zachjsh commented on code in PR #15415:
URL: https://github.com/apache/druid/pull/15415#discussion_r1416385190


##########
server/src/test/java/org/apache/druid/metadata/IndexerSQLMetadataStorageCoordinatorTest.java:
##########
@@ -1208,12 +1208,64 @@ public void 
testRetrieveUnusedSegmentsUsingMultipleIntervalsAndNoLimit() throws
 
     final ImmutableList<DataSegment> actualUnusedSegments = 
retrieveUnusedSegmentsUsingMultipleIntervalsAndLimit(
         
segments.stream().map(DataSegment::getInterval).collect(Collectors.toList()),
+        null,
         null
     );
     Assert.assertEquals(segments.size(), actualUnusedSegments.size());
     Assert.assertTrue(segments.containsAll(actualUnusedSegments));
   }
 
+  @Test
+  public void testRetrieveUnusedSegmentsUsingNoIntervalsAndNoLimit() throws 
IOException
+  {
+    final List<DataSegment> segments = createAndGetUsedYearSegments(1900, 
2133);
+    markAllSegmentsUnused(new HashSet<>(segments));
+
+    final ImmutableList<DataSegment> actualUnusedSegments = 
retrieveUnusedSegmentsUsingMultipleIntervalsAndLimit(
+        ImmutableList.of(),
+        null,
+        null
+    );
+    Assert.assertEquals(segments.size(), actualUnusedSegments.size());
+    Assert.assertTrue(segments.containsAll(actualUnusedSegments));
+  }
+
+  @Test
+  public void testRetrieveUnusedSegmentsUsingNoIntervalsAndNoLimitAndOffset() 
throws IOException
+  {
+    final List<DataSegment> segments = createAndGetUsedYearSegments(2033, 
2133);
+    markAllSegmentsUnused(new HashSet<>(segments));
+
+    int offset = 10;
+    List<DataSegment> expectedSegments = 
segments.stream().sorted((Comparator<DataSegment>) (o1, o2) -> {
+      long o1Start = o1.getInterval().getStartMillis();
+      long o2Start = o2.getInterval().getStartMillis();
+      if (o1Start < o2Start) {
+        return -1;
+      } else if (o1Start > o2Start) {
+        return 1;
+      } else {
+        long o1End = o1.getInterval().getEndMillis();
+        long o2End = o2.getInterval().getEndMillis();
+        if (o1End < o2End) {
+          return -1;
+        }
+        return o1End > o2End
+            ? 1
+            : 0;
+      }
+    })
+        .skip(offset)
+        .collect(Collectors.toList());
+    final ImmutableList<DataSegment> actualUnusedSegments = 
retrieveUnusedSegmentsUsingMultipleIntervalsAndLimit(
+        ImmutableList.of(),
+        null,
+        offset
+    );
+    Assert.assertEquals(expectedSegments.size(), actualUnusedSegments.size());
+    Assert.assertTrue(expectedSegments.containsAll(actualUnusedSegments));
+  }
+

Review Comment:
   added



##########
server/src/test/java/org/apache/druid/server/http/MetadataResourceTest.java:
##########
@@ -236,6 +246,117 @@ public void testGetAllSegmentsIncludingRealtime()
     Assert.assertEquals(new SegmentStatusInCluster(realTimeSegments[1], false, 
null, 40L, true), resultList.get(5));
   }
 
+  @Test
+  public void testGetUnusedSegmentsInDataSource()
+  {
+    Mockito.doAnswer(mockIterateAllUnusedSegmentsForDatasource())
+        .when(segmentsMetadataManager)
+        .iterateAllUnusedSegmentsForDatasource(
+            ArgumentMatchers.any(),
+            ArgumentMatchers.any(),
+            ArgumentMatchers.any(),
+            ArgumentMatchers.any());
+
+    // test with null datasource name - fails with expected bad datasource 
name error
+    DruidException e = Assert.assertThrows(
+        DruidException.class,
+        () -> metadataResource.getUnusedSegmentsInDataSource(request, null, 
null, -1, null)
+    );
+    Assert.assertEquals(DruidException.Category.INVALID_INPUT, 
e.getCategory());
+    Assert.assertEquals("dataSource name must be non-empty", e.getMessage());

Review Comment:
   fixed



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