explicitly enable http when running plugin tests

add an option to force a setting when building a node, overriding if its explicitly set as system property

src/main/java/org/elasticsearch/node/internal/InternalSettingsPreparer.java

@@ -27,6 +27,8 @@ import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.env.Environment;
 import org.elasticsearch.env.FailedToResolveConfigException;
 
+import java.util.Map;
+
 import static org.elasticsearch.common.Strings.cleanPath;
 import static org.elasticsearch.common.settings.ImmutableSettings.settingsBuilder;
 
@@ -97,6 +99,16 @@ public class InternalSettingsPreparer {
         }
         settingsBuilder.replacePropertyPlaceholders();
 
+        // allow to force set properties based on configuration of the settings provided
+        for (Map.Entry<String, String> entry : pSettings.getAsMap().entrySet()) {
+            String setting = entry.getKey();
+            if (setting.startsWith("force.")) {
+                settingsBuilder.remove(setting);
+                settingsBuilder.put(setting.substring(".force".length()), entry.getValue());
+            }
+        }
+        settingsBuilder.replacePropertyPlaceholders();
+
         // generate the name
         if (settingsBuilder.get("name") == null) {
             String name = System.getProperty("name");

src/test/java/org/elasticsearch/plugin/PluginManagerTests.java

@@ -48,7 +48,9 @@ import static org.hamcrest.CoreMatchers.*;
 @ClusterScope(scope = Scope.TEST, numNodes = 0)
 public class PluginManagerTests extends AbstractIntegrationTest {
     private static final Settings SETTINGS = ImmutableSettings.settingsBuilder()
-        .put("discovery.zen.ping.multicast.enabled", false).build();
+            .put("discovery.zen.ping.multicast.enabled", false)
+            .put("force.http.enabled", true)
+            .build();
     private static final String PLUGIN_DIR = "plugins";
 
     @After
@@ -211,7 +213,8 @@ public class PluginManagerTests extends AbstractIntegrationTest {
      * We are ignoring by default these tests as they require to have an internet access
      * To activate the test, use -Dtests.network=true
      */
-    @Test @Network
+    @Test
+    @Network
     public void testInstallPluginWithInternet() throws IOException {
         // We test regular form: username/reponame/version
         // It should find it in download.elasticsearch.org service

src/test/java/org/elasticsearch/plugin/ResponseHeaderPluginTests.java

@@ -44,7 +44,11 @@ public class ResponseHeaderPluginTests extends AbstractIntegrationTest {
 
     @Override
     protected Settings nodeSettings(int nodeOrdinal) {
-        return ImmutableSettings.settingsBuilder().put("plugin.types", TestResponseHeaderPlugin.class.getName()).put(super.nodeSettings(nodeOrdinal)).build();
+        return ImmutableSettings.settingsBuilder()
+                .put("plugin.types", TestResponseHeaderPlugin.class.getName())
+                .put("force.http.enabled", true)
+                .put(super.nodeSettings(nodeOrdinal))
+                .build();
     }
 
     @Test

src/test/java/org/elasticsearch/plugin/SitePluginTests.java

@@ -50,6 +50,7 @@ public class SitePluginTests extends AbstractIntegrationTest {
             return settingsBuilder()
                     .put(super.nodeSettings(nodeOrdinal))
                     .put("path.plugins", pluginDir.getAbsolutePath())
+                    .put("force.http.enabled", true)
                     .build();
         } catch (URISyntaxException ex) {
             throw new RuntimeException(ex);