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tests/reproxy/minecraft.test.cjs

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+const assert = require('node:assert/strict');
+const { readFileSync } = require('node:fs');
+const { resolve } = require('node:path');
+const { test } = require('node:test');
+const { runInNewContext } = require('node:vm');
+
+const root = resolve(__dirname, '../../');
+const source = readFileSync(resolve(root, 'reproxy/web/minecraft/app.js'), 'utf8');
+
+async function renderStatus(response, error) {
+    const elements = Object.fromEntries(['server-status', 'build-status', 'build-download'].map(id => [id, {}]));
+    const requests = [];
+    let refresh;
+    const context = {
+        document: { getElementById: id => elements[id] },
+        AbortSignal,
+        TextDecoder,
+        Uint8Array,
+        atob,
+        fetch: async (url, options) => {
+            requests.push({ url, options });
+            if (url.endsWith('/readme')) {
+                return { ok: true, json: async () => ({ encoding: 'base64', content: Buffer.from('Актуальная версия — **1.2.3**: [Скачать 1.2.3](dist/minecraft-lab-neoforge-spike-1.2.3/minecraft-lab-neoforge-spike-1.2.3.mrpack)').toString('base64') }) };
+            }
+            if (error) throw error;
+            return response;
+        },
+        setInterval: (callback, delay) => { refresh = { callback, delay }; },
+    };
+    runInNewContext(source, context);
+    await new Promise(setImmediate);
+    assert.equal(elements['build-download'].hidden, false);
+    assert.match(elements['build-download'].href, /1\.2\.3\.mrpack$/);
+    assert.equal(refresh.delay, 300000);
+    await refresh.callback();
+    assert.equal(requests.filter(request => request.url === '/minecraft/api/status').length, 2);
+    assert.ok(requests.every(request => request.options.signal instanceof AbortSignal));
+    return elements['server-status'].textContent;
+}
+
+for (const [name, data, expected] of [
+    ['positive count', { online: true, players: { online: 7 } }, 'Игроков онлайн: 7'],
+    ['zero count', { online: true, players: { online: 0 } }, 'Игроков онлайн: 0'],
+    ['offline', { online: false }, 'Сервер недоступен'],
+    ...[null, {}, { online: true }, { online: true, players: { online: -1 } }, { online: true, players: { online: '2' } }].map(data => ['invalid response ' + JSON.stringify(data), data, 'Не удалось получить онлайн']),
+]) {
+    test(name, async () => assert.equal(await renderStatus({ ok: true, json: async () => data }), expected));
+}
+
+test('HTTP failure', async () => assert.equal(await renderStatus({ ok: false }), 'Не удалось получить онлайн'));
+test('invalid JSON', async () => assert.equal(await renderStatus({ ok: true, json: async () => { throw new SyntaxError(); } }), 'Не удалось получить онлайн'));
+test('timeout', async () => assert.equal(await renderStatus(null, new DOMException('Timeout', 'TimeoutError')), 'Не удалось получить онлайн'));
+test('network failure', async () => assert.equal(await renderStatus(null, new TypeError('Failed to fetch')), 'Не удалось получить онлайн'));
+
+test('Telemost link and initial status', () => {
+    const html = readFileSync(resolve(root, 'reproxy/web/minecraft/index.html'), 'utf8');
+    assert.match(html, /href="https:\/\/telemost\.yandex\.ru\/j\/76726739040099\?skip_app=1" target="_blank" rel="noopener noreferrer"/);
+    assert.match(html, /id="server-status" role="status">Проверяем онлайн…/);
+});