Resolve TODOs for observability tests

See gh-33481

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/observation/web/client/RestTemplateObservationConfigurationTests.java

@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.autoconfigure.observation.web.client;
 
 import io.micrometer.common.KeyValues;
+import io.micrometer.core.instrument.MeterRegistry;
 import io.micrometer.core.instrument.Tag;
 import io.micrometer.core.instrument.Tags;
 import io.micrometer.observation.ObservationRegistry;
@@ -134,7 +135,6 @@ class RestTemplateObservationConfigurationTests {
 	void afterMaxUrisReachedFurtherUrisAreDenied(CapturedOutput output) {
 		this.contextRunner.with(MetricsRun.simple()).withPropertyValues("management.metrics.web.client.max-uri-tags=2")
 				.run((context) -> {
-
 					RestTemplate restTemplate = context.getBean(RestTemplateBuilder.class).build();
 					MockRestServiceServer server = MockRestServiceServer.createServer(restTemplate);
 					for (int i = 0; i < 3; i++) {
@@ -144,8 +144,10 @@ class RestTemplateObservationConfigurationTests {
 						restTemplate.getForObject("/test/" + i, String.class);
 					}
 					TestObservationRegistry registry = context.getBean(TestObservationRegistry.class);
-					TestObservationRegistryAssert.assertThat(registry);
-					// TODO: check observation count for name
+					TestObservationRegistryAssert.assertThat(registry)
+							.hasNumberOfObservationsWithNameEqualTo("http.client.requests", 3);
+					MeterRegistry meterRegistry = context.getBean(MeterRegistry.class);
+					assertThat(meterRegistry.find("http.client.requests").timers()).hasSize(2);
 					assertThat(output).contains("Reached the maximum number of URI tags for 'http.client.requests'.")
 							.contains("Are you using 'uriVariables'?");
 				});

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/observation/web/client/WebClientObservationConfigurationTests.java

@@ -19,6 +19,7 @@ package org.springframework.boot.actuate.autoconfigure.observation.web.client;
 import java.time.Duration;
 
 import io.micrometer.common.KeyValues;
+import io.micrometer.core.instrument.MeterRegistry;
 import io.micrometer.observation.ObservationRegistry;
 import io.micrometer.observation.tck.TestObservationRegistry;
 import io.micrometer.observation.tck.TestObservationRegistryAssert;
@@ -105,8 +106,12 @@ class WebClientObservationConfigurationTests {
 	void afterMaxUrisReachedFurtherUrisAreDenied(CapturedOutput output) {
 		this.contextRunner.withPropertyValues("management.metrics.web.client.max-uri-tags=2").run((context) -> {
 			TestObservationRegistry registry = getInitializedRegistry(context);
-			// TODO check size is 2
-			TestObservationRegistryAssert.assertThat(registry).hasObservationWithNameEqualTo("http.client.requests");
+			TestObservationRegistryAssert.assertThat(registry)
+					.hasNumberOfObservationsWithNameEqualTo("http.client.requests", 3);
+			MeterRegistry meterRegistry = context.getBean(MeterRegistry.class);
+			assertThat(meterRegistry.find("http.client.requests").timers()).hasSize(1);
+			// MeterFilter.maximumAllowableTags() works with prefix matching.
+			assertThat(meterRegistry.find("http.client.requests.active").longTaskTimers()).hasSize(1);
 			assertThat(output).contains("Reached the maximum number of URI tags for 'http.client.requests'.")
 					.contains("Are you using 'uriVariables'?");
 		});
@@ -116,8 +121,10 @@ class WebClientObservationConfigurationTests {
 	void shouldNotDenyNorLogIfMaxUrisIsNotReached(CapturedOutput output) {
 		this.contextRunner.withPropertyValues("management.metrics.web.client.max-uri-tags=5").run((context) -> {
 			TestObservationRegistry registry = getInitializedRegistry(context);
-			// TODO check size is 3
-			TestObservationRegistryAssert.assertThat(registry).hasObservationWithNameEqualTo("http.client.requests");
+			TestObservationRegistryAssert.assertThat(registry)
+					.hasNumberOfObservationsWithNameEqualTo("http.client.requests", 3);
+			MeterRegistry meterRegistry = context.getBean(MeterRegistry.class);
+			assertThat(meterRegistry.find("http.client.requests").timers()).hasSize(3);
 			assertThat(output).doesNotContain("Reached the maximum number of URI tags for 'http.client.requests'.")
 					.doesNotContain("Are you using 'uriVariables'?");
 		});