Re-enable Spring Pulsar interceptor tests

The PulsarTemplate recently replaced its list of ProducerInterceptors
with a list of ProducerBuilderCustomizers that customize the builder by
adding each interceptor to the builder. The PulsarAutoConfigurationTests
previosuly relied on the previous field. This commit adjusts the tests
to instead use the Customizers testing utility to verify the
interceptors.

See gh-39912

Author: onobc

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/pulsar/PulsarAutoConfigurationTests.java

@@ -27,8 +27,6 @@
 import org.apache.pulsar.client.api.ReaderBuilder;
 import org.apache.pulsar.client.api.interceptor.ProducerInterceptor;
 import org.apache.pulsar.common.schema.SchemaType;
-import org.assertj.core.api.InstanceOfAssertFactories;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.condition.EnabledForJreRange;
@@ -285,24 +283,29 @@ void injectsExpectedBeans() {
 		}
 
 		@Test
-		@Disabled("Changes in https://github.com/spring-projects/spring-pulsar/issues/593 prevent introspection of the interceptors")
-		void whenHasUseDefinedProducerInterceptorInjectsBean() {
+		<T> void whenHasUseDefinedProducerInterceptorInjectsBean() {
 			ProducerInterceptor interceptor = mock(ProducerInterceptor.class);
 			this.contextRunner.withBean("customProducerInterceptor", ProducerInterceptor.class, () -> interceptor)
-				.run((context) -> assertThat(context).getBean(PulsarTemplate.class)
-					.extracting("interceptorsCustomizers")
-					.asInstanceOf(InstanceOfAssertFactories.LIST)
-					.contains(interceptor));
+				.run((context) -> {
+					PulsarTemplate<?> pulsarTemplate = context.getBean(PulsarTemplate.class);
+					Customizers<ProducerBuilderCustomizer<T>, ProducerBuilder<T>> customizers = Customizers
+						.of(ProducerBuilder.class, ProducerBuilderCustomizer::customize);
+					assertThat(customizers.fromField(pulsarTemplate, "interceptorsCustomizers"))
+						.callsInOrder(ProducerBuilder::intercept, interceptor);
+				});
 		}
 
 		@Test
-		@Disabled("Changes in https://github.com/spring-projects/spring-pulsar/issues/593 prevent introspection of the interceptors")
-		void whenHasUseDefinedProducerInterceptorsInjectsBeansInCorrectOrder() {
-			this.contextRunner.withUserConfiguration(InterceptorTestConfiguration.class)
-				.run((context) -> assertThat(context).getBean(PulsarTemplate.class)
-					.extracting("interceptorsCustomizers")
-					.asInstanceOf(InstanceOfAssertFactories.LIST)
-					.containsExactly(context.getBean("interceptorBar"), context.getBean("interceptorFoo")));
+		<T> void whenHasUseDefinedProducerInterceptorsInjectsBeansInCorrectOrder() {
+			this.contextRunner.withUserConfiguration(InterceptorTestConfiguration.class).run((context) -> {
+				ProducerInterceptor interceptorFoo = context.getBean("interceptorFoo", ProducerInterceptor.class);
+				ProducerInterceptor interceptorBar = context.getBean("interceptorBar", ProducerInterceptor.class);
+				PulsarTemplate<?> pulsarTemplate = context.getBean(PulsarTemplate.class);
+				Customizers<ProducerBuilderCustomizer<T>, ProducerBuilder<T>> customizers = Customizers
+					.of(ProducerBuilder.class, ProducerBuilderCustomizer::customize);
+				assertThat(customizers.fromField(pulsarTemplate, "interceptorsCustomizers"))
+					.callsInOrder(ProducerBuilder::intercept, interceptorBar, interceptorFoo);
+			});
 		}
 
 		@Test