Simplify EventListenerTest.java

java/src/test/java/org/rocksdb/EventListenerTest.java

@@ -78,16 +78,10 @@ void deleteTableFile(final AbstractEventListener el, final AtomicBoolean wasCbCa
     final int KEY_SIZE = 20;
     final int VALUE_SIZE = 1000;
     final int FILE_SIZE = 64000;
-    final int NUM_FILES = 10;
-
+    final int NUM_FILES = 2;
     final int KEY_INTERVAL = 10000;
-    /*
-     * Intention of these options is to end up reliably with 10 files
-     * we will be deleting using deleteFilesInRange.
-     * It is writing roughly number of keys that will fit in 10 files (target size)
-     * It is writing interleaved so that files from memory on L0 will overlap
-     * Then compaction cleans everything, and we should end up with 10 files
-     */
+    final int records = FILE_SIZE / (KEY_SIZE + VALUE_SIZE);
+    final FlushOptions flushOptions = new FlushOptions().setWaitForFlush(true);
     try (final Options opt = new Options()
                                  .setCreateIfMissing(true)
                                  .setListeners(Collections.singletonList(el))
@@ -97,9 +91,6 @@ void deleteTableFile(final AbstractEventListener el, final AtomicBoolean wasCbCa
                                  .setDisableAutoCompactions(true)
                                  .setLevelCompactionDynamicLevelBytes(false);
          final RocksDB db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath())) {
-      final int records = FILE_SIZE / (KEY_SIZE + VALUE_SIZE);
-
-      // fill database with key/value pairs
       final byte[] value = new byte[VALUE_SIZE];
       int key_init = 0;
       for (int o = 0; o < NUM_FILES; ++o) {
@@ -110,11 +101,10 @@ void deleteTableFile(final AbstractEventListener el, final AtomicBoolean wasCbCa
 
           db.put(String.format("%020d", int_key).getBytes(), value);
         }
-      }
-      try (final FlushOptions flushOptions = new FlushOptions().setWaitForFlush(true)) {
+        // Produce NUM_FILES files - all with the same contents.
         db.flush(flushOptions);
+        int_key = 0;
       }
-      db.compactRange();
       db.deleteFilesInRanges(null, Arrays.asList(null, null), false /* includeEnd */);
     }
     assertThat(wasCbCalled.get()).isTrue();