Fix issue #1173

Author: zsxwing

language-adaptors/rxjava-scala/src/main/scala/rx/lang/scala/Subscriber.scala

@@ -34,6 +34,8 @@ object Subscriber extends ObserverFactoryMethods[Subscriber] {
 
   private[scala] def apply[T](subscriber: rx.Subscriber[T]): Subscriber[T] = new Subscriber[T] {
     override val asJavaSubscriber = subscriber
+    override val asJavaObserver: rx.Observer[_ >: T] = asJavaSubscriber
+    override val asJavaSubscription: rx.Subscription = asJavaSubscriber
 
     override def onNext(value: T): Unit = asJavaSubscriber.onNext(value)
     override def onError(error: Throwable): Unit = asJavaSubscriber.onError(error)

language-adaptors/rxjava-scala/src/test/scala/rx/lang/scala/SubscriberTests.scala

@@ -0,0 +1,32 @@
+/**
+ * Copyright 2013 Netflix, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package rx.lang.scala
+
+import org.junit.Test
+import org.junit.Assert.assertNotNull
+import org.scalatest.junit.JUnitSuite
+
+class SubscriberTests extends JUnitSuite {
+
+  @Test def testIssue1173() {
+    // https://github.com/Netflix/RxJava/issues/1173
+    val subscriber = Subscriber((n: Int) => println(n))
+    assertNotNull(subscriber.asJavaObserver)
+    assertNotNull(subscriber.asJavaSubscription)
+    assertNotNull(subscriber.asJavaSubscriber)
+  }
+
+}