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 assertEq(Math.cbrt(1), 1);

 assertEq(Math.cbrt(-1), -1);

 var sloppy_tolerance = 200;  // FIXME

 assertNear(Math.cbrt(1e-300), 1e-100, sloppy_tolerance);

 assertNear(Math.cbrt(-1e-300), -1e-100, sloppy_tolerance);

 var cbrt_data = [

     [ Math.E, 1.3956124250860895 ], 

     [ Math.PI, 1.4645918875615231 ], 

     [ Math.LN2, 0.8849970445005177 ], 

     [ Math.SQRT2, 1.1224620483093728 ]

 ];

 for (var [x, y] of cbrt_data)

     assertNear(Math.cbrt(x), y, sloppy_tolerance);

 reportCompare(0, 0, "ok");