@Test
    void tlsCustomizationWithInputStream() {
        tlsCustomization(sb -> {
                             try {
                                 sb.tls(new FileInputStream(selfSignedCertificate.certificateFile()),
                                        new FileInputStream(selfSignedCertificate.privateKeyFile()));
                             } catch (FileNotFoundException e) {
                                 throw new AssertionError(e);
                             }
                         },
                         vhb -> {
                             try {
                                 vhb.tls(new FileInputStream(selfSignedCertificate.certificateFile()),
                                         new FileInputStream(selfSignedCertificate.privateKeyFile()));
                             } catch (FileNotFoundException e) {
                                 throw new AssertionError(e);
                             }
                         });
    }
Makes sure that {@link ServerBuilder#decorator(DecoratingHttpServiceFunction)} works at every service and
virtual hosts and {@link VirtualHostBuilder#decorator(DecoratingHttpServiceFunction)} works only at
its own services.
core/src/test/java/com/linecorp/armeria/server/ServerBuilderTest.java