@Test
public void shouldReturnMinusOneWhenNotFoundTest() {
LRUCache cache = new LRUCache(5);
cache.set(1, 1);
int expected = -1;
int actual = cache.get(2);
assertEquals(expected, actual);
}
@Test
public void shouldReturnValueWhenCallGetWithKeyTest() {
LRUCache cacheOneElement = new LRUCache(5);
cacheOneElement.set(1, 1);
int expected = 1;
int actual = cacheOneElement.get(1);
assertEquals(expected, actual);
}
@Test
public void shouldReturnMinusOneAfterLatestKeyGetTest() {
LRUCache cache = new LRUCache(5);
cache.set(1, 1);
cache.set(2, 2);
cache.set(3, 3);
cache.set(4, 4);
cache.set(5, 5);
cache.set(6, 6);
int expected = -1;
int actual = cache.get(1);
assertEquals(expected, actual);
}
@Test
public void shouldReturnMinusOneAfterAllKeysShiftingTest() {
LRUCache cache = new LRUCache(4);
cache.set(1, 1);
cache.set(2, 2);
cache.set(3, 3);
cache.set(4, 4);
cache.get(1);
cache.get(2);
cache.get(3);
cache.set(5, 5);
int expected = -1;
int actual = cache.get(4);
assertEquals(expected, actual);
}
