@Test
    void jsonTextSequences_publisherError() throws Exception {
        StepVerifier.create(Mono.error(new AnticipatedException()))
                    .expectError(AnticipatedException.class)
                    .verify();

        final Flux<String> publisher = Flux.concat(Flux.fromArray(TEST_STRINGS),
                                                   Mono.error(new AnticipatedException()));
        expectJsonSeqContents(publisher)
                .expectError(AnticipatedException.class)
                .verify();
    }
{@link HttpData} instances which are expected to be produced by the
{@link JacksonResponseConverterFunction} when the function gets the
{@link #TEST_STRINGS} as input.
core/src/test/java/com/linecorp/armeria/server/annotation/JacksonResponseConverterFunctionTest.java