Register runtime hints for @TestPropertySource#locations

This commit introduces automatic registration of runtime hints for
classpath resources configured via the `locations` attribute in
@TestPropertySource as well as for detected default properties files.

Closes gh-29025

spring-test/src/main/java/org/springframework/test/context/aot/TestContextAotGenerator.java

@@ -248,12 +248,21 @@ public class TestContextAotGenerator {
 
 		// @ContextConfiguration(locations = ...)
 		registerHintsForClasspathResources(mergedConfig.getLocations());
+
+		// @TestPropertySource(locations = ... )
+		registerHintsForClasspathResources(mergedConfig.getPropertySourceLocations());
 	}
 
 	private void registerHintsForClasspathResources(String... locations) {
 		Arrays.stream(locations)
 				.filter(location -> location.startsWith(CLASSPATH_URL_PREFIX))
-				.map(location -> location.substring(CLASSPATH_URL_PREFIX.length()))
+				.map(location -> {
+					location = location.substring(CLASSPATH_URL_PREFIX.length());
+					if (!location.startsWith("/")) {
+						location = "/" + location;
+					}
+					return location;
+				})
 				.forEach(this.runtimeHints.resources()::registerPattern);
 	}
 

spring-test/src/test/java/org/springframework/test/context/aot/TestContextAotGeneratorTests.java

@@ -171,6 +171,10 @@ class TestContextAotGeneratorTests extends AbstractAotTests {
 		// @ContextConfiguration(locations=...)
 		assertThat(resource().forResource("/org/springframework/test/context/aot/samples/xml/test-config.xml"))
 			.accepts(runtimeHints);
+
+		// @TestPropertySource(locations = ... )
+		assertThat(resource().forResource("/org/springframework/test/context/aot/samples/basic/BasicSpringVintageTests.properties"))
+			.accepts(runtimeHints);
 	}
 
 	private static void assertReflectionRegistered(RuntimeHints runtimeHints, String type, MemberCategory memberCategory) {

spring-test/src/test/java/org/springframework/test/context/aot/samples/basic/BasicSpringVintageTests.java

@@ -42,7 +42,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 @RunWith(SpringRunner.class)
 // Override the default loader configured by the CustomXmlBootstrapper
 @ContextConfiguration(classes = BasicTestConfiguration.class, loader = AnnotationConfigContextLoader.class)
-@TestPropertySource(properties = "test.engine = vintage")
+@TestPropertySource
 public class BasicSpringVintageTests {
 
 	@Autowired

spring-test/src/test/resources/org/springframework/test/context/aot/samples/basic/BasicSpringVintageTests.properties

@@ -0,0 +1 @@
+test.engine = vintage