Add nullability annotations to tests in core/spring-boot-properties-migrator

See gh-47263

core/spring-boot-properties-migrator/build.gradle

@@ -34,4 +34,8 @@ dependencies {
 tasks.named("javadoc").configure {
 	// No public or protected classes
 	enabled = false
-}
+}
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}

core/spring-boot-properties-migrator/src/test/java/org/springframework/boot/context/properties/migrator/PropertiesMigrationListenerTests.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.context.properties.migrator;
 
+import org.jspecify.annotations.Nullable;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
@@ -36,7 +37,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 @ExtendWith(OutputCaptureExtension.class)
 class PropertiesMigrationListenerTests {
 
-	private ConfigurableApplicationContext context;
+	private @Nullable ConfigurableApplicationContext context;
 
 	@AfterEach
 	void closeContext() {

core/spring-boot-properties-migrator/src/test/java/org/springframework/boot/context/properties/migrator/PropertiesMigrationReporterTests.java

@@ -23,6 +23,7 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 
+import org.jspecify.annotations.Nullable;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.configurationmetadata.ConfigurationMetadataRepository;
@@ -230,12 +231,13 @@ class PropertiesMigrationReporterTests {
 	}
 
 	@SuppressWarnings("unchecked")
-	private Origin getOrigin(PropertySource<?> propertySource, String name) {
+	private @Nullable Origin getOrigin(PropertySource<?> propertySource, String name) {
 		return ((OriginLookup<String>) propertySource).getOrigin(name);
 	}
 
 	@SuppressWarnings("unchecked")
-	private void assertMappedProperty(PropertySource<?> propertySource, String name, Object value, Origin origin) {
+	private void assertMappedProperty(PropertySource<?> propertySource, String name, Object value,
+			@Nullable Origin origin) {
 		assertThat(propertySource.containsProperty(name)).isTrue();
 		assertThat(propertySource.getProperty(name)).isEqualTo(value);
 		if (origin != null) {
@@ -269,11 +271,11 @@ class PropertiesMigrationReporterTests {
 		}
 	}
 
-	private String createWarningReport(ConfigurationMetadataRepository repository) {
+	private @Nullable String createWarningReport(ConfigurationMetadataRepository repository) {
 		return createAnalyzer(repository).getReport().getWarningReport();
 	}
 
-	private String createErrorReport(ConfigurationMetadataRepository repository) {
+	private @Nullable String createErrorReport(ConfigurationMetadataRepository repository) {
 		return createAnalyzer(repository).getReport().getErrorReport();
 	}