First Working version. I can add table

tests/test_dummydbengine.py

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+import os.path
+
+import pytest
+
+from core.dbengine import DbException
+from core.settings_management import DummyDbEngine
+from core.settings_objects import BudgetTrackerSettings
+
+settings_file = DummyDbEngine().db_path
+
+FAKE_USER_ID = "FakeUserId"
+
+
+@pytest.fixture(autouse=True)
+def setup_and_finalize():
+    if os.path.exists(settings_file):
+        os.remove(settings_file)
+
+    yield
+
+    if os.path.exists(settings_file):
+        os.remove(settings_file)
+
+
+@pytest.fixture()
+def engine():
+    return DummyDbEngine()
+
+
+def test_i_can_save_and_load(engine):
+    obj = BudgetTrackerSettings(
+        spread_sheet="spread_sheet",
+        col_row_num="row_number",
+        col_project="project",
+        col_owner="owner",
+        col_capex="capex",
+        col_details="details",
+        col_supplier="supplier",
+        col_budget_amt="budget",
+        col_actual_amt="actual",
+        col_forecast5_7_amt="forecast5_7",
+    )
+
+    engine.save(FAKE_USER_ID, "MyEntry", obj)
+
+    res = engine.load(FAKE_USER_ID, "MyEntry")
+    assert isinstance(res, BudgetTrackerSettings)
+
+    assert res.spread_sheet == obj.spread_sheet
+    assert res.col_row_num == obj.col_row_num
+    assert res.col_project == obj.col_project
+    assert res.col_owner == obj.col_owner
+    assert res.col_capex == obj.col_capex
+    assert res.col_details == obj.col_details
+    assert res.col_supplier == obj.col_supplier
+    assert res.col_budget_amt == obj.col_budget_amt
+    assert res.col_actual_amt == obj.col_actual_amt
+    assert res.col_forecast5_7_amt == obj.col_forecast5_7_amt
+
+
+def test_i_can_save_and_modify(engine):
+    obj = BudgetTrackerSettings()
+    engine.save(FAKE_USER_ID, "MyEntry", obj)
+
+    obj = BudgetTrackerSettings(
+        spread_sheet="modified_spread_sheet",
+        col_row_num="modified_row_number",
+        col_project="modified_project",
+        col_owner="modified_owner",
+        col_capex="modified_capex",
+        col_details="modified_details",
+        col_supplier="modified_supplier",
+        col_budget_amt="modified_budget",
+        col_actual_amt="modified_actual",
+        col_forecast5_7_amt="forecast5_7",
+    )
+    engine.save(FAKE_USER_ID, "MyEntry", obj)
+
+    res = engine.load(FAKE_USER_ID, "MyEntry")
+
+    assert isinstance(res, BudgetTrackerSettings)
+    assert res.spread_sheet == obj.spread_sheet
+    assert res.col_row_num == obj.col_row_num
+    assert res.col_project == obj.col_project
+    assert res.col_owner == obj.col_owner
+    assert res.col_capex == obj.col_capex
+    assert res.col_details == obj.col_details
+    assert res.col_supplier == obj.col_supplier
+    assert res.col_budget_amt == obj.col_budget_amt
+    assert res.col_actual_amt == obj.col_actual_amt
+    assert res.col_forecast5_7_amt == obj.col_forecast5_7_amt
+
+
+def test_i_cannot_load_if_no_setting_file(engine):
+    with pytest.raises(DbException) as ex:
+        engine.load(FAKE_USER_ID, "MyEntry")
+
+    assert str(ex.value) == f"Entry 'MyEntry' is not found."
+
+
+def test_i_cannot_load_if_no_entry_found(engine):
+    obj = BudgetTrackerSettings()
+    engine.save(FAKE_USER_ID, "AnotherEntry", obj)
+
+    with pytest.raises(DbException) as ex:
+        engine.load(FAKE_USER_ID, "MyEntry")
+
+    assert str(ex.value) == f"Entry 'MyEntry' is not found."