feat(fusion_accounting_core): add _fusion_is_enterprise_accounting_installed helper

Made-with: Cursor

fusion_accounting_core/tests/__init__.py

@@ -1 +1 @@
-# Tests populated in Tasks 8-12
+from . import test_enterprise_detection

fusion_accounting_core/tests/test_enterprise_detection.py

@@ -0,0 +1,20 @@
+from odoo.tests.common import TransactionCase, tagged
+
+
+@tagged('post_install', '-at_install')
+class TestEnterpriseDetection(TransactionCase):
+    """Verify the helper that detects Odoo Enterprise accounting installs."""
+
+    def test_helper_returns_bool(self):
+        result = self.env['ir.module.module']._fusion_is_enterprise_accounting_installed()
+        self.assertIsInstance(result, bool)
+
+    def test_helper_matches_actual_state(self):
+        """Helper should return True iff one of the known Enterprise modules is installed."""
+        installed = self.env['ir.module.module'].sudo().search_count([
+            ('name', 'in', ['account_accountant', 'account_reports', 'accountant']),
+            ('state', '=', 'installed'),
+        ])
+        expected = bool(installed)
+        actual = self.env['ir.module.module']._fusion_is_enterprise_accounting_installed()
+        self.assertEqual(actual, expected)