abhishekrb19 commented on code in PR #17212:
URL: https://github.com/apache/druid/pull/17212#discussion_r1800526838
##########
extensions-core/lookups-cached-single/src/test/java/org/apache/druid/server/lookup/LoadingLookupTest.java:
##########
@@ -73,14 +75,24 @@ public void testUnapplyNull()
}
@Test
- public void testApply() throws ExecutionException
+ public void testApply()
{
- EasyMock.expect(lookupCache.get(EasyMock.eq("key"),
EasyMock.anyObject(Callable.class))).andReturn("value").once();
+
EasyMock.expect(lookupCache.getIfPresent(EasyMock.eq("key"))).andReturn("value").once();
EasyMock.replay(lookupCache);
Assert.assertEquals(ImmutableMap.of("key", "value"),
loadingLookup.applyAll(ImmutableSet.of("key")));
EasyMock.verify(lookupCache);
}
+ @Test
+ public void testApplyWithNullCase()
+ {
+
EasyMock.expect(lookupCache.getIfPresent(EasyMock.eq("key"))).andReturn("value").once();
+ EasyMock.expect(dataFetcher.fetch("key")).andReturn(null).once();
+ EasyMock.replay(lookupCache, dataFetcher);
+ Assert.assertNull(loadingLookup.apply("key"));
+ EasyMock.verify(lookupCache, dataFetcher);
Review Comment:
Could you add a test to verify the following scenario:
1. apply("key"): cache miss and load "key" from the `dataFetcher`
2. apply("key"): cache hit and load "key" directly from the `lookupCache`
Verifies that subsequent calls to `apply()` with the same key becomes a
cache hit.
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