@Test
	public void testInit() {
		config.init();
		verify(gatewayProperties).getFallback(); // Check if fallback properties are fetched
		Assert.assertNotNull(config.sentinelGatewayBlockExceptionHandler());
		Assert.assertNotNull(config.sentinelGatewayFilter());
	}
Tests the initialization method to ensure that fallback properties are fetched
and the block exception handler and gateway filter are properly configured.
spring-cloud-alibaba-starters/spring-cloud-alibaba-sentinel-gateway/src/test/java/com/alibaba/cloud/sentinel/gateway/scg/SentinelSCGAutoConfigurationTest.java