tests: add instance sync test

tests/test_core/test_sync.py

@@ -0,0 +1,27 @@
+from pathlib import Path
+from dooit.api.manager import Manager
+from dooit.api.workspace import Workspace
+from tests.test_core.core_base import CoreTestBase
+import tempfile
+
+class TestSync(CoreTestBase):
+    def test_sync(self):
+
+        # create a temporary folder
+        temp_folder = tempfile.TemporaryDirectory(delete = False)
+        temp_db = Path(temp_folder.name) / "dooit1.db"
+        TEMP_CONN = f"sqlite:////{temp_db}"
+
+        manager1 = Manager()
+        manager2 = Manager()
+
+        manager1.register_engine(TEMP_CONN)
+        manager2.register_engine(TEMP_CONN)
+
+        w = Workspace(description="test")
+        manager1.save(w)
+
+        self.assertFalse(manager1.has_changed())
+        self.assertTrue(manager2.has_changed())
+
+        temp_folder.cleanup()