github.com/minio/minio@v0.0.0-20240328213742-3f72439b8a27/internal/http/check_port_test.go (about)

     1  // Copyright (c) 2015-2023 MinIO, Inc.
     2  //
     3  // This file is part of MinIO Object Storage stack
     4  //
     5  // This program is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Affero General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // This program is distributed in the hope that it will be useful
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  // GNU Affero General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Affero General Public License
    16  // along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package http
    19  
    20  import (
    21  	"fmt"
    22  	"net"
    23  	"runtime"
    24  	"strconv"
    25  	"testing"
    26  )
    27  
    28  // Tests for port availability logic written for server startup sequence.
    29  func TestCheckPortAvailability(t *testing.T) {
    30  	if runtime.GOOS != "linux" {
    31  		t.Skip()
    32  	}
    33  
    34  	l, err := net.Listen("tcp", "localhost:0") // ask kernel for a free port.
    35  	if err != nil {
    36  		t.Fatal(err)
    37  	}
    38  	defer l.Close()
    39  
    40  	port := l.Addr().(*net.TCPAddr).Port
    41  
    42  	testCases := []struct {
    43  		host        string
    44  		port        int
    45  		expectedErr error
    46  	}{
    47  		{"", port, fmt.Errorf("listen tcp :%v: bind: address already in use", port)},
    48  		{"127.0.0.1", port, fmt.Errorf("listen tcp 127.0.0.1:%v: bind: address already in use", port)},
    49  	}
    50  
    51  	for _, testCase := range testCases {
    52  		err := CheckPortAvailability(testCase.host, strconv.Itoa(testCase.port), TCPOptions{})
    53  		switch {
    54  		case testCase.expectedErr == nil:
    55  			if err != nil {
    56  				t.Fatalf("error: expected = <nil>, got = %v", err)
    57  			}
    58  		case err == nil:
    59  			t.Fatalf("error: expected = %v, got = <nil>", testCase.expectedErr)
    60  		case testCase.expectedErr.Error() != err.Error():
    61  			t.Fatalf("error: expected = %v, got = %v", testCase.expectedErr, err)
    62  		}
    63  	}
    64  }