michael@0: // getLineOffsets identifies multiple ways to land on a line.
michael@0: 
michael@0: var g = newGlobal();
michael@0: g.line0 = null;
michael@0: var dbg = Debugger(g);
michael@0: var where;
michael@0: dbg.onDebuggerStatement = function (frame) {
michael@0:     var s = frame.script, lineno, offs;
michael@0: 
michael@0:     lineno = g.line0 + where;
michael@0:     offs = s.getLineOffsets(lineno);
michael@0:     for (var i = 0; i < offs.length; i++) {
michael@0:         assertEq(s.getOffsetLine(offs[i]), lineno);
michael@0:         s.setBreakpoint(offs[i], {hit: function () { g.log += 'B'; }});
michael@0:     }
michael@0: 
michael@0:     lineno++;
michael@0:     offs = s.getLineOffsets(lineno);
michael@0:     for (var i = 0; i < offs.length; i++) {
michael@0:         assertEq(s.getOffsetLine(offs[i]), lineno);
michael@0:         s.setBreakpoint(offs[i], {hit: function () { g.log += 'C'; }});
michael@0:     }
michael@0: 
michael@0:     g.log += 'A';
michael@0: };
michael@0: 
michael@0: function test(s) {
michael@0:     assertEq(s.charAt(s.length - 1), '\n');
michael@0:     var count = (s.split(/\n/).length - 1); // number of lines in s
michael@0:     g.log = '';
michael@0:     where = 1 + count;
michael@0:     g.eval("line0 = Error().lineNumber;\n" +
michael@0:            "debugger;\n" +          // line0 + 1
michael@0:            s +                      // line0 + 2 ... line0 + where
michael@0:            "log += 'D';\n");
michael@0:     assertEq(g.log, 'AB!CD');
michael@0: }
michael@0: 
michael@0: // if-statement with yes and no paths on a single line
michael@0: g.i = 0;
michael@0: test("if (i === 0)\n" +
michael@0:      "    log += '!'; else log += 'X';\n");
michael@0: test("if (i === 2)\n" +
michael@0:      "    log += 'X'; else log += '!';\n");
michael@0: 
michael@0: // break to a line that has code inside and outside the loop
michael@0: g.i = 2;
michael@0: test("while (1) {\n" +
michael@0:      "    if (i === 2) break;\n" +
michael@0:      "    log += 'X'; } log += '!';\n");
michael@0: 
michael@0: // leaving a while loop by failing the test, when the last line has stuff both inside and outside the loop
michael@0: g.i = 0;
michael@0: test("while (i > 0) {\n" +
michael@0:      "    if (i === 70) log += 'X';\n" +
michael@0:      "    --i;  } log += '!';\n");
michael@0: 
michael@0: // multiple case-labels on the same line
michael@0: g.i = 0;
michael@0: test("switch (i) {\n" +
michael@0:      "    case 0: case 1: log += '!'; break; }\n");
michael@0: test("switch ('' + i) {\n" +
michael@0:      "    case '0': case '1': log += '!'; break; }\n");
michael@0: test("switch (i) {\n" +
michael@0:      "    case 'ok' + i: case i - i: log += '!'; break; }\n");