src/test/java/net/querz/nbt/mca/MCAFileTest.java - devel/querz-nbt - Rivoreo Source Code Repositories

 package net.querz.nbt.mca;

 import net.querz.nbt.ByteTag;
 import net.querz.nbt.CompoundTag;
 import net.querz.nbt.ListTag;

 import java.io.DataOutputStream;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.RandomAccessFile;
 import java.nio.file.Files;
 import java.util.Arrays;

 public class MCAFileTest extends MCATestCase {

 	public void testGetChunkIndex() {
 		assertEquals(0, MCAFile.getChunkIndex(0, 0));
 		assertEquals(0, MCAFile.getChunkIndex(32, 32));
 		assertEquals(0, MCAFile.getChunkIndex(-32, -32));
 		assertEquals(0, MCAFile.getChunkIndex(0, 32));
 		assertEquals(0, MCAFile.getChunkIndex(-32, 32));
 		assertEquals(1023, MCAFile.getChunkIndex(31, 31));
 		assertEquals(1023, MCAFile.getChunkIndex(-1, -1));
 		assertEquals(1023, MCAFile.getChunkIndex(63, 63));
 		assertEquals(632, MCAFile.getChunkIndex(24, -13));
 		int i = 0;
 		for (int cz = 0; cz < 32; cz++) {
 			for (int cx = 0; cx < 32; cx++) {
 				assertEquals(i++, MCAFile.getChunkIndex(cx, cz));
 			}
 		}
 	}

 	public void testChangeData() {
 		MCAFile mcaFile = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
 		assertNotNull(mcaFile);
 		mcaFile.setChunk(0, null);
 		File tmpFile = getNewTmpFile("r.2.2.mca");
 		Integer x = assertThrowsNoException(() -> MCAUtil.writeMCAFile(mcaFile, tmpFile, true));
 		assertNotNull(x);
 		assertEquals(2, x.intValue());
 		MCAFile again = assertThrowsNoException(() -> MCAUtil.readMCAFile(tmpFile));
 		assertNotNull(again);
 		for (int i = 0; i < 1024; i++) {
 			if (i != 512 && i != 1023) {
 				assertNull(again.getChunk(i));
 			} else {
 				assertNotNull(again.getChunk(i));
 			}
 		}
 	}

 	public void testChangeLastUpdate() {
 		MCAFile from = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
 		assertNotNull(from);
 		File tmpFile = getNewTmpFile("r.2.2.mca");
 		assertThrowsNoException(() -> MCAUtil.writeMCAFile(from, tmpFile, true));
 		MCAFile to = assertThrowsNoException(() -> MCAUtil.readMCAFile(tmpFile));
 		assertNotNull(to);
 		assertFalse(from.getChunk(0).getLastMCAUpdate() == to.getChunk(0).getLastMCAUpdate());
 		assertFalse(from.getChunk(512).getLastMCAUpdate() == to.getChunk(512).getLastMCAUpdate());
 		assertFalse(from.getChunk(1023).getLastMCAUpdate() == to.getChunk(1023).getLastMCAUpdate());
 		assertTrue(to.getChunk(0).getLastMCAUpdate() == to.getChunk(512).getLastMCAUpdate());
 		assertTrue(to.getChunk(0).getLastMCAUpdate() == to.getChunk(1023).getLastMCAUpdate());
 	}

 	public void testGetters() {
 		MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
 		assertNotNull(f);

 		assertThrowsRuntimeException(() -> f.getChunk(-1), IndexOutOfBoundsException.class);
 		assertThrowsRuntimeException(() -> f.getChunk(1024), IndexOutOfBoundsException.class);
 		assertNotNull(assertThrowsNoRuntimeException(() -> f.getChunk(0)));
 		assertNotNull(assertThrowsNoRuntimeException(() -> f.getChunk(1023)));
 		assertNotNull(assertThrowsNoRuntimeException(() -> f.getChunk(96, 64)));
 		assertNotNull(assertThrowsNoRuntimeException(() -> f.getChunk(95, 95)));
 		assertNull(assertThrowsNoRuntimeException(() -> f.getChunk(63, 64)));
 		assertNull(assertThrowsNoRuntimeException(() -> f.getChunk(95, 64)));
 		assertNotNull(assertThrowsNoRuntimeException(() -> f.getChunk(64, 96)));
 		assertNull(assertThrowsNoRuntimeException(() -> f.getChunk(64, 63)));
 		assertNull(assertThrowsNoRuntimeException(() -> f.getChunk(64, 95)));
 		//not loaded

 		MCAFile u = new MCAFile(2, 2);
 		assertThrowsRuntimeException(() -> u.getChunk(-1), IndexOutOfBoundsException.class);
 		assertThrowsRuntimeException(() -> u.getChunk(1024), IndexOutOfBoundsException.class);
 		assertNull(assertThrowsNoRuntimeException(() -> u.getChunk(0)));
 		assertNull(assertThrowsNoRuntimeException(() -> u.getChunk(1023)));

 		assertEquals(1628, f.getChunk(0).getDataVersion());
 		assertEquals(1538048269, f.getChunk(0).getLastMCAUpdate());
 		assertEquals(1205486986, f.getChunk(0).getLastUpdate());
 		assertNotNull(f.getChunk(0).getBiomes());
 		assertNull(f.getChunk(0).getHeightMaps());
 		assertNull(f.getChunk(0).getCarvingMasks());
 		assertEquals(new ListTag<>(), f.getChunk(0).getEntities());
 		assertNull(f.getChunk(0).getTileEntities());
 		assertNull(f.getChunk(0).getTileTicks());
 		assertNull(f.getChunk(0).getLiquidTicks());
 		assertNull(f.getChunk(0).getLights());
 		assertNull(f.getChunk(0).getLiquidsToBeTicked());
 		assertNull(f.getChunk(0).getToBeTicked());
 		assertNull(f.getChunk(0).getPostProcessing());
 		assertNotNull(f.getChunk(0).getStructures());

 		assertNotNull(f.getChunk(0).getSection(0).getSkyLight());
 		assertEquals(2048, f.getChunk(0).getSection(0).getSkyLight().length);
 		assertNotNull(f.getChunk(0).getSection(0).getBlockLight());
 		assertEquals(2048, f.getChunk(0).getSection(0).getBlockLight().length);
 		assertNotNull(f.getChunk(0).getSection(0).getBlockStates());
 		assertEquals(256, f.getChunk(0).getSection(0).getBlockStates().length);
 	}

 	private Chunk createChunkWithPos() {
 		CompoundTag data = new CompoundTag();
 		CompoundTag level = new CompoundTag();
 		data.put("Level", level);
 		return new Chunk(data);
 	}

 	public void testSetters() {
 		MCAFile f = new MCAFile(2, 2);

 		assertThrowsNoRuntimeException(() -> f.setChunk(0, createChunkWithPos()));
 		assertEquals(createChunkWithPos().updateHandle(64, 64), f.getChunk(0).updateHandle(64, 64));
 		assertThrowsRuntimeException(() -> f.setChunk(1024, createChunkWithPos()), IndexOutOfBoundsException.class);
 		assertThrowsNoRuntimeException(() -> f.setChunk(1023, createChunkWithPos()));
 		assertThrowsNoRuntimeException(() -> f.setChunk(0, null));
 		assertNull(f.getChunk(0));
 		assertThrowsNoRuntimeException(() -> f.setChunk(1023, createChunkWithPos()));
 		assertThrowsNoRuntimeException(() -> f.setChunk(1023, createChunkWithPos()));

 		f.getChunk(1023).setDataVersion(1627);
 		assertEquals(1627, f.getChunk(1023).getDataVersion());
 		f.getChunk(1023).setLastMCAUpdate(12345678);
 		assertEquals(12345678, f.getChunk(1023).getLastMCAUpdate());
 		f.getChunk(1023).setLastUpdate(87654321);
 		assertEquals(87654321, f.getChunk(1023).getLastUpdate());
 		f.getChunk(1023).setInhabitedTime(13243546);
 		assertEquals(13243546, f.getChunk(1023).getInhabitedTime());
 		assertThrowsRuntimeException(() -> f.getChunk(1023).setBiomes(new int[255]), IllegalArgumentException.class);
 		assertThrowsNoRuntimeException(() -> f.getChunk(1023).setBiomes(new int[256]));
 		assertTrue(Arrays.equals(new int[256], f.getChunk(1023).getBiomes()));
 		f.getChunk(1023).setHeightMaps(getSomeCompoundTag());
 		assertEquals(getSomeCompoundTag(), f.getChunk(1023).getHeightMaps());
 		f.getChunk(1023).setCarvingMasks(getSomeCompoundTag());
 		assertEquals(getSomeCompoundTag(), f.getChunk(1023).getCarvingMasks());
 		f.getChunk(1023).setEntities(getSomeCompoundTagList());
 		assertEquals(getSomeCompoundTagList(), f.getChunk(1023).getEntities());
 		f.getChunk(1023).setTileEntities(getSomeCompoundTagList());
 		assertEquals(getSomeCompoundTagList(), f.getChunk(1023).getTileEntities());
 		f.getChunk(1023).setTileTicks(getSomeCompoundTagList());
 		assertEquals(getSomeCompoundTagList(), f.getChunk(1023).getTileTicks());
 		f.getChunk(1023).setLiquidTicks(getSomeCompoundTagList());
 		assertEquals(getSomeCompoundTagList(), f.getChunk(1023).getLiquidTicks());
 		f.getChunk(1023).setLights(getSomeListTagList());
 		assertEquals(getSomeListTagList(), f.getChunk(1023).getLights());
 		f.getChunk(1023).setLiquidsToBeTicked(getSomeListTagList());
 		assertEquals(getSomeListTagList(), f.getChunk(1023).getLiquidsToBeTicked());
 		f.getChunk(1023).setToBeTicked(getSomeListTagList());
 		assertEquals(getSomeListTagList(), f.getChunk(1023).getToBeTicked());
 		f.getChunk(1023).setPostProcessing(getSomeListTagList());
 		assertEquals(getSomeListTagList(), f.getChunk(1023).getPostProcessing());
 		f.getChunk(1023).setStructures(getSomeCompoundTag());
 		assertEquals(getSomeCompoundTag(), f.getChunk(1023).getStructures());
 		Section s = new Section();
 		f.getChunk(1023).setSection(0, s);
 		assertEquals(s, f.getChunk(1023).getSection(0));
 		assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(null), NullPointerException.class);
 		assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[321]), IllegalArgumentException.class);
 		assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[255]), IllegalArgumentException.class);
 		assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[4097]), IllegalArgumentException.class);
 		assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[320]));
 		assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[4096]));
 		assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[256]));
 		assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockLight(new byte[2047]), IllegalArgumentException.class);
 		assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockLight(new byte[2049]), IllegalArgumentException.class);
 		assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockLight(new byte[2048]));
 		assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockLight(null));
 		assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setSkyLight(new byte[2047]), IllegalArgumentException.class);
 		assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setSkyLight(new byte[2049]), IllegalArgumentException.class);
 		assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setSkyLight(new byte[2048]));
 		assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setSkyLight(null));
 	}

 	public void testGetBiomeAt() {
 		MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
 		assertEquals(21, f.getBiomeAt(1024, 1024));
 		assertEquals(-1, f.getBiomeAt(1040, 1024));
 		f.setChunk(0, 1, Chunk.newChunk());
 		assertEquals(-1, f.getBiomeAt(1024, 1040));

 	}

 	public void testSetBiomeAt() {
 		MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
 		f.setBiomeAt(1024, 1024, 20);
 		assertEquals(20, f.getChunk(64, 64).updateHandle(64, 64).getCompoundTag("Level").getIntArray("Biomes")[0]);
 		f.setBiomeAt(1039, 1039, 47);
 		assertEquals(47, f.getChunk(64, 64).updateHandle(64, 64).getCompoundTag("Level").getIntArray("Biomes")[255]);
 		f.setBiomeAt(1040, 1024, 20);
 		int[] biomes = f.getChunk(65, 64).updateHandle(65, 64).getCompoundTag("Level").getIntArray("Biomes");
 		assertEquals(256, biomes.length);
 		for (int i = 0; i < 256; i++) {
 			assertTrue(i == 0 ? biomes[i] == 20 : biomes[i] == -1);
 		}
 	}

 	public void testCleanupPaletteAndBlockStates() {
 		MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
 		assertThrowsNoRuntimeException(f::cleanupPalettesAndBlockStates);
 		Chunk c = f.getChunk(0, 0);
 		Section s = c.getSection(0);
 		assertEquals(10, s.getPalette().size());
 		for (int i = 11; i <= 15; i++) {
 			s.addToPalette(block("minecraft:" + i));
 		}
 		assertEquals(15, s.getPalette().size());
 		f.cleanupPalettesAndBlockStates();
 		assertEquals(10, s.getPalette().size());
 		assertEquals(256, s.updateHandle(0).getLongArray("BlockStates").length);
 		int y = 0;
 		for (int i = 11; i <= 17; i++) {
 			f.setBlockStateAt(1, y++, 1, block("minecraft:" + i), false);
 		}
 		assertEquals(17, s.getPalette().size());
 		assertEquals(320, s.updateHandle(0).getLongArray("BlockStates").length);
 		f.cleanupPalettesAndBlockStates();
 		assertEquals(17, s.getPalette().size());
 		assertEquals(320, s.updateHandle(0).getLongArray("BlockStates").length);
 		f.setBlockStateAt(1, 0, 1, block("minecraft:bedrock"), false);
 		assertEquals(17, s.getPalette().size());
 		assertEquals(320, s.updateHandle(0).getLongArray("BlockStates").length);
 		f.cleanupPalettesAndBlockStates();
 		assertEquals(16, s.getPalette().size());
 		assertEquals(256, s.updateHandle(0).getLongArray("BlockStates").length);
 	}

 	public void testSetBlockDataAt() {
 		MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
 		Section section = f.getChunk(0, 0).getSection(0);
 		assertEquals(10, section.getPalette().size());
 		assertEquals(0b0001000100010001000100010001000100010001000100010001000100010001L, section.getBlockStates()[0]);
 		f.setBlockStateAt(0, 0, 0, block("minecraft:custom"), false);
 		assertEquals(11, section.getPalette().size());
 		assertEquals(0b0001000100010001000100010001000100010001000100010001000100011010L, section.getBlockStates()[0]);

 		//test "line break"
 		int y = 1;
 		for (int i = 12; i <= 17; i++) {
 			f.setBlockStateAt(0, y++, 0, block("minecraft:" + i), false);
 		}
 		assertEquals(17, section.getPalette().size());
 		assertEquals(320, section.getBlockStates().length);
 		assertEquals(0b0001000010000100001000010000100001000010000100001000010000101010L, section.getBlockStates()[0]);
 		assertEquals(0b0010000100001000010000100001000010000100001000010000100001000010L, section.getBlockStates()[1]);
 		f.setBlockStateAt(12, 0, 0, block("minecraft:18"), false);
 		assertEquals(0b0001000010000100001000010000100001000010000100001000010000101010L, section.getBlockStates()[0]);
 		assertEquals(0b0010000100001000010000100001000010000100001000010000100001000011L, section.getBlockStates()[1]);

 		//test chunkdata == null
 		assertNull(f.getChunk(1, 0));
 		f.setBlockStateAt(17, 0, 0, block("minecraft:test"), false);
 		assertNotNull(f.getChunk(1, 0));
 		ListTag<CompoundTag> s = f.getChunk(1, 0).updateHandle(65, 64).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
 		assertEquals(1, s.size());
 		assertEquals(2, s.get(0).getListTag("Palette").size());
 		assertEquals(256, s.get(0).getLongArray("BlockStates").length);
 		assertEquals(0b0000000000000000000000000000000000000000000000000000000000010000L, s.get(0).getLongArray("BlockStates")[0]);

 		//test section == null
 		assertNull(f.getChunk(66, 64));
 		Chunk c = Chunk.newChunk();
 		f.setChunk(66, 64, c);
 		assertNotNull(f.getChunk(66, 64));
 		ListTag<CompoundTag> ss = f.getChunk(66, 64).updateHandle(66, 64).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
 		assertEquals(0, ss.size());
 		f.setBlockStateAt(33, 0, 0, block("minecraft:air"), false);
 		ss = f.getChunk(66, 64).updateHandle(66, 64).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
 		assertEquals(1, ss.size());
 		f.setBlockStateAt(33, 0, 0, block("minecraft:foo"), false);
 		ss = f.getChunk(66, 64).updateHandle(66, 64).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
 		assertEquals(1, ss.size());
 		assertEquals(2, ss.get(0).getListTag("Palette").size());
 		assertEquals(256, s.get(0).getLongArray("BlockStates").length);
 		assertEquals(0b0000000000000000000000000000000000000000000000000000000000010000L, ss.get(0).getLongArray("BlockStates")[0]);

 		//test force cleanup
 		ListTag<CompoundTag> sss = f.getChunk(31, 31).updateHandle(65, 65).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
 		assertEquals(12, sss.get(0).getListTag("Palette").size());
 		y = 0;
 		for (int i = 13; i <= 17; i++) {
 			f.setBlockStateAt(1008, y++, 1008, block("minecraft:" + i), false);
 		}
 		f.getChunk(31, 31).getSection(0).cleanupPaletteAndBlockStates();
 		sss = f.getChunk(31, 31).updateHandle(65, 65).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
 		assertEquals(17, sss.get(0).getListTag("Palette").size());
 		assertEquals(320, sss.get(0).getLongArray("BlockStates").length);
 		f.setBlockStateAt(1008, 4, 1008, block("minecraft:16"), true);
 		sss = f.getChunk(31, 31).updateHandle(65, 65).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
 		assertEquals(16, sss.get(0).getListTag("Palette").size());
 		assertEquals(256, sss.get(0).getLongArray("BlockStates").length);
 	}

 	public void testGetBlockDataAt() {
 		MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
 		assertEquals(block("minecraft:bedrock"), f.getBlockStateAt(0, 0, 0));
 		assertNull(f.getBlockStateAt(16, 0, 0));
 		assertEquals(block("minecraft:dirt"), f.getBlockStateAt(0, 62, 0));
 		assertEquals(block("minecraft:dirt"), f.getBlockStateAt(15, 67, 15));
 		assertNull(f.getBlockStateAt(3, 100, 3));
 	}

 	public void testGetChunkStatus() {
 		MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
 		assertEquals("mobs_spawned", f.getChunk(0, 0).getStatus());
 	}

 	public void testSetChunkStatus() {
 		MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
 		assertThrowsNoRuntimeException(() -> f.getChunk(0, 0).setStatus("base"));
 		assertEquals("base", f.getChunk(0, 0).updateHandle(64, 64).getCompoundTag("Level").getString("Status"));
 		assertNull(f.getChunk(1, 0));
 	}

 	public void testChunkInitReferences() {
 		CompoundTag t = new CompoundTag();
 		assertThrowsRuntimeException(() -> new Chunk(null), NullPointerException.class);
 		assertThrowsRuntimeException(() -> new Chunk(t), IllegalArgumentException.class);
 	}

 	public void testChunkInvalidCompressionType() {
 		assertThrowsException(() -> {
 			try (RandomAccessFile raf = new RandomAccessFile(getResourceFile("invalid_compression.dat"), "r")) {
 				Chunk c = new Chunk(0);
 				c.deserialize(raf);
 			}
 		}, IOException.class);
 	}

 	public void testChunkInvalidDataTag() {
 		assertThrowsException(() -> {
 			try (RandomAccessFile raf = new RandomAccessFile(getResourceFile("invalid_data_tag.dat"), "r")) {
 				Chunk c = new Chunk(0);
 				c.deserialize(raf);
 			}
 		}, IOException.class);
 	}
 }
	package net.querz.nbt.mca;

	import net.querz.nbt.ByteTag;
	import net.querz.nbt.CompoundTag;
	import net.querz.nbt.ListTag;

	import java.io.DataOutputStream;
	import java.io.File;
	import java.io.FileNotFoundException;
	import java.io.FileOutputStream;
	import java.io.IOException;
	import java.io.RandomAccessFile;
	import java.nio.file.Files;
	import java.util.Arrays;

	public class MCAFileTest extends MCATestCase {

	public void testGetChunkIndex() {
	assertEquals(0, MCAFile.getChunkIndex(0, 0));
	assertEquals(0, MCAFile.getChunkIndex(32, 32));
	assertEquals(0, MCAFile.getChunkIndex(-32, -32));
	assertEquals(0, MCAFile.getChunkIndex(0, 32));
	assertEquals(0, MCAFile.getChunkIndex(-32, 32));
	assertEquals(1023, MCAFile.getChunkIndex(31, 31));
	assertEquals(1023, MCAFile.getChunkIndex(-1, -1));
	assertEquals(1023, MCAFile.getChunkIndex(63, 63));
	assertEquals(632, MCAFile.getChunkIndex(24, -13));
	int i = 0;
	for (int cz = 0; cz < 32; cz++) {
	for (int cx = 0; cx < 32; cx++) {
	assertEquals(i++, MCAFile.getChunkIndex(cx, cz));
	}
	}
	}

	public void testChangeData() {
	MCAFile mcaFile = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
	assertNotNull(mcaFile);
	mcaFile.setChunk(0, null);
	File tmpFile = getNewTmpFile("r.2.2.mca");
	Integer x = assertThrowsNoException(() -> MCAUtil.writeMCAFile(mcaFile, tmpFile, true));
	assertNotNull(x);
	assertEquals(2, x.intValue());
	MCAFile again = assertThrowsNoException(() -> MCAUtil.readMCAFile(tmpFile));
	assertNotNull(again);
	for (int i = 0; i < 1024; i++) {
	if (i != 512 && i != 1023) {
	assertNull(again.getChunk(i));
	} else {
	assertNotNull(again.getChunk(i));
	}
	}
	}

	public void testChangeLastUpdate() {
	MCAFile from = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
	assertNotNull(from);
	File tmpFile = getNewTmpFile("r.2.2.mca");
	assertThrowsNoException(() -> MCAUtil.writeMCAFile(from, tmpFile, true));
	MCAFile to = assertThrowsNoException(() -> MCAUtil.readMCAFile(tmpFile));
	assertNotNull(to);
	assertFalse(from.getChunk(0).getLastMCAUpdate() == to.getChunk(0).getLastMCAUpdate());
	assertFalse(from.getChunk(512).getLastMCAUpdate() == to.getChunk(512).getLastMCAUpdate());
	assertFalse(from.getChunk(1023).getLastMCAUpdate() == to.getChunk(1023).getLastMCAUpdate());
	assertTrue(to.getChunk(0).getLastMCAUpdate() == to.getChunk(512).getLastMCAUpdate());
	assertTrue(to.getChunk(0).getLastMCAUpdate() == to.getChunk(1023).getLastMCAUpdate());
	}

	public void testGetters() {
	MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
	assertNotNull(f);

	assertThrowsRuntimeException(() -> f.getChunk(-1), IndexOutOfBoundsException.class);
	assertThrowsRuntimeException(() -> f.getChunk(1024), IndexOutOfBoundsException.class);
	assertNotNull(assertThrowsNoRuntimeException(() -> f.getChunk(0)));
	assertNotNull(assertThrowsNoRuntimeException(() -> f.getChunk(1023)));
	assertNotNull(assertThrowsNoRuntimeException(() -> f.getChunk(96, 64)));
	assertNotNull(assertThrowsNoRuntimeException(() -> f.getChunk(95, 95)));
	assertNull(assertThrowsNoRuntimeException(() -> f.getChunk(63, 64)));
	assertNull(assertThrowsNoRuntimeException(() -> f.getChunk(95, 64)));
	assertNotNull(assertThrowsNoRuntimeException(() -> f.getChunk(64, 96)));
	assertNull(assertThrowsNoRuntimeException(() -> f.getChunk(64, 63)));
	assertNull(assertThrowsNoRuntimeException(() -> f.getChunk(64, 95)));
	//not loaded

	MCAFile u = new MCAFile(2, 2);
	assertThrowsRuntimeException(() -> u.getChunk(-1), IndexOutOfBoundsException.class);
	assertThrowsRuntimeException(() -> u.getChunk(1024), IndexOutOfBoundsException.class);
	assertNull(assertThrowsNoRuntimeException(() -> u.getChunk(0)));
	assertNull(assertThrowsNoRuntimeException(() -> u.getChunk(1023)));

	assertEquals(1628, f.getChunk(0).getDataVersion());
	assertEquals(1538048269, f.getChunk(0).getLastMCAUpdate());
	assertEquals(1205486986, f.getChunk(0).getLastUpdate());
	assertNotNull(f.getChunk(0).getBiomes());
	assertNull(f.getChunk(0).getHeightMaps());
	assertNull(f.getChunk(0).getCarvingMasks());
	assertEquals(new ListTag<>(), f.getChunk(0).getEntities());
	assertNull(f.getChunk(0).getTileEntities());
	assertNull(f.getChunk(0).getTileTicks());
	assertNull(f.getChunk(0).getLiquidTicks());
	assertNull(f.getChunk(0).getLights());
	assertNull(f.getChunk(0).getLiquidsToBeTicked());
	assertNull(f.getChunk(0).getToBeTicked());
	assertNull(f.getChunk(0).getPostProcessing());
	assertNotNull(f.getChunk(0).getStructures());

	assertNotNull(f.getChunk(0).getSection(0).getSkyLight());
	assertEquals(2048, f.getChunk(0).getSection(0).getSkyLight().length);
	assertNotNull(f.getChunk(0).getSection(0).getBlockLight());
	assertEquals(2048, f.getChunk(0).getSection(0).getBlockLight().length);
	assertNotNull(f.getChunk(0).getSection(0).getBlockStates());
	assertEquals(256, f.getChunk(0).getSection(0).getBlockStates().length);
	}

	private Chunk createChunkWithPos() {
	CompoundTag data = new CompoundTag();
	CompoundTag level = new CompoundTag();
	data.put("Level", level);
	return new Chunk(data);
	}

	public void testSetters() {
	MCAFile f = new MCAFile(2, 2);

	assertThrowsNoRuntimeException(() -> f.setChunk(0, createChunkWithPos()));
	assertEquals(createChunkWithPos().updateHandle(64, 64), f.getChunk(0).updateHandle(64, 64));
	assertThrowsRuntimeException(() -> f.setChunk(1024, createChunkWithPos()), IndexOutOfBoundsException.class);
	assertThrowsNoRuntimeException(() -> f.setChunk(1023, createChunkWithPos()));
	assertThrowsNoRuntimeException(() -> f.setChunk(0, null));
	assertNull(f.getChunk(0));
	assertThrowsNoRuntimeException(() -> f.setChunk(1023, createChunkWithPos()));
	assertThrowsNoRuntimeException(() -> f.setChunk(1023, createChunkWithPos()));

	f.getChunk(1023).setDataVersion(1627);
	assertEquals(1627, f.getChunk(1023).getDataVersion());
	f.getChunk(1023).setLastMCAUpdate(12345678);
	assertEquals(12345678, f.getChunk(1023).getLastMCAUpdate());
	f.getChunk(1023).setLastUpdate(87654321);
	assertEquals(87654321, f.getChunk(1023).getLastUpdate());
	f.getChunk(1023).setInhabitedTime(13243546);
	assertEquals(13243546, f.getChunk(1023).getInhabitedTime());
	assertThrowsRuntimeException(() -> f.getChunk(1023).setBiomes(new int[255]), IllegalArgumentException.class);
	assertThrowsNoRuntimeException(() -> f.getChunk(1023).setBiomes(new int[256]));
	assertTrue(Arrays.equals(new int[256], f.getChunk(1023).getBiomes()));
	f.getChunk(1023).setHeightMaps(getSomeCompoundTag());
	assertEquals(getSomeCompoundTag(), f.getChunk(1023).getHeightMaps());
	f.getChunk(1023).setCarvingMasks(getSomeCompoundTag());
	assertEquals(getSomeCompoundTag(), f.getChunk(1023).getCarvingMasks());
	f.getChunk(1023).setEntities(getSomeCompoundTagList());
	assertEquals(getSomeCompoundTagList(), f.getChunk(1023).getEntities());
	f.getChunk(1023).setTileEntities(getSomeCompoundTagList());
	assertEquals(getSomeCompoundTagList(), f.getChunk(1023).getTileEntities());
	f.getChunk(1023).setTileTicks(getSomeCompoundTagList());
	assertEquals(getSomeCompoundTagList(), f.getChunk(1023).getTileTicks());
	f.getChunk(1023).setLiquidTicks(getSomeCompoundTagList());
	assertEquals(getSomeCompoundTagList(), f.getChunk(1023).getLiquidTicks());
	f.getChunk(1023).setLights(getSomeListTagList());
	assertEquals(getSomeListTagList(), f.getChunk(1023).getLights());
	f.getChunk(1023).setLiquidsToBeTicked(getSomeListTagList());
	assertEquals(getSomeListTagList(), f.getChunk(1023).getLiquidsToBeTicked());
	f.getChunk(1023).setToBeTicked(getSomeListTagList());
	assertEquals(getSomeListTagList(), f.getChunk(1023).getToBeTicked());
	f.getChunk(1023).setPostProcessing(getSomeListTagList());
	assertEquals(getSomeListTagList(), f.getChunk(1023).getPostProcessing());
	f.getChunk(1023).setStructures(getSomeCompoundTag());
	assertEquals(getSomeCompoundTag(), f.getChunk(1023).getStructures());
	Section s = new Section();
	f.getChunk(1023).setSection(0, s);
	assertEquals(s, f.getChunk(1023).getSection(0));
	assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(null), NullPointerException.class);
	assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[321]), IllegalArgumentException.class);
	assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[255]), IllegalArgumentException.class);
	assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[4097]), IllegalArgumentException.class);
	assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[320]));
	assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[4096]));
	assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockStates(new long[256]));
	assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockLight(new byte[2047]), IllegalArgumentException.class);
	assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockLight(new byte[2049]), IllegalArgumentException.class);
	assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockLight(new byte[2048]));
	assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setBlockLight(null));
	assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setSkyLight(new byte[2047]), IllegalArgumentException.class);
	assertThrowsRuntimeException(() -> f.getChunk(1023).getSection(0).setSkyLight(new byte[2049]), IllegalArgumentException.class);
	assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setSkyLight(new byte[2048]));
	assertThrowsNoRuntimeException(() -> f.getChunk(1023).getSection(0).setSkyLight(null));
	}

	public void testGetBiomeAt() {
	MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
	assertEquals(21, f.getBiomeAt(1024, 1024));
	assertEquals(-1, f.getBiomeAt(1040, 1024));
	f.setChunk(0, 1, Chunk.newChunk());
	assertEquals(-1, f.getBiomeAt(1024, 1040));

	}

	public void testSetBiomeAt() {
	MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
	f.setBiomeAt(1024, 1024, 20);
	assertEquals(20, f.getChunk(64, 64).updateHandle(64, 64).getCompoundTag("Level").getIntArray("Biomes")[0]);
	f.setBiomeAt(1039, 1039, 47);
	assertEquals(47, f.getChunk(64, 64).updateHandle(64, 64).getCompoundTag("Level").getIntArray("Biomes")[255]);
	f.setBiomeAt(1040, 1024, 20);
	int[] biomes = f.getChunk(65, 64).updateHandle(65, 64).getCompoundTag("Level").getIntArray("Biomes");
	assertEquals(256, biomes.length);
	for (int i = 0; i < 256; i++) {
	assertTrue(i == 0 ? biomes[i] == 20 : biomes[i] == -1);
	}
	}

	public void testCleanupPaletteAndBlockStates() {
	MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
	assertThrowsNoRuntimeException(f::cleanupPalettesAndBlockStates);
	Chunk c = f.getChunk(0, 0);
	Section s = c.getSection(0);
	assertEquals(10, s.getPalette().size());
	for (int i = 11; i <= 15; i++) {
	s.addToPalette(block("minecraft:" + i));
	}
	assertEquals(15, s.getPalette().size());
	f.cleanupPalettesAndBlockStates();
	assertEquals(10, s.getPalette().size());
	assertEquals(256, s.updateHandle(0).getLongArray("BlockStates").length);
	int y = 0;
	for (int i = 11; i <= 17; i++) {
	f.setBlockStateAt(1, y++, 1, block("minecraft:" + i), false);
	}
	assertEquals(17, s.getPalette().size());
	assertEquals(320, s.updateHandle(0).getLongArray("BlockStates").length);
	f.cleanupPalettesAndBlockStates();
	assertEquals(17, s.getPalette().size());
	assertEquals(320, s.updateHandle(0).getLongArray("BlockStates").length);
	f.setBlockStateAt(1, 0, 1, block("minecraft:bedrock"), false);
	assertEquals(17, s.getPalette().size());
	assertEquals(320, s.updateHandle(0).getLongArray("BlockStates").length);
	f.cleanupPalettesAndBlockStates();
	assertEquals(16, s.getPalette().size());
	assertEquals(256, s.updateHandle(0).getLongArray("BlockStates").length);
	}

	public void testSetBlockDataAt() {
	MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
	Section section = f.getChunk(0, 0).getSection(0);
	assertEquals(10, section.getPalette().size());
	assertEquals(0b0001000100010001000100010001000100010001000100010001000100010001L, section.getBlockStates()[0]);
	f.setBlockStateAt(0, 0, 0, block("minecraft:custom"), false);
	assertEquals(11, section.getPalette().size());
	assertEquals(0b0001000100010001000100010001000100010001000100010001000100011010L, section.getBlockStates()[0]);

	//test "line break"
	int y = 1;
	for (int i = 12; i <= 17; i++) {
	f.setBlockStateAt(0, y++, 0, block("minecraft:" + i), false);
	}
	assertEquals(17, section.getPalette().size());
	assertEquals(320, section.getBlockStates().length);
	assertEquals(0b0001000010000100001000010000100001000010000100001000010000101010L, section.getBlockStates()[0]);
	assertEquals(0b0010000100001000010000100001000010000100001000010000100001000010L, section.getBlockStates()[1]);
	f.setBlockStateAt(12, 0, 0, block("minecraft:18"), false);
	assertEquals(0b0001000010000100001000010000100001000010000100001000010000101010L, section.getBlockStates()[0]);
	assertEquals(0b0010000100001000010000100001000010000100001000010000100001000011L, section.getBlockStates()[1]);

	//test chunkdata == null
	assertNull(f.getChunk(1, 0));
	f.setBlockStateAt(17, 0, 0, block("minecraft:test"), false);
	assertNotNull(f.getChunk(1, 0));
	ListTag<CompoundTag> s = f.getChunk(1, 0).updateHandle(65, 64).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
	assertEquals(1, s.size());
	assertEquals(2, s.get(0).getListTag("Palette").size());
	assertEquals(256, s.get(0).getLongArray("BlockStates").length);
	assertEquals(0b0000000000000000000000000000000000000000000000000000000000010000L, s.get(0).getLongArray("BlockStates")[0]);

	//test section == null
	assertNull(f.getChunk(66, 64));
	Chunk c = Chunk.newChunk();
	f.setChunk(66, 64, c);
	assertNotNull(f.getChunk(66, 64));
	ListTag<CompoundTag> ss = f.getChunk(66, 64).updateHandle(66, 64).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
	assertEquals(0, ss.size());
	f.setBlockStateAt(33, 0, 0, block("minecraft:air"), false);
	ss = f.getChunk(66, 64).updateHandle(66, 64).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
	assertEquals(1, ss.size());
	f.setBlockStateAt(33, 0, 0, block("minecraft:foo"), false);
	ss = f.getChunk(66, 64).updateHandle(66, 64).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
	assertEquals(1, ss.size());
	assertEquals(2, ss.get(0).getListTag("Palette").size());
	assertEquals(256, s.get(0).getLongArray("BlockStates").length);
	assertEquals(0b0000000000000000000000000000000000000000000000000000000000010000L, ss.get(0).getLongArray("BlockStates")[0]);

	//test force cleanup
	ListTag<CompoundTag> sss = f.getChunk(31, 31).updateHandle(65, 65).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
	assertEquals(12, sss.get(0).getListTag("Palette").size());
	y = 0;
	for (int i = 13; i <= 17; i++) {
	f.setBlockStateAt(1008, y++, 1008, block("minecraft:" + i), false);
	}
	f.getChunk(31, 31).getSection(0).cleanupPaletteAndBlockStates();
	sss = f.getChunk(31, 31).updateHandle(65, 65).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
	assertEquals(17, sss.get(0).getListTag("Palette").size());
	assertEquals(320, sss.get(0).getLongArray("BlockStates").length);
	f.setBlockStateAt(1008, 4, 1008, block("minecraft:16"), true);
	sss = f.getChunk(31, 31).updateHandle(65, 65).getCompoundTag("Level").getListTag("Sections").asCompoundTagList();
	assertEquals(16, sss.get(0).getListTag("Palette").size());
	assertEquals(256, sss.get(0).getLongArray("BlockStates").length);
	}

	public void testGetBlockDataAt() {
	MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
	assertEquals(block("minecraft:bedrock"), f.getBlockStateAt(0, 0, 0));
	assertNull(f.getBlockStateAt(16, 0, 0));
	assertEquals(block("minecraft:dirt"), f.getBlockStateAt(0, 62, 0));
	assertEquals(block("minecraft:dirt"), f.getBlockStateAt(15, 67, 15));
	assertNull(f.getBlockStateAt(3, 100, 3));
	}

	public void testGetChunkStatus() {
	MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
	assertEquals("mobs_spawned", f.getChunk(0, 0).getStatus());
	}

	public void testSetChunkStatus() {
	MCAFile f = assertThrowsNoException(() -> MCAUtil.readMCAFile(copyResourceToTmp("r.2.2.mca")));
	assertThrowsNoRuntimeException(() -> f.getChunk(0, 0).setStatus("base"));
	assertEquals("base", f.getChunk(0, 0).updateHandle(64, 64).getCompoundTag("Level").getString("Status"));
	assertNull(f.getChunk(1, 0));
	}

	public void testChunkInitReferences() {
	CompoundTag t = new CompoundTag();
	assertThrowsRuntimeException(() -> new Chunk(null), NullPointerException.class);
	assertThrowsRuntimeException(() -> new Chunk(t), IllegalArgumentException.class);
	}

	public void testChunkInvalidCompressionType() {
	assertThrowsException(() -> {
	try (RandomAccessFile raf = new RandomAccessFile(getResourceFile("invalid_compression.dat"), "r")) {
	Chunk c = new Chunk(0);
	c.deserialize(raf);
	}
	}, IOException.class);
	}

	public void testChunkInvalidDataTag() {
	assertThrowsException(() -> {
	try (RandomAccessFile raf = new RandomAccessFile(getResourceFile("invalid_data_tag.dat"), "r")) {
	Chunk c = new Chunk(0);
	c.deserialize(raf);
	}
	}, IOException.class);
	}
	}