1 files changed, 109 insertions, 0 deletions
diff --git a/examples/scala-js/compiler/src/test/scala/scala/scalajs/compiler/test/OptimizationTest.scala b/examples/scala-js/compiler/src/test/scala/scala/scalajs/compiler/test/OptimizationTest.scala
new file mode 100644
index 0000000..7f15c7a
--- /dev/null
+++ b/examples/scala-js/compiler/src/test/scala/scala/scalajs/compiler/test/OptimizationTest.scala
@@ -0,0 +1,109 @@
+package scala.scalajs.compiler.test
+
+import util._
+
+import org.junit.Test
+
+import scala.scalajs.ir.{Trees => js, Types => jstpe}
+
+class OptimizationTest extends JSASTTest {
+
+  @Test
+  def unwrapScalaFunWrapper: Unit = {
+
+    // Make sure we do not wrap and unwrap right away
+    """
+    import scala.scalajs.js
+
+    class A {
+      val jsFun: js.Function = (x: Int) => x * 2
+    }
+    """.
+    hasNot("runtime.AnonFunction ctor") {
+      case js.New(jstpe.ClassType("sjsr_AnonFunction1"), _, _) =>
+    }
+
+    // Make sure our wrapper matcher has the right name
+    """
+    import scala.scalajs.js
+
+    class A {
+      val scalaFun = (x: Int) => x * 2
+      val jsFun: js.Function = scalaFun
+    }
+    """.
+    has("runtime.AnonFunction ctor") {
+      case js.New(jstpe.ClassType("sjsr_AnonFunction1"), _, _) =>
+    }
+
+    /* Make sure js.Array(...) is optimized away completely for several kinds
+     * of data types.
+     */
+    """
+    import scala.scalajs.js
+
+    class VC(val x: Int) extends AnyVal
+
+    class A {
+      val a = js.Array(5, 7, 9, -3)
+      val b = js.Array("hello", "world")
+      val c = js.Array('a', 'b')
+      val d = js.Array(Nil)
+      val e = js.Array(new VC(151189))
+    }
+    """.
+    hasNot("any of the wrapArray methods") {
+      case js.Apply(_, js.Ident(name, _), _)
+          if name.startsWith("wrap") && name.endsWith("__scm_WrappedArray") =>
+    }
+
+    /* Make sure varargs are optimized to use js.WrappedArray instead of
+     * scm.WrappedArray, for various data types.
+     */
+    """
+    import scala.scalajs.js
+
+    class VC(val x: Int) extends AnyVal
+
+    class A {
+      val a = List(5, 7, 9, -3)
+      val b = List("hello", "world")
+      val c = List('a', 'b')
+      val d = List(Nil)
+      val e = List(new VC(151189))
+    }
+    """.
+    hasNot("any of the wrapArray methods") {
+      case js.Apply(_, js.Ident(name, _), _)
+          if name.startsWith("wrap") && name.endsWith("__scm_WrappedArray") =>
+    }
+
+    // Make sure our wrapper matcher has the right name
+    """
+    import scala.scalajs.js
+
+    class A {
+      val a: Seq[Int] = new Array[Int](5)
+    }
+    """.
+    has("one of the wrapArray methods") {
+      case js.Apply(_, js.Ident(name, _), _)
+          if name.startsWith("wrap") && name.endsWith("__scm_WrappedArray") =>
+    }
+
+    // Verify the optimized emitted code for 'new js.Object' and 'new js.Array'
+    """
+    import scala.scalajs.js
+
+    class A {
+      val o = new js.Object
+      val a = new js.Array
+    }
+    """.
+    hasNot("any reference to the global scope") {
+      case js.JSEnvInfo() =>
+    }
+
+  }
+
+}