perf: diagnoistics improvements

electron/diagnostics/high-memory-alert.store.spec.ts

@@ -0,0 +1,64 @@
+import * as fsp from 'fs/promises';
+import * as os from 'os';
+import * as path from 'path';
+import {
+  afterEach,
+  describe,
+  expect,
+  it
+} from 'vitest';
+import {
+  clearHighMemoryAlert,
+  readHighMemoryAlert,
+  resolveHighMemoryAlertPath,
+  writeHighMemoryAlert
+} from './high-memory-alert.store';
+
+describe('high-memory-alert.store', () => {
+  const tempDirs: string[] = [];
+
+  afterEach(async () => {
+    await Promise.all(tempDirs.splice(0).map((dir) => fsp.rm(dir, {
+      recursive: true,
+      force: true
+    })));
+  });
+
+  it('writes and reads a pending startup alert record', async () => {
+    const userDataPath = await fsp.mkdtemp(path.join(os.tmpdir(), 'metoyou-high-memory-'));
+
+    tempDirs.push(userDataPath);
+
+    const record = {
+      logFilePath: path.join(userDataPath, 'diagnostics', 'perf-session.jsonl'),
+      detectedAt: 1_700_000_000_000,
+      peakWorkingSetKb: 2_200_000,
+      sessionId: 'session-1'
+    };
+
+    await writeHighMemoryAlert(userDataPath, record);
+
+    expect(resolveHighMemoryAlertPath(userDataPath)).toBe(
+      path.join(userDataPath, 'diagnostics', 'high-memory-pending.json')
+    );
+
+    expect(await readHighMemoryAlert(userDataPath)).toEqual(record);
+  });
+
+  it('clears the pending startup alert record', async () => {
+    const userDataPath = await fsp.mkdtemp(path.join(os.tmpdir(), 'metoyou-high-memory-'));
+
+    tempDirs.push(userDataPath);
+
+    await writeHighMemoryAlert(userDataPath, {
+      logFilePath: '/tmp/perf.jsonl',
+      detectedAt: Date.now(),
+      peakWorkingSetKb: 2_100_000,
+      sessionId: 'session-2'
+    });
+
+    await clearHighMemoryAlert(userDataPath);
+
+    expect(await readHighMemoryAlert(userDataPath)).toBeNull();
+  });
+});