test(#792): cover roster guard and installer heading

packages/mosaic/src/commands/install-heading.spec.ts

@@ -0,0 +1,17 @@
+import { readFile } from 'node:fs/promises';
+import { fileURLToPath } from 'node:url';
+import { describe, expect, it } from 'vitest';
+
+const INSTALLER_PATH = fileURLToPath(new URL('../../../../tools/install.sh', import.meta.url));
+
+describe('installer CLI package heading', () => {
+  it('renders the scoped package name intact', async () => {
+    const installer = await readFile(INSTALLER_PATH, 'utf8');
+    const step = installer.match(/^step\(\)\s*\{.*\}$/m)?.[0];
+
+    expect(step).toBeDefined();
+
+    expect(step).toContain('printf \'\\n%s%s%s\\n\' "$BOLD" "$*" "$RESET"');
+    expect(installer).toContain('step "@mosaicstack/mosaic (npm package)"');
+  });
+});