iSharkFly-Docs
/
java-tutorials
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

BAEL-672 test case when one object is still referenced

This commit is contained in:
Tomasz Lelek 2017-02-07 17:50:11 +01:00
parent 0f59b0d533
commit 69bfaa557a
1 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
core-java/src/test/java/com/baeldung/weakhashmap/WeakHashMapTest.java
View File

@ -29,6 +29,30 @@ public class WeakHashMapTest {
await().atMost(10, TimeUnit.SECONDS).until(map::isEmpty); await().atMost(10, TimeUnit.SECONDS).until(map::isEmpty);
} }
@Test
public void givenWeakHashMap_whenCacheValueThatHasNoReferenceToIt_GCShouldReclaimThatObjectButLeaveReferencedObject() {
//given
WeakHashMap<UniqueImageName, BigImage> map = new WeakHashMap<>();
BigImage bigImageFirst = new BigImage("foo");
UniqueImageName imageNameFirst = new UniqueImageName("name_of_big_image");
BigImage bigImageSecond = new BigImage("foo_2");
UniqueImageName imageNameSecond = new UniqueImageName("name_of_big_image_2");
map.put(imageNameFirst, bigImageFirst);
map.put(imageNameSecond, bigImageSecond);
assertTrue(map.containsKey(imageNameFirst));
assertTrue(map.containsKey(imageNameSecond));
//when
imageNameFirst = null;
System.gc();
//then
await().atMost(10, TimeUnit.SECONDS).until(() -> map.size() == 1);
await().atMost(10, TimeUnit.SECONDS).until(() -> map.containsKey(imageNameSecond));
}
class BigImage { class BigImage {
public final String imageId; public final String imageId;