@Test
void getAll() {

    Map<String, TestCache> values = cacheStore.getAll(new String[]{"key1", "key2"}, null);
    assertThat(values).isEmpty();
    var value = new TestCache();
    cacheStore.put("key1", value, Duration.ofMinutes(1), null);
    values = cacheStore.getAll(new String[]{"key1", "key2"}, null);
    assertThat(values).hasSize(1).containsEntry("key1", value);
}