Fix standalone TTR preview route without saved match ID

backend/tests/ttrPreviewController.node.test.mjs

@@ -0,0 +1,39 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import vm from 'node:vm';
+
+const source = readFileSync(new URL('../controllers/matchController.js', import.meta.url), 'utf8')
+    .replace(/^import .*;\n/gm, '')
+    .replace(/^export const /gm, 'const ');
+
+test('the literal standalone route resolves players without a match lookup or cache mutation', async () => {
+    const calls = [];
+    const context = vm.createContext({
+        console,
+        Op: { ne: Symbol('ne') },
+        Match: { findByPk() { throw new Error('Standalone must not look up a saved match'); } },
+        sequelize: { query() { throw new Error('Standalone must not access the match cache'); } },
+        Member: { findAll: async () => [] },
+        Club: { findAll: async () => [] },
+        checkAccess: async (_token, clubId) => { assert.equal(clubId, 7); },
+        myTischtennisService: {}, myTischtennisClient: {},
+        resolveTtrPreview: async input => {
+            calls.push(input);
+            return { players: [{ side: 'home', name: 'Anna Wolf', ttr: 680 }], diagnostics: [] };
+        },
+    });
+    vm.runInContext(source + '\nglobalThis.standaloneHandler = getStandaloneTtrPreviewPlayers;', context);
+    const req = { params: {}, headers: { authcode: 'test-token' }, body: {
+        clubId: 7, homePlayers: [{ firstname: 'Anna', lastname: 'Wolf' }],
+    }, user: { id: 3 } };
+    let payload;
+    const res = {
+        status(code) { assert.fail(`Unexpected HTTP ${code}`); },
+        json(body) { payload = body; },
+    };
+    await context.standaloneHandler(req, res);
+    assert.equal(calls.length, 1);
+    assert.equal(calls[0].homePlayers[0].firstname, 'Anna');
+    assert.equal(payload.players[0].ttr, 680);
+});