ZOOKEEPER-3855: Upgrade jUnit in ZooKeeper-Metrics-providers

Change-Id: I511cb610e269b502e946f52d152db7dcf6d2f2d4

Author: Tamas Penzes <tamaas@cloudera.com>

Reviewers: Enrico Olivelli <eolivelli@apache.org>, Norbert Kalmar <nkalmar@apache.org>

Closes #1421 from tamaashu/ZOOKEEPER-3855

zookeeper-metrics-providers/zookeeper-prometheus-metrics/pom.xml

@@ -75,10 +75,14 @@
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>org.junit.vintage</groupId>
-      <artifactId>junit-vintage-engine</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.platform</groupId>
+      <artifactId>junit-platform-runner</artifactId>
       <scope>test</scope>
     </dependency>
   </dependencies>
-
 </project>

zookeeper-metrics-providers/zookeeper-prometheus-metrics/src/test/java/org/apache/zookeeper/metrics/prometheus/ExportJvmInfoTest.java

@@ -18,10 +18,10 @@
 
 package org.apache.zookeeper.metrics.prometheus;
 
-import static org.junit.Assert.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import io.prometheus.client.CollectorRegistry;
 import java.util.Properties;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  * Tests about Prometheus Metrics Provider. Please note that we are not testing

zookeeper-metrics-providers/zookeeper-prometheus-metrics/src/test/java/org/apache/zookeeper/metrics/prometheus/PrometheusMetricsProviderTest.java

@@ -19,11 +19,11 @@
 package org.apache.zookeeper.metrics.prometheus;
 
 import static org.hamcrest.CoreMatchers.containsString;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertSame;
-import static org.junit.Assert.assertThat;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 import io.prometheus.client.CollectorRegistry;
@@ -39,9 +39,9 @@ import org.apache.zookeeper.metrics.Gauge;
 import org.apache.zookeeper.metrics.MetricsContext;
 import org.apache.zookeeper.metrics.Summary;
 import org.hamcrest.CoreMatchers;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 
 /**
  * Tests about Prometheus Metrics Provider. Please note that we are not testing
@@ -51,7 +51,7 @@ public class PrometheusMetricsProviderTest {
 
     private PrometheusMetricsProvider provider;
 
-    @Before
+    @BeforeEach
     public void setup() throws Exception {
         CollectorRegistry.defaultRegistry.clear();
         provider = new PrometheusMetricsProvider();
@@ -62,7 +62,7 @@ public class PrometheusMetricsProviderTest {
         provider.start();
     }
 
-    @After
+    @AfterEach
     public void tearDown() {
         if (provider != null) {
             provider.stop();