Update Sandbox Tests to JUnit 5

Issue gh-1058

Author: jzheaux

sandbox/build.gradle

@@ -9,8 +9,9 @@ dependencies {
     provided "com.sun:ldapbp:1.0"
 
     testImplementation platform('org.junit:junit-bom')
-    testImplementation "org.junit.vintage:junit-vintage-engine"
-    testImplementation "junit:junit"
+    testImplementation "org.junit.jupiter:junit-jupiter-api"
+    testImplementation "org.junit.jupiter:junit-jupiter-engine"
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
     testImplementation "org.mockito:mockito-core"
     testImplementation "gsbase:gsbase"
     testImplementation "org.assertj:assertj-core"
@@ -26,4 +27,5 @@ compileTestJava {
 
 test {
     jvmArgs '--add-exports', 'java.naming/com.sun.jndi.ldap=ALL-UNNAMED'
+    useJUnitPlatform()
 }

sandbox/src/test/java/org/springframework/ldap/control/VirtualListViewControlDirContextProcessorTests.java

@@ -27,8 +27,8 @@
 import com.sun.jndi.ldap.ctl.VirtualListViewControl;
 import com.sun.jndi.ldap.ctl.VirtualListViewResponseControl;
 import junit.framework.AssertionFailedError;
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 
 import org.springframework.ldap.OperationNotSupportedException;
 
@@ -50,7 +50,7 @@ public class VirtualListViewControlDirContextProcessorTests {
 
 	private LdapContext ldapContextMock;
 
-	@Before
+	@BeforeEach
 	public void setUp() throws Exception {
 		// Create ldapContext mock
 		this.ldapContextMock = mock(LdapContext.class);