Renamed *.jet to *.kt in test data of JetPsiCheckerTest.

idea/testData/checker/NamespaceQualified.kt

@@ -0,0 +1,42 @@
+package a
+
+    import java.*
+    import java.util.*
+
+/////////////////////////////////////////////////////////////////////////
+
+fun done<O>(result : O) : Iteratee<Any?, O> = StrangeIterateeImpl<Any?, O>(result)
+
+abstract class Iteratee<in I, out O> {
+  abstract fun process(item : I) : Iteratee<I, O>
+  abstract val isDone : Boolean
+  abstract val result : O
+  abstract fun done() : O
+}
+
+class StrangeIterateeImpl<in I, out O>(val obj: O) : Iteratee<I, O>() {
+    override fun process(item: I): Iteratee<I, O> = StrangeIterateeImpl<I, O>(obj)
+    override val isDone = true
+    override val result = obj
+    override fun done() = obj
+}
+
+abstract class Sum() : Iteratee<Int, Int>() {
+  override fun process(item : Int) : Iteratee<Int, Int> {
+    return a.done<Int>(item);
+  }
+  abstract override val isDone : Boolean
+  abstract override val result : Int
+  abstract override fun done() : Int
+}
+
+abstract class Collection<E> : Iterable<E> {
+  fun iterate<O>(var iteratee : Iteratee<E, O>) : O {
+      for (x in this) {
+        val it = iteratee.process(x)
+        if (it.isDone) return it.result
+        iteratee = it
+      }
+      return iteratee.done()
+  }
+}