Add Smoke Test

pom.xml

@@ -108,6 +108,7 @@
       <url>https://repo.jenkins-ci.org/public/</url>
     </repository>
   </repositories>
+
   <pluginRepositories>
     <pluginRepository>
       <id>repo.jenkins-ci.org</id>

src/test/java/io/jenkins/plugins/httpclient5/SmokeTest.java

@@ -0,0 +1,22 @@
+package io.jenkins.plugins.httpclient5;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.net.URI;
+import org.apache.hc.client5.http.fluent.Request;
+import org.apache.hc.client5.http.fluent.Response;
+import org.apache.hc.core5.http.HttpStatus;
+import org.junit.jupiter.api.Test;
+import org.jvnet.hudson.test.JenkinsRule;
+import org.jvnet.hudson.test.junit.jupiter.WithJenkins;
+
+@WithJenkins
+class SmokeTest {
+
+    @Test
+    void smokeTest(JenkinsRule r) throws Exception {
+        URI uri = r.getURL().toURI();
+        Response response = Request.get(uri).execute();
+        assertEquals(HttpStatus.SC_OK, response.returnResponse().getCode());
+    }
+}