--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spring-di-playground/src/test/java/de/comline/spring/ClasspathScanningTest.java	Tue Aug 11 16:05:44 2020 +0200
@@ -0,0 +1,74 @@
+package de.comline.spring;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.fail;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.NoUniqueBeanDefinitionException;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.ComponentScan.Filter;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.FilterType;
+
+import de.comline.spring.model.MovieCatalog;
+import de.comline.spring.model.scanning.ActionMovieCatalogComponent;
+
+public class ClasspathScanningTest {
+	@Test
+	@DisplayName("Scanning explicit packages")
+	public void classpathScanning() {
+		try (AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext("de.comline.spring.model.scanning")) {
+			assertThrows(NoUniqueBeanDefinitionException.class, () -> {
+				context.getBean(MovieCatalog.class);
+				fail("Classpath scanning must have detected both implementations of the MovieCatalog interface");
+			});
+		}
+	}
+
+	@Test
+	@DisplayName("Scanning by configuration")
+	public void explicitConfiguration() {
+		try (AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ScanningConfiguration.class)) {
+			assertThrows(NoUniqueBeanDefinitionException.class, () -> {
+				context.getBean(MovieCatalog.class);
+				fail("Classpath scanning must have detected both implementations of the MovieCatalog interface");
+			});
+		}
+	}
+
+	@Test
+	@DisplayName("Scanning by configuration with filter")
+	public void configurationWithFilter() {
+		try (AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(FilteredScanningConfiguration.class)) {
+			MovieCatalog catalog = context.getBean(MovieCatalog.class);
+			assertThat(catalog.getCategory(), is("Comedy"));
+		}
+	}
+
+	/**
+	 * Note: class may not be final.<br/>
+	 * Note: class must have a default constructor which is package protected at
+	 * least
+	 */
+	@Configuration
+	@ComponentScan(basePackages = "de.comline.spring.model.scanning")
+	private static class ScanningConfiguration {
+		@SuppressWarnings("unused")
+		ScanningConfiguration() {
+			super();
+		}
+	}
+
+	@Configuration
+	@ComponentScan(basePackages = "de.comline.spring.model.scanning", excludeFilters = @Filter(type = FilterType.ASSIGNABLE_TYPE, classes = ActionMovieCatalogComponent.class))
+	private static class FilteredScanningConfiguration {
+		@SuppressWarnings("unused")
+		FilteredScanningConfiguration() {
+			super();
+		}
+	}
+}