test(telegram): pin that the route uses the service's shape answer, and name the hex arm honestly (TASK-159 follow-up)

backend/__tests__/unit/routes/telegram.webhook.connectCode.test.js

@@ -200,6 +200,19 @@ describe('/commonly-enable hardening', () => {
     expect(isConnectCodeShape).toHaveBeenCalledWith(JOINED_CODE);
   });
 
+  // vera 74641: the arm above pins WHERE the answer comes from, not that the
+  // answer is USED. A belt-and-braces drift -- ask the service and then also
+  // apply a local regex -- would keep every arm green. Admitting a malformed
+  // code through the service must therefore let the lookup proceed: if the
+  // route re-checks the code itself, this refuses instead and reddens.
+  it('lets the service answer decide, rather than re-checking the code itself', async () => {
+    Integration.findOne = jest.fn().mockResolvedValue(null);
+    isConnectCodeShape.mockReturnValueOnce(true);
+    await enable('not-a-connect-code');
+    expect(registerEnableAttempt).toHaveBeenCalledTimes(1);
+    expect(Integration.findOne).toHaveBeenCalledTimes(1);
+  });
+
   it.each(['1964', 'abc123', `${JOINED_CODE}a`, JOINED_CODE.slice(0, 31)])(
     'spends no attempt on the malformed code %s',
     async (input) => {

backend/__tests__/unit/services/telegramConnectCode.test.js

@@ -34,8 +34,16 @@ describe('telegramConnectCode', () => {
       expect(isConnectCodeShape(connectCode.toUpperCase())).toBe(false);
     });
 
-    it('draws its width from the same constant as the minter', () => {
-      expect(mintConnectCode().connectCode).toHaveLength(CONNECT_CODE_BYTES * 2);
+    // vera 74641: the title this arm used to carry ("draws its width from the
+    // same constant as the minter") claimed a derivation it cannot witness --
+    // hex of N bytes is 2N characters whatever the constant is, so it survived
+    // every constant mutation. The derivation is carried by `accepts what the
+    // minter produces`; what this arm pins is that the code is HEX, which is
+    // why its width tracks the byte count.
+    it('mints hex, so the code is twice CONNECT_CODE_BYTES wide', () => {
+      const { connectCode } = mintConnectCode();
+      expect(connectCode).toMatch(/^[0-9a-f]+$/);
+      expect(connectCode).toHaveLength(CONNECT_CODE_BYTES * 2);
     });
   });