/**
* check that the cache is immutable by changing the data passed in the constructor and returned
* from methods.
*
* @throws TimeStampedCacheException
*/
@Test
public void testImmutable() throws TimeStampedCacheException {
// setup
List<AbsoluteDate> actuals;
List<AbsoluteDate> expecteds = new ArrayList<AbsoluteDate>(data);
AbsoluteDate different = date.shiftedBy(-50);
// actions + verify
// check constructor
data.set(0, different);
Assert.assertArrayEquals(cache.getAll().toArray(), expecteds.toArray());
// check getAll
actuals = cache.getAll();
try {
actuals.set(0, different);
} catch (UnsupportedOperationException e) {
// exception ok
}
Assert.assertArrayEquals(cache.getAll().toArray(), expecteds.toArray());
// check getNeighbors
actuals = cache.getNeighbors(date);
try {
actuals.set(0, different);
} catch (UnsupportedOperationException e) {
// exception ok
}
Assert.assertArrayEquals(cache.getAll().toArray(), expecteds.toArray());
}
/** check {@link ImmutableTimeStampedCache#emptyCache()}. */
@Test
public void testEmptyCache() {
// setup
cache = ImmutableTimeStampedCache.emptyCache();
// actions + verify
try {
cache.getNeighbors(date);
Assert.fail("Expected Exception");
} catch (TimeStampedCacheException e) {
// expected
}
try {
cache.getEarliest();
Assert.fail("Expected Exception");
} catch (IllegalStateException e) {
// expected
}
try {
cache.getLatest();
Assert.fail("Expected Exception");
} catch (IllegalStateException e) {
// expected
}
Assert.assertEquals(cache.getAll().size(), 0);
Assert.assertEquals(cache.getNeighborsSize(), 0);
}
/**
* check {@link ImmutableTimeStampedCache#getNeighbors(AbsoluteDate)} at a series of different
* dates designed to test all logic paths.
*
* @throws TimeStampedCacheException
*/
@Test
public void testGetNeighbors() throws TimeStampedCacheException {
// setup
int size = data.size();
// actions + verify
// before fist data
try {
cache.getNeighbors(data.get(0).shiftedBy(-1));
Assert.fail("Expected Exception");
} catch (TimeStampedCacheException e) {
// expected
}
// on fist date
Assert.assertArrayEquals(
cache.getNeighbors(data.get(0)).toArray(), data.subList(0, 3).toArray());
// between fist and second date
Assert.assertArrayEquals(
cache.getNeighbors(data.get(0).shiftedBy(0.5)).toArray(), data.subList(0, 3).toArray());
// in the middle on a date
Assert.assertArrayEquals(
cache.getNeighbors(data.get(2)).toArray(), data.subList(1, 4).toArray());
// in the middle between dates
Assert.assertArrayEquals(
cache.getNeighbors(data.get(2).shiftedBy(0.5)).toArray(), data.subList(1, 4).toArray());
// just before last date
Assert.assertArrayEquals(
cache.getNeighbors(data.get(size - 1).shiftedBy(-0.5)).toArray(),
data.subList(size - 3, size).toArray());
// on last date
Assert.assertArrayEquals(
cache.getNeighbors(data.get(size - 1)).toArray(), data.subList(size - 3, size).toArray());
// after last date
try {
cache.getNeighbors(data.get(size - 1).shiftedBy(1));
Assert.fail("Expected Exception");
} catch (TimeStampedCacheException e) {
// expected
}
}