github.com/google/cloudprober@v0.11.3/cloudprober_test.go (about)

     1  // Copyright 2019-2020 The Cloudprober 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 cloudprober
    16  
    17  import (
    18  	"os"
    19  	"testing"
    20  
    21  	configpb "github.com/google/cloudprober/config/proto"
    22  	"google.golang.org/protobuf/proto"
    23  )
    24  
    25  func TestGetDefaultServerPort(t *testing.T) {
    26  	tests := []struct {
    27  		desc       string
    28  		configPort int32
    29  		envVar     string
    30  		wantPort   int
    31  		wantErr    bool
    32  	}{
    33  		{
    34  			desc:       "use port from config",
    35  			configPort: 9316,
    36  			envVar:     "3141",
    37  			wantPort:   9316,
    38  		},
    39  		{
    40  			desc:       "use default port",
    41  			configPort: 0,
    42  			envVar:     "",
    43  			wantPort:   DefaultServerPort,
    44  		},
    45  		{
    46  			desc:       "use port from env",
    47  			configPort: 0,
    48  			envVar:     "3141",
    49  			wantPort:   3141,
    50  		},
    51  		{
    52  			desc:       "ignore kubernetes port",
    53  			configPort: 0,
    54  			envVar:     "tcp://100.101.102.103:3141",
    55  			wantPort:   9313,
    56  		},
    57  		{
    58  			desc:       "error due to bad env var",
    59  			configPort: 0,
    60  			envVar:     "a3141",
    61  			wantErr:    true,
    62  		},
    63  	}
    64  
    65  	for _, test := range tests {
    66  		t.Run(test.desc, func(t *testing.T) {
    67  			os.Setenv(ServerPortEnvVar, test.envVar)
    68  			port, err := getDefaultServerPort(&configpb.ProberConfig{
    69  				Port: proto.Int32(test.configPort),
    70  			}, nil)
    71  
    72  			if err != nil {
    73  				if !test.wantErr {
    74  					t.Errorf("Got unexpected error: %v", err)
    75  				} else {
    76  					return
    77  				}
    78  			}
    79  
    80  			if port != test.wantPort {
    81  				t.Errorf("got port: %d, want port: %d", port, test.wantPort)
    82  			}
    83  		})
    84  	}
    85  
    86  }