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add method isEmpty to PersistentMap

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This commit is contained in:
Andreas Huber
2021-10-16 16:59:58 +02:00
parent 3d72231415
commit cce2c052f2
2 changed files with 38 additions and 0 deletions
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23
block-storage/src/test/java/org/lucares/pdb/map/PersistentMapTest.java
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@@ -375,6 +375,29 @@ public class PersistentMapTest {
}
}
@Test
public void testIsEmpty() throws IOException {
final Path file = dataDirectory.resolve("map.db");
try (final PersistentMap<Long, Long> map = new PersistentMap<>(file, dataDirectory, PersistentMap.LONG_CODER,
PersistentMap.LONG_CODER)) {
Assertions.assertTrue(map.isEmpty(), "new created map is empty");
}
try (final PersistentMap<Long, Long> map = new PersistentMap<>(file, dataDirectory, PersistentMap.LONG_CODER,
PersistentMap.LONG_CODER)) {
Assertions.assertTrue(map.isEmpty(), "map is empty after reading an empty map from disk");
map.putValue(1L, 2L);
Assertions.assertFalse(map.isEmpty(), "map is empty after putting a value");
}
try (final PersistentMap<Long, Long> map = new PersistentMap<>(file, dataDirectory, PersistentMap.LONG_CODER,
PersistentMap.LONG_CODER)) {
Assertions.assertFalse(map.isEmpty(), "map is empty when reading a non empty map from disk");
}
}
private void assertValuesInMap(final Map<Long, Long> insertedValues, final PersistentMap<Long, Long> map) {
final AtomicInteger counter = new AtomicInteger();
final AtomicInteger maxDepth = new AtomicInteger();