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

See gh-47263

module/spring-boot-flyway/build.gradle

@@ -58,8 +58,18 @@ dependencies {
 	testImplementation("org.postgresql:postgresql")
 	testImplementation("org.springframework:spring-orm")
 
+	testCompileOnly("org.checkerframework:checker-qual")
+
 	testRuntimeOnly("ch.qos.logback:logback-classic")
 	testRuntimeOnly("com.h2database:h2")
 	testRuntimeOnly("com.zaxxer:HikariCP")
 	testRuntimeOnly("org.flywaydb:flyway-database-hsqldb")
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}
+
+tasks.named("compileDockerTestJava") {
+	options.nullability.checking = "tests"
+}

module/spring-boot-flyway/src/test/java/org/springframework/boot/flyway/autoconfigure/FlywayAutoConfigurationTests.java

@@ -43,6 +43,7 @@ import org.flywaydb.core.api.callback.Event;
 import org.flywaydb.core.api.configuration.FluentConfiguration;
 import org.flywaydb.core.api.migration.JavaMigration;
 import org.flywaydb.core.api.pattern.ValidatePattern;
+import org.flywaydb.core.internal.configuration.models.ResolvedEnvironment;
 import org.flywaydb.core.internal.license.FlywayEditionUpgradeRequiredException;
 import org.flywaydb.database.oracle.OracleConfigurationExtension;
 import org.flywaydb.database.postgresql.PostgreSQLConfigurationExtension;
@@ -393,7 +394,9 @@ class FlywayAutoConfigurationTests {
 				Flyway flyway = context.getBean(Flyway.class);
 				SimpleDriverDataSource dataSource = (SimpleDriverDataSource) flyway.getConfiguration().getDataSource();
 				assertThat(dataSource.getUrl()).isEqualTo(jdbcUrl);
-				assertThat(dataSource.getDriver().getClass().getName()).isEqualTo(driverClassName);
+				java.sql.Driver driver = dataSource.getDriver();
+				assertThat(driver).isNotNull();
+				assertThat(driver.getClass().getName()).isEqualTo(driverClassName);
 			});
 	}
 
@@ -737,10 +740,11 @@ class FlywayAutoConfigurationTests {
 			.withPropertyValues("spring.flyway.jdbc-properties.prop=value")
 			.run((context) -> {
 				Flyway flyway = context.getBean(Flyway.class);
-				assertThat(flyway.getConfiguration()
+				ResolvedEnvironment environment = flyway.getConfiguration()
 					.getCachedResolvedEnvironments()
-					.get(flyway.getConfiguration().getCurrentEnvironmentName())
-					.getJdbcProperties()).containsEntry("prop", "value");
+					.get(flyway.getConfiguration().getCurrentEnvironmentName());
+				assertThat(environment).isNotNull();
+				assertThat(environment.getJdbcProperties()).containsEntry("prop", "value");
 			});
 	}
 
@@ -1216,7 +1220,9 @@ class FlywayAutoConfigurationTests {
 
 		@Override
 		protected String getDatabaseName(DataSourceProperties properties) {
-			return properties.determineDatabaseName();
+			String result = properties.determineDatabaseName();
+			assertThat(result).isNotNull();
+			return result;
 		}
 
 	}
@@ -1356,18 +1362,23 @@ class FlywayAutoConfigurationTests {
 
 		@Id
 		@GeneratedValue
+		@SuppressWarnings("NullAway.Init")
 		private Long id;
 
 		@Column(nullable = false)
+		@SuppressWarnings("NullAway.Init")
 		private String name;
 
 		@Column(nullable = false)
+		@SuppressWarnings("NullAway.Init")
 		private String state;
 
 		@Column(nullable = false)
+		@SuppressWarnings("NullAway.Init")
 		private String country;
 
 		@Column(nullable = false)
+		@SuppressWarnings("NullAway.Init")
 		private String map;
 
 		protected City() {

module/spring-boot-flyway/src/test/java/org/springframework/boot/flyway/endpoint/FlywayEndpointTests.java

@@ -23,6 +23,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.flyway.autoconfigure.FlywayAutoConfiguration;
 import org.springframework.boot.flyway.autoconfigure.FlywayMigrationStrategy;
+import org.springframework.boot.flyway.endpoint.FlywayEndpoint.ContextFlywayBeansDescriptor;
 import org.springframework.boot.flyway.endpoint.FlywayEndpoint.FlywayDescriptor;
 import org.springframework.boot.jdbc.autoconfigure.EmbeddedDataSourceConfiguration;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
@@ -50,11 +51,12 @@ class FlywayEndpointTests {
 	@Test
 	void flywayReportIsProduced() {
 		this.contextRunner.run((context) -> {
-			Map<String, FlywayDescriptor> flywayBeans = context.getBean(FlywayEndpoint.class)
+			ContextFlywayBeansDescriptor descriptor = context.getBean(FlywayEndpoint.class)
 				.flywayBeans()
 				.getContexts()
-				.get(context.getId())
-				.getFlywayBeans();
+				.get(context.getId());
+			assertThat(descriptor).isNotNull();
+			Map<String, FlywayDescriptor> flywayBeans = descriptor.getFlywayBeans();
 			assertThat(flywayBeans).hasSize(1);
 			assertThat(flywayBeans.values().iterator().next().getMigrations()).hasSize(3);
 		});
@@ -68,11 +70,12 @@ class FlywayEndpointTests {
 				flyway.migrate();
 			})
 			.run((context) -> {
-				Map<String, FlywayDescriptor> flywayBeans = context.getBean(FlywayEndpoint.class)
+				ContextFlywayBeansDescriptor descriptor = context.getBean(FlywayEndpoint.class)
 					.flywayBeans()
 					.getContexts()
-					.get(context.getId())
-					.getFlywayBeans();
+					.get(context.getId());
+				assertThat(descriptor).isNotNull();
+				Map<String, FlywayDescriptor> flywayBeans = descriptor.getFlywayBeans();
 				assertThat(flywayBeans).hasSize(1);
 				assertThat(flywayBeans.values().iterator().next().getMigrations()).hasSize(4);
 			});