test rename overhaul: step 8 - language tests

tests/language/src/IsFunctionTest.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-var staticClosure;
-staticMethod() => 42;
-
-class B {
-  var instanceClosure;
-  var nullField;
-  instanceMethod() => 43;
-}
-
-checkUntyped(closure) {
-  Expect.isTrue(closure is Function);
-}
-
-checkTyped(int closure()) {
-  Expect.isTrue(closure is Function);
-}
-
-checkTypedNull(int closure()) {
-  Expect.isFalse(closure is Function);
-}
-
-checkUntypedNull(closure) {
-  Expect.isFalse(closure is Function);
-}
-
-main() {
-  staticClosure = () => 44;
-  B b = new B();
-  b.instanceClosure = () => 45;
-
-  closureStatement() => 46;
-  var closureExpression = () => 47;
-
-  checkUntyped(staticClosure);
-  checkTyped(staticClosure);
-
-  checkUntyped(staticMethod);
-  checkTyped(staticMethod);
-
-  checkUntyped(b.instanceClosure);
-  checkTyped(b.instanceClosure);
-
-  checkUntyped(b.instanceMethod);
-  checkTyped(b.instanceMethod);
-
-  checkUntyped(closureStatement);
-  checkTyped(closureStatement);
-
-  checkUntyped(closureExpression);
-  checkTyped(closureExpression);
-
-  checkTypedNull(b.nullField);
-  checkUntypedNull(b.nullField);
-}