client.init();
        }
        assertTrue("Client should be initialized", client.isInit.get());

        // Second initialization attempt should be no-op
        boolean secondInit = client.isInit.compareAndSet(false, true);
        assertFalse("Second initialization should not occur", secondInit);
        assertTrue("Client should still be initialized", client.isInit.get());
    }

        final InputStream in2 = new ByteArrayInputStream("data2".getBytes());

        // First call
        extractor.testValidateInputStream(in1);

        // Second call with different stream
        extractor.testValidateInputStream(in2);

        // Third call with null should still throw
        try {
            extractor.testValidateInputStream(null);

                .get()
                .post()
                .url("https://first.com")
                .url("https://second.com")
                .weight(1.0f)
                .weight(2.0f)
                .build();

        assertEquals(Method.POST, data.getMethod());
        assertEquals("https://second.com", data.getUrl());
        assertEquals(2.0f, data.getWeight(), 0.001f);
    }

        }

        /**
         * Compares two times.
         *
         * @param h1 the first hour
         * @param m1 the first minute
         * @param h2 the second hour
         * @param m2 the second minute
         * @return positive if first time is earlier, 0 if equal, negative if later
         */
        protected int compareTime(final int h1, final int m1, final int h2, final int m2) {

                assertFalse(iterator2.hasNext(), "Second instance should have no elements");
                assertFalse(iterator3.hasNext(), "Third instance should have no elements");

                assertNull(iterator1.next(), "First instance next() should return null");
                assertNull(iterator2.next(), "Second instance next() should return null");

        // Test first host
        NbtAddress result = lmhosts.getByName("TESTHOST", mockContext);
        assertNotNull(result);
        assertEquals("TESTHOST", result.getHostName());

        // Test second host
        result = lmhosts.getByName("SERVER01", mockContext);
        assertNotNull(result);
        assertEquals("SERVER01", result.getHostName());
    }

    @Test

        byte[] data1 = new byte[] { 0x01, 0x02, 0x03, 0x04 };
        digest.update(data1, 0, data1.length);
        byte[] result1 = digest.digest();
        assertNotNull(result1);

        // Second cycle
        byte[] data2 = new byte[] { 0x05, 0x06, 0x07, 0x08 };
        digest.update(data2, 0, data2.length);
        byte[] result2 = digest.digest();
        assertNotNull(result2);

        assertNotNull(result1);
        assertFalse(result1.hasFailure());

        runner.refresh();

        // Second write with update
        SuggestItem updatedItem = new SuggestItem(new String[] { "テスト" }, readings, new String[] { "content" }, 2, 0, -1,

            byte[] buffer1 = new byte[1024];
            int bytesRead1 = stream1.read(buffer1);
            assertEquals(testContent, new String(buffer1, 0, bytesRead1, "UTF-8"));
        }

        // Second read - should work independently
        try (InputStream stream2 = cache.getInputStream()) {
            byte[] buffer2 = new byte[1024];
            int bytesRead2 = stream2.read(buffer2);

    private static final int DEFAULT_HEALTH_CHECK_INTERVAL = 60000; // 1 minute in ms
    private static final int DEFAULT_PROACTIVE_CHECK_INTERVAL = 30000; // 30 seconds in ms
    private int maxPoolSize = DEFAULT_MAX_POOL_SIZE;
    private int maxIdleTime = DEFAULT_MAX_IDLE_TIME;
    private int healthCheckInterval = DEFAULT_HEALTH_CHECK_INTERVAL;