public void BasicTest()
{
Assert.Throws<InvalidOperationException>(() => new BlockGroup(new Address(0), BlockGroup.ReservedBlocks));
var group = new BlockGroup(new Address(4096), 1000);
Assert.IsNotNull(group.Descriptor);
Assert.AreEqual(4096, group.Descriptor.BitmapsAddress.Value);
Assert.AreEqual(1000 - BlockGroup.ReservedBlocks, group.Descriptor.NumFreeBlocksInGroup);
Assert.AreEqual(Constants.NodesPerGroup, group.Descriptor.NumFreeNodesInGroup);
var node1 = group.AllocateNewNode();
var node2 = group.AllocateNewNode();
Assert.AreEqual(Constants.NodesPerGroup - 2, group.Descriptor.NumFreeNodesInGroup);
group.FreeNode(node1);
group.FreeNode(node2);
Assert.AreEqual(Constants.NodesPerGroup, group.Descriptor.NumFreeNodesInGroup);
var block1 = group.AllocateNewBlock();
var block2 = group.AllocateNewBlock();
Assert.AreEqual(1000 - BlockGroup.ReservedBlocks - 2, group.Descriptor.NumFreeBlocksInGroup);
group.FreeBlock(block1);
group.FreeBlock(block2);
Assert.AreEqual(1000 - BlockGroup.ReservedBlocks, group.Descriptor.NumFreeBlocksInGroup);
while (group.AllocateNewBlock() != null)
{
}
while (group.AllocateNewNode() != null)
{
}
Assert.IsNull(group.AllocateNewBlock());
Assert.IsNull(group.AllocateNewNode());
}