@Test
	public void testDefaultValues() {
		FallbackProperties properties = new FallbackProperties();
		Assert.assertNull(properties.getMode());
		Assert.assertNull(properties.getRedirect());
		Assert.assertNull(properties.getResponseBody());
		Assert.assertEquals(HttpStatus.TOO_MANY_REQUESTS.value(), properties.getResponseStatus().intValue());
		Assert.assertEquals(MediaType.APPLICATION_JSON.toString(), properties.getContentType());
	}
This test method checks the default values of a FallbackProperties object.
It verifies that certain properties are not set (null) and others have default values.
spring-cloud-alibaba-starters/spring-cloud-alibaba-sentinel-gateway/src/test/java/com/alibaba/cloud/sentinel/gateway/FallbackPropertiesTest.java