Verify @⁠MockitoBean can be used with generics and parameterized types

See gh-33742

Author: sbrannen

spring-test/src/test/java/org/springframework/test/context/bean/override/mockito/integration/AbstractMockitoBeanAndGenericsIntegrationTests.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2002-2024 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.test.context.bean.override.mockito.integration;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.bean.override.mockito.MockitoBean;
+import org.springframework.test.context.bean.override.mockito.integration.AbstractMockitoBeanAndGenericsIntegrationTests.Something;
+import org.springframework.test.context.bean.override.mockito.integration.AbstractMockitoBeanAndGenericsIntegrationTests.Thing;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+/**
+ * Abstract base class for tests for {@link MockitoBean @MockitoBean} with generics.
+ *
+ * @param <T> type of thing
+ * @param <S> type of something
+ * @author Madhura Bhave
+ * @author Sam Brannen
+ * @since 6.2
+ * @see MockitoBeanAndGenericsIntegrationTests
+ */
+@SpringJUnitConfig
+abstract class AbstractMockitoBeanAndGenericsIntegrationTests<T extends Thing<S>, S extends Something> {
+
+	@Autowired
+	T thing;
+
+	@MockitoBean
+	S something;
+
+
+	static class Something {
+		String speak() {
+			return "Hi";
+		}
+	}
+
+	static class SomethingImpl extends Something {
+	}
+
+	abstract static class Thing<S extends Something> {
+
+		@Autowired
+		private S something;
+
+		S getSomething() {
+			return this.something;
+		}
+	}
+
+	static class ThingImpl extends Thing<SomethingImpl> {
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	static class Config {
+
+		@Bean
+		ThingImpl thing() {
+			return new ThingImpl();
+		}
+	}
+
+}

spring-test/src/test/java/org/springframework/test/context/bean/override/mockito/integration/MockitoBeanAndGenericsIntegrationTests.java

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+/*
+ * Copyright 2012-2024 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.test.context.bean.override.mockito.integration;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.test.context.bean.override.mockito.integration.AbstractMockitoBeanAndGenericsIntegrationTests.SomethingImpl;
+import org.springframework.test.context.bean.override.mockito.integration.AbstractMockitoBeanAndGenericsIntegrationTests.ThingImpl;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.when;
+
+/**
+ * Concrete implementation of {@link AbstractMockitoBeanAndGenericsIntegrationTests}.
+ *
+ * @author Madhura Bhave
+ * @author Sam Brannen
+ * @since 6.2
+ */
+class MockitoBeanAndGenericsIntegrationTests extends AbstractMockitoBeanAndGenericsIntegrationTests<ThingImpl, SomethingImpl> {
+
+	@Test
+	void mockitoBeanShouldResolveConcreteType() {
+		assertThat(something).isExactlyInstanceOf(SomethingImpl.class);
+
+		when(something.speak()).thenReturn("Hola");
+		assertThat(thing.getSomething().speak()).isEqualTo("Hola");
+	}
+
+}