Reject local classes without crashing

1 files changed, 83 insertions, 0 deletions

diff --git a/src/test/scala/scala/async/neg/LocalClasses0Spec.scala b/src/test/scala/scala/async/neg/LocalClasses0Spec.scala
new file mode 100644
index 0000000..4bf3ce8
--- /dev/null
+++ b/src/test/scala/scala/async/neg/LocalClasses0Spec.scala
@@ -0,0 +1,83 @@
+package scala.async
+package neg
+
+/**
+ * Copyright (C) 2012 Typesafe Inc. <http://www.typesafe.com>
+ */
+
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import org.junit.Test
+
+@RunWith(classOf[JUnit4])
+class LocalClasses0Spec {
+
+  @Test
+  def `An async block should reject local classes 1`() {
+    expectError("Local class Person illegal within `async` block", "-cp target/scala-2.10/classes -deprecation -Xfatal-warnings") {
+      """
+        | import scala.async.Async._
+        | async {
+        |   case class Person(name: String)
+        | }
+      """.stripMargin
+    }
+  }
+
+  @Test
+  def `An async block should reject local classes 2`() {
+    expectError("Local class Person illegal within `async` block", "-cp target/scala-2.10/classes -deprecation -Xfatal-warnings") {
+      """
+        | import scala.concurrent.{Future, ExecutionContext}
+        | import ExecutionContext.Implicits.global
+        | import scala.async.Async._
+        | async {
+        |   case class Person(name: String)
+        |   val fut = Future { 5 }
+        |   val x = await(fut)
+        |   x
+        | }
+      """.stripMargin
+    }
+  }
+
+  @Test
+  def `An async block should reject local classes 3`() {
+    expectError("Local class Person illegal within `async` block", "-cp target/scala-2.10/classes -deprecation -Xfatal-warnings") {
+      """
+        | import scala.concurrent.{Future, ExecutionContext}
+        | import ExecutionContext.Implicits.global
+        | import scala.async.Async._
+        | async {
+        |   val fut = Future { 5 }
+        |   val x = await(fut)
+        |   case class Person(name: String)
+        |   x
+        | }
+      """.stripMargin
+    }
+  }
+
+  @Test
+  def `An async block should reject a nested local class`() {
+    expectError("Local class Person illegal within `async` block", "-cp target/scala-2.10/classes -deprecation -Xfatal-warnings") {
+      """
+        | import scala.concurrent.{Future, ExecutionContext}
+        | import ExecutionContext.Implicits.global
+        | import scala.async.Async._
+        | async {
+        |   val fut = Future { 5 }
+        |   val x = 2 + 2
+        |   var y = 0
+        |   if (x > 0) {
+        |     case class Person(name: String)
+        |     y = await(fut)
+        |   } else {
+        |     y = x
+        |   }
+        |   y
+        | }
+      """.stripMargin
+    }
+  }
+}