diff --git a/src/test/java/cn/nukkit/test/AngleTest.java b/src/test/java/cn/nukkit/test/AngleTest.java
deleted file mode 100644
index c2067c2e..00000000
--- a/src/test/java/cn/nukkit/test/AngleTest.java
+++ /dev/null
@@ -1,69 +0,0 @@
-package cn.nukkit.test;
-
-import cn.nukkit.math.Angle;
-import org.junit.jupiter.api.DisplayName;
-import org.junit.jupiter.api.Test;
-
-import static cn.nukkit.math.Angle.*;
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
-/**
- * Copyright 2017 lmlstarqaq
- * All rights reserved.
- */
-
-@DisplayName("Angle")
-class AngleTest {
-
-	@DisplayName("Angle operations")
-	@Test
-	void testAngle() {
-		Angle rd1 = fromRadian(1.0);
-		Angle rf1 = fromRadian(1.0f);
-		Angle dd1 = fromDegree(180.0);
-		Angle df1 = fromDegree(180.0f);
-
-		assertEquals("57.29578\t57.29577951308232\t1.0\t1.0", rd1.asFloatDegree() + "\t" + rd1.asDoubleDegree() + "\t" + rd1.asFloatRadian() + "\t" + rd1.asDoubleRadian());
-		assertEquals("57.295776\t57.29577951308232\t1.0\t1.0", rf1.asFloatDegree() + "\t" + rf1.asDoubleDegree() + "\t" + rf1.asFloatRadian() + "\t" + rf1.asDoubleRadian());
-		assertEquals("180.0\t180.0\t3.1415927\t3.141592653589793", dd1.asFloatDegree() + "\t" + dd1.asDoubleDegree() + "\t" + dd1.asFloatRadian() + "\t" + dd1.asDoubleRadian());
-		assertEquals("180.0\t180.0\t3.1415927\t3.141592653589793", df1.asFloatDegree() + "\t" + df1.asDoubleDegree() + "\t" + df1.asFloatRadian() + "\t" + df1.asDoubleRadian());
-		assertEquals("Angle[Double, 1.000000rad = 57.295780deg] [1072693248]", rd1.toString());
-		assertEquals("Angle[Float, 1.000000rad = 57.295776deg] [1065353216]", rf1.toString());
-		assertEquals("Angle[Double, 180.000000deg = 3.141593rad] [-341077452]", dd1.toString());
-		assertEquals("Angle[Float, 180.000000deg = 3.141593rad] [-386330060]", df1.toString());
-
-		Angle rd2 = fromRadian(200.0);
-		Angle rf2 = fromRadian(200.0f);
-		Angle dd2 = fromDegree(23333.33);
-		Angle df2 = fromDegree(23333.33f);
-
-		assertEquals("11459.156\t11459.155902616465\t200.0\t200.0", rd2.asFloatDegree() + "\t" + rd2.asDoubleDegree() + "\t" + rd2.asFloatRadian() + "\t" + rd2.asDoubleRadian());
-		assertEquals("11459.155\t11459.155902616465\t200.0\t200.0", rf2.asFloatDegree() + "\t" + rf2.asDoubleDegree() + "\t" + rf2.asFloatRadian() + "\t" + rf2.asDoubleRadian());
-		assertEquals("23333.33\t23333.33\t407.24344\t407.24343395436847", dd2.asFloatDegree() + "\t" + dd2.asDoubleDegree() + "\t" + dd2.asFloatRadian() + "\t" + dd2.asDoubleRadian());
-		assertEquals("23333.33\t23333.330078125\t407.24344\t407.243435317907", df2.asFloatDegree() + "\t" + df2.asDoubleDegree() + "\t" + df2.asFloatRadian() + "\t" + df2.asDoubleRadian());
-
-		assertEquals("0.8414709848078965\t0.5403023058681398\t1.5574077246549023", rd1.sin() + "\t" + rd1.cos() + "\t" +rd1.tan());
-		assertEquals("1.2246467991473532E-16\t-1.0\t-1.2246467991473532E-16", dd1.sin() + "\t" + dd1.cos() + "\t" +dd1.tan());
-
-		Angle asin1 = asin(1);
-		Angle asin2 = asin(1.0/2.0);
-		Angle acos1 = acos(1);
-		Angle acos2 = acos(1.0/2.0);
-		Angle atan1 = atan(1);
-		Angle atan2 = atan(1.0/2.0);
-
-		assertEquals("Angle[Double, 1.570796rad = 90.000000deg] [1807551715]\tAngle[Double, 0.000000rad = 0.000000deg] [0]\tAngle[Double, 0.785398rad = 45.000000deg] [1806503139]",
-				asin1.toString() + "\t" + acos1.toString() + "\t" + atan1.toString());
-		assertEquals("Angle[Double, 0.523599rad = 30.000000deg] [130921012]\tAngle[Double, 1.047198rad = 60.000000deg] [131969588]\tAngle[Double, 0.463648rad = 26.565051deg] [985405224]",
-				asin2.toString() + "\t" + acos2.toString() + "\t" + atan2.toString());
-
-		assertEquals(1, compare(asin(2.0/3.0), asin(1.0/2.0)));
-
-		assertEquals("Angle[Double, 22.000000rad = 1260.507149deg] [1077280768]\tAngle[Float, 22.000000rad = 1260.507080deg] [1102053376]",
-				fromRadian(22.0d).toString() + "\t" + fromRadian(22.0f).toString());
-		assertEquals("Angle[Double, 1.000000rad = 57.295780deg] [1072693248]\tAngle[Double, 57.295780deg = 1.000000rad] [-236816880]",
-						fromRadian(1.0d).toString() + "\t" + fromDegree(57.29577951308232d).toString());
-		assertEquals("Angle[Double, 1.000000rad = 57.295780deg] [1072693248]\tAngle[Double, 1.000000deg = 0.017453rad] [-1807936972]",
-				fromRadian(1.0d).toString() + "\t" + fromDegree(1.0d).toString());
-	}
-}
diff --git a/src/test/java/cn/nukkit/test/ClientChainDataTest.java b/src/test/java/cn/nukkit/test/ClientChainDataTest.java
deleted file mode 100644
index a6cec4b8..00000000
--- a/src/test/java/cn/nukkit/test/ClientChainDataTest.java
+++ /dev/null
@@ -1,65 +0,0 @@
-package cn.nukkit.test;
-
-import cn.nukkit.utils.ClientChainData;
-import org.junit.jupiter.api.DisplayName;
-import org.junit.jupiter.api.Test;
-
-import java.io.ByteArrayOutputStream;
-import java.io.InputStream;
-
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
-/**
- * An example to show how to use ClientChainData
- * This is also a test for client chain data.
- *
- * By lmlstarqaq http://snake1999.com/
- * Creation time: 2017/6/7 15:07.
- */
-@DisplayName("ClientChainData")
-class ClientChainDataTest {
-
-	@DisplayName("Getters")
-	@Test
-	void testGetter() throws Exception {
-		InputStream is = ClientChainDataTest.class.getResourceAsStream("chain.dat");
-		ClientChainData data = ClientChainData.of(readStream(is));
-		String got = String.format("userName=%s, clientUUID=%s, " +
-						"identityPublicKey=%s, clientId=%d, " +
-						"serverAddress=%s, deviceModel=%s, " +
-						"deviceOS=%d, gameVersion=%s, " +
-						"guiScale=%d, languageCode=%s, " +
-						"xuid=%s, currentInputMode=%d, " +
-						"defaultInputMode=%d, UIProfile=%d"
-				,
-				data.getUsername(), data.getClientUUID(),
-				data.getIdentityPublicKey(), data.getClientId(),
-				data.getServerAddress(), data.getDeviceModel(),
-				data.getDeviceOS(), data.getGameVersion(),
-				data.getGuiScale(), data.getLanguageCode(),
-				data.getXUID(), data.getCurrentInputMode(),
-				data.getDefaultInputMode(), data.getUIProfile()
-		);
-		String expecting = "userName=lmlstarqaq, clientUUID=8323afe1-641e-3b61-9a92-d5d20b279065, " +
-				"identityPublicKey=MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAE4lyvA1iVhV2u3pLQqJAjJnJZSlSjib8mM1uB5h5yqOBSvCHW+nZxDmkOAW6MS1GA7yGHitGmfS4jW/yUISUdWvLzEWJYOzphb3GNh5J1oLJRwESc5278i4MEDk1y21/q, " +
-				"clientId=-6315607246631494544, " +
-				"serverAddress=192.168.1.108:19132, deviceModel=iPhone6,2, " +
-				"deviceOS=2, gameVersion=1.1.0, " +
-				"guiScale=0, languageCode=zh_CN, " +
-				"xuid=2535465134455915, currentInputMode=2, " +
-				"defaultInputMode=2, UIProfile=1";
-		assertEquals(got, expecting);
-	}
-
-	private static byte[] readStream(InputStream inStream) throws Exception {
-		ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
-		byte[] buffer = new byte[65536];
-		int len;
-		while ((len = inStream.read(buffer)) != -1) {
-			outSteam.write(buffer, 0, len);
-		}
-		outSteam.close();
-		inStream.close();
-		return outSteam.toByteArray();
-	}
-}
diff --git a/src/test/java/cn/nukkit/test/VarIntTest.java b/src/test/java/cn/nukkit/test/VarIntTest.java
deleted file mode 100644
index 8ed80839..00000000
--- a/src/test/java/cn/nukkit/test/VarIntTest.java
+++ /dev/null
@@ -1,122 +0,0 @@
-package cn.nukkit.test;
-
-import cn.nukkit.utils.BinaryStream;
-import cn.nukkit.utils.VarInt;
-import org.junit.jupiter.api.DisplayName;
-import org.junit.jupiter.api.Test;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-
-import static org.junit.jupiter.api.Assertions.assertAll;
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
-/**
- * By lmlstarqaq http://snake1999.com/
- * Creation time: 2017/7/5 23:22.
- */
-@DisplayName("VarInt")
-class VarIntTest {
-
-	@DisplayName("ZigZag")
-	@Test
-	void testZigZag() {
-		assertAll(
-				() -> assertEquals(0x2468acf0, VarInt.encodeZigZag32(0x12345678)),
-				() -> assertEquals(0x2b826b1d, VarInt.encodeZigZag32(0xea3eca71)),
-				() -> assertEquals(0x12345678, VarInt.decodeZigZag32(0x2468acf0)),
-				() -> assertEquals(0xea3eca71, VarInt.decodeZigZag32(0x2b826b1d)),
-				() -> assertEquals(2623536930346282224L, VarInt.encodeZigZag64(0x1234567812345678L)),
-				() -> assertEquals(3135186066796324391L, VarInt.encodeZigZag64(0xea3eca710becececL)),
-				() -> assertEquals(0x1234567812345678L, VarInt.decodeZigZag64(2623536930346282224L)),
-				() -> assertEquals(0xea3eca710becececL, VarInt.decodeZigZag64(3135186066796324391L))
-		);
-	}
-
-	@DisplayName("Writing")
-	@Test
-	void testWrite() throws IOException {
-		BinaryStream bs = new BinaryStream();
-		VarInt.writeUnsignedVarInt(bs, 237356812);
-		VarInt.writeVarInt(bs, 0xea3eca71);
-		VarInt.writeUnsignedVarLong(bs, 0x1234567812345678L);
-		VarInt.writeVarLong(bs, 0xea3eca710becececL);
-		assertAll(
-				() -> assertEquals(237356812, VarInt.readUnsignedVarInt(bs)),
-				() -> assertEquals(0xea3eca71, VarInt.readVarInt(bs)),
-				() -> assertEquals(0x1234567812345678L, VarInt.readUnsignedVarLong(bs)),
-				() -> assertEquals(0xea3eca710becececL, VarInt.readVarLong(bs))
-		);
-		ByteArrayOutputStream os = new ByteArrayOutputStream();
-		VarInt.writeUnsignedVarInt(os, 237356812);
-		VarInt.writeVarInt(os, 0xea3eca71);
-		VarInt.writeUnsignedVarLong(os, 0x1234567812345678L);
-		VarInt.writeVarLong(os, 0xea3eca710becececL);
-		VarInt.writeVarInt(os, 0x7FFFFFFF);
-		VarInt.writeVarInt(os, -1);
-		ByteArrayInputStream is = new ByteArrayInputStream(os.toByteArray());
-		assertAll(
-				() -> assertEquals(237356812, VarInt.readUnsignedVarInt(is)),
-				() -> assertEquals(0xea3eca71, VarInt.readVarInt(is)),
-				() -> assertEquals(0x1234567812345678L, VarInt.readUnsignedVarLong(is)),
-				() -> assertEquals(0xea3eca710becececL, VarInt.readVarLong(is)),
-				() -> assertEquals(0x7FFFFFFF, VarInt.readVarInt(is)),
-				() -> assertEquals(-1, VarInt.readVarInt(is))
-		);
-	}
-
-	@DisplayName("Write Sizes")
-	@Test
-	void testSizes() throws IOException {
-		sizeTest(w -> VarInt.writeVarLong(w, 0x7FFFFFFF /* -1 >>> 1 */), 5);
-		sizeTest(w -> VarInt.writeVarInt(w, 0x7FFFFFFF /* -1 >>> 1 */), 5);
-		sizeTest(w -> VarInt.writeVarLong(w, -1), 1);
-		sizeTest(w -> VarInt.writeVarInt(w, -1), 1);
-	}
-
-	@DisplayName("Reading")
-	@Test
-	void testRead() {
-		assertAll(
-				() -> assertEquals(2412, VarInt.readUnsignedVarInt(wrapBinaryStream("EC123EC456"))),
-				() -> assertEquals(583868, VarInt.readUnsignedVarInt(wrapBinaryStream("BCD123EFA0"))),
-				() -> assertEquals(1206, VarInt.readVarInt(wrapBinaryStream("EC123EC456"))),
-				() -> assertEquals(291934, VarInt.readVarInt(wrapBinaryStream("BCD123EFA0"))),
-				() -> assertEquals(6015, VarInt.readUnsignedVarLong(wrapBinaryStream("FF2EC456EC789EC012EC"))),
-				() -> assertEquals(3694, VarInt.readUnsignedVarLong(wrapBinaryStream("EE1CD34BCD56BCD78BCD"))),
-				() -> assertEquals(-3008, VarInt.readVarLong(wrapBinaryStream("FF2EC456EC789EC012EC"))),
-				() -> assertEquals(1847, VarInt.readVarLong(wrapBinaryStream("EE1CD34BCD56BCD78BCD")))
-		);
-	}
-
-	private static BinaryStream wrapBinaryStream(String hex) {
-		return new BinaryStream(hexStringToByte(hex));
-	}
-
-	private static byte[] hexStringToByte(String hex) {
-		int len = (hex.length() / 2);
-		byte[] result = new byte[len];
-		char[] aChar = hex.toCharArray();
-		for (int i = 0; i < len; i++) {
-			int pos = i * 2;
-			result[i] = (byte) (toByte(aChar[pos]) << 4 | toByte(aChar[pos + 1]));
-		}
-		return result;
-	}
-
-	private static byte toByte(char c) {
-		return (byte) "0123456789ABCDEF".indexOf(c);
-	}
-
-	private interface TestConsumer<T> {
-		void accept(T t) throws IOException;
-	}
-
-	private void sizeTest(TestConsumer<ByteArrayOutputStream> write, int size) throws IOException {
-		ByteArrayOutputStream os = new ByteArrayOutputStream();
-		write.accept(os);
-		ByteArrayInputStream is = new ByteArrayInputStream(os.toByteArray());
-		assertEquals(size, is.available());
-	};
-}
diff --git a/src/test/java/cn/nukkit/test/ZlibTest.java b/src/test/java/cn/nukkit/test/ZlibTest.java
deleted file mode 100644
index fedde89f..00000000
--- a/src/test/java/cn/nukkit/test/ZlibTest.java
+++ /dev/null
@@ -1,21 +0,0 @@
-package cn.nukkit.test;
-
-import cn.nukkit.utils.Zlib;
-import org.junit.jupiter.api.DisplayName;
-import org.junit.jupiter.api.Test;
-
-import static org.junit.jupiter.api.Assertions.assertArrayEquals;
-
-@DisplayName("Zlib")
-class ZlibTest {
-
-    @DisplayName("Inflate and Deflate")
-    @Test
-    void testAll() throws Exception {
-        byte[] in = "lmlstarqaq".getBytes();
-        byte[] compressed = Zlib.deflate(in);
-        byte[] out = Zlib.inflate(compressed);
-        assertArrayEquals(in, out);
-    }
-
-}
diff --git a/src/test/resources/cn/nukkit/test/chain.dat b/src/test/resources/cn/nukkit/test/chain.dat
deleted file mode 100644
index 9c69e4f9..00000000
Binary files a/src/test/resources/cn/nukkit/test/chain.dat and /dev/null differ