@Test
  void customMethodWithoutPath() throws Exception {
    assertThat(parseAndValidateMetadata(CustomMethod.class, "patch").template())
        .hasMethod("PATCH")
        .hasUrl("/");
  }
Tests interfaces defined per {@link Contract.Default} are interpreted into expected {@link feign
.RequestTemplate template} instances.
core/src/test/java/feign/DefaultContractTest.java