TestCareAssistant is a tool that can automatically repair unit tests that fail to compile due to changes in method declarations. It repairs compilation errors by making changes like modifying parameter types, adding or removing parameters, or changing return types. The tool was able to automatically repair 72% of tests cases, 75% of compilation errors, and initialize parameter values correctly in 80% of cases across several open source projects. However, static data flow analysis is not always effective for repairing tests that use complex data structures.
Por qué usar Spock en lugar de JUnit / Mockito para tus tests Java - Codemoti...Andrés Viedma Peláez
Puede que hayas oído hablar de Spock, el framework basado en Groovy que te permite hacer tus tests Java más legibles y expresivos. Pero seguramente no hayas visto una comparación de código real de tests hechos en librerías de test típicas como son JUnit y Mockito y cómo se harían en Spock, algo que realmente te haga consciente de lo que ganas, y lo que pierdes, al hacer tus tests con Spock.
En esta charla no solo mostraremos eso, sino que repasaremos algunas recomendaciones de buenas prácticas típicas para los tests unitarios o de integración en Java, y veremos cómo se ven afectadas al usar Spock. Cómo algunas pierden importancia y hasta sentido, y otras nuevas aparecen para reemplazarlas. Cómo ahora puedes pensar más en el qué que en el cómo, cómo todo es más sencillo. Y cómo pierdes también cosas por el camino.
¿Te atreves a cambiar la forma de hacer tus tests?
Por qué usar Spock en lugar de JUnit / Mockito para tus tests Java - Codemoti...Andrés Viedma Peláez
Puede que hayas oído hablar de Spock, el framework basado en Groovy que te permite hacer tus tests Java más legibles y expresivos. Pero seguramente no hayas visto una comparación de código real de tests hechos en librerías de test típicas como son JUnit y Mockito y cómo se harían en Spock, algo que realmente te haga consciente de lo que ganas, y lo que pierdes, al hacer tus tests con Spock.
En esta charla no solo mostraremos eso, sino que repasaremos algunas recomendaciones de buenas prácticas típicas para los tests unitarios o de integración en Java, y veremos cómo se ven afectadas al usar Spock. Cómo algunas pierden importancia y hasta sentido, y otras nuevas aparecen para reemplazarlas. Cómo ahora puedes pensar más en el qué que en el cómo, cómo todo es más sencillo. Y cómo pierdes también cosas por el camino.
¿Te atreves a cambiar la forma de hacer tus tests?
Se guardiamo oltre la meccanica, il TDD è una tecnica complessa perché richiede molteplici skill. Da principiante dopo l’implementazione di poche storie ti imbatti nel problema dei test che si rompono ad ogni refactoring, è arrivato il momento di migliorare i propri skill di scrittura dei test. Nel talk analizzeremo la struttura dei test, quali sono le bad smell più comuni e come porvi rimedio.
Mutation Analysis for JavaScript Web Applicaiton Testing SEKE2013nkazuki
This slide is for a presentation at the 25th International Conference on Software Engineering and Knowledge Engineering (SEKE'13) at Boston.
Abstract of the published paper:
When developers test modern web applications that use JavaScript, challenging issues lie in their event-driven, asynchronous, and dynamic features. Many researchers have assessed the adequacy of test cases with code coverage criteria; however, in this paper, we show that the code coverage-based approach possibly misses some faults in the applications. We propose a mutation analysis approach for estimating the fault-finding capability of test cases. We assume that developers can find overlooked fault instances and improve the test cases with the estimated capability. To create a set of faulty programs, i.e., mutants, we classify the JavaScript features in web applications and then define a comprehensive set of mutation operators. We conducted a case study on a real-world application and found that our approach supported the improvement of test cases to expose hand-seeded faults by an extra ten percent.
You can find the transcript used in the presentation from the link below:
https://docs.google.com/document/d/1CsqcYKyHZQL6Z7OkM_LVVyB-aMURMWl37lc03LOa4fI/edit?usp=sharing
Wiktor Toporek: Pomimo tego że JavaScript mocno ewoluował na przestrzeni ostatnich lat, zakorzeniona w nim jego asynchroniczna natura wciąż może sprawiać problem programistom i to zarówno początkującym jak i tym zaawansowanym. W prezentacji przyjrzymy się jednemu z bohaterów programowania asynchronicznego jakim jest Promise, przeanalizujemy niektóre z pułapek oraz zastanowimy się również czy w pełni wykorzystujemy jego potencjał.
Developer Experience i TypeScript. Najbardziej ikoniczne duoThe Software House
Wiktor Toporek: TypeScript bez wątpienia jest obecnie pewnym standardem wśród obecnych rozwiązań powstałych w JavaScripcie. Ale czy poza byciem dodatkiem który uzupełnia odrobinę dokumentacje i deklaruje kontrakt jakiego typu parametry przyjmują i zwracają np. funkcje jakiejś biblioteki, można wycisnąć z niego coś więcej? Podczas prezentacji wykorzystamy TypeScript do granic możliwości, używając zaawansowanych technik które sprawiają że interfejs naszego API będzie sam kierował używających go developerów na drogę poprawnego użycia, które jest zgodne z naszymi (twórców) założeniami, poprawiając tym samym ich doświadczenia.
When it comes to writing tests we often live in the here-and-now and consequently end up producing "write-only" tests. This session looks at what we need to consider if we want to create tests that our future selves and teammates will find valuable instead of becoming another burden on top of delivering the feature itself.
If there is one place that we find it easy to take shortcuts it's when writing tests. Whether we're under the cosh or have an overly-optimistic view of our ability to write self-documenting code, instead of creating tests that support the production code and development process we can find ourselves producing WTFs (Weak Test Functions). The net effect is often a viscous cycle that disparages, instead of encourages us.
In the past I've tried many different ways to try and short-circuit the test writing process, but have only come-up short every time. This session takes a look at why skimping on elements of the test structure, such as organisation, naming and scope only leads to pain and hardship in the long run. Along the way we'll uncover the truth behind common folklore, such as only having one assertion per test.
Unit testing patterns for concurrent codeDror Helper
Getting started with unit testing is not hard, the only problem is that most programs are more than a simple calculator with two parameters and a returns value that is easy to verify. Writing unit tests for multi-threaded code is harder still. Over the years I discovered useful patterns that helped me to test multi-threaded and asynchronous code and enabled the creation of deterministic, simple and robust unit tests. Come learn how to test code that uses concurrency and parallelism – so that the excuses of not writing unit tests for such code would become as obsolete as a single core processors.
Se guardiamo oltre la meccanica, il TDD è una tecnica complessa perché richiede molteplici skill. Da principiante dopo l’implementazione di poche storie ti imbatti nel problema dei test che si rompono ad ogni refactoring, è arrivato il momento di migliorare i propri skill di scrittura dei test. Nel talk analizzeremo la struttura dei test, quali sono le bad smell più comuni e come porvi rimedio.
Mutation Analysis for JavaScript Web Applicaiton Testing SEKE2013nkazuki
This slide is for a presentation at the 25th International Conference on Software Engineering and Knowledge Engineering (SEKE'13) at Boston.
Abstract of the published paper:
When developers test modern web applications that use JavaScript, challenging issues lie in their event-driven, asynchronous, and dynamic features. Many researchers have assessed the adequacy of test cases with code coverage criteria; however, in this paper, we show that the code coverage-based approach possibly misses some faults in the applications. We propose a mutation analysis approach for estimating the fault-finding capability of test cases. We assume that developers can find overlooked fault instances and improve the test cases with the estimated capability. To create a set of faulty programs, i.e., mutants, we classify the JavaScript features in web applications and then define a comprehensive set of mutation operators. We conducted a case study on a real-world application and found that our approach supported the improvement of test cases to expose hand-seeded faults by an extra ten percent.
You can find the transcript used in the presentation from the link below:
https://docs.google.com/document/d/1CsqcYKyHZQL6Z7OkM_LVVyB-aMURMWl37lc03LOa4fI/edit?usp=sharing
Wiktor Toporek: Pomimo tego że JavaScript mocno ewoluował na przestrzeni ostatnich lat, zakorzeniona w nim jego asynchroniczna natura wciąż może sprawiać problem programistom i to zarówno początkującym jak i tym zaawansowanym. W prezentacji przyjrzymy się jednemu z bohaterów programowania asynchronicznego jakim jest Promise, przeanalizujemy niektóre z pułapek oraz zastanowimy się również czy w pełni wykorzystujemy jego potencjał.
Developer Experience i TypeScript. Najbardziej ikoniczne duoThe Software House
Wiktor Toporek: TypeScript bez wątpienia jest obecnie pewnym standardem wśród obecnych rozwiązań powstałych w JavaScripcie. Ale czy poza byciem dodatkiem który uzupełnia odrobinę dokumentacje i deklaruje kontrakt jakiego typu parametry przyjmują i zwracają np. funkcje jakiejś biblioteki, można wycisnąć z niego coś więcej? Podczas prezentacji wykorzystamy TypeScript do granic możliwości, używając zaawansowanych technik które sprawiają że interfejs naszego API będzie sam kierował używających go developerów na drogę poprawnego użycia, które jest zgodne z naszymi (twórców) założeniami, poprawiając tym samym ich doświadczenia.
When it comes to writing tests we often live in the here-and-now and consequently end up producing "write-only" tests. This session looks at what we need to consider if we want to create tests that our future selves and teammates will find valuable instead of becoming another burden on top of delivering the feature itself.
If there is one place that we find it easy to take shortcuts it's when writing tests. Whether we're under the cosh or have an overly-optimistic view of our ability to write self-documenting code, instead of creating tests that support the production code and development process we can find ourselves producing WTFs (Weak Test Functions). The net effect is often a viscous cycle that disparages, instead of encourages us.
In the past I've tried many different ways to try and short-circuit the test writing process, but have only come-up short every time. This session takes a look at why skimping on elements of the test structure, such as organisation, naming and scope only leads to pain and hardship in the long run. Along the way we'll uncover the truth behind common folklore, such as only having one assertion per test.
Unit testing patterns for concurrent codeDror Helper
Getting started with unit testing is not hard, the only problem is that most programs are more than a simple calculator with two parameters and a returns value that is easy to verify. Writing unit tests for multi-threaded code is harder still. Over the years I discovered useful patterns that helped me to test multi-threaded and asynchronous code and enabled the creation of deterministic, simple and robust unit tests. Come learn how to test code that uses concurrency and parallelism – so that the excuses of not writing unit tests for such code would become as obsolete as a single core processors.
“Program to an interface, not an implementation” they[1] say …
But when IMyInterface foo = new IMyInterface() is not valid code … how are you supposed to achieve that ? The answer is Dependency Injection.
In this talk, we’ll talk about Dependency injection, what it is and what it is not. We’ll see how it is a valuable set of practices and patterns that help design maintainable software built on top of the SOLID object-oriented principles.
We’ll see how, when used properly, it delivers many benefits such as extensibility and testability … We’ll also cover some anti-patterns, ways of using Dependency Injection that can lead to code that is painful to understand and maintain
This talk is not about DI/IOC containers per se, but focuses on the core concepts of Dependency Injection. Those concepts are essential to understand how to use those “magic-looking” tools (if they are needed at all …)
This talk is not only for .NET developers. It will contain code examples written in C#, but should be understandable by developers with knowledge in other statically-typed object-oriented languages such as Java, Vb.NET, C++ …
1-What are the opportunities and threats that could impact the orgAbbyWhyte974
1-What are the opportunities and threats that could impact the organization?
· Review all the general environmental categories. (PESTEL Analysis)
· Use Porter’s Five Forces model to analyze the company’s industry. Identify key competitors and analyze their strategies, core competencies, and competitive response.
2-What are the strengths or weaknesses of the organization?
· Review factors within the company that are critical to the strategy of the firm and classify them as strengths or weaknesses.
· Look for resources, capabilities, and core competencies.
· Use the "Four Criteria of Sustainable Competitive Advantage".
3-In the past, BMW has been able to successfully differentiate its products by engaging in value-adding value chain activities. What are some of these specific activities? How can BMW ensure its ability to continue with value-adding activities as it evolves into a maker of self-driving cars?
· Use the "Value Chain Analysis" to identify value-adding activities and functions.
· This question is not about Business or Corporate level strategies. focus on the functional level.
Programming Using Inheritance/Programming Using Inheritance/.vs/Programming Using Inheritance/v16/.suo
Programming Using Inheritance/Programming Using Inheritance/Account.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Programming_Using_Inheritance
{
class Account
{
//Declares the instance variable for the class
private decimal Balance;
private string AccountName;
private int AccountNumber;
//Creates the class constructor and initialize its instance variables using mutator methods
public Account(decimal Balance, string AccountName, int AccountNumber)
{
setAccontNumber(AccountNumber);
setAccountName(AccountName);
//For the balance initialization to make sure it is greater than zero
if (Balance >= 0)
setBalance(Balance);
else
setBalance(Balance);
}
//Creates mutator methods to set balance, accountNumber and accountName
public void setBalance(decimal Balance)
{
this.Balance = Balance;
}
public void setAccontNumber(int AccountNumber)
{
this.AccountNumber = AccountNumber;
}
public void setAccountName(string AccountName)
{
this.AccountName = AccountName;
}
//To get the instance field variables
public decimal getBalance()
{
return this.Balance;
}
public int getAccontNumber()
{
return this.AccountNumber;
}
public string getAccountName()
{
return this.AccountName;
}
//Creates a credit method to add current balance to passed balance ...
1-What are the opportunities and threats that could impact the orgMartineMccracken314
1-What are the opportunities and threats that could impact the organization?
· Review all the general environmental categories. (PESTEL Analysis)
· Use Porter’s Five Forces model to analyze the company’s industry. Identify key competitors and analyze their strategies, core competencies, and competitive response.
2-What are the strengths or weaknesses of the organization?
· Review factors within the company that are critical to the strategy of the firm and classify them as strengths or weaknesses.
· Look for resources, capabilities, and core competencies.
· Use the "Four Criteria of Sustainable Competitive Advantage".
3-In the past, BMW has been able to successfully differentiate its products by engaging in value-adding value chain activities. What are some of these specific activities? How can BMW ensure its ability to continue with value-adding activities as it evolves into a maker of self-driving cars?
· Use the "Value Chain Analysis" to identify value-adding activities and functions.
· This question is not about Business or Corporate level strategies. focus on the functional level.
Programming Using Inheritance/Programming Using Inheritance/.vs/Programming Using Inheritance/v16/.suo
Programming Using Inheritance/Programming Using Inheritance/Account.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Programming_Using_Inheritance
{
class Account
{
//Declares the instance variable for the class
private decimal Balance;
private string AccountName;
private int AccountNumber;
//Creates the class constructor and initialize its instance variables using mutator methods
public Account(decimal Balance, string AccountName, int AccountNumber)
{
setAccontNumber(AccountNumber);
setAccountName(AccountName);
//For the balance initialization to make sure it is greater than zero
if (Balance >= 0)
setBalance(Balance);
else
setBalance(Balance);
}
//Creates mutator methods to set balance, accountNumber and accountName
public void setBalance(decimal Balance)
{
this.Balance = Balance;
}
public void setAccontNumber(int AccountNumber)
{
this.AccountNumber = AccountNumber;
}
public void setAccountName(string AccountName)
{
this.AccountName = AccountName;
}
//To get the instance field variables
public decimal getBalance()
{
return this.Balance;
}
public int getAccontNumber()
{
return this.AccountNumber;
}
public string getAccountName()
{
return this.AccountName;
}
//Creates a credit method to add current balance to passed balance ...
C++ Bank Account Error Fix, full code. I am using Dev-C++ to Compile.pdfJUSTSTYLISH3B2MOHALI
C++ Bank Account Error Fix, full code. I am using Dev-C++ to Compile and Execute.
The project is below, I have supplied the code and I\'m getting an error in SavingsAccount.h file.
17 5 C:\\Users\\adam.brunell\\Documents\\Classes\\C++\\Week4\\SavingsAccount.h [Error]
\'SavingsAccount::SavingsAccount(std::string, double, double)\' is protected
A.Assume
i.SavingsAccount: Assume an Interest Rate of 0.03
ii.HighInterestSavings: Assume an Interest Rate of 0.05, Minimum Balance = $2500
iii.NoServiceChargeChecking: Assume an Interest Rate = 0.02, Minimum of Balance = $1000
iv.ServiceChargeChecking – Assume account service charge = $10, Maximum number of checks
= 5, Service Charge if customer exceeds the maximum number of checks = $5.
v.NoServicechargeChecking: Assume an interest rate = 0.02, Minimum Balance = $1000
vi.HighInterestChecking: Assume an interest rate = 0.05, Minimum Balance = $5000
vii.CertificateOfDepsit: Assume an interest rate = 0.05, Initial Number of Maturity Months = 6
B.Capitalize the first letter of the derived class names.
C.Use the following driver to validate your program:
#include
#include
#include
#include \"bankAccount.h\"
#include \"SavingsAccount.h\"
#include \"HighInterestSavings.h\"
#include \"NoServiceChargeChecking.h\"
#include \"ServiceChargeChecking.h\"
#include \"HighInterestChecking.h\"
#include \"CertificateOfDeposit.h\"
#include \"checkingAccount.h\"
using namespace std;
int main()
{
vector accountsList;
//SavingsAccount( Name, Account number, Balance ) - Assume an interest rate = 0.03
accountsList.push_back(new SavingsAccount(\"Bill\", 10200, 2500));
//HighInterestSavings(Name, Account Number, Balance) -- Assume an interest rate = 0.05,
Minimum balance = $2500
accountsList.push_back(new HighInterestSavings(\"Susan\", 10210, 2000));
//NoServiceChargeChecking(Name, Account Number, Balance) -- Assume an interest rate =
0.02, Minimum balance = $1000
accountsList.push_back(new NoServiceChargeChecking(\"John\", 20100,
3500));
//ServiceChargeChecking(Name, Account Number, Balance) -- Assume account service
charge = $10, Maximum number of checks = 5, Service Charee Excess Number of Checks = $5
accountsList.push_back(new ServiceChargeChecking(\"Ravi\", 30100, 1800));
//HighIntererestChecking(Name, Account Number, Balance) - Assume an inerest rate =
0.05, Minimum balance = $5000
accountsList.push_back(new HighInterestChecking(\"Sheila\", 20200, 6000));
//Certificate(name, Account Number, Balance, Interest Rate, Number of Months) - Assume
an initial interest rate = 0.05, Initial Number of Maturity Months = 6
accountsList.push_back(new CertificateOfDeposit(\"Hamid\", 51001, 18000,
0.075, 18));
cout << \"January:\ -------------\" << endl;
for (int i = 0; i < accountsList.size(); i++)
{
accountsList[i]->createMonthlyStatement();
accountsList[i]->print();
cout << endl;
}
cout << \"\ February:\ -------------\" << endl;
for (int i = 0; i < accountsList.size(); i++)
{
accountsList[i]->createMonthlyStatement();
accountsList[i]->.
Change to oop formatimport java.util.Scanner;import java.io.;.pdfMAYANKBANSAL1981
Change to oop format
import java.util.Scanner;
import java.io.*;
import java.text.DecimalFormat;
public class Amortization {
/* call values in, set balance and principle. set month to increment until reaching number
provided. use \t to space out result well.
Use PritWriter output instead of System.output to make the notepad file.*/
public static void createReport(String filename, double loan, double interestRate, int years)
throws IOException {
PrintWriter output = new PrintWriter(new FileWriter(filename));
double monthlyPayment = calcPayment(loan, interestRate, years);
int numberOfPayments = getNumberOfPayments(years);
double balance = loan;
output.println("{Monthly Payment}: " + monthlyPayment);
output.println("{Month} \t {Interest} \t {Principal} \t {Balance}");
for (int month = 1; month <= numberOfPayments; month++) {
double interest = balance * (interestRate / 12);
double principal = monthlyPayment - interest;
balance -= principal;
output.printf("%d \t \t %.2f \t \t %.2f \t \t %.2f \\\n", month, interest, principal, balance);
}
output.close();
}
public static void main(String[] args) {
Scanner keyboard = new Scanner(System.in);
DecimalFormat df = new DecimalFormat("#.##");
do {
/* Data members */
double loan;
int years;
double interestRate;
/* Get amount, interest rate, and years from the user */
System.out.println("Enter the loan amount: ");
loan = keyboard.nextDouble();
System.out.println("Enter the annual interest rate: ");
interestRate = keyboard.nextDouble() / 100.0;
System.out.println("Enter the years of the loan: ");
years = keyboard.nextInt();
double payment = calcPayment(loan, interestRate, years);
if (payment < 0) {
System.out.println("Invalid input values.");
} else {
System.out.println("Monthly Payment: " + df.format(payment));
int numberOfPayments = getNumberOfPayments(years);
System.out.println("Total Number of Payments: " + numberOfPayments);
try {
createReport("LoanAmortization.txt", loan, interestRate, years);
System.out.println("Report created successfully.");
} catch (IOException e)
{
System.out.println("Error creating report: " + e.getMessage());
}
}
System.out.println("Would you like to run another report? Enter Y for yes or N for no: ");
} while (keyboard.next().equalsIgnoreCase("Y"));
keyboard.close();
}
public static double calcPayment(double loan, double interestRate, int years) {
double term = Math.pow(1 + (interestRate / 12), years * 12);
double payment = (loan * (interestRate / 12) * term) / (term - 1);
return payment;
}
public static int getNumberOfPayments(int years) {
return years * 12; // Assuming monthly payments for the given number of years
}
public static void createReport(String filename) throws IOException {
// Sample implementation to save data to a file
PrintWriter out = new PrintWriter(new FileWriter(filename, true));
out.println("Sample Data");
out.close();
}
}.
Bank Program in JavaBelow is my code(havent finished, but it be .pdfizabellejaeden956
Bank Program in Java
Below is my code(haven\'t finished, but it be run without error messages.)
My problem is in Case 1. For example, if I enter two customers:
Name: John Kangas Account Number: A123 Balance: 300
Name: Mary White Account Number: B321 Balance: 600
In the output -- For testing, I expected it to be like this:
***For Testing!
John Kangas
Balance: 300.0
****
***For Testing!
Mary White
Balance: 600.0
****
However, it actually came out like this:
***For Testing!
Mary White
Balance: 600.0
****
***For Testing!
Mary White
Balance: 600.0
****
It seems that the second information replace the first one. Could anyone help me figure it out??
Thank you so much!!
=========
Bank Class
=========
import java.util.ArrayList;
import java.util.Scanner;
public class Bank {
String routingNum;
static Customer customer;
static ArrayList customerList = new ArrayList();
private static int numOfCustomers = 0;
private static double bal;
public Bank(){
routingNum = \"000000\";
}
public static void newCustomer(String f, String l, String accNum, double bal){
Account acc = Customer.OpenAccount(accNum,bal);
customer = new Customer(f,l,acc);
customerList.add(customer);
numOfCustomers ++;
//For Testing
for (int i = 0; i < numOfCustomers; i++ ){
System.out.println(\"\ ***For Testing!\ \"+ customerList.get(i).getName());
System.out.println(\"Balance: \" + customerList.get(i).getAccount().getBalance());
System.out.println(\"****\");
}
}
public static double findCustomer(String f, String l, String accNum){
//For Testing
System.out.println(\"***For Testing!\ \"+ \"numOfCustomers: \" + numOfCustomers);
for (int i = 0; i < numOfCustomers; i++){
String name = customerList.get(i).getName();
int n = name.indexOf(\" \");
int L = name.length();
String first = name.substring(0, n); //In order to separate
String last = name.substring(n+1, L); //first and last name
String accN = customerList.get(i).getAccount().getAccountNum();
//For Testing
System.out.println(\"***For Testing!\ \" + \"acc num: \" + accN);
if ( f.equals(first) && l.equals(last) || accNum.equals(accN) ){
bal = customerList.get(i).getAccount().getBalance();
System.out.print(\"\ Balance: \" + bal +\" \ \");
}else{
System.out.println(\"No Found Account.\");
}
}
return bal;
}
public static void main(String[] args){
Scanner s = new Scanner(System.in);
boolean control = true;
while(control){
System.out.println(\"Hello! Welcome to New Century Bank!\");
System.out.println(\"Enter(\'1\'): Open an Account\");
System.out.println(\"Enter(\'2\'): Get your balance\");
System.out.println(\"Enter(\'3\'): Deposit\");
System.out.println(\"Enter(\'4\'): Withdraw\");
System.out.println(\"Enter(\'5\'): Close an Account\");
System.out.println(\"Enter(\'6\'): Exit\");
int user_choice = s.nextInt();
String input1, input2, input3;
double input4;
switch(user_choice){
case 1: System.out.println(\"Your name(first last): \");
input1 = s.next();
input2 = s.next();
System.out.println(\"Enter an account number: \");
input3 = s.next();
System.ou.
I need help creating a basic and simple Java program. Here is the ex.pdfrajeshjangid1865
I need help creating a basic and simple Java program. Here is the exercise. I have included my
Account class that is referred to at the bottom, below the exercise.
Use the Account class created in Programming Exercise 9.7 to simulate an ATM machine.
Create ten accounts in an array with id 0, 1, . . . , 9, and initial balance $100. The system prompts
the user to enter an id. If the id is entered incorrectly, ask the user to enter a correct id. Once an
id is accepted, the main menu is displayed as shown in the sample run. You can enter a choice 1
for viewing the current balance, 2 for withdrawing money, 3 for depositing money, and 4 for
exiting the main menu. Once you exit, the system will prompt for an id again. Thus, once the
system starts, it will not stop. You will need to cntrl-c to stop your program; this is ok for this
assignment. If you want your program to terminate more elegantly you can add in additional
logic, but this is not required.
Please refer to textbook for sample output pg. 401.
Account.java
import java.util.Date;
public class Account {
private int id;
private double balance;
static private double annualInterestRate = 0;
private Date dateCreated;
public Account() {
dateCreated = new Date();
}
public Account(int id, double balance) {
this.id = id;
this.balance = balance;
dateCreated = new Date();
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public double getBalance() {
return balance;
}
public void setBalance(double balance) {
this.balance = balance;
}
public static double getAnnualInterestRate() {
return annualInterestRate;
}
public static void setAnnualInterestRate(double annualInterestRate) {
Account.annualInterestRate = annualInterestRate;
}
public Date getDateCreated() {
return dateCreated;
}
public double getMonthlyInterestRate() {
double monthlyInterestRate = getAnnualInterestRate() / 1200;
return monthlyInterestRate;
}
public double getMonthlyInterest() {
double monthlyInterest= getBalance() * getMonthlyInterestRate();
return monthlyInterest;
}
public void withdraw(double amount) {
balance = getBalance() - amount;
}
public void deposit(double amount) {
balance = getBalance() + amount;
}
}
Solution
//This is your Account Class
package com.ATMBanking;
import java.util.Date;
public class Account {
private int id;
private double balance;
static private double annualInterestRate = 0;
private Date dateCreated;
public Account() {
dateCreated = new Date();
}
public Account(int id, double balance) {
this.id = id;
this.balance = balance;
dateCreated = new Date();
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public double getBalance() {
return balance;
}
public void setBalance(double balance) {
this.balance = balance;
}
public static double getAnnualInterestRate() {
return annualInterestRate;
}
public static void setAnnualInterestRate(double annualInterestRate) {
Account.annualInterestRate = annualInterestRate;
}
public Date getDateCreated() {
return dateCreat.
import java.util.Scanner;
import java.text.DecimalFormat;
import java.io.*;
public class SavingAccount //MUST match the file name!
{
public static void main(String[] args)throws IOException
{
//Create a decimal format for displaying dollars
DecimalFormat dollar = new DecimalFormat(\"#,###.##\");
//Constants
double depositSum = 0.0;
double withdrawalSum = 0.0;
double earnedInt = 0.0;
double startBalance = 500; //Starting balance
// Executables
System.out.println(\"This program solves Programming Challenge 6.11\");
System.out.println();
//Create Scanner object for keyboard input.
Scanner keyboard = new Scanner(System.in);
//Get interest rate
System.out.print(\"Enter the annual interest: \");
double testInterest = keyboard.nextDouble();
//Create an object that accept the starting balance and annual interest
SavingAccount1 account = new SavingAccount1(startBalance, testInterest);
//Open Deposit file.
File file = new File (\"BankDeposits.txt\");
Scanner inputFile = new Scanner(file);
//Read line in file
while (inputFile.hasNext());
{
//Read numbers
double num = inputFile.nextDouble();
//Add the numbers
depositSum += num;
}
//Deposit the file input.
account.deposit(depositSum);
//Close the file
inputFile.close();
//Open Withdrawal file
File file2 = new File(\"BankWithdrawal.txt\");
Scanner inputFile2 = new Scanner(file2);
//Read lines in file
while (inputFile2.hasNext());
{
//Read numbers
double num2 = inputFile2.nextDouble();
//Add the numbers
withdrawalSum += num2;
}
//Withdrawal the file input from account.
account.withdraw(withdrawalSum);
//Close the file
inputFile2.close();
//Add the monthly interest
account.addInt();
//Get amount of interest earned.
earnedInt += account.getInterest();
//Display the data
System.out.println(\"Account balance $\" + dollar.format(account.getBalance()));
System.out.println(\"Total interest earned $\" + dollar.format(account.getInterest()));
}
}//end class
public class SavingAccount1 //MUST match the file name!
{
public static void main(String[] args)
{
System.out.println(\"This program solves Programming Challenge 6.10\");
System.out.println();
}
//Fields
private double balance; //Account balance
private double annualInterest; //annual interest
private double monthInt; //monthly interest
private double earnedInt; //earned interest
double totalWithdraw;
double totalDeposit;
/**
018
This constructor sets the starting balance
019
and the annual interest at 0.0.
020
*/
public void Ward_Tassinda_SavingAccount1()
{
balance = 0.0;
annualInterest = 0.0;
}
/**
029
This constructor set the starting balance and the annual interest rate
030
to the value passed as an argument.
031
@param startBalance The starting balance.
032
*/
public void Ward_Tassinda_SavingAccount1(double startBalance, double interestRate)
{
balance = startBalance;
annualInterest = interestRate;
}
/**
041
This constructor sets the starting balance to
042
the value in the String argument.
043
@param str The starting balance, as a String.
044
*/
public void .
from DevMotion Meetup on 2016-03-14
In our everyday work as developers, we are confronted with various software metrics. What do these numbers mean, how are they calculated? Do these metrics enable us to make better software?
In this talk we investigate the use of software metrics in general and also take a detailed look at several frequently used code quality metrics.
We will learn about the meaning and usefulness of metrics such as lines of code, cyclomatic complexity, duplication, package entanglement and unit test coverage.
Similar to Automatically Repairing Test Cases for Evolving Method Declarations (20)
Automatically Repairing Test Cases for Evolving Method Declarations
1. Automatically
RepairingTest Cases
for Evolving Method Declarations
Mehdi Mirzaaghaei
Fabrizio Pastore
Mauro Pezzè
Università
della
Svizzera
italiana
http://swiss-landmarks.ch/panos/Lugano9.jpg
3. public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance
};
}
Software evolves
4. testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance
};
}
Software evolves
5. testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance
};
}
Software evolves
6. public class .....
public class AccountUtil {
private double dailyInterestRate = 0.00005;
private int interestTerm=365;
public double interest(BankAccount account
return account.getBalance()
*dailyInterestRate*interestTerm;
}
...
public class AccountFactory {
public static BankAccount create( AccountContext ctx, boolean special ){
BankAccount account = new BankAcccount( ctx.amount );
if ( special ){
account.setInterestRate(0.0001);
}
...
public class .....
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance
};
}
Software evolves
7. public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance
};
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.centsValue;
}
public int getBalance(){
return balance;
};
}
Original classes are modified
8. public class .....
public class .....
Test cases need maintenance
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance
};
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.centsValue;
}
public int getBalance(){
return balance;
};
}
Compilation error:
Method deposit(Money) in the type
BankAccount is not applicable for
the arguments (int)
9. changes in method declarations:
23% changes
that impact on compilation
10. changes in method declarations:
23% changes
that impact on compilation
> 80% in maintenance releases
11. changes in method declarations:
23% changes
that impact on compilation
> 80% in maintenance releases
Automatic Repair to Save Effort
13. [Memon et. al. 2008, Grechanik 2009 ]
Repair GUI tests
Well suited only for GUI tests
AutomaticTest Repair
14. [Memon et. al. 2008, Grechanik 2009 ]
Repair GUI tests Repair Oracles
[B. Daniel et al 2010]
testInterest(){
...
assertEquals( 50, result );
}
FAILURE: expected 50, found: 40
assertEquals( 40, result );
Well suited only for GUI tests Focus on oracles only
AutomaticTest Repair
15. [Memon et. al. 2008, Grechanik 2009 ]
Repair GUI tests
Refactoring Techniques
[ReBa, Eclipse]
Repair Oracles
[B. Daniel et al 2010]
testInterest(){
...
assertEquals( 50, result );
}
FAILURE: expected 50, found: 40
assertEquals( 40, result );
//calculate one year interest
result = account.interest();
result = account.interest( 0 );
Well suited only for GUI tests Focus on oracles only
Prevent only some compilation errors
AutomaticTest Repair
16. TestCareAssistant
repairs test case compilation errors
• Parameter add
• Parameter type change • Return type change
• Parameter remove
caused by method declaration changes
17. TestCareAssistant
repairs test case compilation errors
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals(500, account.getBalance());
• Parameter add
• Parameter type change • Return type change
• Parameter remove
caused by method declaration changes
18. TestCareAssistant
repairs test case compilation errors
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals(500, account.getBalance());
Replace:
int amount = 500;
with:
Money amount = new Money(500);
account.deposit(amount);
• Parameter add
• Parameter type change • Return type change
• Parameter remove
caused by method declaration changes
19. TestCareAssistant
repairs test case compilation errors
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals(500, account.getBalance());
testDeposit(){
BankAccount account = new BankAccount();
Money amount = new Money(500);
account.deposit(amount);
assertEquals(500, account.getBalance());
Replace:
int amount = 500;
with:
Money amount = new Money(500);
account.deposit(amount);
• Parameter add
• Parameter type change • Return type change
• Parameter remove
caused by method declaration changes
20. TestCareAssistant
repairs test case compilation errors
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals(500, account.getBalance());
testDeposit(){
BankAccount account = new BankAccount();
Money amount = new Money(500);
account.deposit(amount);
assertEquals(500, account.getBalance());
Replace:
int amount = 500;
with:
Money amount = new Money(500);
account.deposit(amount);
• Parameter add
• Parameter type change • Return type change
• Parameter remove
caused by method declaration changes
21. TestCareAssistant
repairs test case compilation errors
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals(500, account.getBalance());
testDeposit(){
BankAccount account = new BankAccount();
Money amount = new Money(500);
account.deposit(amount);
assertEquals(500, account.getBalance());
Replace:
int amount = 500;
with:
Money amount = new Money(500);
account.deposit(amount);
• Parameter add
• Parameter type change • Return type change
• Parameter remove
caused by method declaration changes
22. TestCareAssistant
repairs test case compilation errors
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals(500, account.getBalance());
testDeposit(){
BankAccount account = new BankAccount();
Money amount = new Money(500);
account.deposit(amount);
assertEquals(500, account.getBalance());
Replace:
int amount = 500;
with:
Money amount = new Money(500);
account.deposit(amount);
• Parameter add
• Parameter type change • Return type change
• Parameter remove
caused by method declaration changes
23. Repair parameter type change
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.CentsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
24. Which parameter to initialize?
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.CentsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
25. Which parameter to initialize?
Use code diff to identify the parameter1
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.CentsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
26. How to initialize a complex object?
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.centsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
27. How to initialize a complex object?
Find first uses of parameter fields inVersion12
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.centsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
28. How to determine fields values?
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.centsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
29. How to determine fields values?
Diff to identify corresponding variable inVersion 03
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.centsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
30. What was the original value?
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.CentsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
31. What was the original value?
Analyze the def-use chain of the variable back to
the definition in the test4
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.CentsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
32. What was the original value?
Analyze the def-use chain of the variable back to
the definition in the test4
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.CentsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
33. How can we repair the test?
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.centsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
34. How can we repair the test?
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.centsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
35. How can we repair the test?
Instantiate the new object,
use original values to initialize fields5
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.centsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
36. How can we repair the test?
Instantiate the new object,
use original values to initialize fields5
Replace:
int amount = 500;
with:
Money amount = new Money(500);
account.deposit(amount);
public class BankAccount {
private int balance;
public void deposit(int cents){
balance += cents;
}
public int getBalance(){
return balance;
}
}
public class BankAccount {
private int balance;
public void deposit(Money money){
balance += money.centsValue;
}
public int getBalance(){
return balance;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals( 500, account.getBalance());
}
Version 0 Version 1
38. To what extentTestCareAssistant can
fix test cases automatically?
• Repair 22 test cases of 6 open source systems
• Continuum, Geronimo, xml-security, PMD, POI, Shindig
• 24 compilation errors caused by different changes
• 9 parameter types changed, 8 parameters added, 3 parameters
removed, 4 return types changed
39. To what extentTestCareAssistant can
fix test cases automatically?
Results Total Repaired %
Test Cases 22 16 72
Compilation Errors 24 18 75
Values Initialized 36 29 80
• Repair 22 test cases of 6 open source systems
• Continuum, Geronimo, xml-security, PMD, POI, Shindig
• 24 compilation errors caused by different changes
• 9 parameter types changed, 8 parameters added, 3 parameters
removed, 4 return types changed
40. To what extentTestCareAssistant can
fix test cases automatically?
Results Total Repaired %
Test Cases 22 16 72
Compilation Errors 24 18 75
Values Initialized 36 29 80
• Repair 22 test cases of 6 open source systems
• Continuum, Geronimo, xml-security, PMD, POI, Shindig
• 24 compilation errors caused by different changes
• 9 parameter types changed, 8 parameters added, 3 parameters
removed, 4 return types changed
41. To what extentTestCareAssistant can
fix test cases automatically?
• Static data flow analysis not always effective
• Use of complex data structures, e.g. hash tables
• Changes in method logic
• Changes in interfaces
Results Total Repaired %
Test Cases 22 16 72
Compilation Errors 24 18 75
42. Conclusions
public class BankAccount {
public void deposit(int cents){
balance += cents;
}
}
public class BankAccount {
public void deposit(Money money){
balance += money.CentsValue;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals(500, account.getBalance());
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals(500, account.getBalance());
43. Conclusions
public class BankAccount {
public void deposit(int cents){
balance += cents;
}
}
public class BankAccount {
public void deposit(Money money){
balance += money.CentsValue;
}
}
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals(500, account.getBalance());
testDeposit(){
BankAccount account = new BankAccount();
Money amount = new Money(500);
account.deposit(amount);
assertEquals(500, account.getBalance());
44. Conclusions
public class BankAccount {
public void deposit(int cents){
balance += cents;
}
}
public class BankAccount {
public void deposit(Money money){
balance += money.CentsValue;
}
}
Replace:
int amount = 500;
with:
Money amount = new Money(500);
account.deposit(amount);
testDeposit(){
BankAccount account = new BankAccount();
int amount = 500;
account.deposit(amount);
assertEquals(500, account.getBalance());
testDeposit(){
BankAccount account = new BankAccount();
Money amount = new Money(500);
account.deposit(amount);
assertEquals(500, account.getBalance());
TestCareAssistant