Add a Default Exception Mapper test.

jaxrs-tck/src/main/java/ee/jakarta/tck/ws/rs/ee/resource/webappexception/nomapper/JAXRSClientIT.java

@@ -30,9 +30,9 @@
 import org.junit.jupiter.api.TestInfo;
 import org.junit.jupiter.api.extension.ExtendWith;
 
-import jakarta.ws.rs.core.Response.Status;
 import ee.jakarta.tck.ws.rs.common.JAXRSCommonClient;
 import ee.jakarta.tck.ws.rs.lib.util.TestUtil;
+import jakarta.ws.rs.core.Response.Status;
 
 /*
  * @class.setup_props: webServerHost;
@@ -296,4 +296,19 @@ public void throwableStatusCodeTest() throws Fault {
     setProperty(STATUS_CODE, getStatusCode(Status.NO_CONTENT));
     invoke();
   }
+
+  /*
+   * @testName: defaultExceptionMapperTest
+   * 
+   * @assertion_ids: JAXRS:JAVADOC:19;
+   * 
+   * @test_Strategy: Client invokes GET on root resource at /resource; Verify
+   * that Throwable is mapped to HTTP 500.
+   */
+  @Test
+  public void defaultExceptionMapperTest() throws Fault {
+    setProperty(REQUEST, buildRequest(GET, "DefaultExceptionMapperTest"));
+    setProperty(STATUS_CODE, getStatusCode(Status.INTERNAL_SERVER_ERROR));
+    invoke();
+  }
 }

jaxrs-tck/src/main/java/ee/jakarta/tck/ws/rs/ee/resource/webappexception/nomapper/Resource.java

@@ -138,6 +138,12 @@ public Response throwableStatusCodeTest() {
         new Throwable(id("-throwableStatusCodeTest")), 204);
   }
 
+  @GET
+  @Path("/DefaultExceptionMapperTest")
+  public Response defaultExceptionMapperTest() throws Throwable {
+    throw new Throwable(id("-defaultExceptionMapperTest"));
+  }
+
   public static String id(String suffix) {
     return new StringBuilder().append(TESTID).append(suffix).toString();
   }