public void Will_filter_for_employer_expense_records_when_loading() { // Arrange var mock_expected_income_file = new Mock <ICSVFile <ExpectedIncomeRecord> >(); var expected_income_file = new ExpectedIncomeFile(mock_expected_income_file.Object); // Act expected_income_file.Load(); // Assert mock_expected_income_file.Verify(x => x.Remove_records(It.IsAny <System.Predicate <ExpectedIncomeRecord> >())); }