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https://github.com/t1/jax-rs-test-extension

JUnit-5 extension to help testing JAX-RS infrastructure classes
https://github.com/t1/jax-rs-test-extension

integration-testing jax-rs junit5

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JUnit-5 extension to help testing JAX-RS infrastructure classes

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= JAX-RS Test Extension image:https://maven-badges.herokuapp.com/maven-central/com.github.t1/jax-rs-test-extension/badge.svg[link=https://search.maven.org/artifact/com.github.t1/jax-rs-test-extension]

[IMPORTANT]
This project has been archived!!!
http://com.github/t1/wunderbar[WunderBar] might be a better fit for your use-case.

Very simple (and fast) https://junit.org/junit5/[JUnit-5] extension to test JAX-RS infrastructure classes. Uses RestEasy + Undertow internally, but you shouldn't notice that too often; just stick to JAX-RS + JSON-B.

There are two use-cases:

== 1. Boundaries

These are your classes that provide a REST service using JAX-RS server API; i.e.:

[source,java]
---------------------------------------------------------------
@Path("/") public class MyBoundary {
@GET public String get() { return "foo"; }
}
---------------------------------------------------------------

Could be tested like this:

[source,java]
---------------------------------------------------------------
public class MyBoundaryTest {

@RegisterExtension static JaxRsClientTest jaxRs = new JaxRsClientTest(new MyBoundary());

@Test public void shouldGet() {
Response response = jaxRs.GET("/");

assertThat(response.getStatusInfo()).isEqualTo(OK);
assertThat(response.readEntity(String.class)).isEqualTo("foo");
}
}
---------------------------------------------------------------

== 2. Gateways

These are your classes that consume a REST service using the JAX-RS client API, and you don't want to integrate with the real external service; i.e.:

[source,java]
---------------------------------------------------------------
public class MyGateway {
Client client;
URI baseUri;

public String getFoo() {
Response response = client.target(baseUri).request(TEXT_PLAIN_TYPE).get();
assert 200 == response.getStatus();
return response.readEntity(String.class);
}
}
---------------------------------------------------------------

Could be tested like this:

[source,java]
---------------------------------------------------------------
public class MyGatewayTest {
@Path("/") public static class MockService {
@GET public String get() { return "foo"; }
}

@RegisterExtension static JaxRsTestExtension jaxRs = new JaxRsTestExtension(new MockService());

@Test void shouldGet() {
MyGateway gateway = new MyGateway();
gateway.client = jaxRs.client();
gateway.baseUri = jaxRs.baseUri();

String foo = gateway.getFoo();

assertThat(foo).isEqualTo("foo");
}
}
---------------------------------------------------------------

== Limitations

1. There is no dependency injection, etc. You'll have to pass in fully built JAX-RS service instances.
2. This is _not_ for integration tests! E.g. it uses it's own `Application` class. These test qualify as a unit tests: they only test your Boundary or Gateway in isolation.