github.com/datastax/go-cassandra-native-protocol@v0.0.0-20220706104457-5e8aad05cf90/primitive/inet_test.go (about)

     1  // Copyright 2020 DataStax
     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 primitive
    16  
    17  import (
    18  	"bytes"
    19  	"errors"
    20  	"fmt"
    21  	"net"
    22  	"testing"
    23  
    24  	"github.com/stretchr/testify/assert"
    25  )
    26  
    27  var inet4 = Inet{
    28  	Addr: inetAddr4,
    29  	Port: 9042,
    30  }
    31  
    32  var inet4Bytes = append(inetAddr4Bytes,
    33  	0, 0, 0x23, 0x52, //port
    34  )
    35  
    36  var inet6 = Inet{
    37  	Addr: inetAddr6,
    38  	Port: 9042,
    39  }
    40  
    41  var inet6Bytes = append(inetAddr6Bytes,
    42  	0, 0, 0x23, 0x52, //port
    43  )
    44  
    45  func TestReadInet(t *testing.T) {
    46  	tests := []struct {
    47  		name      string
    48  		source    []byte
    49  		expected  *Inet
    50  		remaining []byte
    51  		err       error
    52  	}{
    53  		{"IPv4 INET", inet4Bytes[:], &inet4, []byte{}, nil},
    54  		{"IPv6 INET", inet6Bytes[:], &inet6, []byte{}, nil},
    55  		{"INET with remaining", append(inet4Bytes[:], 1, 2, 3, 4), &inet4, []byte{1, 2, 3, 4}, nil},
    56  		{
    57  			"cannot read INET length",
    58  			[]byte{},
    59  			nil,
    60  			[]byte{},
    61  			fmt.Errorf("cannot read [inet] address: %w", fmt.Errorf("cannot read [inetaddr] length: %w", fmt.Errorf("cannot read [byte]: %w", errors.New("EOF")))),
    62  		},
    63  		{
    64  			"not enough bytes to read [inet] IPv4 content",
    65  			[]byte{4, 192, 168, 1},
    66  			nil,
    67  			[]byte{},
    68  			fmt.Errorf("cannot read [inet] address: %w", fmt.Errorf("cannot read [inetaddr] IPv4 content: %w", errors.New("unexpected EOF"))),
    69  		},
    70  		{
    71  			"not enough bytes to read [inet] IPv6 content",
    72  			[]byte{16, 0x20, 0x01, 0x0d, 0xb8, 0x85, 0xa3, 0x00, 0x00, 0x00, 0x00, 0x8a, 0x2e, 0x03, 0x70, 0x73},
    73  			nil,
    74  			[]byte{},
    75  			fmt.Errorf("cannot read [inet] address: %w", fmt.Errorf("cannot read [inetaddr] IPv6 content: %w", errors.New("unexpected EOF"))),
    76  		},
    77  		{
    78  			"cannot read [inet] port number",
    79  			[]byte{4, 192, 168, 1, 1, 0, 0, 0},
    80  			nil,
    81  			[]byte{},
    82  			fmt.Errorf("cannot read [inet] port number: %w", fmt.Errorf("cannot read [int]: %w", errors.New("unexpected EOF"))),
    83  		},
    84  	}
    85  	for _, tt := range tests {
    86  		t.Run(tt.name, func(t *testing.T) {
    87  			buf := bytes.NewBuffer(tt.source)
    88  			actual, err := ReadInet(buf)
    89  			assert.Equal(t, tt.expected, actual)
    90  			assert.Equal(t, tt.remaining, buf.Bytes())
    91  			assert.Equal(t, tt.err, err)
    92  		})
    93  	}
    94  }
    95  
    96  func TestWriteInet(t *testing.T) {
    97  	tests := []struct {
    98  		name     string
    99  		input    *Inet
   100  		expected []byte
   101  		err      error
   102  	}{
   103  		{
   104  			"IPv4 INET",
   105  			&inet4,
   106  			inet4Bytes,
   107  			nil,
   108  		},
   109  		{
   110  			"IPv6 INET",
   111  			&inet6,
   112  			inet6Bytes,
   113  			nil,
   114  		},
   115  		{
   116  			"INET with remaining",
   117  			&inet4,
   118  			inet4Bytes,
   119  			nil,
   120  		},
   121  		{
   122  			"cannot write nil INET",
   123  			nil,
   124  			nil,
   125  			errors.New("cannot write nil [inet]"),
   126  		},
   127  	}
   128  	for _, tt := range tests {
   129  		t.Run(tt.name, func(t *testing.T) {
   130  			buf := &bytes.Buffer{}
   131  			err := WriteInet(tt.input, buf)
   132  			assert.Equal(t, tt.expected, buf.Bytes())
   133  			assert.Equal(t, tt.err, err)
   134  		})
   135  	}
   136  }
   137  
   138  func TestLengthOfInet(t *testing.T) {
   139  	tests := []struct {
   140  		name     string
   141  		input    *Inet
   142  		expected int
   143  		err      error
   144  	}{
   145  		{
   146  			"IPv4 INET",
   147  			&inet4,
   148  			LengthOfByte + net.IPv4len + LengthOfInt,
   149  			nil,
   150  		},
   151  		{
   152  			"IPv6 INET",
   153  			&inet6,
   154  			LengthOfByte + net.IPv6len + LengthOfInt,
   155  			nil,
   156  		},
   157  		{
   158  			"nil INET",
   159  			nil,
   160  			-1,
   161  			errors.New("cannot compute nil [inet] length"),
   162  		},
   163  		{
   164  			"nil INET addr",
   165  			&Inet{},
   166  			-1,
   167  			errors.New("cannot compute nil [inetaddr] length"),
   168  		},
   169  	}
   170  	for _, tt := range tests {
   171  		t.Run(tt.name, func(t *testing.T) {
   172  			actual, err := LengthOfInet(tt.input)
   173  			assert.Equal(t, tt.expected, actual)
   174  			assert.Equal(t, tt.err, err)
   175  		})
   176  	}
   177  }