private InetSocketAddress nextUnusedAddr() {
		LAST_SERVER_PORT_NUM++;
		return new InetSocketAddress(InetAddress.getLoopbackAddress(), LAST_SERVER_PORT_NUM);
	}
Tests the LibreTranslateStringTranslationService by creating a mock HTTP server that responds
to the minimal requests the service needs.
Ghidra/Features/Base/src/test.slow/java/ghidra/app/plugin/core/string/translate/libretranslate/LibreTranslateStringTranslationServiceTest.java