@Test
public void testCustomizeServletContainer() {

    env.setActiveProfiles(JHipsterConstants.SPRING_PROFILE_PRODUCTION);
    UndertowServletWebServerFactory container = new UndertowServletWebServerFactory();
    webConfigurer.customize(container);
    assertThat(container.getMimeMappings().get("abs")).isEqualTo("audio/x-mpeg");
    assertThat(container.getMimeMappings().get("html")).isEqualTo("text/html;charset=utf-8");
    assertThat(container.getMimeMappings().get("json")).isEqualTo("text/html;charset=utf-8");
    if (container.getDocumentRoot() != null) {
        assertThat(container.getDocumentRoot().getPath()).isEqualTo(FilenameUtils.separatorsToSystem("build/www"));
    }
    Builder builder = Undertow.builder();
    container.getBuilderCustomizers().forEach(c -> c.customize(builder));
    OptionMap.Builder serverOptions = (OptionMap.Builder) ReflectionTestUtils.getField(builder, "serverOptions");
    assertThat(serverOptions.getMap().get(UndertowOptions.ENABLE_HTTP2)).isNull();
}