JAXRS: Fix NPE when @Path is first on a method

jaxrs/src/main/java/feign/jaxrs/JAXRSContract.java

@@ -90,7 +90,7 @@ public final class JAXRSContract extends Contract.BaseContract {
       String pathValue = emptyToNull(Path.class.cast(methodAnnotation).value());
       checkState(pathValue != null, "Path.value() was empty on method %s", method.getName());
       String methodAnnotationValue = Path.class.cast(methodAnnotation).value();
-      if (!methodAnnotationValue.startsWith("/") && !data.template().toString().endsWith("/")) {
+      if (!methodAnnotationValue.startsWith("/") && !data.template().url().endsWith("/")) {
         methodAnnotationValue = "/" + methodAnnotationValue;
       }
       // jax-rs allows whitespace around the param name, as well as an optional regex. The contract should

jaxrs/src/test/java/feign/jaxrs/JAXRSContractTest.java

@@ -361,6 +361,12 @@ public class JAXRSContractTest {
               .hasUrl("/base/specific");
   }
 
+  @Test
+  public void methodPathWithoutLeadingSlashParsesCorrectly() throws Exception {
+      assertThat(parseAndValidateMetadata(MethodWithFirstPathThenGetWithoutLeadingSlash.class, "get").template())
+              .hasUrl("/base/specific");
+  }
+
   interface Methods {
 
     @POST
@@ -568,6 +574,13 @@ public class JAXRSContractTest {
       Response get();
   }
 
+  @Path("/base/")
+  interface MethodWithFirstPathThenGetWithoutLeadingSlash {
+      @Path("specific")
+      @GET
+      Response get();
+  }
+
   private MethodMetadata parseAndValidateMetadata(Class<?> targetType, String method,
                                                   Class<?>... parameterTypes)
       throws NoSuchMethodException {