github.com/datastax/go-cassandra-native-protocol@v0.0.0-20220706104457-5e8aad05cf90/primitive/streamid_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  	"fmt"
    20  	"math"
    21  	"testing"
    22  
    23  	"github.com/stretchr/testify/assert"
    24  )
    25  
    26  func TestReadStreamId(t *testing.T) {
    27  	for _, version := range SupportedProtocolVersionsLesserThanOrEqualTo(ProtocolVersion2) {
    28  		t.Run(version.String(), func(t *testing.T) {
    29  			tests := []struct {
    30  				name     string
    31  				source   []byte
    32  				expected int16
    33  				err      error
    34  			}{
    35  				{
    36  					"zero stream id",
    37  					[]byte{0},
    38  					int16(0),
    39  					nil,
    40  				},
    41  				{
    42  					"positive stream id",
    43  					[]byte{0x7f},
    44  					int16(127),
    45  					nil,
    46  				},
    47  				{
    48  					"negative stream id",
    49  					[]byte{0x80},
    50  					int16(-128),
    51  					nil,
    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 := ReadStreamId(buf, version)
    58  					assert.Equal(t, tt.expected, actual)
    59  					assert.Equal(t, tt.err, err)
    60  				})
    61  			}
    62  		})
    63  	}
    64  	for _, version := range SupportedProtocolVersionsGreaterThanOrEqualTo(ProtocolVersion3) {
    65  		t.Run(version.String(), func(t *testing.T) {
    66  			tests := []struct {
    67  				name     string
    68  				source   []byte
    69  				expected int16
    70  				err      error
    71  			}{
    72  				{
    73  					"zero stream id",
    74  					[]byte{0, 0},
    75  					int16(0),
    76  					nil,
    77  				},
    78  				{
    79  					"positive stream id",
    80  					[]byte{0x7f, 0xff}, // MaxInt16 = 32767
    81  					math.MaxInt16,
    82  					nil,
    83  				},
    84  				{
    85  					"negative stream id",
    86  					[]byte{0x80, 0x00}, // MinInt16 = -32768
    87  					math.MinInt16,
    88  					nil,
    89  				},
    90  			}
    91  			for _, tt := range tests {
    92  				t.Run(tt.name, func(t *testing.T) {
    93  					buf := bytes.NewReader(tt.source)
    94  					actual, err := ReadStreamId(buf, version)
    95  					assert.Equal(t, tt.expected, actual)
    96  					assert.Equal(t, tt.err, err)
    97  				})
    98  			}
    99  		})
   100  	}
   101  }
   102  
   103  func TestWriteStreamId(t *testing.T) {
   104  	for _, version := range SupportedProtocolVersionsLesserThanOrEqualTo(ProtocolVersion2) {
   105  		t.Run(version.String(), func(t *testing.T) {
   106  			tests := []struct {
   107  				name     string
   108  				input    int16
   109  				expected []byte
   110  				err      error
   111  			}{
   112  				{
   113  					"zero stream id",
   114  					int16(0),
   115  					[]byte{0},
   116  					nil,
   117  				},
   118  				{
   119  					"positive stream id",
   120  					int16(127),
   121  					[]byte{0x7f},
   122  					nil,
   123  				},
   124  				{
   125  					"negative stream id",
   126  					int16(-128),
   127  					[]byte{0x80},
   128  					nil,
   129  				},
   130  				{
   131  					"stream id out of range 1",
   132  					int16(128),
   133  					nil,
   134  					fmt.Errorf("stream id out of range for %v: 128", version),
   135  				},
   136  				{
   137  					"stream id out of range 2",
   138  					int16(-129),
   139  					nil,
   140  					fmt.Errorf("stream id out of range for %v: -129", version),
   141  				},
   142  			}
   143  			for _, tt := range tests {
   144  				t.Run(tt.name, func(t *testing.T) {
   145  					buf := &bytes.Buffer{}
   146  					err := WriteStreamId(tt.input, buf, version)
   147  					assert.Equal(t, tt.expected, buf.Bytes())
   148  					assert.Equal(t, tt.err, err)
   149  				})
   150  			}
   151  		})
   152  	}
   153  	for _, version := range SupportedProtocolVersionsGreaterThanOrEqualTo(ProtocolVersion3) {
   154  		t.Run(version.String(), func(t *testing.T) {
   155  			tests := []struct {
   156  				name     string
   157  				input    int16
   158  				expected []byte
   159  				err      error
   160  			}{
   161  				{
   162  					"zero stream id",
   163  					int16(0),
   164  					[]byte{0, 0},
   165  					nil,
   166  				},
   167  				{
   168  					"positive stream id",
   169  					math.MaxInt16,
   170  					[]byte{0x7f, 0xff}, // MaxInt16 = 32767
   171  					nil,
   172  				},
   173  				{
   174  					"negative stream id",
   175  					math.MinInt16,
   176  					[]byte{0x80, 0x00}, // MinInt16 = -32768
   177  					nil,
   178  				},
   179  			}
   180  			for _, tt := range tests {
   181  				t.Run(tt.name, func(t *testing.T) {
   182  					buf := &bytes.Buffer{}
   183  					err := WriteStreamId(tt.input, buf, version)
   184  					assert.Equal(t, tt.expected, buf.Bytes())
   185  					assert.Equal(t, tt.err, err)
   186  				})
   187  			}
   188  		})
   189  	}
   190  }