java Jersey测试在目标（…）处从主包>NullPointerException运行方法时失败

Question

所以我用这个例子测试了它：

路径：pkg > src > test > java > rest > SimpleJerseyTest

public class SimpleJerseyTest extends JerseyTest {

    @Path("hello")
    public static class HelloResource {
        @GET
        public String getHello() {
            return "Hello World!";
        }
    }

    @Override
    protected Application configure() {
        return new ResourceConfig(HelloResource.class);
    }

    @Test
    public void test() {
        Response response = target("hello").request().get();

        assertEquals("Http Response should be 200: ", Response.Status.OK.getStatusCode(), response.getStatus());
        assertEquals("Http Content-Type should be: ", MediaType.TEXT_HTML, response.getHeaderString(HttpHeaders.CONTENT_TYPE));

        String content = response.readEntity(String.class);
        System.out.println("Gotten response: " + content);
        assertEquals("Content of ressponse is: ", "Hello World!", content);
    }
}

这是测试的输出：

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Jul 24, 2020 11:29:07 AM org.glassfish.jersey.test.grizzly.GrizzlyTestContainerFactory$GrizzlyTestContainer <init>
INFO: Creating GrizzlyTestContainer configured at the base URI http://localhost:9998/
Jul 24, 2020 11:29:08 AM org.glassfish.grizzly.http.server.NetworkListener start
INFO: Started listener bound to [localhost:9998]
Jul 24, 2020 11:29:08 AM org.glassfish.grizzly.http.server.HttpServer start
INFO: [HttpServer] Started.
Gotten response: Hello World!
Jul 24, 2020 11:29:08 AM org.glassfish.grizzly.http.server.NetworkListener shutdownNow
INFO: Stopped listener bound to [localhost:9998]



Process finished with exit code 0

但是，当我将REST服务类放在主包中时，它不再工作（NullPointerException）：

包：pkg > src > main > java > rest > BookService

@Path("books")
public class BookService  {
    @GET
    public String getAll() {
        return "test";
    }
}

然后测试：

包：pkg > src > test > rest > BookServiceTest

class BookServiceTest extends JerseyTest {
    @Override
    protected Application configure() {
        return new ResourceConfig(BookService.class);
    }

    @Test
    void get() {
        Response response = target("books").request().get();
    }
}

这是测试的输出：

java.lang.NullPointerException
    at org.glassfish.jersey.test.JerseyTest.target(JerseyTest.java:541)
    at org.glassfish.jersey.test.JerseyTest.target(JerseyTest.java:555)
    at rest.BookServiceTest.get(BookServiceTest.java:21)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

// ...



Process finished with exit code -1

有什么区别？有人知道为什么它使用静态的内部类，而不使用外部类吗

Answer 1

我弄明白了——我用错了进口

它应该是import org.junit.Test，而不是import org.junit.jupiter.api.Test