github.com/datastax/go-cassandra-native-protocol@v0.0.0-20220706104457-5e8aad05cf90/primitive/uuid_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  	"testing"
    22  
    23  	"github.com/stretchr/testify/assert"
    24  )
    25  
    26  var uuid = UUID{0xC0, 0xD1, 0xD2, 0x1E, 0xBB, 0x01, 0x41, 0x96, 0x86, 0xDB, 0xBC, 0x31, 0x7B, 0xC1, 0x79, 0x6A}
    27  var uuidBytes = [16]byte{0xC0, 0xD1, 0xD2, 0x1E, 0xBB, 0x01, 0x41, 0x96, 0x86, 0xDB, 0xBC, 0x31, 0x7B, 0xC1, 0x79, 0x6A}
    28  
    29  func TestReadUuid(t *testing.T) {
    30  	tests := []struct {
    31  		name      string
    32  		source    []byte
    33  		expected  *UUID
    34  		remaining []byte
    35  		err       error
    36  	}{
    37  		{"simple UUID", uuidBytes[:], &uuid, []byte{}, nil},
    38  		{"UUID with remaining", append(uuidBytes[:], 1, 2, 3, 4), &uuid, []byte{1, 2, 3, 4}, nil},
    39  		{
    40  			"cannot read UUID",
    41  			uuidBytes[:15],
    42  			nil,
    43  			[]byte{},
    44  			fmt.Errorf("cannot read [uuid] content: %w", errors.New("unexpected EOF")),
    45  		},
    46  	}
    47  	for _, tt := range tests {
    48  		t.Run(tt.name, func(t *testing.T) {
    49  			buf := bytes.NewBuffer(tt.source)
    50  			actual, err := ReadUuid(buf)
    51  			assert.Equal(t, tt.expected, actual)
    52  			assert.Equal(t, tt.remaining, buf.Bytes())
    53  			assert.Equal(t, tt.err, err)
    54  		})
    55  	}
    56  }
    57  
    58  func TestWriteUuid(t *testing.T) {
    59  	tests := []struct {
    60  		name     string
    61  		input    *UUID
    62  		expected []byte
    63  		err      error
    64  	}{
    65  		{
    66  			"simple UUID",
    67  			&uuid,
    68  			uuidBytes[:],
    69  			nil,
    70  		},
    71  		{
    72  			"UUID with remaining",
    73  			&uuid,
    74  			uuidBytes[:],
    75  			nil,
    76  		},
    77  		{
    78  			"nil UUID",
    79  			nil,
    80  			nil,
    81  			errors.New("cannot write nil [uuid]"),
    82  		},
    83  	}
    84  	for _, tt := range tests {
    85  		t.Run(tt.name, func(t *testing.T) {
    86  			buf := &bytes.Buffer{}
    87  			err := WriteUuid(tt.input, buf)
    88  			assert.Equal(t, tt.expected, buf.Bytes())
    89  			assert.Equal(t, tt.err, err)
    90  		})
    91  	}
    92  }
    93  
    94  func TestUUID_DeepCopy(t *testing.T) {
    95  	u := &UUID{0, 1, 2, 3, 4, 5, 6}
    96  	cloned := u.DeepCopy()
    97  
    98  	assert.Equal(t, u, cloned)
    99  
   100  	cloned[1] = 9
   101  	assert.NotEqual(t, u, cloned)
   102  }