Stage ES6 generators

test/mjsunit/harmony/generators-relocation.js

-// Copyright 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --expose-debug-as debug --harmony-generators
-
-var Debug = debug.Debug;
-
-function assertIteratorResult(value, done, result) {
-  assertEquals({value: value, done: done}, result);
-}
-
-function RunTest(formals_and_body, args, value1, value2) {
-  // A null listener. It isn't important what the listener does.
-  function listener(event, exec_state, event_data, data) {
-  }
-
-  // Create the generator function outside a debugging context. It will probably
-  // be lazily compiled.
-  var gen = (function*(){}).constructor.apply(null, formals_and_body);
-
-  // Instantiate the generator object.
-  var obj = gen.apply(null, args);
-
-  // Advance to the first yield.
-  assertIteratorResult(value1, false, obj.next());
-
-  // Add a breakpoint on line 3 (the second yield).
-  var bp = Debug.setBreakPoint(gen, 3);
-
-  // Enable the debugger, which should force recompilation of the generator
-  // function and relocation of the suspended generator activation.
-  Debug.setListener(listener);
-
-  // Check that the generator resumes and suspends properly.
-  assertIteratorResult(value2, false, obj.next());
-
-  // Disable debugger -- should not force recompilation.
-  Debug.clearBreakPoint(bp);
-  Debug.setListener(null);
-
-  // Run to completion.
-  assertIteratorResult(undefined, true, obj.next());
-}
-
-function prog(a, b, c) {
-  return a + ';\n' + 'yield ' + b + ';\n' + 'yield ' + c;
-}
-
-// Simple empty local scope.
-RunTest([prog('', '1', '2')], [], 1, 2);
-
-RunTest([prog('for (;;) break', '1', '2')], [], 1, 2);
-
-RunTest([prog('while (0) foo()', '1', '2')], [], 1, 2);
-
-RunTest(['a', prog('var x = 3', 'a', 'x')], [1], 1, 3);
-
-RunTest(['a', prog('', '1', '2')], [42], 1, 2);
-
-RunTest(['a', prog('for (;;) break', '1', '2')], [42], 1, 2);