List collist = new Vector(Arrays.asList(collections));
assertTrue(collist.contains("child1"));
assertTrue(collist.contains("child2"));
this.client.dropCollection(TEST_COLLECTION_PATH, "child1");
collections = col.listChildCollections();
assertEquals(1, collections.length);
assertEquals("child2", collections[0]);
this.client.dropCollection(TEST_COLLECTION_PATH, "child2");