@Test
  public void testRouterMetadataCacheUnexpectedInternalErrorOnDeleteCompositeBlob() throws Exception {
    routerMetadataCacheErrorOnDeleteCompositeBlob(ServerErrorCode.UnknownError,
        RouterErrorCode.UnexpectedInternalError);
  }
Tests that there no metadata cache evictions with a large enough cache.
@throws Exception
ambry-router/src/test/java/com/github/ambry/router/NonBlockingRouterTest.java