Consider @componentscan in imports context cache key

Fixes gh-31577

Author: wilkinsona

spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/ImportsContextCustomizer.java

@@ -23,6 +23,7 @@
 import java.util.HashSet;
 import java.util.LinkedHashSet;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.BeanFactory;
@@ -36,6 +37,7 @@
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.AnnotatedBeanDefinitionReader;
+import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
@@ -237,7 +239,18 @@ static class ContextCustomizerKey {
 			Set<Class<?>> seen = new HashSet<>();
 			collectClassAnnotations(testClass, annotations, seen);
 			Set<Object> determinedImports = determineImports(annotations, testClass);
-			this.key = Collections.unmodifiableSet((determinedImports != null) ? determinedImports : annotations);
+			if (determinedImports == null) {
+				this.key = Collections.unmodifiableSet(annotations);
+			}
+			else {
+				Set<Object> key = new HashSet<>();
+				key.addAll(determinedImports);
+				Set<Annotation> componentScanning = annotations.stream()
+					.filter(ComponentScan.class::isInstance)
+					.collect(Collectors.toSet());
+				key.addAll(componentScanning);
+				this.key = Collections.unmodifiableSet(key);
+			}
 		}
 
 		private void collectClassAnnotations(Class<?> classType, Set<Annotation> annotations, Set<Class<?>> seen) {

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/ImportsContextCustomizerFactoryTests.java

@@ -23,6 +23,7 @@
 
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.stereotype.Component;
@@ -74,6 +75,20 @@ void contextCustomizerEqualsAndHashCode() {
 		assertThat(customizer3).isEqualTo(customizer4);
 	}
 
+	@Test
+	void contextCustomizerEqualsAndHashCodeConsidersComponentScan() {
+		ContextCustomizer customizer1 = this.factory
+			.createContextCustomizer(TestWithImportAndComponentScanOfSomePackage.class, null);
+		ContextCustomizer customizer2 = this.factory
+			.createContextCustomizer(TestWithImportAndComponentScanOfSomePackage.class, null);
+		ContextCustomizer customizer3 = this.factory
+			.createContextCustomizer(TestWithImportAndComponentScanOfAnotherPackage.class, null);
+		assertThat(customizer1.hashCode()).isEqualTo(customizer2.hashCode());
+		assertThat(customizer1).isEqualTo(customizer2);
+		assertThat(customizer3.hashCode()).isNotEqualTo(customizer2.hashCode()).isNotEqualTo(customizer1.hashCode());
+		assertThat(customizer3).isNotEqualTo(customizer2).isNotEqualTo(customizer1);
+	}
+
 	@Test
 	void getContextCustomizerWhenClassHasBeanMethodsShouldThrowException() {
 		assertThatIllegalStateException()
@@ -105,6 +120,18 @@ static class TestWithImport {
 
 	}
 
+	@Import(ImportedBean.class)
+	@ComponentScan("some.package")
+	static class TestWithImportAndComponentScanOfSomePackage {
+
+	}
+
+	@Import(ImportedBean.class)
+	@ComponentScan("another.package")
+	static class TestWithImportAndComponentScanOfAnotherPackage {
+
+	}
+
 	@MetaImport
 	static class TestWithMetaImport {