Add unit tests to cover the methods of AnnotatedMethodDiscovery

mcp/mcp-annotations-spring/src/test/java/org/springframework/ai/mcp/annotation/spring/scan/AbstractAnnotatedMethodBeanFactoryInitializationAotProcessorTests.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright 2025-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.ai.mcp.annotation.spring.scan;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.aot.generate.GenerationContext;
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.TypeHint;
+import org.springframework.aot.hint.TypeReference;
+import org.springframework.beans.factory.aot.BeanFactoryInitializationAotContribution;
+import org.springframework.beans.factory.aot.BeanFactoryInitializationCode;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+import org.springframework.beans.factory.support.RootBeanDefinition;
+
+import java.lang.annotation.*;
+import java.util.List;
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * Unit Tests for {@link AbstractAnnotatedMethodBeanFactoryInitializationAotProcessor}.
+ *
+ * @author lance
+ */
+class AbstractAnnotatedMethodBeanFactoryInitializationAotProcessorTests {
+
+	@Test
+	void testProcessAheadOfTime() {
+		// register bean(AnnotatedBean,PlainBean)
+		DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
+		beanFactory.registerBeanDefinition(AnnotatedBean.class.getName(), new RootBeanDefinition(AnnotatedBean.class));
+		beanFactory.registerBeanDefinition(PlainBean.class.getName(), new RootBeanDefinition(PlainBean.class));
+
+		PlainBean plainBean = beanFactory.getBean(PlainBean.class);
+		assertThat(plainBean).isNotNull();
+
+		// create AbstractAnnotatedMethodBeanFactoryInitializationAotProcessor
+		Set<Class<? extends Annotation>> annotations = Set.of(MyAnnotation.class);
+		AbstractAnnotatedMethodBeanFactoryInitializationAotProcessor processor = new AbstractAnnotatedMethodBeanFactoryInitializationAotProcessor(
+				annotations);
+
+		// execute processAheadOfTime
+		BeanFactoryInitializationAotContribution aotContribution = processor.processAheadOfTime(beanFactory);
+		assertThat(aotContribution).isNotNull();
+
+		// execute Contribution
+		GenerationContext generationContext = mock(GenerationContext.class);
+		when(generationContext.getRuntimeHints()).thenReturn(new RuntimeHints());
+
+		BeanFactoryInitializationCode initializationCode = mock(BeanFactoryInitializationCode.class);
+		aotContribution.applyTo(generationContext, initializationCode);
+
+		// valid hints bean exist?
+		List<TypeHint> typeHints = generationContext.getRuntimeHints().reflection().typeHints().toList();
+		assertThat(typeHints).isNotNull().hasSize(1);
+
+		TypeReference type = typeHints.get(0).getType();
+		assertThat(type).matches(t -> t.getName().equals(AnnotatedBean.class.getName()))
+			.doesNotMatch(t -> t.getName().equals(PlainBean.class.getName()));
+	}
+
+	@Target(ElementType.METHOD)
+	@Retention(RetentionPolicy.RUNTIME)
+	@interface MyAnnotation {
+
+	}
+
+	/**
+	 * test bean
+	 */
+	static class AnnotatedBean {
+
+		@MyAnnotation
+		public void doSomething() {
+		}
+
+	}
+
+	static class PlainBean {
+
+		public void nothing() {
+		}
+
+	}
+
+}

mcp/mcp-annotations-spring/src/test/java/org/springframework/ai/mcp/annotation/spring/scan/AnnotatedMethodDiscoveryTests.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2025-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.ai.mcp.annotation.spring.scan;
+
+import org.junit.jupiter.api.Test;
+
+import java.lang.annotation.*;
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Unit Tests for {@link AnnotatedMethodDiscovery}.
+ *
+ * @author lance
+ */
+class AnnotatedMethodDiscoveryTests {
+
+	@Test
+	void testScanAnnotationMethod() {
+		Set<Class<? extends Annotation>> annotations = Set.of(MyAnnotation.class, AnotherAnnotation.class);
+		AnnotatedMethodDiscovery discovery = new AnnotatedMethodDiscovery(annotations);
+		Set<Class<? extends Annotation>> scanned = discovery.scan(PlainClass.class);
+
+		assertThat(scanned).containsExactlyInAnyOrder(MyAnnotation.class, AnotherAnnotation.class);
+	}
+
+	@Test
+	void testReturnEmpty() {
+		Set<Class<? extends Annotation>> annotations = Set.of(MyAnnotation.class);
+		AnnotatedMethodDiscovery discovery = new AnnotatedMethodDiscovery(annotations);
+		Set<Class<? extends Annotation>> scanned = discovery.scan(Set.class);
+
+		assertThat(scanned).isEmpty();
+	}
+
+	@Target(ElementType.METHOD)
+	@Retention(RetentionPolicy.RUNTIME)
+	@interface MyAnnotation {
+
+	}
+
+	@Target(ElementType.METHOD)
+	@Retention(RetentionPolicy.RUNTIME)
+	@interface AnotherAnnotation {
+
+	}
+
+	static class PlainClass {
+
+		@MyAnnotation
+		public void methodA() {
+		}
+
+		@AnotherAnnotation
+		public void methodB() {
+		}
+
+		public void methodC() {
+		}
+
+	}
+
+}