### Question:
B2StorageClientFactoryPathBasedImpl implements B2StorageClientFactory { public synchronized B2StorageClient create(B2ClientConfig config) { if (factory == null) { factory = findAndCreateFactory(); } return factory.create(config); } B2StorageClientFactoryPathBasedImpl(); synchronized B2StorageClient create(B2ClientConfig config);  }### Answer:
@Test public void testDefaultFactory_failsBecauseTestEnvironmentDoesntIncludeHttpClientJars() { final B2StorageClientFactory factory = B2StorageClientFactory.createDefaultFactory(); thrown.expectMessage("can't find any of the registered classes."); factory.create("appKeyId", "appKey", "userAgent"); }