assertTrue("Should contain stack trace information", hasStackTraceLine);

        } finally {
            Files.deleteIfExists(tempFile);
        }
    }

    @Test
    public void test_constructor_isProtected() {
        // Verify that ThreadDumpUtil has a protected constructor (utility class pattern)
        try {
            Constructor<ThreadDumpUtil> constructor = ThreadDumpUtil.class.getDeclaredConstructor();