2 files changed, 68 insertions, 0 deletions

diff --git a/tests/ChunkData/CMakeLists.txt b/tests/ChunkData/CMakeLists.txt
index fd508cc6e..381e11cc2 100644
--- a/tests/ChunkData/CMakeLists.txt
+++ b/tests/ChunkData/CMakeLists.txt
@@ -24,3 +24,6 @@ add_executable(arraystocoords-exe ArraytoCoord.cpp)
 target_link_libraries(arraystocoords-exe ChunkBuffer)
 add_test(NAME arraystocoords-test COMMAND arraystocoords-exe)
 
+add_executable(copyblocks-exe CopyBlocks.cpp)
+target_link_libraries(copyblocks-exe ChunkBuffer)
+add_test(NAME copyblocks-test COMMAND copyblocks-exe)
diff --git a/tests/ChunkData/CopyBlocks.cpp b/tests/ChunkData/CopyBlocks.cpp
new file mode 100644
index 000000000..d132411db
--- /dev/null
+++ b/tests/ChunkData/CopyBlocks.cpp
@@ -0,0 +1,65 @@
+
+// CopyBlocks.cpp
+
+// Implements the test for cChunkData::CopyBlockTypes() range copying
+
+
+
+
+
+#include "Globals.h"
+#include "ChunkData.h"
+
+
+
+
+
+int main(int argc, char ** argv)
+{
+	// Set up a cChunkData with known contents - all blocks 0x01, all metas 0x02:
+	cChunkData Data;
+	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));
+	for (size_t idx = 0; idx < 5000; idx++)
+	{
+		for (size_t len = 1; len < 1000; len += 15)
+		{
+			printf("Testing copying %u blocks from index %u\n", (unsigned)len, (unsigned)idx);
+
+			Data.CopyBlockTypes(WritePosition, idx, len);
+
+			// Verify the data copied:
+			for (size_t i = 0; i < len; i++)
+			{
+				assert_test(WritePosition[i] == 0x01);
+			}
+			// Verify the space before the copied data hasn't been changed:
+			for (size_t i = 0; i < WritePosIdx + idx; i++)
+			{
+				assert_test(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++)
+			{
+				assert_test(TestBuffer[i] == 0x03);
+			}
+		}
+	}  // for idx
+	return 0;
+}
+
+
+
+
+