Ignore blocked remote tests on CI server

src/test/java/net/sf/jabref/logic/fetcher/GoogleScholarTest.java

@@ -1,9 +1,8 @@
 package net.sf.jabref.logic.fetcher;
 
 import net.sf.jabref.model.entry.BibtexEntry;
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.Test;
+import net.sf.jabref.support.DevEnvironment;
+import org.junit.*;
 
 import java.io.IOException;
 import java.net.URL;
@@ -31,6 +30,9 @@ public void requiresEntryTitle() throws IOException {
 
     @Test
     public void linkFound() throws IOException {
+        // CI server is blocked by Google
+        Assume.assumeFalse(DevEnvironment.isCIServer());
+
         entry.setField("title", "Towards Application Portability in Platform as a Service");
 
         Assert.assertEquals(
@@ -41,6 +43,9 @@ public void linkFound() throws IOException {
 
     @Test
     public void noLinkFound() throws IOException {
+        // CI server is blocked by Google
+        Assume.assumeFalse(DevEnvironment.isCIServer());
+
         entry.setField("title", "Pro WF: Windows Workflow in NET 3.5");
 
         Assert.assertEquals(Optional.empty(), finder.findFullText(entry));

src/test/java/net/sf/jabref/support/DevEnvironment.java

@@ -0,0 +1,13 @@
+package net.sf.jabref.support;
+
+/**
+ * Checks whether we are on a local development environment and not on a CI server.
+ * This is needed as some remote fetcher tests are blocked by Google when executed by CI servers.
+ */
+public class DevEnvironment {
+    public static boolean isCIServer() {
+        // See http://docs.travis-ci.com/user/environment-variables/#Default-Environment-Variables
+        // See https://circleci.com/docs/environment-variables
+        return Boolean.valueOf(System.getenv("CI"));
+    }
+}