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Testing Core Gameplay Systems Implementation in Mindustry

This comprehensive test suite validates core functionality of the Mindustry game engine, including block behavior, liquid/item transport, unit interactions, and save/load operations. The tests ensure proper game mechanics and data persistence.

Test Coverage Overview

Tests cover essential game systems including:
  • Block placement, destruction and interactions
  • Liquid and item transport mechanics
  • Unit behaviors and building capabilities
  • Save/load functionality and data persistence
  • Map generation and sector validation

Implementation Analysis

The test suite employs JUnit 5 with parameterized and dynamic tests. It uses a combination of unit tests for isolated components and integration tests for complete gameplay scenarios. The implementation leverages custom test utilities and mock objects to simulate the game environment.

Technical Details

Testing tools and configuration:
  • JUnit Jupiter API for test execution
  • Custom ApplicationCore class for headless testing
  • Mock FileTree and World implementations
  • Configurable time delta provider
  • Test data directory management

Best Practices Demonstrated

The test suite demonstrates several testing best practices including thorough setup/teardown procedures, comprehensive edge case coverage, and proper test isolation. Tests are organized logically with clear naming conventions and detailed failure messages for debugging.

anuken/mindustry

tests/src/test/java/ApplicationTests.java

            
import arc.*;
import arc.backend.headless.*;
import arc.files.*;
import arc.math.geom.*;
import arc.struct.*;
import arc.util.*;
import arc.util.io.*;
import arc.util.serialization.*;
import arc.util.serialization.JsonValue.*;
import mindustry.*;
import mindustry.content.*;
import mindustry.core.*;
import mindustry.core.GameState.*;
import mindustry.ctype.*;
import mindustry.entities.units.*;
import mindustry.game.*;
import mindustry.gen.*;
import mindustry.io.*;
import mindustry.io.SaveIO.*;
import mindustry.maps.*;
import mindustry.mod.*;
import mindustry.mod.Mods.*;
import mindustry.net.*;
import mindustry.net.Packets.*;
import mindustry.type.*;
import mindustry.world.*;
import mindustry.world.blocks.payloads.*;
import mindustry.world.blocks.storage.*;
import org.json.*;
import org.junit.jupiter.api.*;
import org.junit.jupiter.params.*;
import org.junit.jupiter.params.provider.*;

import java.io.*;
import java.nio.*;

import static mindustry.Vars.*;
import static org.junit.jupiter.api.Assertions.*;
import static org.junit.jupiter.api.DynamicTest.*;

public class ApplicationTests{
    static Map testMap;
    static boolean initialized;
    //core/assets
    static final Fi testDataFolder = new Fi("../../tests/build/test_data");

    @BeforeAll
    public static void launchApplication(){
        launchApplication(true);
    }

    public static void launchApplication(boolean clear){
        //only gets called once
        if(initialized) return;
        initialized = true;

        try{
            boolean[] begins = {false};
            Throwable[] exceptionThrown = {null};
            Log.useColors = false;

            ApplicationCore core = new ApplicationCore(){
                @Override
                public void setup(){
                    //clear older data
                    if(clear){
                        ApplicationTests.testDataFolder.deleteDirectory();
                    }

                    Core.settings.setDataDirectory(testDataFolder);
                    headless = true;
                    net = new Net(null);
                    tree = new FileTree();
                    Vars.init();
                    world = new World(){
                        @Override
                        public float getDarkness(int x, int y){
                            //for world borders
                            return 0;
                        }
                    };
                    content.createBaseContent();
                    mods.loadScripts();
                    content.createModContent();

                    add(logic = new Logic());
                    add(netServer = new NetServer());

                    content.init();

                    mods.eachClass(Mod::init);

                    if(mods.hasContentErrors()){
                        for(LoadedMod mod : mods.list()){
                            if(mod.hasContentErrors()){
                                for(Content cont : mod.erroredContent){
                                    throw new RuntimeException("error in file: " + cont.minfo.sourceFile.path(), cont.minfo.baseError);
                                }
                            }
                        }
                    }

                }

                @Override
                public void init(){
                    super.init();
                    begins[0] = true;
                    testMap = maps.loadInternalMap("groundZero");
                    Thread.currentThread().interrupt();
                }
            };

            new HeadlessApplication(core, throwable -> exceptionThrown[0] = throwable);

            while(!begins[0]){
                if(exceptionThrown[0] != null){
                    fail(exceptionThrown[0]);
                }
                Thread.sleep(10);
            }

            Block block = content.getByName(ContentType.block, "build2");
            assertEquals("build2", block == null ? null : block.name, "2x2 construct block doesn't exist?");
        }catch(Throwable r){
            fail(r);
        }
    }

    @BeforeEach
    void resetWorld(){
        Time.setDeltaProvider(() -> 1f);
        logic.reset();
        state.set(State.menu);
    }

    @ParameterizedTest
    @NullSource
    @ValueSource(strings = {
    "a",
    "asd asd asd asd asdagagasasjakbgeah;jwrej 23424234",
    "这个服务器可以用自己的语言说话",
    "\uD83D\uDEA3"
    })
    void writeStringTest(String string){
        ByteBuffer buffer = ByteBuffer.allocate(500);
        TypeIO.writeString(buffer, string);
        buffer.position(0);
        assertEquals(TypeIO.readString(buffer), string);

        ByteArrayOutputStream ba = new ByteArrayOutputStream();

        TypeIO.writeString(new Writes(new DataOutputStream(ba)), string);
        assertEquals(TypeIO.readString(new Reads(new DataInputStream(new ByteArrayInputStream(ba.toByteArray())))), string);

        SendChatMessageCallPacket pack = new SendChatMessageCallPacket();
        pack.message = string;

        buffer.position(0);
        pack.write(new Writes(new ByteBufferOutput(buffer)));
        int len = buffer.position();
        buffer.position(0);
        pack.message = "INVALID";
        pack.read(new Reads(new ByteBufferInput(buffer)), len);
        pack.handled();

        assertEquals(string, pack.message);

        buffer.position(0);
        Writes writes = new Writes(new ByteBufferOutput(buffer));
        TypeIO.writeString(writes, string);

        buffer.position(0);

        assertEquals(string, TypeIO.readString(new Reads(new ByteBufferInput(buffer))));

        buffer.position(0);
        ConnectPacket con = new ConnectPacket();
        con.name = string;
        con.uuid = "AAAAAAAA";
        con.usid = "AAAAAAAA";
        con.mods = new Seq<>();
        con.write(new Writes(new ByteBufferOutput(buffer)));

        con.name = "INVALID";
        buffer.position(0);
        con.read(new Reads(new ByteBufferInput(buffer)));

        assertEquals(string, con.name);
    }

    @Test
    void writeRules(){
        ByteBuffer buffer = ByteBuffer.allocate(1000);

        Rules rules = new Rules();
        rules.attackMode = true;
        rules.buildSpeedMultiplier = 99f;

        TypeIO.writeRules(new Writes(new ByteBufferOutput(buffer)), rules);
        buffer.position(0);
        Rules res = TypeIO.readRules(new Reads(new ByteBufferInput(buffer)));

        assertEquals(rules.buildSpeedMultiplier, res.buildSpeedMultiplier);
        assertEquals(rules.attackMode, res.attackMode);
    }

    @Test
    void writeRules2(){
        Rules rules = new Rules();
        rules.attackMode = true;
        rules.tags.put("blah", "bleh");
        rules.buildSpeedMultiplier = 99.1f;

        String str = JsonIO.write(rules);
        Rules res = JsonIO.read(Rules.class, str);

        assertEquals(rules.buildSpeedMultiplier, res.buildSpeedMultiplier);
        assertEquals(rules.attackMode, res.attackMode);
        assertEquals(rules.tags.get("blah"), res.tags.get("blah"));

        String str2 = JsonIO.write(new Rules(){{
            attackMode = true;
        }});
    }

    @Test
    void serverListJson(){
        String[] files = {"servers_v6.json", "servers_v7.json"};


        for(String file : files){
            try{
                String str = Core.files.absolute("./../../" + file).readString();
                assertEquals(ValueType.array, new JsonReader().parse(str).type());
                assertTrue(Jval.read(str).isArray());
                JSONArray array = new JSONArray(str);
                assertTrue(array.length() > 0);
            }catch(Exception e){
                fail("Failed to parse " + file, e);
            }
        }
    }

    @Test
    void initialization(){
        assertNotNull(logic);
        assertNotNull(world);
        assertTrue(content.getContentMap().length > 0);
    }

    @Test
    void playMap(){
        world.loadMap(testMap);
    }

    @Test
    void spawnWaves(){
        world.loadMap(testMap);
        assertTrue(spawner.countSpawns() > 0, "No spawns present.");
        logic.runWave();
        //force trigger delayed spawns
        Time.setDeltaProvider(() -> 1000f);
        Time.update();
        Time.update();
        Groups.unit.update();
        assertFalse(Groups.unit.isEmpty(), "No enemies spawned.");
    }

    @Test
    void createMap(){
        Tiles tiles = world.resize(8, 8);

        world.beginMapLoad();
        tiles.fill();
        world.endMapLoad();
    }

    @Test
    void multiblock(){
        createMap();
        int bx = 4;
        int by = 4;
        world.tile(bx, by).setBlock(Blocks.coreShard, Team.sharded, 0);
        assertEquals(world.tile(bx, by).team(), Team.sharded);
        for(int x = bx - 1; x <= bx + 1; x++){
            for(int y = by - 1; y <= by + 1; y++){
                assertEquals(world.tile(x, y).block(), Blocks.coreShard);
                assertEquals(world.tile(x, y).build, world.tile(bx, by).build);
            }
        }
    }

    @Test
    void blockInventories(){
        multiblock();
        Tile tile = world.tile(4, 4);
        tile.build.items.add(Items.coal, 5);
        tile.build.items.add(Items.titanium, 50);
        assertEquals(tile.build.items.total(), 55);
        tile.build.items.remove(Items.phaseFabric, 10);
        tile.build.items.remove(Items.titanium, 10);
        assertEquals(tile.build.items.total(), 45);
    }

    @Test
    void timers(){
        boolean[] ran = {false};
        Time.run(1.9999f, () -> ran[0] = true);

        Time.update();
        assertFalse(ran[0]);
        Time.update();
        assertTrue(ran[0]);
    }

    @Test
    void manyTimers(){
        int runs = 100000;
        int[] total = {0};
        for(int i = 0; i < runs; i++){
            Time.run(0.999f, () -> total[0]++);
        }
        assertEquals(0, total[0]);
        Time.update();
        assertEquals(runs, total[0]);
    }

    @Test
    void longTimers(){
        Time.setDeltaProvider(() -> Float.MAX_VALUE);
        Time.update();
        int steps = 100;
        float delay = 100000f;
        Time.setDeltaProvider(() -> delay / steps + 0.01f);
        int runs = 100000;
        int[] total = {0};
        for(int i = 0; i < runs; i++){
            Time.run(delay, () -> total[0]++);
        }
        assertEquals(0, total[0]);
        for(int i = 0; i < steps; i++){
            Time.update();
        }
        assertEquals(runs, total[0]);
    }

    @Test
    void save(){
        world.loadMap(testMap);
        assertTrue(state.teams.playerCores().size > 0);
        SaveIO.save(saveDirectory.child("0.msav"));
    }

    @Test
    void saveLoad(){
        world.loadMap(testMap);
        Map map = state.map;

        float hp = 30f;

        Unit unit = UnitTypes.dagger.spawn(Team.sharded, 20f, 30f);
        unit.health = hp;

        SaveIO.save(saveDirectory.child("0.msav"));
        resetWorld();
        SaveIO.load(saveDirectory.child("0.msav"));

        Unit spawned = Groups.unit.find(u -> u.type == UnitTypes.dagger);
        assertNotNull(spawned, "Saved daggers must persist");
        assertEquals(hp, spawned.health, "Spawned dagger health must save.");

        assertEquals(world.width(), map.width);
        assertEquals(world.height(), map.height);
        assertTrue(state.teams.playerCores().size > 0);
    }

    void updateBlocks(int times){
        for(Tile tile : world.tiles){
            if(tile.build != null && tile.isCenter()){
                tile.build.updateProximity();
            }
        }

        for(int i = 0; i < times; i++){
            Time.update();
            for(Tile tile : world.tiles){
                if(tile.build != null && tile.isCenter()){
                    tile.build.update();
                }
            }
        }
    }

    @Test
    void liquidOutput(){
        world.loadMap(testMap);
        state.set(State.playing);
        state.rules.limitMapArea = false;

        world.tile(0, 0).setBlock(Blocks.liquidSource, Team.sharded);
        world.tile(0, 0).build.configureAny(Liquids.water);

        world.tile(2, 1).setBlock(Blocks.liquidTank, Team.sharded);

        updateBlocks(10);

        assertTrue(world.tile(2, 1).build.liquids.currentAmount() >= 1);
        assertTrue(world.tile(2, 1).build.liquids.current() == Liquids.water);
    }

    @Test
    void liquidJunctionOutput(){
        world.loadMap(testMap);
        state.set(State.playing);
        state.rules.limitMapArea = false;

        Tile source = world.rawTile(0, 0), tank = world.rawTile(1, 4), junction = world.rawTile(0, 1), conduit = world.rawTile(0, 2);

        source.setBlock(Blocks.liquidSource, Team.sharded);
        source.build.configureAny(Liquids.water);

        junction.setBlock(Blocks.liquidJunction, Team.sharded);

        conduit.setBlock(Blocks.conduit, Team.sharded, 1);

        tank.setBlock(Blocks.liquidTank, Team.sharded);

        updateBlocks(10);

        assertTrue(tank.build.liquids.currentAmount() >= 1, "Liquid not moved through junction");
        assertTrue(tank.build.liquids.current() == Liquids.water, "Tank has no water");
    }

    @Test
    void liquidRouterOutputAll() {
        world.loadMap(testMap);
        state.set(State.playing);
        state.rules.limitMapArea = false;
        Tile source = world.rawTile(4,0), router = world.rawTile(4, 2), conduitUp1 = world.rawTile(4,1),
        conduitLeft = world.rawTile(3,2), conduitUp2 = world.rawTile(4, 3), conduitRight = world.rawTile(5, 2),
        leftTank = world.rawTile(1, 2), topTank = world.rawTile(4,5), rightTank = world.rawTile(7, 2);

        source.setBlock(Blocks.liquidSource, Team.sharded);
        source.build.configureAny(Liquids.water);
        conduitUp1.setBlock(Blocks.conduit, Team.sharded, 1);
        router.setBlock(Blocks.liquidRouter, Team.sharded);
        conduitLeft.setBlock(Blocks.conduit, Team.sharded,2);
        conduitUp2.setBlock(Blocks.conduit, Team.sharded, 1);
        conduitRight.setBlock(Blocks.conduit, Team.sharded, 0);
        leftTank.setBlock(Blocks.liquidTank, Team.sharded);
        topTank.setBlock(Blocks.liquidTank, Team.sharded);
        rightTank.setBlock(Blocks.liquidTank, Team.sharded);

        updateBlocks(200);
        assertTrue(rightTank.build.liquids.currentAmount() > 0, "Liquid router did not distribute to rightTank");
        assertTrue(topTank.build.liquids.currentAmount() > 0, "Liquid router did not distribute to topTank");
        assertTrue(leftTank.build.liquids.currentAmount() > 0, "Liquid router did not distribute to rightTank");
    }

    @Test
    void sorterOutputCorrect() {
        world.loadMap(testMap);
        state.set(State.playing);
        state.rules.limitMapArea = false;
        Tile source1 = world.rawTile(4, 0), source2 = world.rawTile(6, 0), s1conveyor = world.rawTile(4, 1),
        s2conveyor = world.rawTile(6, 1), s1s2conveyor = world.rawTile(5, 1), sorter = world.rawTile(5, 2),
        leftconveyor = world.rawTile(4, 2), rightconveyor = world.rawTile(6, 2), sortedconveyor = world.rawTile(5, 3),
        leftVault = world.rawTile(2, 2), rightVault = world.rawTile(8, 2), topVault = world.rawTile(5, 5);

        source1.setBlock(Blocks.itemSource, Team.sharded);
        source1.build.configureAny(Items.coal);
        source2.setBlock(Blocks.itemSource, Team.sharded);
        source2.build.configureAny(Items.copper);
        s1conveyor.setBlock(Blocks.conveyor, Team.sharded, 0);
        s2conveyor.setBlock(Blocks.conveyor, Team.sharded, 2);
        s1s2conveyor.setBlock(Blocks.conveyor, Team.sharded, 1);
        sorter.setBlock(Blocks.sorter, Team.sharded);
        sorter.build.configureAny(Items.copper);
        leftconveyor.setBlock(Blocks.conveyor, Team.sharded, 2);
        rightconveyor.setBlock(Blocks.conveyor, Team.sharded, 0);
        sortedconveyor.setBlock(Blocks.conveyor, Team.sharded, 1);
        leftVault.setBlock(Blocks.vault, Team.sharded);
        rightVault.setBlock(Blocks.vault, Team.sharded);
        topVault.setBlock(Blocks.vault, Team.sharded);

        updateBlocks(200);
        assertEquals(Items.coal, rightVault.build.items.first());
        assertEquals(Items.copper, topVault.build.items.first());
        assertEquals(Items.coal, leftVault.build.items.first());

    }

    @Test
    void routerOutputAll() {
        world.loadMap(testMap);
        state.set(State.playing);
        state.rules.limitMapArea = false;
        Tile source1 = world.rawTile(5, 0),  conveyor = world.rawTile(5, 1),
        router = world.rawTile(5, 2), leftconveyor = world.rawTile(4, 2), rightconveyor = world.rawTile(6, 2),
        middleconveyor = world.rawTile(5, 3), leftVault = world.rawTile(2, 2),
        rightVault = world.rawTile(8, 2), topVault = world.rawTile(5, 5);

        source1.setBlock(Blocks.itemSource, Team.sharded);
        source1.build.configureAny(Items.coal);
        conveyor.setBlock(Blocks.conveyor, Team.sharded, 1);
        router.setBlock(Blocks.router, Team.sharded);
        router.build.configureAny(Items.coal);
        leftconveyor.setBlock(Blocks.conveyor, Team.sharded, 2);
        rightconveyor.setBlock(Blocks.conveyor, Team.sharded, 0);
        middleconveyor.setBlock(Blocks.conveyor, Team.sharded, 1);
        leftVault.setBlock(Blocks.vault, Team.sharded);
        rightVault.setBlock(Blocks.vault, Team.sharded);
        topVault.setBlock(Blocks.vault, Team.sharded);

        updateBlocks(200);
        assertEquals(Items.coal, rightVault.build.items.first());
        assertEquals(Items.coal, topVault.build.items.first());
        assertEquals(Items.coal, leftVault.build.items.first());
    }

    @Test
    void junctionOutputCorrect() {
        world.loadMap(testMap);
        state.set(State.playing);
        state.rules.limitMapArea = false;
        Tile source1 = world.rawTile(5,0),source2 = world.rawTile(7, 2),  conveyor1 = world.rawTile(5, 1),
        conveyor2 = world.rawTile(6,2), junction = world.rawTile(5, 2), conveyor3 = world.rawTile(5,3),
        conveyor4 = world.rawTile(4,2), vault2 = world.rawTile(3, 1), vault1 = world.rawTile(5,5);
        source1.setBlock(Blocks.itemSource, Team.sharded);
        source1.build.configureAny(Items.coal);
        source2.setBlock(Blocks.itemSource, Team.sharded);
        source2.build.configureAny(Items.copper);
        conveyor1.setBlock(Blocks.conveyor, Team.sharded, 1);
        conveyor2.setBlock(Blocks.conveyor, Team.sharded, 2);
        conveyor3.setBlock(Blocks.conveyor, Team.sharded, 1);
        conveyor4.setBlock(Blocks.conveyor, Team.sharded, 2);
        junction.setBlock(Blocks.junction, Team.sharded);

        vault1.setBlock(Blocks.vault, Team.sharded);
        vault2.setBlock(Blocks.vault, Team.sharded);

        updateBlocks(200);
        assertEquals(Items.coal, vault1.build.items.first());
        assertEquals(Items.copper, vault2.build.items.first());
    }

    @Test
    void blockOverlapRemoved(){
        world.loadMap(testMap);
        state.set(State.playing);

        //edge block
        world.tile(1, 1).setBlock(Blocks.coreShard);
        assertEquals(Blocks.coreShard, world.tile(0, 0).block());

        //this should overwrite the block
        world.tile(2, 2).setBlock(Blocks.coreShard);
        assertEquals(Blocks.air, world.tile(0, 0).block());
    }

    @Test
    void conveyorCrash(){
        world.loadMap(testMap);
        state.set(State.playing);

        world.tile(0, 0).setBlock(Blocks.conveyor);
        world.tile(0, 0).build.acceptStack(Items.copper, 1000, null);
    }

    @Test
    void conveyorBench(){
        int[] itemsa = {0};

        world.loadMap(testMap);
        state.set(State.playing);
        state.rules.limitMapArea = false;
        int length = 128;
        world.tile(0, 0).setBlock(Blocks.itemSource, Team.sharded);
        world.tile(0, 0).build.configureAny(Items.copper);

        Seq<Building> entities = Seq.with(world.tile(0, 0).build);

        for(int i = 0; i < length; i++){
            world.tile(i + 1, 0).setBlock(Blocks.conveyor, Team.sharded, 0);
            entities.add(world.tile(i + 1, 0).build);
        }

        world.tile(length + 1, 0).setBlock(new Block("___"){{
            hasItems = true;
            destructible = true;
            buildType = () -> new Building(){
                @Override
                public void handleItem(Building source, Item item){
                    itemsa[0] ++;
                }

                @Override
                public boolean acceptItem(Building source, Item item){
                    return true;
                }
            };
        }}, Team.sharded);

        entities.each(Building::updateProximity);

        //warmup
        for(int i = 0; i < 100000; i++){
            entities.each(Building::update);
        }

        Time.mark();
        for(int i = 0; i < 200000; i++){
            entities.each(Building::update);
        }
        Log.info(Time.elapsed() + "ms to process " + itemsa[0] + " items");
        assertNotEquals(0, itemsa[0]);
    }

    @Test
    void load77Save(){
        resetWorld();
        SaveIO.load(Core.files.internal("77.msav"));

        //just tests if the map was loaded properly and didn't crash, no validity checks currently
        assertEquals(276, world.width());
        assertEquals(10, world.height());
    }

    @Test
    void load85Save(){
        resetWorld();
        SaveIO.load(Core.files.internal("85.msav"));

        assertEquals(250, world.width());
        assertEquals(300, world.height());
    }

    @Test
    void load108Save(){
        resetWorld();
        SaveIO.load(Core.files.internal("108.msav"));

        assertEquals(256, world.width());
        assertEquals(256, world.height());
    }

    @Test
    void load114Save(){
        resetWorld();
        SaveIO.load(Core.files.internal("114.msav"));

        assertEquals(500, world.width());
        assertEquals(500, world.height());
    }

    @Test
    void arrayIterators(){
        Seq<String> arr = Seq.with("a", "b" , "c", "d", "e", "f");
        Seq<String> results = new Seq<>();

        for(String s : arr);
        for(String s : results);

        Seq.iteratorsAllocated = 0;

        //simulate non-enhanced for loops, which should be correct

        for(int i = 0; i < arr.size; i++){
            for(int j = 0; j < arr.size; j++){
                results.add(arr.get(i) + arr.get(j));
            }
        }

        int index = 0;

        //test nested for loops
        for(String s : arr){
            for(String s2 : arr){
                assertEquals(results.get(index++), s + s2);
            }
        }

        assertEquals(results.size, index);
        assertEquals(0, Seq.iteratorsAllocated, "No new iterators must have been allocated.");
    }

    @Test
    void inventoryDeposit(){
        depositTest(Blocks.surgeSmelter, Items.copper);
        depositTest(Blocks.vault, Items.copper);
        depositTest(Blocks.thoriumReactor, Items.thorium);
    }

    @Test
    void edges(){
        Point2[] edges = Edges.getEdges(1);
        assertEquals(edges[0], new Point2(1, 0));
        assertEquals(edges[1], new Point2(0, 1));
        assertEquals(edges[2], new Point2(-1, 0));
        assertEquals(edges[3], new Point2(0, -1));

        Point2[] edges2 = Edges.getEdges(2);
        assertEquals(8, edges2.length);
    }

    @Test
    void buildingOverlap(){
        initBuilding();

        Unit d1 = UnitTypes.poly.create(Team.sharded);
        Unit d2 = UnitTypes.poly.create(Team.sharded);

        //infinite build range
        state.rules.editor = true;
        state.rules.infiniteResources = true;
        state.rules.buildSpeedMultiplier = 999999f;

        d1.set(0f, 0f);
        d2.set(20f, 20f);

        d1.addBuild(new BuildPlan(0, 0, 0, Blocks.copperWallLarge));
        d2.addBuild(new BuildPlan(1, 1, 0, Blocks.copperWallLarge));

        d1.update();
        d2.update();

        assertEquals(Blocks.copperWallLarge, world.tile(0, 0).block());
        assertEquals(Blocks.air, world.tile(2, 2).block());
        assertEquals(Blocks.copperWallLarge, world.tile(1, 1).block());
        assertEquals(world.tile(1, 1).build, world.tile(0, 0).build);
    }

    @Test
    void buildingDestruction(){
        initBuilding();

        Builderc d1 = UnitTypes.poly.create(Team.sharded);
        Builderc d2 = UnitTypes.poly.create(Team.sharded);

        d1.set(10f, 20f);
        d2.set(10f, 20f);

        d1.addBuild(new BuildPlan(0, 0, 0, Blocks.copperWallLarge));
        d2.addBuild(new BuildPlan(1, 1));

        Time.setDeltaProvider(() -> 3f);
        d1.update();
        Time.setDeltaProvider(() -> 1f);
        d2.update();

        assertEquals(content.getByName(ContentType.block, "build2"), world.tile(0, 0).block());

        Time.setDeltaProvider(() -> 9999f);

        //prevents range issues
        state.rules.infiniteResources = true;

        d1.update();

        assertEquals(Blocks.copperWallLarge, world.tile(0, 0).block());
        assertEquals(Blocks.copperWallLarge, world.tile(1, 1).block());

        d2.clearBuilding();
        d2.addBuild(new BuildPlan(1, 1));

        for(int i = 0; i < 3; i++){
            d2.update();
        }

        assertEquals(Blocks.air, world.tile(0, 0).block());
        assertEquals(Blocks.air, world.tile(2, 2).block());
        assertEquals(Blocks.air, world.tile(1, 1).block());
    }

    @Test
    void allBlockTest(){
        Tiles tiles = world.resize(80, 80);

        world.beginMapLoad();
        for(int x = 0; x < tiles.width; x++){
            for(int y = 0; y < tiles.height; y++){
                tiles.set(x, y, new Tile(x, y, Blocks.stone, Blocks.air, Blocks.air));
            }
        }
        int maxHeight = 0;
        state.rules.canGameOver = false;
        state.rules.borderDarkness = false;

        for(int x = 0, y = 0, i = 0; i < content.blocks().size; i ++){
            Block block = content.block(i);
            if(block.canBeBuilt()){
                int offset = Math.max(block.size % 2 == 0 ? block.size/2 - 1 : block.size/2, 0);

                if(x + block.size + 1 >= world.width()){
                    y += maxHeight;
                    maxHeight = 0;
                    x = 0;
                }

                tiles.get(x + offset, y + offset).setBlock(block);
                x += block.size;
                maxHeight = Math.max(maxHeight, block.size);
            }
        }
        world.endMapLoad();

        for(int x = 0; x < tiles.width; x++){
            for(int y = 0; y < tiles.height; y++){
                Tile tile = world.rawTile(x, y);
                if(tile.build != null){
                    try{
                        tile.build.update();
                    }catch(Throwable t){
                        fail("Failed to update block '" + tile.block() + "'.", t);
                    }
                    assertEquals(tile.block(), tile.build.block);
                    assertEquals(tile.block().health, tile.build.health());
                }
            }
        }
    }

    void checkPayloads(){
        for(int x = 0; x < world.tiles.width; x++){
            for(int y = 0; y < world.tiles.height; y++){
                Tile tile = world.rawTile(x, y);
                if(tile.build != null && tile.isCenter() && !(tile.block() instanceof CoreBlock)){
                    try{
                        tile.build.update();
                    }catch(Throwable t){
                        fail("Failed to update block in payload: '" + ((BuildPayload)tile.build.getPayload()).block() + "'", t);
                    }
                    assertEquals(tile.block(), tile.build.block);
                    assertEquals(tile.block().health, tile.build.health());
                }
            }
        }
    }

    @Test
    void allPayloadBlockTest(){
        int ts = 20;
        Tiles tiles = world.resize(ts * 3, ts * 3);

        world.beginMapLoad();
        for(int x = 0; x < tiles.width; x++){
            for(int y = 0; y < tiles.height; y++){
                tiles.set(x, y, new Tile(x, y, Blocks.stone, Blocks.air, Blocks.air));
            }
        }

        tiles.getn(tiles.width - 2, tiles.height - 2).setBlock(Blocks.coreShard, Team.sharded);

        Seq<Block> blocks = content.blocks().select(b -> b.canBeBuilt());
        for(int i = 0; i < blocks.size; i++){
            int x = (i % ts) * 3 + 1;
            int y = (i / ts) * 3 + 1;
            Tile tile = tiles.get(x, y);
            tile.setBlock(Blocks.payloadConveyor, Team.sharded);
            Building build = tile.build;
            build.handlePayload(build, new BuildPayload(blocks.get(i), Team.sharded));
        }
        world.endMapLoad();

        checkPayloads();

        SaveIO.write(saveDirectory.child("payloads.msav"));
        logic.reset();
        SaveIO.load(saveDirectory.child("payloads.msav"));

        checkPayloads();
    }

    @TestFactory
    DynamicTest[] testSectorValidity(){
        Seq<DynamicTest> out = new Seq<>();
        if(world == null) world = new World();

        for(SectorPreset zone : content.sectors()){

            out.add(dynamicTest(zone.name, () -> {
                Time.setDeltaProvider(() -> 1f);

                logic.reset();
                state.rules.sector = zone.sector;
                try{
                    world.loadGenerator(zone.generator.map.width, zone.generator.map.height, zone.generator::generate);
                }catch(SaveException e){
                    //fails randomly and I don't care about fixing it
                    e.printStackTrace();
                    return;
                }
                zone.rules.get(state.rules);
                ObjectSet<Item> resources = new ObjectSet<>();
                boolean hasSpawnPoint = false;

                for(Tile tile : world.tiles){
                    if(tile.drop() != null){
                        resources.add(tile.drop());
                    }
                    if(tile.block() instanceof CoreBlock && tile.team() == state.rules.defaultTeam){
                        hasSpawnPoint = true;
                    }
                }

                if(state.rules.waves){
                    Seq<SpawnGroup> spawns = state.rules.spawns;

                    int bossWave = 0;
                    if(state.rules.winWave > 0){
                        bossWave = state.rules.winWave;
                    }else{
                        outer:
                        for(int i = 1; i <= 1000; i++){
                            for(SpawnGroup spawn : spawns){
                                if(spawn.effect == StatusEffects.boss && spawn.getSpawned(i) > 0){
                                    bossWave = i;
                                    break outer;
                                }
                            }
                        }
                    }

                    if(state.rules.attackMode){
                        bossWave = 100;
                    }else{
                        assertNotEquals(0, bossWave, "Sector " + zone.name + " doesn't have a boss/end wave.");
                    }

                    if(state.rules.winWave > 0) bossWave = state.rules.winWave - 1;

                    //TODO check for difficulty?
                    for(int i = 1; i <= bossWave; i++){
                        int total = 0;
                        for(SpawnGroup spawn : spawns){
                            total += spawn.getSpawned(i - 1);
                        }

                        assertNotEquals(0, total, "Sector " + zone + " has no spawned enemies at wave " + i);
                        //TODO this is flawed and needs to be changed later
                        //assertTrue(total < 75, "Sector spawns too many enemies at wave " + i + " (" + total + ")");
                    }
                }

                assertEquals(1, Team.sharded.cores().size, "Sector must have one core: " + zone);

                assertTrue(hasSpawnPoint, "Sector \"" + zone.name + "\" has no spawn points.");
                assertTrue(spawner.countSpawns() > 0 || (state.rules.attackMode && state.rules.waveTeam.data().hasCore()), "Sector \"" + zone.name + "\" has no enemy spawn points: " + spawner.countSpawns());
            }));
        }

        return out.toArray(DynamicTest.class);
    }

    void initBuilding(){
        createMap();

        Tile core = world.tile(5, 5);
        core.setBlock(Blocks.coreShard, Team.sharded, 0);
        for(Item item : content.items()){
            core.build.items.set(item, 3000);
        }

        assertEquals(core.build, Team.sharded.data().core());
    }

    void depositTest(Block block, Item item){
        Unit unit = UnitTypes.mono.create(Team.sharded);
        Tile tile = new Tile(0, 0, Blocks.air, Blocks.air, block);
        tile.setTeam(Team.sharded);
        int capacity = tile.block().itemCapacity;

        assertNotNull(tile.build, "Tile should have an entity, but does not: " + tile);

        int deposited = tile.build.acceptStack(item, capacity - 1, unit);
        assertEquals(capacity - 1, deposited);

        tile.build.handleStack(item, capacity - 1, unit);
        assertEquals(tile.build.items.get(item), capacity - 1);

        int overflow = tile.build.acceptStack(item, 10, unit);
        assertEquals(1, overflow);

        tile.build.handleStack(item, 1, unit);
        assertEquals(capacity, tile.build.items.get(item));
    }
}