jaroslav@60
|
1 |
package org.apidesign.apifest08.test;
|
jaroslav@60
|
2 |
|
jaroslav@60
|
3 |
import java.util.Date;
|
jaroslav@60
|
4 |
import junit.framework.TestCase;
|
jaroslav@60
|
5 |
import org.apidesign.apifest08.currency.Convertor;
|
jaroslav@60
|
6 |
|
jaroslav@60
|
7 |
/** The exchange rates are not always the same. They are changing. However
|
jaroslav@60
|
8 |
* as in order to predict the future, one needs to understand own past. That is
|
jaroslav@60
|
9 |
* why it is important to know the exchange rate as it was at any time during
|
jaroslav@60
|
10 |
* the past.
|
jaroslav@60
|
11 |
* <p>
|
jaroslav@60
|
12 |
* Today's quest is to enhance the convertor API to deal with dates.
|
jaroslav@60
|
13 |
* One shall be able to convert a currency at any date. Each currencies rate shall
|
jaroslav@60
|
14 |
* be associated with a range between two Date objects. In order
|
jaroslav@60
|
15 |
* to keep compatibility with old API that knew nothing about dates, the
|
jaroslav@60
|
16 |
* rates associated then are applicable "for eternity". Any use of existing
|
jaroslav@60
|
17 |
* convert methods that do not accept a Date argument, uses the current
|
jaroslav@60
|
18 |
* System.currentTimeMillis() as default date.
|
jaroslav@60
|
19 |
*/
|
jaroslav@60
|
20 |
public class Task4Test extends TestCase {
|
jaroslav@60
|
21 |
public Task4Test(String testName) {
|
jaroslav@60
|
22 |
super(testName);
|
jaroslav@60
|
23 |
}
|
jaroslav@60
|
24 |
|
jaroslav@60
|
25 |
@Override
|
jaroslav@60
|
26 |
protected void setUp() throws Exception {
|
jaroslav@60
|
27 |
}
|
jaroslav@60
|
28 |
|
jaroslav@60
|
29 |
@Override
|
jaroslav@60
|
30 |
protected void tearDown() throws Exception {
|
jaroslav@60
|
31 |
}
|
jaroslav@60
|
32 |
|
jaroslav@60
|
33 |
// Backward compatibly enhance your existing API to support following
|
jaroslav@60
|
34 |
// usecases:
|
jaroslav@60
|
35 |
//
|
jaroslav@60
|
36 |
|
jaroslav@60
|
37 |
/** Takes a convertor with any rates associated and creates new convertor
|
jaroslav@60
|
38 |
* that returns the same values as the old one for time between from to till.
|
jaroslav@60
|
39 |
* Otherwise it returns no results. This is just a helper method that
|
jaroslav@60
|
40 |
* shall call some real one in the API.
|
jaroslav@60
|
41 |
*
|
jaroslav@60
|
42 |
* @param old existing convertor
|
jaroslav@60
|
43 |
* @param from initial date (inclusive)
|
jaroslav@60
|
44 |
* @param till final date (exclusive)
|
jaroslav@60
|
45 |
* @return new convertor
|
jaroslav@60
|
46 |
*/
|
jaroslav@60
|
47 |
public static Convertor limitTo(Convertor old, Date from, Date till) {
|
jaroslav@60
|
48 |
return null;
|
jaroslav@60
|
49 |
}
|
jaroslav@60
|
50 |
|
jaroslav@60
|
51 |
|
jaroslav@60
|
52 |
public void testCompositionOfLimitedConvertors() throws Exception {
|
jaroslav@60
|
53 |
if (Boolean.getBoolean("ignore.failing")) {
|
jaroslav@60
|
54 |
// implement me! then delete this if statement
|
jaroslav@60
|
55 |
return;
|
jaroslav@60
|
56 |
}
|
jaroslav@60
|
57 |
|
jaroslav@60
|
58 |
Date d1 = null; // 2008-10-01 0:00 GMT
|
jaroslav@60
|
59 |
Date d2 = null; // 2008-10-02 0:00 GMT
|
jaroslav@60
|
60 |
Date d3 = null; // 2008-10-03 0:00 GMT
|
jaroslav@60
|
61 |
|
jaroslav@60
|
62 |
Convertor c = Task2Test.merge(
|
jaroslav@60
|
63 |
limitTo(Task1Test.createCZKtoUSD(), d1, d2),
|
jaroslav@60
|
64 |
limitTo(Task1Test.createSKKtoCZK(), d2, d3)
|
jaroslav@60
|
65 |
);
|
jaroslav@60
|
66 |
|
jaroslav@60
|
67 |
// convert $5 to CZK using c:
|
jaroslav@60
|
68 |
// cannot convert as no rate is applicable to current date
|
jaroslav@60
|
69 |
|
jaroslav@60
|
70 |
// convert $8 to CZK using c:
|
jaroslav@60
|
71 |
// cannot convert as no rate is applicable to current date
|
jaroslav@60
|
72 |
|
jaroslav@60
|
73 |
// convert 1003CZK to USD using c:
|
jaroslav@60
|
74 |
// cannot convert as no rate is applicable to current date
|
jaroslav@60
|
75 |
|
jaroslav@60
|
76 |
// convert 16CZK using c:
|
jaroslav@60
|
77 |
// cannot convert as no rate is applicable to current date
|
jaroslav@60
|
78 |
|
jaroslav@60
|
79 |
// convert 500SKK to CZK using c:
|
jaroslav@60
|
80 |
// cannot convert as no rate is applicable to current date
|
jaroslav@60
|
81 |
|
jaroslav@60
|
82 |
// convert $5 to CZK using c at 2008-10-01 6:00 GMT:
|
jaroslav@60
|
83 |
// assertEquals("Result is 85 CZK");
|
jaroslav@60
|
84 |
|
jaroslav@60
|
85 |
// convert $8 to CZK using c at 2008-10-01 6:00 GMT:
|
jaroslav@60
|
86 |
// assertEquals("Result is 136 CZK");
|
jaroslav@60
|
87 |
|
jaroslav@60
|
88 |
// convert 1003CZK to USD using c at 2008-10-01 6:00 GMT:
|
jaroslav@60
|
89 |
// assertEquals("Result is 59 USD");
|
jaroslav@60
|
90 |
|
jaroslav@60
|
91 |
// convert 16CZK using c at 2008-10-02 9:00 GMT:
|
jaroslav@60
|
92 |
// assertEquals("Result is 20 SKK");
|
jaroslav@60
|
93 |
|
jaroslav@60
|
94 |
// convert 500SKK to CZK using c at 2008-10-02 9:00 GMT:
|
jaroslav@60
|
95 |
// assertEquals("Result is 400 CZK");
|
jaroslav@60
|
96 |
|
jaroslav@60
|
97 |
// convert 500SKK to CZK using c at 2008-10-01 6:00 GMT:
|
jaroslav@60
|
98 |
// cannot convert as no rate is applicable to current date
|
jaroslav@60
|
99 |
}
|
jaroslav@60
|
100 |
|
jaroslav@60
|
101 |
/** Create convertor that understands two currencies, CZK and
|
jaroslav@60
|
102 |
* SKK. Make 100 SKK == 90 CZK.
|
jaroslav@60
|
103 |
*
|
jaroslav@60
|
104 |
* @return prepared convertor ready for converting SKK to CZK and CZK to SKK
|
jaroslav@60
|
105 |
*/
|
jaroslav@60
|
106 |
public static Convertor createSKKtoCZK2() {
|
jaroslav@60
|
107 |
return null;
|
jaroslav@60
|
108 |
}
|
jaroslav@60
|
109 |
|
jaroslav@60
|
110 |
public void testDateConvetorWithTwoDifferentRates() throws Exception {
|
jaroslav@60
|
111 |
if (Boolean.getBoolean("ignore.failing")) {
|
jaroslav@60
|
112 |
// implement me! then delete this if statement
|
jaroslav@60
|
113 |
return;
|
jaroslav@60
|
114 |
}
|
jaroslav@60
|
115 |
|
jaroslav@60
|
116 |
Date d1 = null; // 2008-10-01 0:00 GMT
|
jaroslav@60
|
117 |
Date d2 = null; // 2008-10-02 0:00 GMT
|
jaroslav@60
|
118 |
Date d3 = null; // 2008-10-03 0:00 GMT
|
jaroslav@60
|
119 |
|
jaroslav@60
|
120 |
Convertor c = Task2Test.merge(
|
jaroslav@60
|
121 |
limitTo(createSKKtoCZK2(), d1, d2),
|
jaroslav@60
|
122 |
limitTo(Task1Test.createSKKtoCZK(), d2, d3)
|
jaroslav@60
|
123 |
);
|
jaroslav@60
|
124 |
|
jaroslav@60
|
125 |
// convert 500SKK to CZK using c at 2008-10-02 9:00 GMT:
|
jaroslav@60
|
126 |
// assertEquals("Result is 400 CZK");
|
jaroslav@60
|
127 |
|
jaroslav@60
|
128 |
// convert 500SKK to CZK using c at 2008-10-01 6:00 GMT:
|
jaroslav@60
|
129 |
// assertEquals("Result is 450 CZK");
|
jaroslav@60
|
130 |
}
|
jaroslav@60
|
131 |
|
jaroslav@60
|
132 |
}
|