github.com/dolthub/go-mysql-server@v0.18.0/sql/memory_test.go (about)

     1  // Copyright 2020-2021 Dolthub, Inc.
     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 sql
    16  
    17  import (
    18  	"testing"
    19  
    20  	"github.com/stretchr/testify/require"
    21  )
    22  
    23  func TestManager(t *testing.T) {
    24  	require := require.New(t)
    25  	m := NewMemoryManager(nil)
    26  
    27  	kv, dispose := m.NewLRUCache(5)
    28  	_, ok := kv.(*lruCache)
    29  	require.True(ok)
    30  	require.Len(m.caches, 1)
    31  	dispose()
    32  	require.Len(m.caches, 0)
    33  
    34  	kv, dispose = m.NewHistoryCache()
    35  	_, ok = kv.(*historyCache)
    36  	require.True(ok)
    37  	require.Len(m.caches, 1)
    38  	dispose()
    39  	require.Len(m.caches, 0)
    40  
    41  	rc, dispose := m.NewRowsCache()
    42  	_, ok = rc.(*rowsCache)
    43  	require.True(ok)
    44  	require.Len(m.caches, 1)
    45  	dispose()
    46  	require.Len(m.caches, 0)
    47  
    48  	m.addCache(disposableCache{})
    49  	f := new(freeableCache)
    50  	m.addCache(f)
    51  	m.Free()
    52  	require.True(f.freed)
    53  }
    54  
    55  type disposableCache struct{}
    56  
    57  func (d disposableCache) Dispose() {}
    58  
    59  type freeableCache struct {
    60  	disposableCache
    61  	freed bool
    62  }
    63  
    64  func (f *freeableCache) Free() { f.freed = true }
    65  
    66  func TestHasAvailable(t *testing.T) {
    67  	require.True(t, HasAvailableMemory(fixedReporter(2, 5)))
    68  	require.False(t, HasAvailableMemory(fixedReporter(6, 5)))
    69  }
    70  
    71  type mockReporter struct {
    72  	f   func() uint64
    73  	max uint64
    74  }
    75  
    76  func (m mockReporter) UsedMemory() uint64 { return m.f() }
    77  func (m mockReporter) MaxMemory() uint64  { return m.max }
    78  
    79  func fixedReporter(v, max uint64) mockReporter {
    80  	return mockReporter{func() uint64 {
    81  		return v
    82  	}, max}
    83  }
    84  
    85  type mockMemory struct {
    86  	f func()
    87  }
    88  
    89  func (m mockMemory) Free() {
    90  	if m.f != nil {
    91  		m.f()
    92  	}
    93  }