Move back to JUnit 4 until SUREFIRE-1614 has been resolved

See gh-14736
See gh-14737
See gh-14738

spring-boot-samples/spring-boot-sample-web-ui/src/test/java/sample/web/ui/MessageControllerWebTests.java

@@ -20,11 +20,13 @@ import java.util.regex.Pattern;
 
 import org.hamcrest.Description;
 import org.hamcrest.TypeSafeMatcher;
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.setup.MockMvcBuilders;
 import org.springframework.web.context.WebApplicationContext;
@@ -42,7 +44,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
  * @author Biju Kunjummen
  * @author Doo-Hwan, Kwak
  */
-
+@RunWith(SpringRunner.class)
 @SpringBootTest
 public class MessageControllerWebTests {
 
@@ -51,7 +53,7 @@ public class MessageControllerWebTests {
 
 	private MockMvc mockMvc;
 
-	@BeforeEach
+	@Before
 	public void setup() {
 		this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
 	}

spring-boot-samples/spring-boot-sample-web-ui/src/test/java/sample/web/ui/SampleWebUiApplicationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -18,7 +18,8 @@ package sample.web.ui;
 
 import java.net.URI;
 
-import org.junit.jupiter.api.Test;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
@@ -27,6 +28,7 @@ import org.springframework.boot.test.web.client.TestRestTemplate;
 import org.springframework.boot.web.server.LocalServerPort;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
 
@@ -37,7 +39,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Dave Syer
  */
-
+@RunWith(SpringRunner.class)
 @SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
 public class SampleWebUiApplicationTests {