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

See gh-47263

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

@@ -45,3 +45,7 @@ dependencies {
 	testRuntimeOnly("com.zaxxer:HikariCP")
 	testRuntimeOnly("jakarta.servlet:jakarta.servlet-api")
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}

module/spring-boot-data-commons/src/test/java/org/springframework/boot/data/metrics/DefaultRepositoryTagsProviderTests.java

@@ -20,6 +20,7 @@ import java.io.IOException;
 import java.lang.reflect.Method;
 
 import io.micrometer.core.instrument.Tag;
+import org.jspecify.annotations.Nullable;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.data.repository.Repository;
@@ -80,9 +81,10 @@ class DefaultRepositoryTagsProviderTests {
 		return createInvocation(null);
 	}
 
-	private RepositoryMethodInvocation createInvocation(Throwable error) {
+	private RepositoryMethodInvocation createInvocation(@Nullable Throwable error) {
 		Class<?> repositoryInterface = ExampleRepository.class;
 		Method method = ReflectionUtils.findMethod(repositoryInterface, "findById", long.class);
+		assertThat(method).isNotNull();
 		RepositoryMethodInvocationResult result = mock(RepositoryMethodInvocationResult.class);
 		given(result.getState()).willReturn((error != null) ? State.ERROR : State.SUCCESS);
 		given(result.getError()).willReturn(error);

module/spring-boot-data-commons/src/test/java/org/springframework/boot/data/metrics/MetricsRepositoryMethodInvocationListenerTests.java

@@ -90,6 +90,7 @@ class MetricsRepositoryMethodInvocationListenerTests {
 
 	private RepositoryMethodInvocation createInvocation(Class<?> repositoryInterface) {
 		Method method = ReflectionUtils.findMethod(repositoryInterface, "findById", long.class);
+		assertThat(method).isNotNull();
 		RepositoryMethodInvocationResult result = mock(RepositoryMethodInvocationResult.class);
 		given(result.getState()).willReturn(State.SUCCESS);
 		return new RepositoryMethodInvocation(repositoryInterface, method, result, 0);

module/spring-boot-data-commons/src/test/java/org/springframework/boot/data/metrics/TimedAnnotationsTests.java

@@ -37,6 +37,7 @@ class TimedAnnotationsTests {
 	void getWhenNoneReturnsEmptySet() {
 		Object bean = new None();
 		Method method = ReflectionUtils.findMethod(bean.getClass(), "handle");
+		assertThat(method).isNotNull();
 		Set<Timed> annotations = TimedAnnotations.get(method, bean.getClass());
 		assertThat(annotations).isEmpty();
 	}
@@ -45,6 +46,7 @@ class TimedAnnotationsTests {
 	void getWhenOnMethodReturnsMethodAnnotations() {
 		Object bean = new OnMethod();
 		Method method = ReflectionUtils.findMethod(bean.getClass(), "handle");
+		assertThat(method).isNotNull();
 		Set<Timed> annotations = TimedAnnotations.get(method, bean.getClass());
 		assertThat(annotations).extracting(Timed::value).containsOnly("y", "z");
 	}
@@ -53,6 +55,7 @@ class TimedAnnotationsTests {
 	void getWhenNonOnMethodReturnsBeanAnnotations() {
 		Object bean = new OnBean();
 		Method method = ReflectionUtils.findMethod(bean.getClass(), "handle");
+		assertThat(method).isNotNull();
 		Set<Timed> annotations = TimedAnnotations.get(method, bean.getClass());
 		assertThat(annotations).extracting(Timed::value).containsOnly("y", "z");
 	}