Add nullability annotations to tests in module/spring-boot-jooq

See gh-47263

module/spring-boot-jooq/build.gradle

@@ -43,3 +43,7 @@ dependencies {
 	testRuntimeOnly("org.glassfish.jaxb:jaxb-runtime")
 	testRuntimeOnly("org.hsqldb:hsqldb")
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}

module/spring-boot-jooq/src/test/java/org/springframework/boot/jooq/autoconfigure/DefaultExceptionTranslatorExecuteListenerTests.java

@@ -50,6 +50,7 @@ class DefaultExceptionTranslatorExecuteListenerTests {
 	private final ExceptionTranslatorExecuteListener listener = new DefaultExceptionTranslatorExecuteListener();
 
 	@Test
+	@SuppressWarnings("NullAway") // Test null check
 	void createWhenTranslatorFactoryIsNullThrowsException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new DefaultExceptionTranslatorExecuteListener(
@@ -74,7 +75,7 @@ class DefaultExceptionTranslatorExecuteListenerTests {
 
 	@Test
 	void exceptionWhenHasCustomTranslatorFactory() {
-		SQLExceptionTranslator translator = BadSqlGrammarException::new;
+		SQLExceptionTranslator translator = (task, sql, ex) -> new BadSqlGrammarException(task, "sql", ex);
 		ExceptionTranslatorExecuteListener listener = new DefaultExceptionTranslatorExecuteListener(
 				(context) -> translator);
 		SQLException sqlException = sqlException(123);

module/spring-boot-jooq/src/test/java/org/springframework/boot/jooq/autoconfigure/JooqAutoConfigurationTests.java

@@ -361,7 +361,7 @@ class JooqAutoConfigurationTests {
 
 		@Override
 		public ExecuteListener provide() {
-			return null;
+			return mock(ExecuteListener.class);
 		}
 
 	}

module/spring-boot-jooq/src/test/java/org/springframework/boot/jooq/autoconfigure/JooqPropertiesTests.java

@@ -23,6 +23,7 @@ import java.sql.SQLException;
 import javax.sql.DataSource;
 
 import org.jooq.SQLDialect;
+import org.jspecify.annotations.Nullable;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 
@@ -44,7 +45,7 @@ import static org.mockito.Mockito.never;
  */
 class JooqPropertiesTests {
 
-	private AnnotationConfigApplicationContext context;
+	private @Nullable AnnotationConfigApplicationContext context;
 
 	@AfterEach
 	void close() {