Merge pull request #1210 from zsxwing/rxscala-more

Add more operators to RxScala

Author: benjchristensen

language-adaptors/rxjava-scala/src/examples/scala/rx/lang/scala/examples/RxScalaDemo.scala

@@ -144,6 +144,12 @@ class RxScalaDemo extends JUnitSuite {
     o.buffer(5).subscribe((l: Seq[Int]) => println(l.mkString("[", ", ", "]")))
   }
 
+  @Test def bufferExample() {
+    val o = Observable.from(1 to 18).zip(Observable.interval(100 millis)).map(_._1)
+    val boundary = Observable.interval(500 millis)
+    o.buffer(boundary).toBlockingObservable.foreach((l: Seq[Int]) => println(l.mkString("[", ", ", "]")))
+  }
+
   @Test def windowExample() {
     (for ((o, i) <- Observable.from(1 to 18).window(5).zipWithIndex; n <- o)
       yield s"Observable#$i emits $n"
@@ -644,6 +650,21 @@ class RxScalaDemo extends JUnitSuite {
     println(result)
   }
 
+  @Test def delayExample3(): Unit = {
+    val o = List(100, 500, 200).toObservable.delay(
+      (i: Int) => Observable.items(i).delay(i millis)
+    )
+    o.toBlockingObservable.foreach(println(_))
+  }
+
+  @Test def delayExample4(): Unit = {
+    val o = List(100, 500, 200).toObservable.delay(
+      () => Observable.interval(500 millis).take(1),
+      (i: Int) => Observable.items(i).delay(i millis)
+    )
+    o.toBlockingObservable.foreach(println(_))
+  }
+
   @Test def delaySubscriptionExample(): Unit = {
     val o = List(100L, 200L, 300L).toObservable.delaySubscription(2 seconds)
     val result = o.toBlockingObservable.toList
@@ -792,6 +813,53 @@ class RxScalaDemo extends JUnitSuite {
     assertEquals(List(1, 2, 3, 4), o.toBlockingObservable.toList)
   }
 
+  @Test def sequenceEqualExampe(): Unit = {
+    val o1 = List(1, 2, 3).toObservable
+    val o2 = List(1, 2, 3).toObservable
+    val o3 = List(1, 2).toObservable
+    val o4 = List(1.0, 2.0, 3.0).toObservable
+    assertTrue(o1.sequenceEqual(o2).toBlockingObservable.single)
+    assertFalse(o1.sequenceEqual(o3).toBlockingObservable.single)
+    assertTrue(o1.sequenceEqual(o4).toBlockingObservable.single)
+  }
+
+  @Test def takeExample(): Unit = {
+    val o = (1 to 20).toObservable
+      .zip(Observable.interval(300 millis))
+      .map(_._1)
+      .take(2 seconds)
+    println(o.toBlockingObservable.toList)
+  }
+
+  @Test def takeRightExample(): Unit = {
+    val o = (1 to 6).toObservable.takeRight(3)
+    assertEquals(List(4, 5, 6), o.toBlockingObservable.toList)
+  }
+
+  @Test def takeRightExample2(): Unit = {
+    val o = (1 to 10).toObservable
+      .zip(Observable.interval(100 millis))
+      .map(_._1)
+      .takeRight(300 millis)
+    println(o.toBlockingObservable.toList)
+  }
+
+  @Test def takeRightExample3(): Unit = {
+    val o = (1 to 10).toObservable
+      .zip(Observable.interval(100 millis))
+      .map(_._1)
+      .takeRight(2, 300 millis)
+    println(o.toBlockingObservable.toList)
+  }
+
+  @Test def timeIntervalExample(): Unit = {
+    val o = (1 to 10).toObservable
+      .zip(Observable.interval(100 millis))
+      .map(_._1)
+      .timeInterval
+    println(o.toBlockingObservable.toList)
+  }
+
   @Test def schedulerExample1(): Unit = {
     val latch = new CountDownLatch(1)
     val worker = IOScheduler().createWorker