michael@0: // Clearing a breakpoint by handler can clear multiple breakpoints.
michael@0: 
michael@0: var g = newGlobal();
michael@0: var dbg = Debugger(g);
michael@0: var s;
michael@0: dbg.onDebuggerStatement = function (frame) {
michael@0:     s = frame.eval("f").return.script;
michael@0: };
michael@0: g.eval("var line0 = Error().lineNumber;\n" +
michael@0:        "function f(a, b) {\n" +     // line0 + 1
michael@0:        "    return a + b;\n" +      // line0 + 2
michael@0:        "}\n" +
michael@0:        "debugger;\n");
michael@0: 
michael@0: var hits = 0;
michael@0: var handler = {hit: function (frame) { hits++; s.clearBreakpoint(handler); }};
michael@0: var offs = s.getLineOffsets(g.line0 + 2);
michael@0: for (var i = 0; i < 4; i++) {
michael@0:     for (var j = 0; j < offs.length; j++)
michael@0:         s.setBreakpoint(offs[j], handler);
michael@0: }
michael@0: 
michael@0: assertEq(g.f(2, 2), 4);
michael@0: assertEq(hits, 1);
michael@0: assertEq(s.getBreakpoints().length, 0);