1 require("../env");

     2 require("../../d3");

     3 

     4 var vows = require("vows"),

     5     assert = require("assert");

     6 

     7 var suite = vows.describe("d3.round");

     8 

     9 suite.addBatch({

    10   "round": {

    11     topic: function() {

    12       return d3.round;

    13     },

    14     "returns a number": function(round) {

    15       assert.isNumber(round(42));

    16     },

    17     "returns zero for zero": function(round) {

    18       assert.equal(round(0), 0);

    19     },

    20     "ignores degenerate input": function(round) {

    21       assert.isNaN(round(NaN));

    22       assert.equal(round(Infinity), Infinity);

    23       assert.equal(round(-Infinity), -Infinity);

    24     },

    25     "returns integers by default": function(round) {

    26       assert.equal(round(10.6), 11);

    27       assert.equal(round(10.4), 10);

    28       assert.equal(round(0.6), 1);

    29       assert.equal(round(0.4), 0);

    30       assert.equal(round(-0.6), -1);

    31       assert.equal(round(-0.4), 0);

    32       assert.equal(round(-10.6), -11);

    33       assert.equal(round(-10.4), -10);

    34     },

    35     "rounds to the specified decimal place": function(round) {

    36       assert.inDelta(round(10.56, 1), 10.6, 1e-6);

    37       assert.inDelta(round(10.54, 1), 10.5, 1e-6);

    38       assert.inDelta(round(0.56, 1), 0.6, 1e-6);

    39       assert.inDelta(round(0.54, 1), 0.5, 1e-6);

    40       assert.inDelta(round(-0.56, 1), -0.6, 1e-6);

    41       assert.inDelta(round(-0.54, 1), -0.5, 1e-6);

    42       assert.inDelta(round(-10.56, 1), -10.6, 1e-6);

    43       assert.inDelta(round(-10.54, 1), -10.5, 1e-6);

    44       assert.inDelta(round(10.556, 2), 10.56, 1e-6);

    45       assert.inDelta(round(10.554, 2), 10.55, 1e-6);

    46       assert.inDelta(round(0.556, 2), 0.56, 1e-6);

    47       assert.inDelta(round(0.554, 2), 0.55, 1e-6);

    48       assert.inDelta(round(-0.556, 2), -0.56, 1e-6);

    49       assert.inDelta(round(-0.554, 2), -0.55, 1e-6);

    50       assert.inDelta(round(-10.556, 2), -10.56, 1e-6);

    51       assert.inDelta(round(-10.554, 2), -10.55, 1e-6);

    52     },

    53     "rounds to the specified significant digits": function(round) {

    54       assert.equal(round(123.45, -1), 120);

    55       assert.equal(round(345.67, -1), 350);

    56       assert.equal(round(-123.45, -1), -120);

    57       assert.equal(round(-345.67, -1), -350);

    58       assert.equal(round(123.45, -2), 100);

    59       assert.equal(round(456.78, -2), 500);

    60       assert.equal(round(-123.45, -2), -100);

    61       assert.equal(round(-456.78, -2), -500);

    62       assert.equal(round(123.45, -3), 0);

    63       assert.equal(round(567.89, -3), 1000);

    64       assert.equal(round(-123.45, -3), 0);

    65       assert.equal(round(-567.89, -3), -1000);

    66     }

    67   }

    68 });

    69 

    70 suite.export(module);