//set flag JSONSpecialIntegral_debug.

svoid test_JSONSpecialIntegral() {

  new JSONSpecialIntegral integral;

  integral.analyze([[{"abcdefghijklmnop": "abcdefghijklmnopq", "abcdefghijklmnopq": ["abc","abcdefghijklmnop"]}]]);

  print(integral.stats()); 

  print(sfuWithIndent(1, integral));

  int n = integral.n();

  embedded void descend(int i, int iEnd, int remainingDepth) {

    printVars descend(i, iEnd, remainingDepth);

    if (i >= iEnd || remainingDepth <= 0) ret; // out of characters or depth

    // bracket level at start, bracket level at end

    int lvlLeft = integral.bracketLevel(i-1);

    int lvlRight = integral.bracketLevel(iEnd-1);

    // count at start, count at end

    int cntLeft = integral.bracketCount(i-1);

    int cntRight = integral.bracketCount(iEnd-1);

    int brackets = cntRight-cntLeft;

    print("Brackets in range " + i + " to " + iEnd + ": " + brackets);

    if (brackets == 0) ret;

    int iMid = (i+iEnd) >> 1;

    descend(i, i, iMid);

    descend(i, iMid, iEnd);

  }

  int lvl = integral.bracketLevel(n-1);

  if (lvl != 0)

    fail("Bad brackets: level at end is " + lvl);

  int depth = 1;

  descend(0, n, depth);

}