package org.junit.samples.money;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import junit.framework.JUnit4TestAdapter;
import junit.samples.money.IMoney;
import junit.samples.money.Money;
import junit.samples.money.MoneyBag;
import org.junit.Before;
import org.junit.Test;
public class MoneyTest {
private Money f12CHF;
private Money f14CHF;
private Money f7USD;
private Money f21USD;
private IMoney fMB1;
private IMoney fMB2;
public static junit.framework.Test suite() {
return new JUnit4TestAdapter(MoneyTest.class);
}
@Before
public void setUp() {
f12CHF = new Money(12, "CHF");
f14CHF = new Money(14, "CHF");
f7USD = new Money(7, "USD");
f21USD = new Money(21, "USD");
fMB1 = MoneyBag.create(f12CHF, f7USD);
fMB2 = MoneyBag.create(f14CHF, f21USD);
}
@Test
public void testBagMultiply() {
// {[12 CHF][7 USD]} *2 == {[24 CHF][14 USD]}
IMoney expected = MoneyBag.create(new Money(24, "CHF"), new Money(14, "USD"));
assertEquals(expected, fMB1.multiply(2));
assertEquals(fMB1, fMB1.multiply(1));
assertTrue(fMB1.multiply(0).isZero());
}
@Test
public void testBagNegate() {
// {[12 CHF][7 USD]} negate == {[-12 CHF][-7 USD]}
IMoney expected = MoneyBag.create(new Money(-12, "CHF"), new Money(-7, "USD"));
assertEquals(expected, fMB1.negate());
}
@Test
public void testBagSimpleAdd() {
// {[12 CHF][7 USD]} + [14 CHF] == {[26 CHF][7 USD]}
IMoney expected = MoneyBag.create(new Money(26, "CHF"), new Money(7, "USD"));
assertEquals(expected, fMB1.add(f14CHF));
}
@Test
public void testBagSubtract() {
// {[12 CHF][7 USD]} - {[14 CHF][21 USD] == {[-2 CHF][-14 USD]}
IMoney expected = MoneyBag.create(new Money(-2, "CHF"), new Money(-14, "USD"));
assertEquals(expected, fMB1.subtract(fMB2));
}
@Test
public void testBagSumAdd() {
// {[12 CHF][7 USD]} + {[14 CHF][21 USD]} == {[26 CHF][28 USD]}
IMoney expected = MoneyBag.create(new Money(26, "CHF"), new Money(28, "USD"));
assertEquals(expected, fMB1.add(fMB2));
}
@Test
public void testIsZero() {
assertTrue(fMB1.subtract(fMB1).isZero());
assertTrue(MoneyBag.create(new Money(0, "CHF"), new Money(0, "USD")).isZero());
}
@Test
public void testMixedSimpleAdd() {
// [12 CHF] + [7 USD] == {[12 CHF][7 USD]}
IMoney expected = MoneyBag.create(f12CHF, f7USD);
assertEquals(expected, f12CHF.add(f7USD));
}
@Test
public void testBagNotEquals() {
IMoney bag = MoneyBag.create(f12CHF, f7USD);
assertFalse(bag.equals(new Money(12, "DEM").add(f7USD)));
}
@Test
public void testMoneyBagEquals() {
assertTrue(!fMB1.equals(null));
assertEquals(fMB1, fMB1);
IMoney equal = MoneyBag.create(new Money(12, "CHF"), new Money(7, "USD"));
assertTrue(fMB1.equals(equal));
assertTrue(!fMB1.equals(f12CHF));
assertTrue(!f12CHF.equals(fMB1));
assertTrue(!fMB1.equals(fMB2));
}
@Test
public void testMoneyBagHash() {
IMoney equal = MoneyBag.create(new Money(12, "CHF"), new Money(7, "USD"));
assertEquals(fMB1.hashCode(), equal.hashCode());
}
@Test
public void testMoneyEquals() {
assertTrue(!f12CHF.equals(null));
Money equalMoney = new Money(12, "CHF");
assertEquals(f12CHF, f12CHF);
assertEquals(f12CHF, equalMoney);
assertEquals(f12CHF.hashCode(), equalMoney.hashCode());
assertTrue(!f12CHF.equals(f14CHF));
}
@Test
public void zeroMoniesAreEqualRegardlessOfCurrency() {
Money zeroDollars = new Money(0, "USD");
Money zeroFrancs = new Money(0, "CHF");
assertEquals(zeroDollars, zeroFrancs);
assertEquals(zeroDollars.hashCode(), zeroFrancs.hashCode());
}
@Test
public void testMoneyHash() {
assertTrue(!f12CHF.equals(null));
Money equal = new Money(12, "CHF");
assertEquals(f12CHF.hashCode(), equal.hashCode());
}
@Test
public void testSimplify() {
IMoney money = MoneyBag.create(new Money(26, "CHF"), new Money(28, "CHF"));
assertEquals(new Money(54, "CHF"), money);
}
@Test
public void testNormalize2() {
// {[12 CHF][7 USD]} - [12 CHF] == [7 USD]
Money expected = new Money(7, "USD");
assertEquals(expected, fMB1.subtract(f12CHF));
}
@Test
public void testNormalize3() {
// {[12 CHF][7 USD]} - {[12 CHF][3 USD]} == [4 USD]
IMoney ms1 = MoneyBag.create(new Money(12, "CHF"), new Money(3, "USD"));
Money expected = new Money(4, "USD");
assertEquals(expected, fMB1.subtract(ms1));
}
@Test
public void testNormalize4() { // [12 CHF] - {[12 CHF][3 USD]} == [-3 USD]
IMoney ms1 = MoneyBag.create(new Money(12, "CHF"), new Money(3, "USD"));
Money expected = new Money(-3, "USD");
assertEquals(expected, f12CHF.subtract(ms1));
}
@Test
public void testPrint() {
assertEquals("[12 CHF]", f12CHF.toString());
}
@Test
public void testSimpleAdd() {
// [12 CHF] + [14 CHF] == [26 CHF]
Money expected = new Money(26, "CHF");
assertEquals(expected, f12CHF.add(f14CHF));
}
@Test
public void testSimpleBagAdd() {
// [14 CHF] + {[12 CHF][7 USD]} == {[26 CHF][7 USD]}
IMoney expected = MoneyBag.create(new Money(26, "CHF"), new Money(7, "USD"));
assertEquals(expected, f14CHF.add(fMB1));
}
@Test
public void testSimpleMultiply() {
// [14 CHF] *2 == [28 CHF]
Money expected = new Money(28, "CHF");
assertEquals(expected, f14CHF.multiply(2));
}
@Test
public void testSimpleNegate() {
// [14 CHF] negate == [-14 CHF]
Money expected = new Money(-14, "CHF");
assertEquals(expected, f14CHF.negate());
}
@Test
public void testSimpleSubtract() {
// [14 CHF] - [12 CHF] == [2 CHF]
Money expected = new Money(2, "CHF");
assertEquals(expected, f14CHF.subtract(f12CHF));
}
}