debug-liveedit-patch-positions.js revision 6ded16be15dd865a9b21ea304d5273c8be299c87 
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27
28// Flags: --expose-debug-as debug
29// Get the Debug object exposed from the debug context global object.
30
31// Scenario: some function is being edited; the outer function has to have its
32// positions patched. Accoring to a special markup of function text
33// corresponding byte-code PCs should conicide before change and after it.
34
35Debug = debug.Debug
36
37eval(
38    "function F1() {  return 5; }\n" +
39    "function ChooseAnimal(/*$*/ ) {\n" +
40    "/*$*/ var x = F1(/*$*/ );\n" +
41    "/*$*/ var res/*$*/  =/*$*/ (function() { return 'Cat'; } )();\n" +
42    "/*$*/ var y/*$*/  = F2(/*$*/ F1()/*$*/ , F1(/*$*/ )/*$*/ );\n" +
43    "/*$*/ if (/*$*/ x.toString(/*$*/ )) { /*$*/ y = 3;/*$*/  } else {/*$*/  y = 8;/*$*/  }\n" +
44    "/*$*/ var z = /*$*/ x * y;\n" +
45    "/*$*/ return/*$*/  res/*$*/  + z;/*$*/  }\n" +
46    "function F2(x, y) { return x + y; }"
47);
48
49// Find all *$* markers in text of the function and read corresponding statement
50// PCs.
51function ReadMarkerPositions(func) {
52  var text = func.toString();
53  var positions = new Array();
54  var match;
55  var pattern = /\/\*\$\*\//g;
56  while ((match = pattern.exec(text)) != null) {
57    positions.push(match.index);
58  }
59  return positions;
60}
61
62function ReadPCMap(func, positions) {
63  var res = new Array();
64  for (var i = 0; i < positions.length; i++) {
65    res.push(Debug.LiveEdit.GetPcFromSourcePos(func, positions[i]));
66  }
67  return res;
68}
69
70var res = ChooseAnimal();
71assertEquals("Cat15", res);
72
73var markerPositionsBefore = ReadMarkerPositions(ChooseAnimal);
74var pcArrayBefore = ReadPCMap(ChooseAnimal, markerPositionsBefore);
75
76var script = Debug.findScript(ChooseAnimal);
77
78var orig_animal = "'Cat'";
79var patch_pos = script.source.indexOf(orig_animal);
80var new_animal_patch = "'Capybara'";
81
82var change_log = new Array();
83Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, patch_pos, orig_animal.length, new_animal_patch, change_log);
84print("Change log: " + JSON.stringify(change_log) + "\n");
85
86var res = ChooseAnimal();
87assertEquals("Capybara15", res);
88
89var markerPositionsAfter = ReadMarkerPositions(ChooseAnimal);
90var pcArrayAfter = ReadPCMap(ChooseAnimal, markerPositionsAfter);
91
92assertArrayEquals(pcArrayBefore, pcArrayAfter);
93
94