Tests that order matters in import nullification

Author: som-snytt

test/files/neg/yimports-order.check

@@ -0,0 +1,10 @@
+yimports-order.scala:9: error: not found: value Map
+      def f() = Map("hello" -> "world")
+                ^
+yimports-order.scala:9: error: value -> is not a member of String
+      def f() = Map("hello" -> "world")
+                            ^
+yimports-order.scala:10: error: not found: value println
+      def g() = println(f())
+                ^
+three errors found

test/files/neg/yimports-order.scala

@@ -0,0 +1,13 @@
+
+package top {
+  package middle {
+    class C {
+      def c() = println("hello, world")
+    }
+    import Predef.{Map => _}
+    object Test {
+      def f() = Map("hello" -> "world")
+      def g() = println(f())
+    }
+  }
+}

test/files/pos/yimports-order-b.scala

@@ -0,0 +1,17 @@
+
+package top {
+  package middle {
+    import bottom.B.b
+    class C {
+      def p() = println("hello, world")
+      def f = b     // comment me to see Predef exclusion
+    }
+  }
+}
+
+package bottom {
+  import Predef.{Set => _}
+  object B {
+    def b = Set(42)
+  }
+}