Add Integration Tests testing and asserting the behavior of the Spring TestContext framework with regard to managing ApplicationContexts created, managed and used by test cases of test classes.

spring-data-geode-test/src/test/java/org/springframework/data/gemfire/SpringTestContextIntegrationTests.java

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+/*
+ *  Copyright 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 org.springframework.data.gemfire;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.TestContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+/**
+ * Integration Tests for Spring's {@link TestContext}.
+ *
+ * @author John Blum
+ * @see org.springframework.context.ApplicationContext
+ * @see org.springframework.test.annotation.DirtiesContext
+ * @see org.springframework.test.context.ContextConfiguration
+ * @see org.springframework.test.context.TestContext
+ * @see org.springframework.test.context.junit4.SpringRunner
+ * @since 0.0.23
+ */
+@RunWith(SpringRunner.class)
+@DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_CLASS)
+@ContextConfiguration
+@SuppressWarnings("unused")
+public class SpringTestContextIntegrationTests {
+
+	private static final Set<Integer> applicationContextsIdentityHashCodes =
+		Collections.synchronizedSet(new HashSet<>());
+
+	@Autowired
+	private ApplicationContext applicationContext;
+
+	@AfterClass
+	public static void runAfterTestClass() {
+		assertThat(applicationContextsIdentityHashCodes).hasSize(1);
+	}
+
+	@Before
+	public void setup() {
+		applicationContextsIdentityHashCodes.add(System.identityHashCode(this.applicationContext));
+	}
+
+	@Test
+	//@DirtiesContext
+	public void testCaseOne() {
+		assertThat(this.applicationContext).isNotNull();
+	}
+
+	@Test
+	public void testCaseTwo() {
+		assertThat(this.applicationContext).isNotNull();
+	}
+
+	@Test
+	public void testCaseThree() {
+		assertThat(this.applicationContext).isNotNull();
+	}
+
+	@Configuration
+	static class TestConfiguration { }
+
+}