public function testcreate_export_query()
 {
     $opportunity = new Opportunity();
     //test with empty string params
     $expected = "SELECT \n                            accounts.id as account_id,\n                            accounts.name as account_name,\n                            accounts.assigned_user_id account_id_owner,\n                            users.user_name as assigned_user_name ,opportunities_cstm.* ,opportunities.*\n                            FROM opportunities LEFT JOIN users\n                            ON opportunities.assigned_user_id=users.id LEFT JOIN accounts_opportunities\n                            ON opportunities.id=accounts_opportunities.opportunity_id\n                            LEFT JOIN accounts\n                            ON accounts_opportunities.account_id=accounts.id  LEFT JOIN opportunities_cstm ON opportunities.id = opportunities_cstm.id_c where \n\t\t\t(accounts_opportunities.deleted is null OR accounts_opportunities.deleted=0)\n\t\t\tAND (accounts.deleted is null OR accounts.deleted=0)\n\t\t\tAND opportunities.deleted=0 ORDER BY opportunities.name";
     $actual = $opportunity->create_list_query('', '');
     $this->assertSame($expected, $actual);
     //test with valid string params
     $expected = "SELECT \n                            accounts.id as account_id,\n                            accounts.name as account_name,\n                            accounts.assigned_user_id account_id_owner,\n                            users.user_name as assigned_user_name ,opportunities_cstm.* ,opportunities.*\n                            FROM opportunities LEFT JOIN users\n                            ON opportunities.assigned_user_id=users.id LEFT JOIN accounts_opportunities\n                            ON opportunities.id=accounts_opportunities.opportunity_id\n                            LEFT JOIN accounts\n                            ON accounts_opportunities.account_id=accounts.id  LEFT JOIN opportunities_cstm ON opportunities.id = opportunities_cstm.id_c where (accounts.name=\"\") AND \n\t\t\t(accounts_opportunities.deleted is null OR accounts_opportunities.deleted=0)\n\t\t\tAND (accounts.deleted is null OR accounts.deleted=0)\n\t\t\tAND opportunities.deleted=0 ORDER BY accounts.id";
     $actual = $opportunity->create_list_query('accounts.id', 'accounts.name=""');
     $this->assertSame($expected, $actual);
 }