github.com/datastax/go-cassandra-native-protocol@v0.0.0-20220706104457-5e8aad05cf90/primitive/bytes_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  	"io/ioutil"
    22  	"testing"
    23  
    24  	"github.com/stretchr/testify/assert"
    25  )
    26  
    27  func TestReadBytes(t *testing.T) {
    28  	tests := []struct {
    29  		name      string
    30  		source    []byte
    31  		expected  []byte
    32  		remaining []byte
    33  		err       error
    34  	}{
    35  		{"empty bytes", []byte{0, 0, 0, 0}, []byte{}, []byte{}, nil},
    36  		{"nil bytes", []byte{0xff, 0xff, 0xff, 0xff}, nil, []byte{}, nil},
    37  		{"singleton bytes", []byte{0, 0, 0, 1, 1}, []byte{1}, []byte{}, nil},
    38  		{"simple bytes", []byte{0, 0, 0, 2, 1, 2}, []byte{1, 2}, []byte{}, nil},
    39  		{
    40  			"cannot read bytes length",
    41  			[]byte{0, 0, 0},
    42  			nil,
    43  			[]byte{},
    44  			fmt.Errorf("cannot read [bytes] length: %w", fmt.Errorf("cannot read [int]: %w", errors.New("unexpected EOF"))),
    45  		},
    46  		{
    47  			"cannot read bytes content",
    48  			[]byte{0, 0, 0, 2, 1},
    49  			nil,
    50  			[]byte{},
    51  			fmt.Errorf("cannot read [bytes] content: %w", errors.New("unexpected EOF")),
    52  		},
    53  	}
    54  	for _, tt := range tests {
    55  		t.Run(tt.name, func(t *testing.T) {
    56  			buf := bytes.NewReader(tt.source)
    57  			actual, err := ReadBytes(buf)
    58  			assert.Equal(t, tt.err, err)
    59  			assert.Equal(t, tt.expected, actual)
    60  
    61  			remaining, _ := ioutil.ReadAll(buf)
    62  			assert.Equal(t, tt.remaining, remaining)
    63  		})
    64  	}
    65  }
    66  
    67  func TestWriteBytes(t *testing.T) {
    68  	tests := []struct {
    69  		name     string
    70  		input    []byte
    71  		expected []byte
    72  		err      error
    73  	}{
    74  		{
    75  			"empty bytes",
    76  			[]byte{},
    77  			[]byte{0, 0, 0, 0},
    78  			nil,
    79  		},
    80  		{
    81  			"nil bytes",
    82  			nil,
    83  			[]byte{0xff, 0xff, 0xff, 0xff},
    84  			nil,
    85  		},
    86  		{
    87  			"singleton bytes",
    88  			[]byte{1},
    89  			[]byte{0, 0, 0, 1, 1},
    90  			nil,
    91  		},
    92  		{
    93  			"simple bytes",
    94  			[]byte{1, 2},
    95  			[]byte{0, 0, 0, 2, 1, 2},
    96  			nil,
    97  		},
    98  	}
    99  	for _, tt := range tests {
   100  		t.Run(tt.name, func(t *testing.T) {
   101  			buf := &bytes.Buffer{}
   102  			err := WriteBytes(tt.input, buf)
   103  			assert.Equal(t, tt.expected, buf.Bytes())
   104  			assert.Equal(t, tt.err, err)
   105  		})
   106  	}
   107  }