cuberite-2a/tests/ChunkData/CopyBlocks.cpp

// CopyBlocks.cpp

// Implements the test for cChunkData::CopyBlockTypes() range copying





#include "Globals.h"
#include "../TestHelpers.h"
#include "ChunkData.h"





/** Performs the entire CopyBlocks test. */
static void test()
{
	// Set up a cChunkData with known contents - all blocks 0x01, all metas 0x02:
	class cMockAllocationPool
		: public cAllocationPool<cChunkData::sChunkSection>
	{
		virtual cChunkData::sChunkSection * Allocate() override
		{
			return new cChunkData::sChunkSection();
		}

		virtual void Free(cChunkData::sChunkSection * a_Ptr) override
		{
			delete a_Ptr;
		}

		virtual bool DoIsEqual(const cAllocationPool<cChunkData::sChunkSection> &) const noexcept override
		{
			return false;
		}
	} Pool;
	cChunkData Data(Pool);
	cChunkDef::BlockTypes   BlockTypes;
	cChunkDef::BlockNibbles BlockMetas;
	memset(BlockTypes, 0x01, sizeof(BlockTypes));
	memset(BlockMetas, 0x02, sizeof(BlockMetas));
	Data.SetBlockTypes(BlockTypes);
	Data.SetMetas(BlockMetas);

	// Try to read varying amounts of blocktypes from the cChunkData.
	// Verify that the exact amount of memory is copied, by copying to a larger buffer and checking its boundaries
	BLOCKTYPE TestBuffer[5 * cChunkDef::NumBlocks];
	size_t WritePosIdx = 2 * cChunkDef::NumBlocks;
	BLOCKTYPE * WritePosition = &TestBuffer[WritePosIdx];
	memset(TestBuffer, 0x03, sizeof(TestBuffer));
	size_t LastReportedStep = 1;
	for (size_t idx = 0; idx < 5000; idx += 73)
	{
		if (idx / 500 != LastReportedStep)
		{
			printf("Testing index %u...\n", static_cast<unsigned>(idx));
			LastReportedStep = idx / 500;
		}

		for (size_t len = 3; len < 700; len += 13)
		{
			Data.CopyBlockTypes(WritePosition, idx, len);

			// Verify the data copied:
			for (size_t i = 0; i < len; i++)
			{
				TEST_EQUAL(WritePosition[i], 0x01);
			}
			// Verify the space before the copied data hasn't been changed:
			for (size_t i = 0; i < WritePosIdx; i++)
			{
				TEST_EQUAL(TestBuffer[i], 0x03);
			}
			// Verify the space after the copied data hasn't been changed:
			for (size_t i = WritePosIdx + idx + len; i < ARRAYCOUNT(TestBuffer); i++)
			{
				TEST_EQUAL(TestBuffer[i], 0x03);
			}

			// Re-initialize the buffer for the next test:
			for (size_t i = 0; i < len; i++)
			{
				WritePosition[i] = 0x03;
			}
		}  // for len
	}  // for idx
}





IMPLEMENT_TEST_MAIN("ChunkData CopyBlocks",
	test()
)