Register hints for @TestPropertySource factory

This commit updates MergedContextConfigurationRuntimeHints so that it
registers hints for a custom PropertySourceFactory.

Closes gh-31160

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

@@ -55,6 +55,7 @@ import org.springframework.test.context.aot.samples.web.WebSpringVintageTests;
 import org.springframework.test.context.aot.samples.xml.XmlSpringJupiterTests;
 import org.springframework.test.context.aot.samples.xml.XmlSpringTestNGTests;
 import org.springframework.test.context.aot.samples.xml.XmlSpringVintageTests;
+import org.springframework.test.context.env.YamlPropertySourceFactory;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.util.function.ThrowingConsumer;
 import org.springframework.web.context.WebApplicationContext;
@@ -213,8 +214,20 @@ class TestContextAotGeneratorTests extends AbstractAotTests {
 
 		// @TestPropertySource(locations = ...)
 		assertThat(resource().forResource("org/springframework/test/context/aot/samples/basic/BasicSpringVintageTests.properties"))
+			.as("@TestPropertySource(locations)")
 			.accepts(runtimeHints);
 
+		// @YamlTestProperties(...)
+		assertThat(resource().forResource("org/springframework/test/context/aot/samples/basic/test1.yaml"))
+			.as("@YamlTestProperties: test1.yaml")
+			.accepts(runtimeHints);
+		assertThat(resource().forResource("org/springframework/test/context/aot/samples/basic/test2.yaml"))
+			.as("@YamlTestProperties: test2.yaml")
+			.accepts(runtimeHints);
+
+		// @TestPropertySource(factory = ...)
+		assertReflectionRegistered(runtimeHints, YamlPropertySourceFactory.class.getName(), INVOKE_DECLARED_CONSTRUCTORS);
+
 		// @WebAppConfiguration(value = ...)
 		assertThat(resource().forResource("META-INF/web-resources/resources/Spring.js")).accepts(runtimeHints);
 		assertThat(resource().forResource("META-INF/web-resources/WEB-INF/views/home.jsp")).accepts(runtimeHints);

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

@@ -22,6 +22,7 @@ import org.springframework.context.ApplicationContext;
 import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.aot.samples.common.MessageService;
 import org.springframework.test.context.aot.samples.management.ManagementConfiguration;
+import org.springframework.test.context.env.YamlTestProperties;
 import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -34,9 +35,16 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Sam Brannen
  * @since 6.0
+ * @see BasicSpringJupiterTests
  */
 @SpringJUnitConfig({BasicTestConfiguration.class, ManagementConfiguration.class})
 @TestPropertySource(properties = "test.engine = jupiter")
+// We cannot use `classpath*:` in AOT tests until gh-31088 is resolved.
+// @YamlTestProperties("classpath*:org/springframework/test/context/aot/samples/basic/**/test?.yaml")
+@YamlTestProperties({
+	"classpath:org/springframework/test/context/aot/samples/basic/test1.yaml",
+	"classpath:org/springframework/test/context/aot/samples/basic/test2.yaml"
+})
 public class BasicSpringJupiterSharedConfigTests {
 
 	@Autowired
@@ -52,8 +60,7 @@ public class BasicSpringJupiterSharedConfigTests {
 	void test() {
 		assertThat(messageService.generateMessage()).isEqualTo("Hello, AOT!");
 		assertThat(testEngine).isEqualTo("jupiter");
-		assertThat(context.getEnvironment().getProperty("test.engine"))
-			.as("@TestPropertySource").isEqualTo("jupiter");
+		BasicSpringJupiterTests.assertEnvProperties(context);
 	}
 
 }

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

@@ -21,12 +21,14 @@ import org.junit.jupiter.api.Nested;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.ApplicationContext;
+import org.springframework.core.env.Environment;
 import org.springframework.test.context.ActiveProfiles;
 import org.springframework.test.context.TestExecutionListeners;
 import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.aot.samples.basic.BasicSpringJupiterTests.DummyTestExecutionListener;
 import org.springframework.test.context.aot.samples.common.MessageService;
 import org.springframework.test.context.aot.samples.management.ManagementConfiguration;
+import org.springframework.test.context.env.YamlTestProperties;
 import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
 import org.springframework.test.context.support.AbstractTestExecutionListener;
 
@@ -42,10 +44,17 @@ import static org.springframework.test.context.TestExecutionListeners.MergeMode.
  *
  * @author Sam Brannen
  * @since 6.0
+ * @see BasicSpringJupiterSharedConfigTests
  */
 @SpringJUnitConfig({BasicTestConfiguration.class, ManagementConfiguration.class})
 @TestExecutionListeners(listeners = DummyTestExecutionListener.class, mergeMode = MERGE_WITH_DEFAULTS)
 @TestPropertySource(properties = "test.engine = jupiter")
+// We cannot use `classpath*:` in AOT tests until gh-31088 is resolved.
+// @YamlTestProperties("classpath*:org/springframework/test/context/aot/samples/basic/**/test?.yaml")
+@YamlTestProperties({
+	"classpath:org/springframework/test/context/aot/samples/basic/test1.yaml",
+	"classpath:org/springframework/test/context/aot/samples/basic/test2.yaml"
+})
 public class BasicSpringJupiterTests {
 
 	@org.junit.jupiter.api.Test
@@ -53,8 +62,7 @@ public class BasicSpringJupiterTests {
 			@Value("${test.engine}") String testEngine) {
 		assertThat(messageService.generateMessage()).isEqualTo("Hello, AOT!");
 		assertThat(testEngine).isEqualTo("jupiter");
-		assertThat(context.getEnvironment().getProperty("test.engine"))
-			.as("@TestPropertySource").isEqualTo("jupiter");
+		assertEnvProperties(context);
 	}
 
 	@Nested
@@ -68,12 +76,19 @@ public class BasicSpringJupiterTests {
 			assertThat(messageService.generateMessage()).isEqualTo("¡Hola, AOT!");
 			assertThat(foo).isEqualTo("bar");
 			assertThat(testEngine).isEqualTo("jupiter");
-			assertThat(context.getEnvironment().getProperty("test.engine"))
-				.as("@TestPropertySource").isEqualTo("jupiter");
+			assertEnvProperties(context);
 		}
 
 	}
 
+
+	static void assertEnvProperties(ApplicationContext context) {
+		Environment env = context.getEnvironment();
+		assertThat(env.getProperty("test.engine")).as("@TestPropertySource").isEqualTo("jupiter");
+		assertThat(env.getProperty("test1.prop")).as("@TestPropertySource").isEqualTo("yaml");
+		assertThat(env.getProperty("test2.prop")).as("@TestPropertySource").isEqualTo("yaml");
+	}
+
 	public static class DummyTestExecutionListener extends AbstractTestExecutionListener {
 	}
 

spring-test/src/test/java/org/springframework/test/context/env/YamlPropertySourceFactory.java

@@ -32,7 +32,7 @@ import org.springframework.util.StringUtils;
  * @author Sam Brannen
  * @since 6.1
  */
-class YamlPropertySourceFactory implements PropertySourceFactory {
+public class YamlPropertySourceFactory implements PropertySourceFactory {
 
 	@Override
 	public PropertySource<?> createPropertySource(String name, EncodedResource encodedResource) {