github.com/m3db/m3@v1.5.1-0.20231129193456-75a402aa583b/src/dbnode/x/xio/reader64_test.go (about)

     1  // Copyright (c) 2020 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package xio
    22  
    23  import (
    24  	"encoding/binary"
    25  	"io"
    26  	"testing"
    27  
    28  	"github.com/stretchr/testify/assert"
    29  	"github.com/stretchr/testify/require"
    30  )
    31  
    32  func TestBytesReader64(t *testing.T) {
    33  	var (
    34  		data = []byte{4, 5, 6, 7, 8, 9, 1, 2, 3, 0, 10, 11, 12, 13, 14, 15, 16, 17}
    35  		r    = NewBytesReader64(nil)
    36  	)
    37  
    38  	for l := 0; l < len(data); l++ {
    39  		testBytesReader64(t, r, data[:l])
    40  	}
    41  }
    42  
    43  func testBytesReader64(t *testing.T, r *BytesReader64, data []byte) {
    44  	t.Helper()
    45  	r.Reset(data)
    46  
    47  	var (
    48  		peeked = []byte{}
    49  		read   = []byte{}
    50  		buf    [8]byte
    51  		word   uint64
    52  		n      byte
    53  		err    error
    54  	)
    55  
    56  	for {
    57  		word, n, err = r.Peek64()
    58  		if err != nil {
    59  			break
    60  		}
    61  		binary.BigEndian.PutUint64(buf[:], word)
    62  		peeked = append(peeked, buf[:n]...)
    63  
    64  		word, n, err = r.Read64()
    65  		if err != nil {
    66  			break
    67  		}
    68  		binary.BigEndian.PutUint64(buf[:], word)
    69  		read = append(read, buf[:n]...)
    70  	}
    71  
    72  	require.Equal(t, io.EOF, err)
    73  	assert.Equal(t, data, peeked)
    74  	assert.Equal(t, data, read)
    75  }