Clean Code

Appendix B: 
org.jfree.date.SerialDate
63 /**
64 * Some JUnit tests for the {@link SerialDate} class.
65 */
66 public class SerialDateTests extends TestCase {
67 
68 /** Date representing November 9. */
69 private SerialDate nov9Y2001;
70 
71 /**
72 * Creates a new test case.
73 *
74 * @param name the name.
75 */
76 public SerialDateTests(final String name) {
77 super(name);
78 }
79 
80 /**
81 * Returns a test suite for the JUnit test runner.
82 *
83 * @return The test suite.
84 */
85 public static Test suite() {
86 return new TestSuite(SerialDateTests.class);
87 }
88 
89 /**
90 * Problem set up.
91 */
92 protected void setUp() {
93 this.nov9Y2001 = SerialDate.createInstance(9, MonthConstants.NOVEMBER, 2001);
94 }
95 
96 /**
97 * 9 Nov 2001 plus two months should be 9 Jan 2002.
98 */
99 public void testAddMonthsTo9Nov2001() {
100 final SerialDate jan9Y2002 = SerialDate.addMonths(2, this.nov9Y2001);
101 final SerialDate answer = SerialDate.createInstance(9, 1, 2002);
102 assertEquals(answer, jan9Y2002);
103 }
104 
105 /**
106 * A test case for a reported bug, now fixed.
107 */
108 public void testAddMonthsTo5Oct2003() {
109 final SerialDate d1 = SerialDate.createInstance(5, MonthConstants.OCTOBER, 2003);
110 final SerialDate d2 = SerialDate.addMonths(2, d1);
111 assertEquals(d2, SerialDate.createInstance(5, MonthConstants.DECEMBER, 2003));
112 }
113 
114 /**
115 * A test case for a reported bug, now fixed.
116 */
117 public void testAddMonthsTo1Jan2003() {
118 final SerialDate d1 = SerialDate.createInstance(1, MonthConstants.JANUARY, 2003);
119 final SerialDate d2 = SerialDate.addMonths(0, d1);
120 assertEquals(d2, d1);
121 }
122 
123 /**
124 * Monday preceding Friday 9 November 2001 should be 5 November.