func TestDualUseCommonName(t *testing.T) {
    23  	tt := []struct {
    24  		name       string
    25  		host       string
    26  		expectedCN string
    27  		expectErr  bool
    28  	}{
    29  		{
    30  			name:       "single host",
    31  			host:       "a.com",
    32  			expectedCN: "a.com",
    33  		},
    34  		{
    35  			name:       "multiple hosts",
    36  			host:       "a.com,b.org,c.groups",
    37  			expectedCN: "a.com",
    38  		},
    39  		{
    40  			name:      "long host",
    41  			host:      strings.Repeat("a", 61) + ".com",
    42  			expectErr: true,
    43  		},
    44  	}
    45  
    46  	for _, tc := range tt {
    47  		cn, err := DualUseCommonName(tc.host)
    48  		if tc.expectErr {
    49  			if err == nil {
    50  				t.Errorf("[%s] passed - expected error", tc.name)
    51  			}
    52  			continue
    53  		}
    54  
    55  		if err != nil {
    56  			t.Errorf("[%s] unexpected error: %v", tc.name, err)
    57  		}
    58  
    59  		if tc.expectedCN != cn {
    60  			t.Errorf("[%s] unexpected CN: wanted %q got %q", tc.name, tc.expectedCN, cn)
    61  		}
    62  	}
    63  }