Release God's Eye View as open source

src/data/cctvProxy.test.mjs

@@ -0,0 +1,38 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import {
+  CCTV_FRAME_FETCH_TIMEOUT_MS,
+  fetchCctvImageFromUpstream,
+} from '../../vite.config.js';
+
+test('CCTV upstream frame fetch supplies a bounded abort signal', async () => {
+  let observedSignal = null;
+  const startedAt = Date.now();
+  const result = await fetchCctvImageFromUpstream('https://example.com/frame.jpg', {
+    timeoutMs: 20,
+    fetchImpl: (_url, options) => new Promise((_resolve, reject) => {
+      observedSignal = options.signal;
+      options.signal.addEventListener('abort', () => reject(options.signal.reason), { once: true });
+    }),
+  });
+
+  assert.equal(result, null);
+  assert.ok(observedSignal instanceof AbortSignal);
+  assert.equal(observedSignal.aborted, true);
+  assert.ok(Date.now() - startedAt < 500, 'test timeout should settle promptly');
+  assert.ok(CCTV_FRAME_FETCH_TIMEOUT_MS < 10_000, 'production timeout must beat the active refresh cadence');
+});
+
+test('CCTV upstream frame fetch returns a valid image response', async () => {
+  const result = await fetchCctvImageFromUpstream('https://example.com/frame.jpg', {
+    timeoutMs: 100,
+    fetchImpl: async () => new Response(Uint8Array.from([1, 2, 3]), {
+      status: 200,
+      headers: { 'Content-Type': 'image/jpeg' },
+    }),
+  });
+
+  assert.equal(result?.ok, true);
+  assert.equal(result?.contentType, 'image/jpeg');
+  assert.deepEqual(result?.body, Buffer.from([1, 2, 3]));
+});