@Test
  public void createWithSystem_setsGivenSystem_onConstructedCache_ifSystemCacheDoesNotExist() {
    InternalDistributedSystem givenSystem = systemWithNoCache();

    InternalCacheConstructor cacheConstructor = constructorOf(constructedCache());

    InternalCacheBuilder internalCacheBuilder = new InternalCacheBuilder(
        new Properties(), new CacheConfig(), metricsSessionBuilder, THROWING_SYSTEM_SUPPLIER,
        THROWING_SYSTEM_CONSTRUCTOR,
        THROWING_CACHE_SUPPLIER, cacheConstructor);

    internalCacheBuilder
        .create(givenSystem);

    verify(cacheConstructor)
        .construct(anyBoolean(), any(), same(givenSystem), any(), anyBoolean(), any());
  }
Unit tests for {@link InternalCacheBuilder} when
{@code InternalDistributedSystem.ALLOW_MULTIPLE_SYSTEMS} is set to true.
geode-core/src/test/java/org/apache/geode/internal/cache/InternalCacheBuilderAllowsMultipleSystemsTest.java