Clean Code

Listing B-4 (continued)
BobsSerialDateTest.java

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378
Appendix B: 
org.jfree.date.SerialDate
252 assertEquals(97, leapYearCount(2301));
253 assertEquals(122, leapYearCount(2401));
254 }
255 
256 public void testLastDayOfMonth() throws Exception {
257 assertEquals(31, lastDayOfMonth(JANUARY, 1901));
258 assertEquals(28, lastDayOfMonth(FEBRUARY, 1901));
259 assertEquals(31, lastDayOfMonth(MARCH, 1901));
260 assertEquals(30, lastDayOfMonth(APRIL, 1901));
261 assertEquals(31, lastDayOfMonth(MAY, 1901));
262 assertEquals(30, lastDayOfMonth(JUNE, 1901));
263 assertEquals(31, lastDayOfMonth(JULY, 1901));
264 assertEquals(31, lastDayOfMonth(AUGUST, 1901));
265 assertEquals(30, lastDayOfMonth(SEPTEMBER, 1901));
266 assertEquals(31, lastDayOfMonth(OCTOBER, 1901));
267 assertEquals(30, lastDayOfMonth(NOVEMBER, 1901));
268 assertEquals(31, lastDayOfMonth(DECEMBER, 1901));
269 assertEquals(29, lastDayOfMonth(FEBRUARY, 1904));
270 }
271 
272 public void testAddDays() throws Exception {
273 SerialDate newYears = d(1, JANUARY, 1900);
274 assertEquals(d(2, JANUARY, 1900), addDays(1, newYears));
275 assertEquals(d(1, FEBRUARY, 1900), addDays(31, newYears));
276 assertEquals(d(1, JANUARY, 1901), addDays(365, newYears));
277 assertEquals(d(31, DECEMBER, 1904), addDays(5 * 365, newYears));
278 }
279 
280 private static SpreadsheetDate d(int day, int month, int year) {return new 
SpreadsheetDate(day, month, year);}
281 
282 public void testAddMonths() throws Exception {
283 assertEquals(d(1, FEBRUARY, 1900), addMonths(1, d(1, JANUARY, 1900)));
284 assertEquals(d(28, FEBRUARY, 1900), addMonths(1, d(31, JANUARY, 1900)));
285 assertEquals(d(28, FEBRUARY, 1900), addMonths(1, d(30, JANUARY, 1900)));
286 assertEquals(d(28, FEBRUARY, 1900), addMonths(1, d(29, JANUARY, 1900)));
287 assertEquals(d(28, FEBRUARY, 1900), addMonths(1, d(28, JANUARY, 1900)));
288 assertEquals(d(27, FEBRUARY, 1900), addMonths(1, d(27, JANUARY, 1900)));
289 
290 assertEquals(d(30, JUNE, 1900), addMonths(5, d(31, JANUARY, 1900)));
291 assertEquals(d(30, JUNE, 1901), addMonths(17, d(31, JANUARY, 1900)));
292 
293 assertEquals(d(29, FEBRUARY, 1904), addMonths(49, d(31, JANUARY, 1900)));
294 
295 }
296 
297 public void testAddYears() throws Exception {
298 assertEquals(d(1, JANUARY, 1901), addYears(1, d(1, JANUARY, 1900)));
299 assertEquals(d(28, FEBRUARY, 1905), addYears(1, d(29, FEBRUARY, 1904)));
300 assertEquals(d(28, FEBRUARY, 1905), addYears(1, d(28, FEBRUARY, 1904)));
301 assertEquals(d(28, FEBRUARY, 1904), addYears(1, d(28, FEBRUARY, 1903)));
302 }
303 
304 public void testGetPreviousDayOfWeek() throws Exception {
305 assertEquals(d(24, FEBRUARY, 2006), getPreviousDayOfWeek(FRIDAY, d(1, MARCH, 2006)));
306 assertEquals(d(22, FEBRUARY, 2006), getPreviousDayOfWeek(WEDNESDAY, d(1, MARCH, 2006)));
307 assertEquals(d(29, FEBRUARY, 2004), getPreviousDayOfWeek(SUNDAY, d(3, MARCH, 2004)));
308 assertEquals(d(29, DECEMBER, 2004), getPreviousDayOfWeek(WEDNESDAY, d(5, JANUARY, 2005)));
309 
310 try {
311 getPreviousDayOfWeek(-1, d(1, JANUARY, 2006));
312 fail("Invalid day of week code should throw exception");