Fix vararg issues reported in https://github.com/Netflix/RxJava/issues/359

language-adaptors/rxjava-groovy/src/test/groovy/rx/lang/groovy/ObservableTests.groovy

@@ -155,6 +155,30 @@ def class ObservableTests {
         verify(a, times(1)).received("hello_2");
     }
 
+    @Test
+    public void testFromWithIterable() {
+        def list = [1, 2, 3, 4, 5]
+        assertEquals(5, Observable.from(list).count().toBlockingObservable().single());
+    }
+
+    @Test
+    public void testFromWithObjects() {
+        def list = [1, 2, 3, 4, 5]
+        // this should now treat these as 2 objects so have a count of 2
+        assertEquals(2, Observable.from(list, 6).count().toBlockingObservable().single());
+    }
+
+    /**
+     * Check that two different single arg methods are selected correctly
+     */
+    @Test
+    public void testStartWith() {
+        def list = [10, 11, 12, 13, 14]
+        def startList = [1, 2, 3, 4, 5]
+        assertEquals(6, Observable.from(list).startWith(0).count().toBlockingObservable().single());
+        assertEquals(10, Observable.from(list).startWith(startList).count().toBlockingObservable().single());
+    }
+
     @Test
     public void testScriptWithOnNext() {
         new TestFactory().getObservable().subscribe({ result -> a.received(result)});

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

@@ -75,7 +75,7 @@ class UnitTestSuite extends JUnitSuite {
     }
 
     @Test def testSingleOrDefault {
-        assertEquals(0, Observable.from[Int]().toBlockingObservable.singleOrDefault(0))
+        assertEquals(0, Observable.empty[Int]().toBlockingObservable.singleOrDefault(0))
         assertEquals(1, Observable.from(1).toBlockingObservable.singleOrDefault(0))
         try {
             Observable.from(1, 2, 3).toBlockingObservable.singleOrDefault(0)
@@ -135,8 +135,7 @@ class UnitTestSuite extends JUnitSuite {
     @Test def testMerge {
         val observable1 = Observable.from(1, 2, 3)
         val observable2 = Observable.from(4, 5, 6)
-        val observableList = List(observable1, observable2).asJava
-        val merged = Observable.merge(observableList)
+        val merged = Observable.merge(observable1, observable2)
         assertSubscribeReceives(merged)(1, 2, 3, 4, 5, 6)
     }
 
@@ -232,13 +231,13 @@ class UnitTestSuite extends JUnitSuite {
     @Test def testLastOrDefault {
         val observable = Observable.from(1, 2, 3, 4)
         assertEquals(4, observable.toBlockingObservable.lastOrDefault(5))
-        assertEquals(5, Observable.from[Int]().toBlockingObservable.lastOrDefault(5))
+        assertEquals(5, Observable.empty[Int]().toBlockingObservable.lastOrDefault(5))
     }
 
     @Test def testLastOrDefaultPredicate {
         val observable = Observable.from(1, 2, 3, 4)
         assertEquals(3, observable.toBlockingObservable.lastOrDefault(5, isOdd))
-        assertEquals(5, Observable.from[Int]().toBlockingObservable.lastOrDefault(5, isOdd))
+        assertEquals(5, Observable.empty[Int]().toBlockingObservable.lastOrDefault(5, isOdd))
     }
 
     @Test def testMap {