Add more varargs tests (again)

Author: TheElectronWill

tests/neg/varargs-annot.scala

@@ -13,6 +13,7 @@ object Test {
 
   @varargs def nov(a: Int) = 0 // error: A method without repeated parameters cannot be annotated with @varargs
   @varargs def v(a: Int, b: String*) = a + b.length // ok
+  def v(a: Int, b: String) = a // ok
 
   @varargs def v2(a: Int, b: String*) = 0 // error
   def v2(a: Int, b: Array[String]) = 0

tests/run/vararg-extend-java/Vararg.java

@@ -0,0 +1,3 @@
+public class Vararg {
+  void v(int... i) {}
+}

tests/run/vararg-extend-java/VarargAbstract.java

@@ -0,0 +1,4 @@
+public abstract class VarargAbstract {
+  public abstract void v1(String... s);
+  public abstract void v2(String... s);
+}

tests/run/vararg-extend-java/test.scala

@@ -0,0 +1,28 @@
+import scala.annotation.varargs
+
+class VarargImpl extends VarargAbstract {
+  def v1(s: String*) = ()
+
+  override def v2(s: String*) = ()
+}
+
+class VarargSub extends Vararg {
+  override def v(i: Int*) = ()
+}
+
+object Test {
+  def main(args: Array[String]): Unit =
+    val a: VarargAbstract = VarargImpl()
+    a.v1("a", "b", "c")
+    a.v2("a", "b", "c")
+
+    val i: VarargImpl = VarargImpl()
+    i.v1("a", "b", "c")
+    i.v2("a", "b", "c")
+
+    val b: Vararg = VarargSub()
+    b.v(1, 2, 3)
+
+    val c: VarargSub = VarargSub()
+    c.v(1, 2, 3)
+}