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ExpiringMapTest.java
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ExpiringMapTest.java
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package net.jodah.expiringmap;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertNotNull;
import static org.testng.Assert.assertNull;
import static org.testng.Assert.assertTrue;
import java.util.Arrays;
import java.util.Collection;
import java.util.ConcurrentModificationException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
/**
* Tests {@link ExpiringMap}.
* <p>
* See the net.jodah.expiringmap.functional package for testing of specific features and scenarios.
*/
@Test
public class ExpiringMapTest {
@BeforeMethod
protected void beforeMethod() {
ExpiringMap.THREAD_FACTORY = null;
}
/**
* Tests {@link ExpiringMap#addAsyncExpirationListener(ExpirationListener)}.
*/
public void testAddAndGetAsyncExpirationListener() {
// Given
ExpiringMap<String, String> map = ExpiringMap.create();
ExpirationListener<String, String> listener1 = (k, v) -> {
};
ExpirationListener<String, String> listener2 = (k, v) -> {
};
// When
map.addAsyncExpirationListener(listener1);
map.addAsyncExpirationListener(listener2);
// Then
assertEquals(listener1, map.asyncExpirationListeners.get(0));
assertEquals(listener2, map.asyncExpirationListeners.get(1));
}
/**
* Tests {@link ExpiringMap#addExpirationListener(ExpirationListener)}.
*/
public void testAddExpirationListener() {
// Given
ExpiringMap<String, String> map = ExpiringMap.create();
ExpirationListener<String, String> listener1 = (k, v) -> {
};
ExpirationListener<String, String> listener2 = (k, v) -> {
};
// When
map.addExpirationListener(listener1);
map.addExpirationListener(listener2);
// Then
assertEquals(listener1, map.expirationListeners.get(0));
assertEquals(listener2, map.expirationListeners.get(1));
}
/**
* Tests {@link ExpiringMap#containsKey(Object)}
*/
public void testContainsKey() {
// Given
ExpiringMap<String, String> map = ExpiringMap.create();
map.put("a", "a");
// When / Then
assertTrue(map.containsKey("a"));
assertFalse(map.containsKey("b"));
}
/**
* Tests {@link ExpiringMap#containsValue(Object)}
*/
public void testContainsValue() {
// Given
ExpiringMap<String, String> map = ExpiringMap.create();
ExpiringMap<String, String> variableMap = ExpiringMap.builder().variableExpiration().build();
// When
map.put("a", "a");
variableMap.put("a", "a");
// Then
assertTrue(map.containsValue("a"));
assertFalse(map.containsValue("b"));
assertTrue(variableMap.containsValue("a"));
assertFalse(variableMap.containsValue("b"));
}
/**
* Tests {@link ExpiringMap#create()}.
*/
public void testCreate() {
assertNotNull(ExpiringMap.create());
}
/**
* Tests {@link ExpiringMap#entrySet()}.
*/
public void testEntrySet() {
ExpiringMap<String, String> map = ExpiringMap.create();
Set<Map.Entry<String, String>> entrySet = map.entrySet();
assertTrue(entrySet.isEmpty());
String[] fixtures = new String[] { "a", "b", "c", "d" };
for (String fixture : fixtures)
map.put(fixture, fixture);
List<String> fixturesList = Arrays.asList(fixtures);
for (Map.Entry<String, String> entry : entrySet)
assertTrue(fixturesList.contains(entry.getKey()));
}
/**
* Tests {@link ExpiringMap#getExpectedExpiration(Object)}, ensuring that the expected expiration for an entry changes
* when it's rescheduled.
*/
public void testGetExpectedExpiration() throws Exception {
// Given
ExpiringMap<String, Integer> map = ExpiringMap.builder().expiration(100, TimeUnit.MILLISECONDS).build();
// When / Then
map.put("foo", 1);
Thread.sleep(55);
assertTrue(map.getExpectedExpiration("foo") < 50);
map.put("foo", 2);
assertTrue(map.getExpectedExpiration("foo") > 50);
}
/**
* Tests {@link ExpiringMap#put(Object, Object)} and {@link ExpiringMap#get(Object)}.
*/
public void testPutAndGet() throws Exception {
Map<Integer, Integer> map = ExpiringMap.builder().expiration(100, TimeUnit.MILLISECONDS).build();
for (int i = 0; i < 10; i++)
map.put(i, i);
for (int i = 0; i < 10; i++)
assertEquals(Integer.valueOf(i), map.get(i));
Thread.sleep(150);
for (int i = 0; i < 10; i++)
assertEquals(null, map.get(i));
}
@Test(expectedExceptions = NullPointerException.class)
public void testPutWithNullKey() {
ExpiringMap.create().put(null, "foo");
}
public void testPutWithNullValue() {
// Given
ExpiringMap<String, String> map = ExpiringMap.create();
// When
map.put("test", null);
// Then
assertEquals(map.get("test"), null);
}
/**
* Asserts that putting an entry with an existing key reschedules its expiration.
*/
public void testPutWithSameKey() throws Throwable {
// Given
ExpiringMap<String, String> map = ExpiringMap.builder().expiration(100, TimeUnit.MILLISECONDS).build();
// When
map.put("John", "Doe");
Thread.sleep(50);
map.put("John", "Moe");
Thread.sleep(60);
assertEquals(map.get("John"), "Moe");
Thread.sleep(50);
// Then
assertTrue(map.isEmpty());
}
/**
* Asserts that putting an entry with the same value does not result in a reschedule.
*/
public void testPutWithSameValue() throws Exception {
// Given
Map<String, Integer> map = ExpiringMap.builder().expiration(100, TimeUnit.MILLISECONDS).build();
// When
map.put("foo", 1);
Thread.sleep(55);
map.put("foo", 1);
Thread.sleep(55);
// Then
assertNull(map.get("foo"));
}
/**
* Asserts that putting an entry beyond the max size results in the oldest one being expired.
*/
public void testPutWithMaxSize() throws Exception {
// Given
Map<String, Integer> map = ExpiringMap.builder().expirationPolicy(ExpirationPolicy.CREATED).maxSize(2).build();
// When
map.put("foo", 1);
Thread.sleep(55);
map.put("bar", 1);
Thread.sleep(55);
map.put("abc", 1);
Thread.sleep(55);
// Then
assertNull(map.get("foo"));
assertNotNull(map.get("bar"));
assertNotNull(map.get("abc"));
}
/**
* Asserts that putting an entry beyond the max size results in the least recently accessed one being expired.
*/
public void testPutWithMaxSizeAndExpirationPolicyAccessed() throws Exception {
// Given
Map<String, Integer> map = ExpiringMap.builder().expirationPolicy(ExpirationPolicy.ACCESSED).maxSize(2).build();
// When
map.put("foo", 1);
Thread.sleep(55);
map.put("bar", 1);
Thread.sleep(55);
map.get("foo");
Thread.sleep(55);
map.put("abc", 1);
Thread.sleep(55);
// Then
assertNotNull(map.get("foo"));
assertNull(map.get("bar"));
assertNotNull(map.get("abc"));
}
/**
* Tests {@link ExpiringMap#removeAsyncExpirationListener(ExpirationListener)}.
*/
public void testRemoveAsyncExpirationListener() {
// Given
ExpiringMap<String, String> map = ExpiringMap.create();
ExpirationListener<String, String> listener1 = (k, v) -> {
};
ExpirationListener<String, String> listener2 = (k, v) -> {
};
// When
map.addAsyncExpirationListener(listener1);
map.addAsyncExpirationListener(listener2);
// Then
assertEquals(2, map.asyncExpirationListeners.size());
map.removeAsyncExpirationListener(listener2);
assertEquals(listener1, map.asyncExpirationListeners.get(0));
map.removeAsyncExpirationListener(listener1);
assertTrue(map.asyncExpirationListeners.isEmpty());
}
/**
* Tests {@link ExpiringMap#removeExpirationListener(ExpirationListener)}.
*/
public void testRemoveExpirationListener() {
// Given
ExpiringMap<String, String> map = ExpiringMap.create();
ExpirationListener<String, String> listener1 = (k, v) -> {
};
ExpirationListener<String, String> listener2 = (k, v) -> {
};
// When
map.addExpirationListener(listener1);
map.addExpirationListener(listener2);
// Then
assertEquals(2, map.expirationListeners.size());
map.removeExpirationListener(listener2);
assertEquals(listener1, map.expirationListeners.get(0));
map.removeExpirationListener(listener1);
assertTrue(map.expirationListeners.isEmpty());
}
/**
* Asserts that a remove on a map that is empty after the remove causes no side effect.
*/
public void testRemoveWithOneEntry() {
Map<String, String> map = ExpiringMap.create();
map.put("test", "test");
map.remove("test");
map = ExpiringMap.builder().variableExpiration().build();
map.put("test", "test");
map.remove("test");
}
/**
* Tests that {@link ExpiringMap#setExpiration(Object, long, TimeUnit)} works as expected.
*/
public void testSetEntryExpiration() throws Exception {
ExpiringMap<String, String> map = ExpiringMap.builder().variableExpiration().build();
map.put("a", "a");
map.put("b", "b");
map.put("c", "c");
map.put("d", "d");
map.setExpiration("c", 100, TimeUnit.MILLISECONDS);
Thread.sleep(120);
assertTrue(map.containsKey("a"));
assertTrue(map.containsKey("b"));
assertFalse(map.containsKey("c"));
assertTrue(map.containsKey("d"));
}
/**
* Tests that {@link ExpiringMap#setExpirationPolicy(Object, ExpirationPolicy) works as expected.
*/
public void testSetEntryExpirationPolicy() throws Exception {
ExpiringMap<String, String> map = ExpiringMap.builder()
.variableExpiration()
.expiration(100, TimeUnit.MILLISECONDS)
.build();
map.put("a", "a");
map.put("b", "b");
map.put("c", "c");
map.get("a");
map.get("c");
Thread.sleep(110);
assertFalse(map.containsKey("a"));
assertFalse(map.containsKey("b"));
assertFalse(map.containsKey("c"));
map.put("a", "a");
map.put("b", "b");
map.put("c", "c");
map.setExpirationPolicy("b", ExpirationPolicy.ACCESSED);
Thread.sleep(50);
map.get("b");
Thread.sleep(60);
assertFalse(map.containsKey("a"));
assertTrue(map.containsKey("b"));
assertFalse(map.containsKey("c"));
Thread.sleep(50);
assertTrue(map.isEmpty());
}
/**
* Tests that {@link ExpiringMap#setExpiration(long, TimeUnit)} works as expected.
*/
public void testSetExpiration() throws Exception {
ExpiringMap<String, String> map = ExpiringMap.builder()
.variableExpiration()
.expiration(100, TimeUnit.MILLISECONDS)
.build();
map.put("a", "a");
Thread.sleep(150);
assertTrue(map.isEmpty());
map.setExpiration(500, TimeUnit.MILLISECONDS);
map.put("a", "a");
Thread.sleep(200);
assertTrue(map.containsKey("a"));
Thread.sleep(350);
assertTrue(map.isEmpty());
}
/**
* Tests that {@link ExpiringMap#setExpirationPolicy(ExpirationPolicy) works as expected.
*/
public void testSetExpirationPolicy() throws Exception {
ExpiringMap<String, String> map = ExpiringMap.builder()
.variableExpiration()
.expiration(100, TimeUnit.MILLISECONDS)
.build();
map.put("a", "a");
map.put("b", "b");
map.put("c", "c");
Thread.sleep(50);
map.setExpirationPolicy(ExpirationPolicy.ACCESSED);
map.put("d", "d");
Thread.sleep(50);
map.get("d");
Thread.sleep(50);
map.get("d");
Thread.sleep(50);
assertFalse(map.containsKey("a"));
assertFalse(map.containsKey("b"));
assertFalse(map.containsKey("c"));
assertTrue(map.containsKey("d"));
Thread.sleep(60);
assertTrue(map.isEmpty());
}
public void testSetThreadFactory() throws Throwable {
ExpiringMap.EXPIRER = null;
ExpiringMap.LISTENER_SERVICE = null;
ExpiringMap.setThreadFactory(Executors.defaultThreadFactory());
ExpiringMap<String, String> map = ExpiringMap.builder().expiration(100, TimeUnit.MILLISECONDS).build();
map.put("foo", "bar");
Thread.sleep(150);
assertTrue(map.isEmpty());
}
/**
* Tests {@link ExpiringMap#values()}.
*/
public void testValues() {
ExpiringMap<String, String> map = ExpiringMap.create();
Collection<String> values = map.values();
assertTrue(values.isEmpty());
String[] fixtures = new String[] { "a", "b", "c", "d" };
for (String fixture : fixtures)
map.put(fixture, fixture);
assertEquals(values, Arrays.asList(fixtures));
assertTrue(values.containsAll(Arrays.asList(fixtures)));
}
/**
* Asserts that concurrent modification throws an exception.
*/
@Test
public void testValuesNotThrowsOnConcurrentModification() {
ExpiringMap<String, String> map = ExpiringMap.create();
map.put("a", "a");
map.put("b", "b");
Iterator<String> valuesIterator = map.values().iterator();
valuesIterator.next();
map.put("c", "c");
valuesIterator.next();
}
}