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之后，我们创建一个junit测试代码MoneyTest.java，来测试Money.java和MoneyBag.java类，这里我也把它放在src目录下；如果企业应用，你就要把目录分析的详细些，例如src子目录下放所有的源代码，子目录下放所有的junit测试代码：x

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3GW4cQ}:{~5{FD0import junit.framework.*;51Testing软件测试网5Ec/F3Frd51Testing软件测试网%i%Zz"P{W-r

public class MoneyTest extends TestCase {tE&\^F]"E0

{edUO l4X,|z0private Money f12CHF;^;Pb2g^-v0

s5~s$h6L3\f4TE0private Money f14CHF;C`8\S9`tY0

\la,Q6\-zt8p0private Money f7USD;g xqX5ND'c*`0U051Testing软件测试网%\$I@!drtm$s%@w

private Money f21USD;Lo X8S[h%Au051Testing软件测试网q"OmFD&i4a

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^ClXI5eO Z0private IMoney fMB1;6l@zE6txnC+f0

1zL'}&u0Ht"O2F-`G],L0private IMoney fMB2;51Testing软件测试网8s7`z p)K5t8D51Testing软件测试网Gf:d$B!p*p

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public static void main(String args[]) {51Testing软件测试网0u^1Nm!m51Testing软件测试网rS7k|R

junit.textui.TestRunner.run(MoneyTest.class);51Testing软件测试网#s8wWnH_Q8b

,sH'G%_"{,X[$C0}51Testing软件测试网1E5jmx5B+IdkH

9jOx-[2V"T(C$r0protected void setUp() {6OE!B`3u^ S'D*wV0

:[z!kl`O0f12CHF= new Money(12, "CHF");ly4Z.`h&\7@,T051Testing软件测试网jWbT2hkM

f14CHF= new Money(14, "CHF");51Testing软件测试网u&@+j["Z{}i51Testing软件测试网eCE:TY

f7USD= new Money( 7, "USD");51Testing软件测试网0C2gCs8xm{

n2m"Wh9[4`q0f21USD= new Money(21, "USD");g!?P~$jgj051Testing软件测试网d^$D*Hs

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~0fMB1= MoneyBag.create(f12CHF, f7USD);51Testing软件测试网E3K1t'I;r0`a Q

?`8L!MAn0fMB2= MoneyBag.create(f14CHF, f21USD);51Testing软件测试网5F"r)Go0tLA"|

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%_:t5M C2{p%Y4``0K\"x0public void testBagMultiply() {b{J4CQ(CZ0

S rhZQ-J~0// {[12 CHF][7 USD]} *2 == {[24 CHF][14 USD]}51Testing软件测试网Xt:NOa

jzn0xnp7rz@0IMoney expected= MoneyBag.create(new Money(24, "CHF"), new Money(14, "USD"));4oEa0XY\-i051Testing软件测试网$PPSutc

assertEquals(expected, fMB1.multiply(2));51Testing软件测试网r%`4Nn!hS

/H.kP@e#]/Qu0assertEquals(fMB1, fMB1.multiply(1));8W.NV_8H0

+J0uau$B:w\-x5_ r0assertTrue(fMB1.multiply(0).isZero());j-nt2k)JkN2]0

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j a8y\5vd0G0public void testBagNegate() {saQy%aE&w0

kOB!Z^g&E0// {[12 CHF][7 USD]} negate == {[-12 CHF][-7 USD]}XIN2GY*`051Testing软件测试网T6^+?E?SQa

IMoney expected= MoneyBag.create(new Money(-12, "CHF"), new Money(-7, "USD"));|*KA:b"]s#^051Testing软件测试网^ENZCHxb

assertEquals(expected, fMB1.negate());qei)td m:hiX051Testing软件测试网(A+l)A'A2bO1pv

}51Testing软件测试网X G)q*vLu

]#Ek@6i0public void testBagSimpleAdd() {51Testing软件测试网 k_a.Q+J;I

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e0]:Tz7}}0// {[12 CHF][7 USD]} + [14 CHF] == {[26 CHF][7 USD]}51Testing软件测试网%XA[K$uL+e&Y51Testing软件测试网0ERWv2gt,]C8\:}

IMoney expected= MoneyBag.create(new Money(26, "CHF"), new Money(7, "USD"));3ikSpk!f0

Nb-R~ ?9~.Bj0assertEquals(expected, fMB1.add(f14CHF));51Testing软件测试网0lFb

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}51Testing软件测试网$BGX2?1a0P

I;P`"B1a"h'iy0public void testBagSubtract() {51Testing软件测试网^+D4^/yi-G7Pu51Testing软件测试网F"l.e;]GL

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// {[12 CHF][7 USD]} - {[14 CHF][21 USD] == {[-2 CHF][-14 USD]}mMHXAcOO/b051Testing软件测试网,g7dG!J.Kz0I*}2k

IMoney expected= MoneyBag.create(new Money(-2, "CHF"), new Money(-14, "USD"));;hL*e"J'k0j;}~,cV051Testing软件测试网0HY _|3{y

assertEquals(expected, fMB1.subtract(fMB2));s,y;PA%X3v:J_+^0

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public void testBagSumAdd() {'U2A4l.{g!r9y051Testing软件测试网N*h Ak%q"j!C

// {[12 CHF][7 USD]} + {[14 CHF][21 USD]} == {[26 CHF][28 USD]}"^-aK&Y1s[DY

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Y9k%BY9Z qT`)z l0IMoney expected= MoneyBag.create(new Money(26, "CHF"), new Money(28, "USD"));jD o(V3BXw0

Cm{-U;J,c.k{0assertEquals(expected, fMB1.add(fMB2));51Testing软件测试网 x A$mr'mR|%a51Testing软件测试网MU G+cD

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public void testIsZero() {Q j'fF9ml0