fix: retarget updater to @mosaic/mosaic

packages/mosaic/__tests__/update-checker.test.ts

@@ -1,7 +1,20 @@
-import { describe, expect, it } from 'vitest';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { semverLt, formatUpdateNotice } from '../src/runtime/update-checker.js';
 import type { UpdateCheckResult } from '../src/runtime/update-checker.js';
 
+const { execSyncMock } = vi.hoisted(() => ({
+  execSyncMock: vi.fn(),
+}));
+
+vi.mock('node:child_process', () => ({
+  execSync: execSyncMock,
+}));
+
+async function importUpdateChecker() {
+  vi.resetModules();
+  return import('../src/runtime/update-checker.js');
+}
+
 describe('semverLt', () => {
   it('returns true when a < b', () => {
     expect(semverLt('0.0.1', '0.0.2')).toBe(true);
@@ -25,6 +38,10 @@ describe('semverLt', () => {
 });
 
 describe('formatUpdateNotice', () => {
+  beforeEach(() => {
+    execSyncMock.mockReset();
+  });
+
   it('returns empty string when up to date', () => {
     const result: UpdateCheckResult = {
       current: '1.0.0',
@@ -49,4 +66,62 @@ describe('formatUpdateNotice', () => {
     expect(notice).toContain('0.1.0');
     expect(notice).toContain('Update available');
   });
+
+  it('uses @mosaic/mosaic hints for modern installs', async () => {
+    execSyncMock.mockImplementation((command: string) => {
+      if (command.includes('ls -g --depth=0 --json')) {
+        return JSON.stringify({
+          dependencies: {
+            '@mosaic/mosaic': { version: '0.0.17' },
+            '@mosaic/cli': { version: '0.0.16' },
+          },
+        });
+      }
+
+      if (command.includes('view @mosaic/mosaic version')) {
+        return '0.0.18';
+      }
+
+      throw new Error(`Unexpected command: ${command}`);
+    });
+
+    const { checkForUpdate } = await importUpdateChecker();
+    const result = checkForUpdate({ skipCache: true });
+    const notice = formatUpdateNotice(result);
+
+    expect(result.current).toBe('0.0.17');
+    expect(result.latest).toBe('0.0.18');
+    expect(notice).toContain('@mosaic/mosaic@latest');
+    expect(notice).not.toContain('@mosaic/cli@latest');
+  });
+
+  it('falls back to @mosaic/mosaic for legacy @mosaic/cli installs when cli is unavailable', async () => {
+    execSyncMock.mockImplementation((command: string) => {
+      if (command.includes('ls -g --depth=0 --json')) {
+        return JSON.stringify({
+          dependencies: {
+            '@mosaic/cli': { version: '0.0.16' },
+          },
+        });
+      }
+
+      if (command.includes('view @mosaic/cli version')) {
+        throw new Error('not found');
+      }
+
+      if (command.includes('view @mosaic/mosaic version')) {
+        return '0.0.17';
+      }
+
+      throw new Error(`Unexpected command: ${command}`);
+    });
+
+    const { checkForUpdate } = await importUpdateChecker();
+    const result = checkForUpdate({ skipCache: true });
+    const notice = formatUpdateNotice(result);
+
+    expect(result.current).toBe('0.0.16');
+    expect(result.latest).toBe('0.0.17');
+    expect(notice).toContain('@mosaic/mosaic@latest');
+  });
 });