Source-reparse.js - mozsearch

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// reparsing a source should produce equivalent scripts and avoid invoking the

// onNewScript hook.

const g = newGlobal({newCompartment: true});

const dbg = new Debugger;

dbg.addDebuggee(g);

let globalScript;

dbg.onNewScript = script => { globalScript = script };

// Leave `g()` on the first line so we can check that `columnNumber` is passed to the

// reparsed script (`columnNumber` is only used to offset breakpoint column on the first

// line of the script).

g.evaluate(`g();

function f() {

  for (var i = 0; i < 10; i++) {

    g();

function g() {

  return 3;

f();

`, {

  fileName: "foobar.js",

  lineNumber: 3,

  columnNumber: 42,

});

let onNewScriptCalls = 0;

dbg.onNewScript = script => { onNewScriptCalls++; };

const reparsedScript = globalScript.source.reparse();

assertEq(onNewScriptCalls, 0);

assertEq(reparsedScript.url, "foobar.js");

assertEq(reparsedScript.startLine, 3);

assertEq(reparsedScript.startColumn, 42);

// Test for the same breakpoint positions in the original and reparsed script.

function getBreakpointPositions(script) {

  const offsets = script.getPossibleBreakpoints();

  const str = offsets.map(({ lineNumber, columnNumber }) => `${lineNumber}:${columnNumber}`).toString();

  const childPositions = script.getChildScripts().map(getBreakpointPositions);

  return str + childPositions.toString();

assertEq(getBreakpointPositions(globalScript), getBreakpointPositions(reparsedScript));