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import java.util.ArrayList;

import org.junit.Test;

import static org.junit.Assert.*;

public class LRUCacheTest {

private LRUCache c;

public LRUCacheTest() {

this.c = new LRUCache(2);

}

@Test

public void testCacheStartsEmpty() {

assertEquals(c.get(1), -1);

}

@Test

public void testSetBelowCapacity() {

c.set(1, 1);

assertEquals(c.get(1), 1);

assertEquals(c.get(2), -1);

c.set(2, 4);

assertEquals(c.get(1), 1);

assertEquals(c.get(2), 4);

}

@Test

public void testCapacityReachedOldestRemoved() {

c.set(1, 1);

c.set(2, 4);

c.set(3, 9);

assertEquals(c.get(1), -1);

assertEquals(c.get(2), 4);

assertEquals(c.get(3), 9);

}

@Test

public void testGetRenewsEntry() {

c.set(1, 1);

c.set(2, 4);

assertEquals(c.get(1), 1);

c.set(3, 9);

assertEquals(c.get(1), 1);

assertEquals(c.get(2), -1);

assertEquals(c.get(3), 9);

}

}