@Test
    @SetSystemProperty(key = "com.linecorp.armeria.requestContextLeakDetectionSampler", value = "always")
    void systemPropertyRequestContextLeakDetectionSampler() throws Exception {
        final Method method = flags.getDeclaredMethod("requestContextLeakDetectionSampler");
        assertThat(method.invoke(flags))
                .usingRecursiveComparison()
                .isEqualTo(Sampler.always());
    }
Makes sure OpenSSL SSLEngine is used instead of JDK SSLEngine while running tests
on Linux, Windows and OS X.
core/src/test/java/com/linecorp/armeria/common/FlagsTest.java