Migrate to ApplicationContextRunner

Migrate a new tests to use the `ApplicationContextRunner`.

See gh-17491

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnMissingBeanWithFilteredClasspathTests.java

@@ -16,14 +16,13 @@
 
 package org.springframework.boot.autoconfigure.condition;
 
-import org.junit.After;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.boot.testsupport.runner.classpath.ClassPathExclusions;
 import org.springframework.boot.testsupport.runner.classpath.ModifiedClassPathRunner;
 import org.springframework.cache.caffeine.CaffeineCacheManager;
-import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
@@ -40,18 +39,12 @@ import static org.assertj.core.api.Assertions.assertThat;
 @ClassPathExclusions("spring-context-support-*.jar")
 public class ConditionalOnMissingBeanWithFilteredClasspathTests {
 
-	private final AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
+	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
-
+			.withUserConfiguration(OnBeanTypeConfiguration.class);
-	@After
-	public void closeContext() {
-		this.context.close();
-	}
 
 	@Test
 	public void testNameOnMissingBeanTypeWithMissingImport() {
-		this.context.register(OnBeanTypeConfiguration.class);
+		this.contextRunner.run((context) -> assertThat(context).hasBean("foo"));
-		this.context.refresh();
-		assertThat(this.context.containsBean("foo")).isTrue();
 	}
 
 	@Configuration(proxyBeanMethods = false)

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/http/HttpMessageConvertersAutoConfigurationWithoutJacksonTests.java

@@ -16,13 +16,13 @@
 
 package org.springframework.boot.autoconfigure.http;
 
-import org.junit.After;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.boot.testsupport.runner.classpath.ClassPathExclusions;
 import org.springframework.boot.testsupport.runner.classpath.ModifiedClassPathRunner;
-import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -36,20 +36,12 @@ import static org.assertj.core.api.Assertions.assertThat;
 @ClassPathExclusions("jackson-*.jar")
 public class HttpMessageConvertersAutoConfigurationWithoutJacksonTests {
 
-	private AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
+	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
-
+			.withConfiguration(AutoConfigurations.of(HttpMessageConvertersAutoConfiguration.class));
-	@After
-	public void close() {
-		if (this.context != null) {
-			this.context.close();
-		}
-	}
 
 	@Test
 	public void autoConfigurationWorksWithSpringHateoasButWithoutJackson() {
-		this.context.register(HttpMessageConvertersAutoConfiguration.class);
+		this.contextRunner.run((context) -> assertThat(context).hasSingleBean(HttpMessageConverters.class));
-		this.context.refresh();
-		assertThat(this.context.getBeansOfType(HttpMessageConverters.class)).hasSize(1);
 	}
 
 }

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/validation/ValidationAutoConfigurationWithHibernateValidatorMissingElImplTests.java

@@ -18,13 +18,13 @@ package org.springframework.boot.autoconfigure.validation;
 
 import javax.validation.Validator;
 
-import org.junit.After;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.boot.testsupport.runner.classpath.ClassPathExclusions;
 import org.springframework.boot.testsupport.runner.classpath.ModifiedClassPathRunner;
-import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.validation.beanvalidation.MethodValidationPostProcessor;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -39,20 +39,15 @@ import static org.assertj.core.api.Assertions.assertThat;
 @ClassPathExclusions({ "tomcat-embed-el-*.jar", "el-api-*.jar" })
 public class ValidationAutoConfigurationWithHibernateValidatorMissingElImplTests {
 
-	private AnnotationConfigApplicationContext context;
+	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
-
+			.withConfiguration(AutoConfigurations.of(ValidationAutoConfiguration.class));
-	@After
-	public void close() {
-		if (this.context != null) {
-			this.context.close();
-		}
-	}
 
 	@Test
 	public void missingElDependencyIsTolerated() {
-		this.context = new AnnotationConfigApplicationContext(ValidationAutoConfiguration.class);
+		this.contextRunner.run((context) -> {
-		assertThat(this.context.getBeansOfType(Validator.class)).hasSize(1);
+			assertThat(context).hasSingleBean(Validator.class);
-		assertThat(this.context.getBeansOfType(MethodValidationPostProcessor.class)).hasSize(1);
+			assertThat(context).hasSingleBean(MethodValidationPostProcessor.class);
+		});
 	}
 
 }

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/validation/ValidationAutoConfigurationWithoutValidatorTests.java

@@ -18,13 +18,13 @@ package org.springframework.boot.autoconfigure.validation;
 
 import javax.validation.Validator;
 
-import org.junit.After;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.boot.testsupport.runner.classpath.ClassPathExclusions;
 import org.springframework.boot.testsupport.runner.classpath.ModifiedClassPathRunner;
-import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.validation.beanvalidation.MethodValidationPostProcessor;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -38,20 +38,15 @@ import static org.assertj.core.api.Assertions.assertThat;
 @ClassPathExclusions("hibernate-validator-*.jar")
 public class ValidationAutoConfigurationWithoutValidatorTests {
 
-	private AnnotationConfigApplicationContext context;
+	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
-
+			.withConfiguration(AutoConfigurations.of(ValidationAutoConfiguration.class));
-	@After
-	public void close() {
-		if (this.context != null) {
-			this.context.close();
-		}
-	}
 
 	@Test
 	public void validationIsDisabled() {
-		this.context = new AnnotationConfigApplicationContext(ValidationAutoConfiguration.class);
+		this.contextRunner.run((context) -> {
-		assertThat(this.context.getBeansOfType(Validator.class)).isEmpty();
+			assertThat(context).doesNotHaveBean(Validator.class);
-		assertThat(this.context.getBeansOfType(MethodValidationPostProcessor.class)).isEmpty();
+			assertThat(context).doesNotHaveBean(MethodValidationPostProcessor.class);
+		});
 	}
 
 }