Deserialize List with Jackson in JUnit (Jersey Client) - json

Question

I recently moved from Jersey 1.X to Jersey 2.1 and using jersey-media-json-jackson for (de-)serializing to Json.
In my JUnit-Test I would like to consume a web service that return a List.
With Jerey 1.x I used to work with GenericType. However, folling code does not work with Jersey 2.1 / Jackson 2.1:
GenericType<Collection<String>> listType = new GenericType<Collection<String>>() {};
assertTrue(target("location").request().get(listType).contains("item"));
it crashes with
org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException:
MessageBodyReader not found for media type=application/json,
type=interface java.util.List, genericType=java.util.Collection<java.lang.String>.
Serializing is okay, since following code:
target("location").request().accept(MediaType.APPLICATION_JSON).get(String.class);
returns a valid Json String
Any ideas how to fix? Any working examples?
Versions:
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-common</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-json-jackson</artifactId>
<version>2.1</version>
</dependency>

Answer 1

Probably too late and you found the solution, but here it is for some else who might run into the same problem. Make sure you register the JacksonFeature on a client config before creating your client, code example below.
ClientConfig cc = new ClientConfig().register(new JacksonFeature());
Client client = ClientBuilder.newClient(cc);
WebTarget target = client.target(url);