Add nullability annotations to tests in module/spring-boot-data-ldap

See gh-47263

module/spring-boot-data-ldap/build.gradle

@@ -38,3 +38,7 @@ dependencies {
 
 	testRuntimeOnly("ch.qos.logback:logback-classic")
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}

module/spring-boot-data-ldap/src/test/java/org/springframework/boot/data/ldap/autoconfigure/DataLdapRepositoriesAutoConfigurationTests.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.data.ldap.autoconfigure;
 
+import org.jspecify.annotations.Nullable;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 
@@ -39,31 +40,31 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 class DataLdapRepositoriesAutoConfigurationTests {
 
-	private AnnotationConfigApplicationContext context;
+	private @Nullable AnnotationConfigApplicationContext context;
 
 	@AfterEach
 	void close() {
-		if (this.context != null) {
-			this.context.close();
+		if (getContext() != null) {
+			getContext().close();
 		}
 	}
 
 	@Test
 	void testDefaultRepositoryConfiguration() {
 		load(TestConfiguration.class);
-		assertThat(this.context.getBean(PersonRepository.class)).isNotNull();
+		assertThat(getContext().getBean(PersonRepository.class)).isNotNull();
 	}
 
 	@Test
 	void testNoRepositoryConfiguration() {
 		load(EmptyConfiguration.class);
-		assertThat(this.context.getBeanNamesForType(PersonRepository.class)).isEmpty();
+		assertThat(getContext().getBeanNamesForType(PersonRepository.class)).isEmpty();
 	}
 
 	@Test
 	void doesNotTriggerDefaultRepositoryDetectionIfCustomized() {
 		load(CustomizedConfiguration.class);
-		assertThat(this.context.getBean(PersonRepository.class)).isNotNull();
+		assertThat(getContext().getBean(PersonRepository.class)).isNotNull();
 	}
 
 	private void load(Class<?>... configurationClasses) {
@@ -75,6 +76,12 @@ class DataLdapRepositoriesAutoConfigurationTests {
 		this.context.refresh();
 	}
 
+	private AnnotationConfigApplicationContext getContext() {
+		AnnotationConfigApplicationContext context = this.context;
+		assertThat(context).isNotNull();
+		return context;
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	@TestAutoConfigurationPackage(Person.class)
 	static class TestConfiguration {