github.com/zuoyebang/bitalosdb@v1.1.1-0.20240516111551-79a8c4d8ce20/internal/arenaskl/arena_test.go (about)

     1  // Copyright 2021 The Bitalosdb author(hustxrb@163.com) and other contributors.
     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 arenaskl
    16  
    17  import (
    18  	"math"
    19  	"testing"
    20  
    21  	"github.com/stretchr/testify/require"
    22  )
    23  
    24  func newArena(n uint32) *Arena {
    25  	return NewArena(make([]byte, n))
    26  }
    27  
    28  func TestArenaSizeOverflow(t *testing.T) {
    29  	a := newArena(math.MaxUint32)
    30  
    31  	offset, _, err := a.alloc(math.MaxUint16, 0, 0)
    32  	require.Nil(t, err)
    33  	require.Equal(t, uint32(1), offset)
    34  	require.Equal(t, uint32(math.MaxUint16)+1, a.Size())
    35  
    36  	_, _, err = a.alloc(math.MaxUint32, 0, 0)
    37  	require.Equal(t, ErrArenaFull, err)
    38  	require.Equal(t, uint32(math.MaxUint32), a.Size())
    39  
    40  	_, _, err = a.alloc(math.MaxUint16, 0, 0)
    41  	require.Equal(t, ErrArenaFull, err)
    42  	require.Equal(t, uint32(math.MaxUint32), a.Size())
    43  }