public void AcquireCache_MultipleEntriesEvicted_OldestAreEvicted()
{
FileSystemBufferManager manager = CreateManager(0x20000);
Buffer buffer1 = manager.AllocateBuffer(0x8000);
Buffer buffer2 = manager.AllocateBuffer(0x8000);
Buffer buffer3 = manager.AllocateBuffer(0x8000);
Buffer buffer4 = manager.AllocateBuffer(0x8000);
long handle1 = manager.RegisterCache(buffer1, new IBufferManager.BufferAttribute());
long handle2 = manager.RegisterCache(buffer2, new IBufferManager.BufferAttribute());
long handle3 = manager.RegisterCache(buffer3, new IBufferManager.BufferAttribute());
long handle4 = manager.RegisterCache(buffer4, new IBufferManager.BufferAttribute());
manager.AllocateBuffer(0x10000);
Buffer buffer1B = manager.AcquireCache(handle1);
Buffer buffer2B = manager.AcquireCache(handle2);
Buffer buffer3B = manager.AcquireCache(handle3);
Buffer buffer4B = manager.AcquireCache(handle4);
Assert.True(buffer1B.IsNull);
Assert.True(buffer2B.IsNull);
Assert.Equal(buffer3, buffer3B);
Assert.Equal(buffer4, buffer4B);
}
public void AcquireCache_EntryEvicted_ReturnsNull()
{
FileSystemBufferManager manager = CreateManager(0x20000);
Buffer buffer1 = manager.AllocateBuffer(0x10000);
long handle = manager.RegisterCache(buffer1, new IBufferManager.BufferAttribute());
manager.AllocateBuffer(0x20000);
Buffer buffer3 = manager.AcquireCache(handle);
Assert.True(buffer3.IsNull);
}