michael@0: // After returning from an implicit toString call, the calling frame's onStep
michael@0: // hook fires.
michael@0: 
michael@0: var g = newGlobal();
michael@0: g.eval("var originalX = {toString: function () { debugger; log += 'x'; return 1; }};\n");
michael@0: 
michael@0: var dbg = Debugger(g);
michael@0: dbg.onDebuggerStatement = function (frame) {
michael@0:     g.log += 'd';
michael@0:     frame.older.onStep = function () {
michael@0:         if (!g.log.match(/[sy]$/))
michael@0:             g.log += 's';
michael@0:     };
michael@0: };
michael@0: 
michael@0: // expr is an expression that will trigger an implicit toString call.
michael@0: function check(expr) {
michael@0:     g.log = '';
michael@0:     g.x = g.originalX;
michael@0:     g.eval(expr + ";\n" +
michael@0: 	   "log += 'y';\n");
michael@0:     assertEq(g.log, 'dxsy');
michael@0: }
michael@0: 
michael@0: check("'' + x");
michael@0: check("0 + x");
michael@0: check("0 - x");
michael@0: check("0 * x");
michael@0: check("0 / x");
michael@0: check("0 % x");
michael@0: check("+x");
michael@0: check("x in {}");
michael@0: check("x++");
michael@0: check("++x");
michael@0: check("x--");
michael@0: check("--x");
michael@0: check("x < 0");
michael@0: check("x > 0");
michael@0: check("x >= 0");
michael@0: check("x <= 0");
michael@0: check("x == 0");
michael@0: check("x != 0");
michael@0: check("x & 1");
michael@0: check("x | 1");
michael@0: check("x ^ 1");
michael@0: check("~x");
michael@0: check("x << 1");
michael@0: check("x >> 1");
michael@0: check("x >>> 1");
michael@0: 
michael@0: g.eval("function lastStep() { throw StopIteration; }");
michael@0: g.eval("function emptyIterator() { debugger; log += 'x'; return { next: lastStep }; }");
michael@0: g.eval("var customEmptyIterator = { __iterator__: emptyIterator };");
michael@0: g.log = '';
michael@0: g.eval("for (i in customEmptyIterator);\n" +
michael@0:        "log += 'y';\n");
michael@0: assertEq(g.log, 'dxsy');
michael@0: 
michael@0: g.eval("var getter = { get x() { debugger; return log += 'x'; } }");
michael@0: check("getter.x");
michael@0: 
michael@0: g.eval("var setter = { set x(v) { debugger; return log += 'x'; } }");
michael@0: check("setter.x = 1");
michael@0: 
michael@0: g.eval("Object.defineProperty(this, 'thisgetter', { get: function() { debugger; log += 'x'; }});");
michael@0: check("thisgetter");