TestInvoiceStatementDeletion

@isTest
private class TestInvoiceStatementDeletion {
	static testmethod void TestDeleteInvoiceWithLineItem() {
		// Create an invoice with a line item then try to delete it
		Invoice__c inv = TestDataFactory.createOneInvoiceStatement(true);
		Test.startTest();
		Database.DeleteResult result = Database.delete(inv, false);
		Test.stopTest();
		// Verify invoice with a line item didn't get deleted.
		System.assert(!result.isSuccess());
	}
    
	static testmethod void TestDeleteInvoiceWithoutLineItems() {
		// Create an invoice without a line item and try to delete it
		Invoice__c inv = TestDataFactory.createOneInvoiceStatement(false);
		Test.startTest();
		Database.DeleteResult result = Database.delete(inv, false);
		Test.stopTest();
		// Verify invoice without line items got deleted.
		System.assert(result.isSuccess());
	}
    
	static testmethod void TestBulkDeleteInvoices() {
		// Create two invoices, one with and one with out line items
		// Then try to delete them both in a bulk operation, as might happen
		// when a trigger fires.
		List<Invoice__c> invList = new List<Invoice__c>();
		invList.add(TestDataFactory.createOneInvoiceStatement(true));
		invList.add(TestDataFactory.createOneInvoiceStatement(false));
		Test.startTest();
		Database.DeleteResult[] results = Database.delete(invList, false);
		Test.stopTest();
		// Verify the invoice with the line item didn't get deleted
		System.assert(!results[0].isSuccess());
		// Verity the invoice without line items did get deleted.
		System.assert(results[1].isSuccess());
	}
}