github.com/keybase/client/go@v0.0.0-20241007131713-f10651d043c8/kbfs/kbfsmd/id_test.go (about)

     1  // Copyright 2016 Keybase Inc. All rights reserved.
     2  // Use of this source code is governed by a BSD
     3  // license that can be found in the LICENSE file.
     4  
     5  package kbfsmd
     6  
     7  import (
     8  	"testing"
     9  
    10  	"github.com/keybase/client/go/kbfs/kbfscodec"
    11  	"github.com/keybase/client/go/kbfs/kbfshash"
    12  	"github.com/stretchr/testify/require"
    13  )
    14  
    15  // Make sure ID encodes and decodes properly with minimal overhead.
    16  func TestIDEncodeDecode(t *testing.T) {
    17  	id := FakeID(1)
    18  	codec := kbfscodec.NewMsgpack()
    19  	encodedID, err := codec.Encode(id)
    20  	require.NoError(t, err)
    21  
    22  	// See
    23  	// https://github.com/msgpack/msgpack/blob/master/spec.md#formats-bin
    24  	// for why there are two bytes of overhead.
    25  	const overhead = 2
    26  	require.Equal(t, kbfshash.DefaultHashByteLength+overhead, len(encodedID))
    27  
    28  	var id2 ID
    29  	err = codec.Decode(encodedID, &id2)
    30  	require.NoError(t, err)
    31  
    32  	require.Equal(t, id, id2)
    33  }
    34  
    35  // Make sure the zero ID value encodes and decodes properly.
    36  func TestIDEncodeDecodeZero(t *testing.T) {
    37  	codec := kbfscodec.NewMsgpack()
    38  	encodedID, err := codec.Encode(ID{})
    39  	require.NoError(t, err)
    40  
    41  	require.Equal(t, []byte{0xc0}, encodedID)
    42  
    43  	var id ID
    44  	err = codec.Decode(encodedID, &id)
    45  	require.NoError(t, err)
    46  
    47  	require.Equal(t, ID{}, id)
    48  }