github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/core/ip/mock_resolver.go (about)

     1  /*
     2   * Copyright (C) 2017 The "MysteriumNetwork/node" Authors.
     3   *
     4   * This program is free software: you can redistribute it and/or modify
     5   * it under the terms of the GNU General Public License as published by
     6   * the Free Software Foundation, either version 3 of the License, or
     7   * (at your option) any later version.
     8   *
     9   * This program is distributed in the hope that it will be useful,
    10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12   * GNU General Public License for more details.
    13   *
    14   * You should have received a copy of the GNU General Public License
    15   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    16   */
    17  
    18  package ip
    19  
    20  import (
    21  	"net"
    22  )
    23  
    24  // NewResolverMock returns mockResolver which resolves statically entered IP.
    25  // If multiple addresses are provided then return will depend on call order.
    26  func NewResolverMock(ip string) Resolver {
    27  	return &mockResolver{
    28  		publicIP:   ip,
    29  		outboundIP: net.ParseIP(ip),
    30  		error:      nil,
    31  	}
    32  }
    33  
    34  // NewResolverMockMultiple returns mockResolver which resolves statically entered IP.
    35  // If multiple addresses are provided then return will depend on call order.
    36  func NewResolverMockMultiple(outboundIP string, publicIPs ...string) Resolver {
    37  	return &mockResolver{
    38  		publicIPs:  publicIPs,
    39  		outboundIP: net.ParseIP(outboundIP),
    40  		error:      nil,
    41  	}
    42  }
    43  
    44  // NewResolverMockFailing returns mockResolver with entered error
    45  func NewResolverMockFailing(err error) Resolver {
    46  	return &mockResolver{
    47  		error: err,
    48  	}
    49  }
    50  
    51  type mockResolver struct {
    52  	publicIP   string
    53  	publicIPs  []string
    54  	outboundIP net.IP
    55  	error      error
    56  }
    57  
    58  func (client *mockResolver) MockPublicIPs(ips ...string) {
    59  	client.publicIPs = ips
    60  }
    61  
    62  func (client *mockResolver) GetPublicIP() (string, error) {
    63  	if client.publicIPs != nil {
    64  		return client.getNextIP(), client.error
    65  	}
    66  	return client.publicIP, client.error
    67  }
    68  
    69  func (client *mockResolver) GetProxyIP(_ int) (string, error) {
    70  	if client.publicIPs != nil {
    71  		return client.getNextIP(), client.error
    72  	}
    73  	return client.publicIP, client.error
    74  }
    75  
    76  func (client *mockResolver) GetOutboundIP() (string, error) {
    77  	return client.outboundIP.String(), client.error
    78  }
    79  
    80  func (client *mockResolver) getNextIP() string {
    81  	// Return first address if only one provided.
    82  	if len(client.publicIPs) == 1 {
    83  		return client.publicIPs[0]
    84  	}
    85  	// Return first address and dequeue from address list. This allows to
    86  	// mock to return different value for each call.
    87  	if len(client.publicIPs) > 0 {
    88  		ip := client.publicIPs[0]
    89  		client.publicIPs = client.publicIPs[1:]
    90  		return ip
    91  	}
    92  	return ""
    93  }