AEM Unit Test for a component that uses a Service returning a list of paths based on a Query

[anasustic]

Hi

I need to write a Unit Test for an AEM component that uses a service that returns a list of paths based on a Query. 

How do I write a Unit Test for such a method.

getBlogItemsForPaths(someService.findPages(filter), resource, blogContext);

 the someService returns a list of paths:

public List<String> someService(@Nonnull BlogArticleFilter filter) {
    if (filter.getTagList().isEmpty()) {
        return Collections.emptyList();
    }

    final String pathQuery = buildDesendantNodeString(filter.getPathList());
    final String tagQuery = buildTagQuery(filter);
    final String query = String.format(QUERY, pathQuery, Constants.TemplateType.BLOG_ARTICLE_PAGE.getTemplatePath(), tagQuery);

    return resourceResolverUsageService.withServiceUserResourceResolver(ServiceUser.CONTENT_READER, resolver -> {
        return StreamUtil.iteratorStream(resolver.findResources(query, Query.JCR_SQL2))
                .sorted(Comparator.comparing(this::getDate, Comparator.reverseOrder()))
                .map(Resource::getPath)
                .filter(s -> !filter.getIgnoreList().contains(s))
                .limit(filter.getMaxItems())
                .collect(Collectors.toList());
    });
}

[Peter_Puzanovs · Accepted solution]

Hi Anasustic,

Mockito is a wonderful library that let's you Mock any third party service that lives outside of your main class.

You can use @Mock annotation to mock any service you do not want to test in this particular tests and inject these into your @test with @RunWith(MockitoJunitRunnr.class) comand.

Some useful tutorials[1] [2]

[1] java - How to use Mockito with JUnit5 - Stack Overflow

[2] Unit testing | Adobe Experience Manager

Regards,

Peter