use the exact naming convention for directories described by instructor

2 files changed, 167 insertions, 0 deletions

diff --git a/src/Q5/EmployeeSavings.java b/src/Q5/EmployeeSavings.java
new file mode 100644
index 0000000..44eac10
--- /dev/null
+++ b/src/Q5/EmployeeSavings.java
@@ -0,0 +1,84 @@
+package ca.mokhan.assignment1;
+
+import java.util.ArrayList;
+import java.util.Currency;
+import java.util.Locale;
+import java.util.Random;
+
+public class EmployeeSavings extends AddressBook {
+  private double accountValue;
+  private double[] monthlyInterests;
+  private double[] monthlySavings;
+  private double monthlyContribution;
+  public static final double ANNUAL_INTEREST_RATE = 0.05;
+
+  public EmployeeSavings(String firstName, String lastName) {
+    this(firstName, lastName, new Random().nextInt(800 - 100) + 100.0);
+  }
+
+  public EmployeeSavings(String firstName, String lastName, double monthlyContribution) {
+    super(firstName, "", lastName);
+    this.monthlyContribution = monthlyContribution;
+    this.accountValue = predictBalanceAfterMonths(12);
+  }
+
+  // what is d1, d2?
+  public EmployeeSavings(String firstName, String lastName, double[] d1, double[] d2) {
+    super(firstName, "", lastName);
+  }
+
+  public double getAccountValue() {
+    return this.accountValue;
+  }
+
+  public double[] getMonthlyInterests() {
+    return this.monthlyInterests;
+  }
+
+  public double[] getMonthlySavings() {
+    return this.monthlySavings;
+  }
+
+  public double[] calculateInterests() {
+    this.monthlyInterests = new double[12];
+    for (int i = 1; i <= 12; i++) this.monthlyInterests[i - 1] = predictInterestAfterMonths(i);
+    return this.monthlyInterests;
+  }
+
+  public double[] generateMonthlySavings() {
+    this.monthlySavings = new double[12];
+    for (int i = 1; i <= 12; i++) this.monthlySavings[i - 1] = predictBalanceAfterMonths(i);
+    return this.monthlySavings;
+  }
+
+  public double predictBalanceAfterMonths(int months) {
+    double monthlyRate = ANNUAL_INTEREST_RATE / 12.0;
+    double balance = 0;
+
+    for (int i = 0; i < months; i++)
+      balance = (balance + this.monthlyContribution) * (1 + monthlyRate);
+
+    return Math.round(balance * 1000) / 1000.0;
+  }
+
+  public double predictInterestAfterMonths(int months) {
+    return Math.round(
+            (predictBalanceAfterMonths(months) - (months * this.monthlyContribution)) * 1000)
+        / 1000.0;
+  }
+
+  public static String getReport(EmployeeSavings[] accounts) {
+    ArrayList<String> statement = new ArrayList<String>();
+
+    for (EmployeeSavings account : accounts) statement.add(account.toString());
+
+    return String.join(System.lineSeparator(), statement);
+  }
+
+  @Override
+  public String toString() {
+    Currency currency = Currency.getInstance(Locale.getDefault());
+    return String.format(
+        "%s %s%.2f", super.getFirstName(), currency.getSymbol(), this.getAccountValue());
+  }
+}
diff --git a/src/Q5/EmployeeSavingsTest.java b/src/Q5/EmployeeSavingsTest.java
new file mode 100644
index 0000000..5e9374b
--- /dev/null
+++ b/src/Q5/EmployeeSavingsTest.java
@@ -0,0 +1,83 @@
+package ca.mokhan.assignment1;
+
+import junit.framework.Test;
+import junit.framework.TestCase;
+import junit.framework.TestSuite;
+
+public class EmployeeSavingsTest extends TestCase {
+  private EmployeeSavings subject;
+
+  public EmployeeSavingsTest(String testName) {
+    super(testName);
+    double monthlyContribution = 100.00;
+    this.subject = new EmployeeSavings("Tsuyoshi", "Garrett", monthlyContribution);
+  }
+
+  public static Test suite() {
+    return new TestSuite(EmployeeSavingsTest.class);
+  }
+
+  public void testPredictSavingsAfter1Month() {
+    // Bankers rounding rules would round this amount down to $100.41
+    // the $0.007 would go to the bank.
+    assertEquals(100.417, subject.predictBalanceAfterMonths(1));
+    assertEquals(201.252, subject.predictBalanceAfterMonths(2));
+    assertEquals(302.507, subject.predictBalanceAfterMonths(3));
+  }
+
+  public void testPredictInterestAfter1Month() {
+    // Bankers rounding rules would round this amount down to $100.41
+    // the $0.007 would go to the bank.
+    assertEquals(0.417, subject.predictInterestAfterMonths(1));
+    assertEquals(1.252, subject.predictInterestAfterMonths(2));
+    assertEquals(2.507, subject.predictInterestAfterMonths(3));
+  }
+
+  public void testGetAccountValue() {
+    assertEquals(subject.predictBalanceAfterMonths(12), subject.getAccountValue());
+  }
+
+  public void testCalculateInterests() {
+    assertEquals(0.417, subject.calculateInterests()[0]);
+    assertEquals(1.252, subject.calculateInterests()[1]);
+    assertEquals(2.507, subject.calculateInterests()[2]);
+    assertEquals(4.184, subject.calculateInterests()[3]);
+    assertEquals(6.285, subject.calculateInterests()[4]);
+    assertEquals(8.811, subject.calculateInterests()[5]);
+    assertEquals(11.764, subject.calculateInterests()[6]);
+    assertEquals(15.147, subject.calculateInterests()[7]);
+    assertEquals(18.96, subject.calculateInterests()[8]);
+    assertEquals(23.206, subject.calculateInterests()[9]);
+    assertEquals(27.886, subject.calculateInterests()[10]);
+    assertEquals(33.002, subject.calculateInterests()[11]);
+  }
+
+  public void testGenerateMonthlySavings() {
+    assertEquals(100.417, subject.generateMonthlySavings()[0]);
+    assertEquals(201.252, subject.generateMonthlySavings()[1]);
+    assertEquals(302.507, subject.generateMonthlySavings()[2]);
+  }
+
+  public void testGetReport() {
+    EmployeeSavings[] accounts =
+        new EmployeeSavings[] {
+          new EmployeeSavings("Elena", "Brandon"),
+          new EmployeeSavings("Thomas", "Molson"),
+          new EmployeeSavings("Hamilton", "Winn"),
+          new EmployeeSavings("Suzie", "Sarandin"),
+          new EmployeeSavings("Philip", "Winne"),
+          new EmployeeSavings("Alex", "Trebok"),
+          new EmployeeSavings("Emma", "Pivoto"),
+          new EmployeeSavings("John", "Lenthen"),
+          new EmployeeSavings("James", "Lean"),
+          new EmployeeSavings("Jane", "Ostin"),
+          new EmployeeSavings("Emily", "Car"),
+          new EmployeeSavings("Daniel", "Hamshire"),
+          new EmployeeSavings("Neda", "Bazdar"),
+          new EmployeeSavings("Aaron", "Smith"),
+          new EmployeeSavings("Kate", "Hen")
+        };
+    String report = EmployeeSavings.getReport(accounts);
+    for (EmployeeSavings account : accounts) assertTrue(report.contains(account.getFirstName()));
+  }
+}