Tims commits to do deposit and withdrawal

src/main/java/org/xpdojo/bank/Account.java

@@ -1,4 +1,21 @@
 package org.xpdojo.bank;
 
 public class Account {
+
+    public int balance;
+
+    public void deposit(int i) {
+        balance += i;
+    }
+
+    public void withdraw(int i) {
+        balance -= i;
+    }
+
+    public void transfer(int transferAmount, Account receivingAccount) {
+        if (transferAmount <= balance) {
+            this.withdraw(transferAmount);
+            receivingAccount.deposit(transferAmount);
+        }
+    }
 }

src/test/java/org/xpdojo/bank/AccountTest.java

@@ -9,8 +9,54 @@
 public class AccountTest {
 
     @Test
-	@Ignore
+	//@Ignore
     public void depositAnAmountToIncreaseTheBalance() {
-        assertThat("your first test isn't implemented", true, is(false));
+        //assertThat("your first test isn't implemented", true, is(false));
+        //arrange
+        Account account = new Account();
+
+        //act (add some money)
+        account.deposit(100);
+        //assert
+        assertThat(account.balance, is(100));
+    }
+
+    @Test
+    public void startingBalanceIsZero() {
+        Account account = new Account();
+        assertThat(account.balance, is(0));
+    }
+
+    @Test
+    public void depositingMultipleAmounts() {
+        Account account = new Account();
+        account.deposit(100);
+        account.deposit(300);
+        assertThat(account.balance, is(400));
+    }
+
+    @Test
+    public void withdrawAnAmount() {
+        Account account = new Account();
+        account.withdraw(100);
+        assertThat(account.balance, is(-100));
+    }
+
+    @Test
+    public void depositAndWithdrawAnAmount() {
+        Account account = new Account();
+        account.deposit(400);
+        account.withdraw(100);
+        assertThat(account.balance, is(300));
+    }
+
+    @Test
+    public void transferAnAmountFromOneAccountToAnother() {
+        Account account1 = new Account(), account2 = new Account();
+        account1.deposit(100);
+        account1.transfer(100, account2);
+        assertThat(account1.balance, is(0));
+        assertThat(account2.balance, is(100));
+
     }
 }