Added an injection test for ZkCoordinator.

server/src/test/java/io/druid/server/coordination/ZkCoordinatorTest.java

@@ -17,14 +17,6 @@
 
 package io.druid.server.coordination;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.google.common.collect.ImmutableMap;
-import com.google.common.collect.Iterables;
-import com.google.common.collect.Lists;
-import com.google.common.util.concurrent.MoreExecutors;
-import com.metamx.common.concurrent.ScheduledExecutors;
-import com.metamx.common.lifecycle.Lifecycle;
-import com.metamx.common.logger.Logger;
 import io.druid.client.cache.CacheConfig;
 import io.druid.client.cache.LocalCacheProvider;
 import io.druid.concurrent.Execs;
@@ -39,11 +31,6 @@ import io.druid.server.initialization.ZkPathsConfig;
 import io.druid.server.metrics.NoopServiceEmitter;
 import io.druid.timeline.DataSegment;
 import io.druid.timeline.partition.NoneShardSpec;
-import org.joda.time.Interval;
-import org.junit.After;
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.Test;
 
 import java.io.File;
 import java.io.IOException;
@@ -52,6 +39,27 @@ import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import org.apache.curator.framework.CuratorFramework;
+import org.joda.time.Interval;
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Lists;
+import com.google.common.util.concurrent.MoreExecutors;
+import com.google.inject.Binder;
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import com.google.inject.Module;
+import com.metamx.common.concurrent.ScheduledExecutorFactory;
+import com.metamx.common.concurrent.ScheduledExecutors;
+import com.metamx.common.lifecycle.Lifecycle;
+import com.metamx.common.logger.Logger;
+
 /**
  */
 public class ZkCoordinatorTest extends CuratorTestBase
@@ -283,4 +291,93 @@ public class ZkCoordinatorTest extends CuratorTestBase
       Assert.assertEquals(segments.get(i), segment);
     }
   }
+
+  @Test
+  public void testInjector() throws Exception
+  {
+    Injector injector = Guice.createInjector(
+        new Module()
+        {
+          @Override
+          public void configure(Binder binder)
+          {
+            binder.bind(ObjectMapper.class).toInstance(jsonMapper);
+            binder.bind(SegmentLoaderConfig.class).toInstance(
+                new SegmentLoaderConfig()
+                {
+                  @Override
+                  public File getInfoDir()
+                  {
+                    return infoDir;
+                  }
+
+                  @Override
+                  public int getNumLoadingThreads()
+                  {
+                    return 5;
+                  }
+
+                  @Override
+                  public int getAnnounceIntervalMillis()
+                  {
+                    return 50;
+                  }
+                }
+            );
+            binder.bind(ZkPathsConfig.class).toInstance(
+                new ZkPathsConfig()
+                {
+                  @Override
+                  public String getBase()
+                  {
+                    return "/druid";
+                  }
+                }
+            );
+            binder.bind(DruidServerMetadata.class)
+                  .toInstance(new DruidServerMetadata("dummyServer", "dummyHost", 0, "dummyType", "normal", 0));
+            binder.bind(DataSegmentAnnouncer.class).toInstance(announcer);
+            binder.bind(CuratorFramework.class).toInstance(curator);
+            binder.bind(ServerManager.class).toInstance(serverManager);
+            binder.bind(ScheduledExecutorFactory.class).toInstance(ScheduledExecutors.createFactory(new Lifecycle()));
+          }
+
+        }
+    );
+
+    ZkCoordinator zkCoordinator = injector.getInstance(ZkCoordinator.class);
+
+    List<DataSegment> segments = Lists.newLinkedList();
+    for (int i = 0; i < COUNT; ++i) {
+      segments.add(makeSegment("test" + i, "1", new Interval("P1d/2011-04-01")));
+      segments.add(makeSegment("test" + i, "1", new Interval("P1d/2011-04-02")));
+      segments.add(makeSegment("test" + i, "2", new Interval("P1d/2011-04-02")));
+      segments.add(makeSegment("test_two" + i, "1", new Interval("P1d/2011-04-01")));
+      segments.add(makeSegment("test_two" + i, "1", new Interval("P1d/2011-04-02")));
+    }
+    Collections.sort(segments);
+
+    for (DataSegment segment : segments) {
+      writeSegmentToCache(segment);
+    }
+
+    checkCache(segments);
+    Assert.assertTrue(serverManager.getDataSourceCounts().isEmpty());
+
+    zkCoordinator.start();
+    Assert.assertTrue(!serverManager.getDataSourceCounts().isEmpty());
+    for (int i = 0; i < COUNT; ++i) {
+      Assert.assertEquals(3L, serverManager.getDataSourceCounts().get("test" + i).longValue());
+      Assert.assertEquals(2L, serverManager.getDataSourceCounts().get("test_two" + i).longValue());
+    }
+    Assert.assertEquals(5 * COUNT, announceCount.get());
+    zkCoordinator.stop();
+
+    for (DataSegment segment : segments) {
+      deleteSegmentFromCache(segment);
+    }
+
+    Assert.assertEquals(0, infoDir.listFiles().length);
+    Assert.assertTrue(infoDir.delete());
+  }
 }