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// Test that we can capture only the N newest frames.
// This is the maxFrameCount argument to JS::CaptureCurrentStack.
load(libdir + 'asserts.js');
function recur(n, limit) {
if (n > 0)
return recur(n - 1, limit);
return saveStack(limit);
}
// Negative values are rejected.
assertThrowsInstanceOf(() => saveStack(-1), TypeError);
// Zero means 'no limit'.
assertEq(saveStack(0).parent, null);
assertEq(recur(0, 0).parent !== null, true);
assertEq(recur(0, 0).parent.parent, null);
assertEq(recur(1, 0).parent.parent.parent, null);
assertEq(recur(2, 0).parent.parent.parent.parent, null);
assertEq(recur(3, 0).parent.parent.parent.parent.parent, null);
// limit of 1
assertEq(saveStack(1).parent, null);
assertEq(recur(0, 1).parent, null);
assertEq(recur(0, 1).parent, null);
assertEq(recur(1, 1).parent, null);
assertEq(recur(2, 1).parent, null);
// limit of 2
assertEq(saveStack(2).parent, null);
assertEq(recur(0, 2).parent !== null, true);
assertEq(recur(0, 2).parent.parent, null);
assertEq(recur(1, 2).parent.parent, null);
assertEq(recur(2, 2).parent.parent, null);
// limit of 3
assertEq(saveStack(3).parent, null);
assertEq(recur(0, 3).parent !== null, true);
assertEq(recur(0, 3).parent.parent, null);
assertEq(recur(1, 3).parent.parent.parent, null);
assertEq(recur(2, 3).parent.parent.parent, null);
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