Added a utilities class for connectivity assumptions. Based the Gitla…

…bControllerTest on the assumption that the Hobbit gitlab instance is available.

platform-controller/src/test/java/org/hobbit/controller/ConnectivityAssumptionUtils.java

@@ -0,0 +1,34 @@
+package org.hobbit.controller;
+
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import org.junit.Assume;
+
+/**
+ * A simple class that offers utility methods to assume the connectivity within
+ * JUnit tests.
+ * 
+ * @author Michael Röder (michael.roeder@uni-paderborn.de)
+ *
+ */
+public class ConnectivityAssumptionUtils {
+
+    public static void assumeConnectivity(String httpUrl) {
+        try {
+            URL pingUrl = new URL(httpUrl);
+            HttpURLConnection connection = (HttpURLConnection) pingUrl.openConnection();
+
+            Assume.assumeTrue(
+                    "Got a wrong status (" + connection.getResponseCode()
+                            + ") code while checking the connectivity to \"" + httpUrl
+                            + "\". I will assume that I cannot connect to this endpoint.",
+                    connection.getResponseCode() < 400);
+        } catch (Exception e) {
+            Assume.assumeNoException(
+                    "Exception while checking connectivity to \"" + httpUrl
+                            + "\". I will assume that I cannot connect to this endpoint. Exception: " + e.getMessage(),
+                    e);
+        }
+    }
+}

platform-controller/src/test/java/org/hobbit/controller/gitlab/GitlabControllerImplTest.java

@@ -28,6 +28,8 @@
 import org.apache.jena.rdf.model.impl.ResourceImpl;
 import org.gitlab.api.GitlabAPI;
 import org.gitlab.api.models.*;
+import org.hobbit.controller.ConnectivityAssumptionUtils;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
@@ -37,6 +39,7 @@
 
 /**
  * Created by Timofey Ermilov on 17/10/2016.
+ * Updated by Michael Röder to run only if the test instance is available-
  */
 public class GitlabControllerImplTest {
     private static final String GITLAB_URL = "https://git.project-hobbit.eu/";
@@ -47,6 +50,7 @@ public class GitlabControllerImplTest {
 
     @Before
     public void init() throws InterruptedException {
+        ConnectivityAssumptionUtils.assumeConnectivity(GITLAB_URL);
         gitlabProject = new GitlabProject();
         gitlabProject.setId(526);
         gitlabProject.setName("testing-benchmark");