assertTrue(result.getContent().contains("テスト"));
        }
    }

    /**
     * Test that MsExcelExtractor properly closes resources on successful extraction.
     */
    public void test_MsExcelExtractor_closesResourcesOnSuccess() throws IOException {
        final MsExcelExtractor extractor = container.getComponent("msExcelExtractor");
        final AtomicBoolean streamClosed = new AtomicBoolean(false);