@Test
	void testMultipleRegistrations() {
		instanceRegistry.register(firstInstanceInfo, false);
		instanceRegistry.register(secondInstanceInfo, false);

		final Map<Tags, Long> counts = Map.of(tags(firstInstanceInfo), 1L, tags(secondInstanceInfo), 1L);
		assertEurekaInstance(counts);
	}
Tests for {@link EurekaInstanceMonitor} with custom tags provider.

@author Wonchul Heo
@author Olga Maciaszek-Sharma
spring-cloud-netflix-eureka-server/src/test/java/org/springframework/cloud/netflix/eureka/server/EurekaInstanceMonitorWithCustomTagsProviderTests.java