@Test
void testDeletePair() {

    String pipelineUuid = UUID.randomUUID().toString();
    String pipelineVersion = UUID.randomUUID().toString();
    RefStreamDefinition refStreamDefinition = new RefStreamDefinition(pipelineUuid, pipelineVersion, 1);
    MapDefinition mapDefinition1 = new MapDefinition(refStreamDefinition, "map1");
    MapDefinition mapDefinition2 = new MapDefinition(refStreamDefinition, "map2");
    MapDefinition mapDefinition3 = new MapDefinition(refStreamDefinition, "map3");
    final Map<UID, MapDefinition> loadedEntries = loadEntries(mapDefinition1, mapDefinition2, mapDefinition3);
    assertThat(mapUidForwardDb.getEntryCount()).isEqualTo(3);
    assertThat(mapUidReverseDb.getEntryCount()).isEqualTo(3);
    LmdbUtils.doWithWriteTxn(lmdbEnv, writeTxn -> {
        mapDefinitionUIDStore.deletePair(writeTxn, loadedEntries.entrySet().iterator().next().getKey());
    });
    assertThat(mapUidForwardDb.getEntryCount()).isEqualTo(2);
    assertThat(mapUidReverseDb.getEntryCount()).isEqualTo(2);
}