test(08-10): cover data-system/data-state gap codes and add loader tests

- eventDispatch: assert codes 171 (missing event id) and 172 (non-boolean reduce result)

- path/system: assert code 182 when binding a foreign CoreState layer

- data-state event: assert code 1001 for an unknown setBlock tile

- loader: new loader.test.ts covering PrefixedJSONCProcessor 66/67, DefaultDataLoaderHook 69/success, and MotaDataLoader public surface (66/67/68/69; 68 recorded unreachable)

packages-user/data-state/src/event/__test__/event.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect, it, vi } from 'vitest';
 import { readFileSync } from 'node:fs';
 import { WebLoadStarter } from '@motajs/loader';
+import { logger } from '@motajs/common';
 import { Statement, StatementType } from '@motajs/anon-tokyo';
 import {
     FaceDirection,
@@ -155,6 +156,20 @@ describe('event built-ins', () => {
         expect(fixture.layer.getBlock(1, 0)).toBe(2);
     });
 
+    // 验证 setBlock 遇到未注册图块时告警码 1001 并跳过
+    it('warns code 1001 when setBlock receives an unknown tile', async () => {
+        const fixture = createFixture();
+        const warn = vi.spyOn(logger, 'warn');
+
+        await invokeBuiltin(
+            getRegistration('setBlock'),
+            { x: 1, y: 0, tile: 'missing' },
+            fixture.env
+        );
+
+        expect(warn).toHaveBeenCalledWith(1001);
+    });
+
     // 验证真实注册项移动动态图块并按 safe 分支还原
     it('moves a dynamic block and respects safe static transfer', async () => {
         const fixture = createFixture();

packages-user/data-state/src/loader/__test__/loader.test.ts

@@ -0,0 +1,176 @@
+// 测试 data-state loader：PrefixedJSONCProcessor 解析、DefaultDataLoaderHook 核心配置守卫与 MotaDataLoader 公开面
+import { describe, expect, it, vi } from 'vitest';
+import { ILoadTask, LoadDataType } from '@motajs/loader';
+import { logger } from '@motajs/common';
+import { PrefixedJSONCProcessor } from '../jsoncProcessor';
+import { DefaultDataLoaderHook } from '../hook';
+import { MotaDataLoader } from '../loader';
+
+/** 与生产 loader 一致的 jsonc 前缀分隔串 */
+const PREFIX = '// --- SYSTEM PREFIX END --- //';
+
+/** 构造一个仅暴露 url 的最小加载任务桩 */
+function createTaskStub(url: string): ILoadTask<LoadDataType.Text, unknown> {
+    return { url } as never;
+}
+
+/** 构造一个按任务 url 返回带前缀 JSON 的加载启动器桩 */
+function createStarter() {
+    return {
+        async start(request: { url: string }) {
+            const identifier = request.url.split('/').pop();
+            return {
+                url: request.url,
+                body: null,
+                headers: { get: () => null },
+                arrayBuffer: async () => new ArrayBuffer(0),
+                blob: async () => new Blob(),
+                bytes: async () => new Uint8Array(),
+                json: async () => ({}),
+                text: async () => `${PREFIX}${JSON.stringify({ identifier })}`
+            };
+        }
+    };
+}
+
+/** 构造一个按需迭代任务 start() 的加载管理器桩 */
+function createManager() {
+    const tasks: ILoadTask[] = [];
+    return {
+        addTask(task: ILoadTask): void {
+            tasks.push(task);
+        },
+        async *load(): AsyncIterable<number> {
+            for (const task of [...tasks]) {
+                for await (const loaded of task.start()) {
+                    yield loaded;
+                }
+            }
+        }
+    };
+}
+
+describe('PrefixedJSONCProcessor', () => {
+    // 验证携带合法前缀的响应会被解析为对象
+    it('parses the payload after the prefix split', async () => {
+        const processor = new PrefixedJSONCProcessor<{ a: number }>(PREFIX);
+
+        await expect(
+            processor.process(`${PREFIX}{"a":1}`, createTaskStub('x'))
+        ).resolves.toEqual({ a: 1 });
+    });
+
+    // 验证响应缺少前缀分隔串时告警码 66 并返回空对象
+    it('warns code 66 when the prefix split string is missing', () => {
+        const processor = new PrefixedJSONCProcessor<unknown>(PREFIX);
+        const result = logger.catch(() =>
+            processor.process('no prefix at all', createTaskStub('core.jsonc'))
+        );
+
+        expect(result.info.map(info => info.code)).toContain(66);
+    });
+
+    // 验证前缀后的 JSON 无法解析时告警码 67 并返回空对象
+    it('warns code 67 when the split payload is not valid json', () => {
+        const processor = new PrefixedJSONCProcessor<unknown>(PREFIX);
+        const result = logger.catch(() =>
+            processor.process(
+                `${PREFIX}{not json`,
+                createTaskStub('core.jsonc')
+            )
+        );
+
+        expect(result.info.map(info => info.code)).toContain(67);
+    });
+});
+
+describe('DefaultDataLoaderHook', () => {
+    // 验证核心配置缺失时告警码 69 且不追加任何额外配置
+    it('warns code 69 when the core config is missing', async () => {
+        const hook = new DefaultDataLoaderHook();
+        const loader = { getConfig: () => null } as never;
+        const result = logger.catch(() => hook.onCoreConfigLoaded(loader));
+
+        await expect(result.ret).resolves.toBeUndefined();
+        expect(result.info.map(info => info.code)).toContain(69);
+    });
+
+    // 验证核心配置存在时按目录与默认值追加全部额外配置
+    it('adds every extra config declared by the core config', async () => {
+        const hook = new DefaultDataLoaderHook();
+        const addExtraConfig = vi.fn();
+        const coreConfig = {
+            content: {
+                enemyDir: 'enemy',
+                itemDir: 'item',
+                mapListDir: 'map-list',
+                tileDir: 'tile',
+                defaults: {
+                    enemyDefault: 'enemy-default',
+                    itemDefault: 'item-default',
+                    mapDefault: 'map-default',
+                    tileDefault: 'tile-default'
+                }
+            }
+        };
+        const loader = {
+            getConfig: (id: string) => (id === 'core' ? coreConfig : null),
+            addExtraConfig
+        } as never;
+
+        await hook.onCoreConfigLoaded(loader);
+
+        expect(addExtraConfig).toHaveBeenCalledWith('enemy', 'enemy');
+        expect(addExtraConfig).toHaveBeenCalledWith('item', 'item');
+        expect(addExtraConfig).toHaveBeenCalledWith('map-list', 'map-list');
+        expect(addExtraConfig).toHaveBeenCalledWith('tile', 'tile');
+        expect(addExtraConfig).toHaveBeenCalledWith(
+            'enemy-default',
+            'enemy-default'
+        );
+        expect(addExtraConfig).toHaveBeenCalledWith(
+            'item-default',
+            'item-default'
+        );
+        expect(addExtraConfig).toHaveBeenCalledWith(
+            'map-default',
+            'map-default'
+        );
+        expect(addExtraConfig).toHaveBeenCalledWith(
+            'tile-default',
+            'tile-default'
+        );
+    });
+});
+
+describe('MotaDataLoader', () => {
+    // 验证加载器依次加载核心与额外配置、兑现 loaded 并暴露已加载配置
+    it('loads core and extra configs, exposes them and resolves loaded', async () => {
+        const loader = new MotaDataLoader(
+            createManager() as never,
+            createStarter() as never
+        );
+        const coreHook = vi.fn(async () => {});
+        const extraHook = vi.fn(async () => {});
+        loader.addHook({
+            onCoreConfigLoaded: coreHook,
+            onExtraConfigLoaded: extraHook
+        });
+        loader.addCoreConfig('core', 'core.jsonc');
+        loader.addExtraConfig('enemy', 'enemy.jsonc');
+        loader.addExtraConfig('item', 'item.jsonc');
+
+        for await (const loaded of loader.start()) {
+            expect(typeof loaded).toBe('number');
+        }
+        await loader.loaded();
+
+        expect(coreHook).toHaveBeenCalledWith(loader);
+        expect(extraHook).toHaveBeenCalledWith(loader);
+        expect(loader.getConfig('enemy')).toEqual({
+            identifier: 'enemy.jsonc'
+        });
+        expect(loader.getConfig('item')).toEqual({ identifier: 'item.jsonc' });
+        expect(loader.getConfig('missing')).toBeNull();
+    });
+});