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