Move integration tests to dedicated module

This commit moves the dependency management and test source files
related to integration tests to a dedicated module.
This allows us to focus the root project on building the Spring
Framework.

See gh-23282

integration-tests/src/test/java/com/foo/ComponentBeanDefinitionParserTests.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2002-2019 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 com.foo;
+
+
+import java.util.List;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
+import org.springframework.core.io.ClassPathResource;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+
+/**
+ * @author Costin Leau
+ */
+public class ComponentBeanDefinitionParserTests {
+
+	private static DefaultListableBeanFactory bf;
+
+	@BeforeAll
+	public static void setUpBeforeClass() throws Exception {
+		bf = new DefaultListableBeanFactory();
+		new XmlBeanDefinitionReader(bf).loadBeanDefinitions(new ClassPathResource("com/foo/component-config.xml"));
+	}
+
+	@AfterAll
+	public static void tearDownAfterClass() throws Exception {
+		bf.destroySingletons();
+	}
+
+	private Component getBionicFamily() {
+		return bf.getBean("bionic-family", Component.class);
+	}
+
+	@Test
+	public void testBionicBasic() throws Exception {
+		Component cp = getBionicFamily();
+		assertThat("Bionic-1").isEqualTo(cp.getName());
+	}
+
+	@Test
+	public void testBionicFirstLevelChildren() throws Exception {
+		Component cp = getBionicFamily();
+		List<Component> components = cp.getComponents();
+		assertThat(2).isEqualTo(components.size());
+		assertThat("Mother-1").isEqualTo(components.get(0).getName());
+		assertThat("Rock-1").isEqualTo(components.get(1).getName());
+	}
+
+	@Test
+	public void testBionicSecondLevelChildren() throws Exception {
+		Component cp = getBionicFamily();
+		List<Component> components = cp.getComponents().get(0).getComponents();
+		assertThat(2).isEqualTo(components.size());
+		assertThat("Karate-1").isEqualTo(components.get(0).getName());
+		assertThat("Sport-1").isEqualTo(components.get(1).getName());
+	}
+}