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mlengenvs.featuresnap

Banking Kata - Java

Code

Diff

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Account {

    LocalDateTime lastTransactionDate = LocalDateTime.of(1900,1,1,1,1);
    int lastTransactionAmount = 0;
    int lastTransactionBalance = 0;
    private String statement = "Date Amount Balance" + "\n";
    private static final String DATE_FORMATTER= "dd-MM-yyyy";
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern(DATE_FORMATTER);


    public String printStatement() {
      if(this.lastTransactionBalance < 0){
        return this.statement + "\n Failed: Insufficient Funds";
      } else if(this.lastTransactionAmount <= 0){
        return this.statement + "Failed: Negative Transaction";
      }
        return this.statement + "\n" + lastTransactionDate.format(formatter) + " " + lastTransactionAmount + " " + lastTransactionBalance;
    }

    public void deposit(int amount){
        this.lastTransactionBalance += amount;
        this.lastTransactionAmount = amount;
        this.lastTransactionDate = LocalDateTime.now();;
    }
  
  public void withdraw(int amount){
    this.lastTransactionBalance -= amount;
    this.lastTransactionAmount = amount;
    this.lastTransactionDate = LocalDateTime.now();
  }
}

- import java.time.LocalDateTime;
- import java.time.format.DateTimeFormatter;
- public class Account {
- LocalDateTime lastTransactionDate = LocalDateTime.of(1900,1,1,1,1);
- int lastTransactionAmount = 0;
- int lastTransactionBalance = 0;
- private String statement = "Date Amount Balance" + "\n";
- private static final String DATE_FORMATTER= "dd-MM-yyyy";
- DateTimeFormatter formatter = DateTimeFormatter.ofPattern(DATE_FORMATTER);
- public String printStatement() {
- if(this.lastTransactionBalance < 0){
- return this.statement + "\n Failed: Insufficient Funds";
- } else if(this.lastTransactionAmount <= 0){
- return this.statement + "Failed: Negative Transaction";
- }
- return this.statement + "\n" + lastTransactionDate.format(formatter) + " " + lastTransactionAmount + " " + lastTransactionBalance;
- }
- public void deposit(int amount){
- this.lastTransactionBalance += amount;
- this.lastTransactionAmount = amount;
- this.lastTransactionDate = LocalDateTime.now();;
- }
- ~~public String printStatement() {~~
- return "Date Amount Balance" + "\n" + "31.10.2022 " + "400 " + "400";
- public void withdraw(int amount){
- this.lastTransactionBalance -= amount;
- this.lastTransactionAmount = amount;
- this.lastTransactionDate = LocalDateTime.now();
- }
- ~~public void deposit(int amount){};~~
- }

Test Cases

Diff

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

// TODO: Replace examples and use TDD by writing your own tests

class SolutionTest {
    @Test
    void printStatement_displays_column_headings() {
        Account account = new Account();
        String statement = account.printStatement();
        String[] rows = statement.split("\\n");
        String[] columns= rows[0].split("\\s");
        String[] expectedColumns = "Date Amount Balance".split(" ");
        assertArrayEquals(expectedColumns, columns);
     }
  
  @Test
  void depositAmountIsDisplayedOnStatement(){
    Account account = new Account();
    account.deposit(500);
    String testStatement = account.printStatement();
    String[] lines = testStatement.split("\n");
    StatementLine line = parseStatementLine(lines[lines.length - 1]);
    assertEquals(500, line.amount());
  }
  
   @Test
  void depositAmountIsAddedToAccountBalance(){
    Account account = new Account();
    account.deposit(500);
    String testStatement = account.printStatement();
    String[] lines = testStatement.split("\n");
    StatementLine line = parseStatementLine(lines[lines.length - 1]);
    assertEquals(500, line.balance());
  }
  
  @Test
  void depositDateIsDisplayedOnStatment(){
    String DATE_FORMATTER= "dd-MM-yyyy";
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern(DATE_FORMATTER);
    Account account = new Account();
    account.deposit(500);
    String testStatement = account.printStatement();
    String[] lines = testStatement.split("\n");
    StatementLine line = parseStatementLine(lines[lines.length - 1]);
    assertEquals(LocalDateTime.now().format(formatter), line.date());
  }
  
  
  @Test
  void withdrawalAmountIsDisplayedOnStatement(){
    Account account = new Account();
    account.deposit(500);
    account.withdraw(100);
    String testStatement = account.printStatement();
    String[] lines = testStatement.split("\n");
    StatementLine line = parseStatementLine(lines[lines.length - 1]);
    assertEquals(100, line.amount());
  }
  
  @Test
  void withdrawalAmountIsSubtractedFromAccountBalance(){
    Account account = new Account();
    account.deposit(500);
    account.withdraw(100);
    String testStatement = account.printStatement();
    String[] lines = testStatement.split("\n");
    StatementLine line = parseStatementLine(lines[lines.length - 1]);
    assertEquals(400, line.balance());
  }
  
  @Test
  void withdrawalDateIsDisplayedOnStatment(){
    String DATE_FORMATTER= "dd-MM-yyyy";
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern(DATE_FORMATTER);
    Account account = new Account();
    account.lastTransactionBalance = 100;
    account.withdraw(100);
    String testStatement = account.printStatement();
    String[] lines = testStatement.split("\n");
    StatementLine line = parseStatementLine(lines[lines.length - 1]);
    assertEquals(LocalDateTime.now().format(formatter), line.date());
  }
  
  @Test 
  public void cannotOverdrawAccount(){
    
  }
  
  //test helper method
 
  private StatementLine parseStatementLine(String statementLine) {
    String[] lineContents = statementLine.trim().split("\\s");
    String date = lineContents[0];
    int amount = Integer.parseInt(lineContents[1]);
    int balance = Integer.parseInt(lineContents[2]);
    return new StatementLine(date, amount, balance);
  }
  private record StatementLine(String date, int amount, int balance){}
}

- import org.junit.jupiter.api.Test;
- import static org.junit.jupiter.api.Assertions.assertEquals;
- import static org.junit.jupiter.api.Assertions.assertTrue;
- import static org.junit.jupiter.api.Assertions.assertArrayEquals;
- import java.time.LocalDateTime;
- import java.time.format.DateTimeFormatter;
- // TODO: Replace examples and use TDD by writing your own tests
- class SolutionTest {
- @Test
- void printStatement_displays_column_headings() {
- Account account = new Account();
- String statement = account.printStatement();
- String[] rows = statement.split("\\n");
- String[] columns= rows[0].split("\\s");
- String[] expectedColumns = "Date Amount Balance".split(" ");
- assertArrayEquals(expectedColumns, columns);
- }
- @Test
- void depositAmountIsDisplayedOnStatement(){
- Account account = new Account();
- ~~account.deposit(400);~~
- account.deposit(500);
- String testStatement = account.printStatement();
- String[] lines = testStatement.split("\n");
- ~~StatementLine line = parseStatementLine(lines[1]);~~
- ~~assertEquals(400, line.amount());~~
- StatementLine line = parseStatementLine(lines[lines.length - 1]);
- assertEquals(500, line.amount());
- }
- @Test
- void depositAmountIsAddedToAccountBalance(){
- Account account = new Account();
- account.deposit(500);
- String testStatement = account.printStatement();
- String[] lines = testStatement.split("\n");
- StatementLine line = parseStatementLine(lines[lines.length - 1]);
- assertEquals(500, line.balance());
- }
- @Test
- void depositDateIsDisplayedOnStatment(){
- String DATE_FORMATTER= "dd-MM-yyyy";
- DateTimeFormatter formatter = DateTimeFormatter.ofPattern(DATE_FORMATTER);
- Account account = new Account();
- account.deposit(500);
- String testStatement = account.printStatement();
- String[] lines = testStatement.split("\n");
- StatementLine line = parseStatementLine(lines[lines.length - 1]);
- assertEquals(LocalDateTime.now().format(formatter), line.date());
- }
- @Test
- void withdrawalAmountIsDisplayedOnStatement(){
- Account account = new Account();
- account.deposit(500);
- account.withdraw(100);
- String testStatement = account.printStatement();
- String[] lines = testStatement.split("\n");
- StatementLine line = parseStatementLine(lines[lines.length - 1]);
- assertEquals(100, line.amount());
- }
- @Test
- void withdrawalAmountIsSubtractedFromAccountBalance(){
- Account account = new Account();
- account.deposit(500);
- account.withdraw(100);
- String testStatement = account.printStatement();
- String[] lines = testStatement.split("\n");
- StatementLine line = parseStatementLine(lines[lines.length - 1]);
- assertEquals(400, line.balance());
- }
- @Test
- void withdrawalDateIsDisplayedOnStatment(){
- String DATE_FORMATTER= "dd-MM-yyyy";
- DateTimeFormatter formatter = DateTimeFormatter.ofPattern(DATE_FORMATTER);
- Account account = new Account();
- account.lastTransactionBalance = 100;
- account.withdraw(100);
- String testStatement = account.printStatement();
- String[] lines = testStatement.split("\n");
- StatementLine line = parseStatementLine(lines[lines.length - 1]);
- assertEquals(LocalDateTime.now().format(formatter), line.date());
- }
- @Test
- public void cannotOverdrawAccount(){
- }
- //test helper method
- private StatementLine parseStatementLine(String statementLine) {
- String[] lineContents = statementLine.trim().split("\\s");
- String date = lineContents[0];
- int amount = Integer.parseInt(lineContents[1]);
- int balance = Integer.parseInt(lineContents[2]);
- return new StatementLine(date, amount, balance);
- }
- private record StatementLine(String date, int amount, int balance){}
- }

mlengenvs.featuresnap

Banking Kata - Java

Code

Diff

public class Account {
  
  public String printStatement() {
    return "Date Amount Balance" + "\n" + "31.10.2022 " + "400 " + "400";
  }
  
   public void deposit(int amount){};
}

- public class Account {
- public String printStatement() {
- ~~return "Date Amount Balance";~~
- return "Date Amount Balance" + "\n" + "31.10.2022 " + "400 " + "400";
- }
- public void deposit(int amount){};
- }

Test Cases

Diff

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;

// TODO: Replace examples and use TDD by writing your own tests

class SolutionTest {
    @Test
    void printStatement_displays_column_headings() {
        Account account = new Account();
        String statement = account.printStatement();
        String[] rows = statement.split("\\n");
        String[] columns= rows[0].split("\\s");
        String[] expectedColumns = "Date Amount Balance".split(" ");
        assertArrayEquals(expectedColumns, columns);
     }
  
  @Test
  void depositAmountIsDisplayedOnStatement(){
    Account account = new Account();
    account.deposit(400);
    String testStatement = account.printStatement();
    assertEquals("Date Amount Balance\n31.10.2022 400 400", testStatement);
  }
}

- import org.junit.jupiter.api.Test;
- import static org.junit.jupiter.api.Assertions.assertEquals;
- import static org.junit.jupiter.api.Assertions.assertTrue;
- import static org.junit.jupiter.api.Assertions.assertArrayEquals;
- // TODO: Replace examples and use TDD by writing your own tests
- class SolutionTest {
- @Test
- void printStatement_displays_column_headings() {
- Account account = new Account();
- String statement = account.printStatement();
- ~~String[] columns= statement.split("(\\s)+");~~
- String[] rows = statement.split("\\n");
- String[] columns= rows[0].split("\\s");
- String[] expectedColumns = "Date Amount Balance".split(" ");
- assertArrayEquals(expectedColumns, columns);
- }
- @Test
- void depositAmountIsDisplayedOnStatement(){
- Account account = new Account();
- account.deposit(400);
- String testStatement = account.printStatement();
- assertEquals("Date Amount Balance\n31.10.2022 400 400", testStatement);
- }
- }

Banking Kata - Java

Banking Kata - Java

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