Refactor VPN proxy client implementation

test/server/subscription.test.js

@@ -4,7 +4,7 @@ import test from 'node:test';
 import {
   parseSubscriptionBody,
   selectRefreshedServer,
-} from '../../src/server/subscription.js';
+} from '../../dist/server/subscription.js';
 
 const parse = (outbounds) => parseSubscriptionBody(JSON.stringify({ outbounds }));
 const outbound = (tag, server, server_port = 443) => ({
@@ -76,3 +76,13 @@ test('provider placeholders never become selectable servers', () => {
   assert.deepEqual(parsed.servers.map((server) => server.label), ['Amsterdam']);
   assert.equal(parsed.config.outbounds.length, 1);
 });
+
+test('subscription parser rejects JSON primitives and arrays', () => {
+  for (const value of [null, [], 42, true, 'provider rejected']) {
+    assert.throws(
+      () => parseSubscriptionBody(JSON.stringify(value)),
+      (error) => error.code === 'SUBSCRIPTION_INVALID',
+      `expected ${JSON.stringify(value)} to be rejected`,
+    );
+  }
+});