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

See gh-47263

Author: mhalbritter

module/spring-boot-liquibase/build.gradle

@@ -56,3 +56,11 @@ dependencies {
 testRuntimeOnly("ch.qos.logback:logback-classic")
 testRuntimeOnly("org.postgresql:postgresql")
 }
+
+tasks.named("compileTestJava") {
+options.nullability.checking = "tests"
+}
+
+tasks.named("compileDockerTestJava") {
+options.nullability.checking = "tests"
+}

module/spring-boot-liquibase/src/test/java/org/springframework/boot/liquibase/LiquibaseChangelogMissingFailureAnalyzerTests.java

@@ -20,6 +20,7 @@
 
 import com.zaxxer.hikari.HikariDataSource;
 import liquibase.integration.spring.SpringLiquibase;
+import org.jspecify.annotations.Nullable;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.factory.BeanCreationException;
@@ -40,20 +41,21 @@ class LiquibaseChangelogMissingFailureAnalyzerTests {
 @Test
 void changelogParseExceptionDueToChangelogNotPresent() {
 FailureAnalysis analysis = performAnalysis();
+assertThat(analysis).isNotNull();
 assertThat(analysis.getDescription())
 .isEqualTo("Liquibase failed to start because no changelog could be found at '"
 + "classpath:/db/changelog/db.changelog-master.yaml'.");
 assertThat(analysis.getAction())
 .isEqualTo("Make sure a Liquibase changelog is present at the configured path.");
 }
 
-private FailureAnalysis performAnalysis() {
+private @Nullable FailureAnalysis performAnalysis() {
 BeanCreationException failure = createFailure();
 assertThat(failure).isNotNull();
 return new LiquibaseChangelogMissingFailureAnalyzer().analyze(failure);
 }
 
-private BeanCreationException createFailure() {
+private @Nullable BeanCreationException createFailure() {
 try (AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(
 LiquibaseConfiguration.class)) {
 return null;

module/spring-boot-liquibase/src/test/java/org/springframework/boot/liquibase/autoconfigure/LiquibaseAutoConfigurationTests.java

@@ -25,6 +25,7 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.sql.Connection;
+import java.sql.Driver;
 import java.sql.SQLException;
 import java.util.Map;
 import java.util.UUID;
@@ -334,7 +335,9 @@ void overrideDataSource() {
 .run(assertLiquibase((liquibase) -> {
 SimpleDriverDataSource dataSource = (SimpleDriverDataSource) liquibase.getDataSource();
 assertThat(dataSource.getUrl()).isEqualTo(jdbcUrl);
-assertThat(dataSource.getDriver().getClass().getName()).isEqualTo("org.h2.Driver");
+Driver driver = dataSource.getDriver();
+assertThat(driver).isNotNull();
+assertThat(driver.getClass().getName()).isEqualTo("org.h2.Driver");
 }));
 }
 
@@ -349,7 +352,9 @@ void overrideDataSourceAndDriverClassName() {
 .run(assertLiquibase((liquibase) -> {
 SimpleDriverDataSource dataSource = (SimpleDriverDataSource) liquibase.getDataSource();
 assertThat(dataSource.getUrl()).isEqualTo(jdbcUrl);
-assertThat(dataSource.getDriver().getClass().getName()).isEqualTo(driverClassName);
+Driver driver = dataSource.getDriver();
+assertThat(driver).isNotNull();
+assertThat(driver.getClass().getName()).isEqualTo(driverClassName);
 }));
 }