private void assertForwardFileItemContent(final List<ForwardFileItem> forwardFileItems,
                                              final List<String> expectedFiles) {
        forwardFileItems.forEach(forwardFileItem -> {
            for (int i = 0; i < forwardFileItem.zipItems().size(); i++) {
                final ZipItem zipItem = forwardFileItem.zipItems().get(i);
                final String expectedName = expectedFiles.get(i);
                final String actualName = zipItem.baseName() + zipItem.type().getDotExtension();
                Assertions.assertThat(actualName).isEqualTo(expectedName);
                Assertions.assertThat(zipItem.content().length()).isGreaterThan(1);
            }
        });
    }
Assert all the {@link UniqueId}s contained in the stored aggregates
stroom-proxy/stroom-proxy-app/src/test/java/stroom/proxy/app/MockFileDestination.java