var vows = require(“vows”),

load = require("../load"),
assert = require("../assert");

var suite = vows.describe(“d3.round”);

suite.addBatch({

"round": {
  topic: load("format/round").expression("d3.round"),
  "returns a number": function(round) {
    assert.isNumber(round(42));
  },
  "returns zero for zero": function(round) {
    assert.equal(round(0), 0);
  },
  "ignores degenerate input": function(round) {
    assert.isNaN(round(NaN));
    assert.equal(round(Infinity), Infinity);
    assert.equal(round(-Infinity), -Infinity);
  },
  "returns integers by default": function(round) {
    assert.equal(round(10.6), 11);
    assert.equal(round(10.4), 10);
    assert.equal(round(0.6), 1);
    assert.equal(round(0.4), 0);
    assert.equal(round(-0.6), -1);
    assert.equal(round(-0.4), 0);
    assert.equal(round(-10.6), -11);
    assert.equal(round(-10.4), -10);
  },
  "rounds to the specified decimal place": function(round) {
    assert.inDelta(round(10.56, 1), 10.6, 1e-6);
    assert.inDelta(round(10.54, 1), 10.5, 1e-6);
    assert.inDelta(round(0.56, 1), 0.6, 1e-6);
    assert.inDelta(round(0.54, 1), 0.5, 1e-6);
    assert.inDelta(round(-0.56, 1), -0.6, 1e-6);
    assert.inDelta(round(-0.54, 1), -0.5, 1e-6);
    assert.inDelta(round(-10.56, 1), -10.6, 1e-6);
    assert.inDelta(round(-10.54, 1), -10.5, 1e-6);
    assert.inDelta(round(10.556, 2), 10.56, 1e-6);
    assert.inDelta(round(10.554, 2), 10.55, 1e-6);
    assert.inDelta(round(0.556, 2), 0.56, 1e-6);
    assert.inDelta(round(0.554, 2), 0.55, 1e-6);
    assert.inDelta(round(-0.556, 2), -0.56, 1e-6);
    assert.inDelta(round(-0.554, 2), -0.55, 1e-6);
    assert.inDelta(round(-10.556, 2), -10.56, 1e-6);
    assert.inDelta(round(-10.554, 2), -10.55, 1e-6);
  },
  "rounds to the specified significant digits": function(round) {
    assert.equal(round(123.45, -1), 120);
    assert.equal(round(345.67, -1), 350);
    assert.equal(round(-123.45, -1), -120);
    assert.equal(round(-345.67, -1), -350);
    assert.equal(round(123.45, -2), 100);
    assert.equal(round(456.78, -2), 500);
    assert.equal(round(-123.45, -2), -100);
    assert.equal(round(-456.78, -2), -500);
    assert.equal(round(123.45, -3), 0);
    assert.equal(round(567.89, -3), 1000);
    assert.equal(round(-123.45, -3), 0);
    assert.equal(round(-567.89, -3), -1000);
  }
}

});

suite.export(module);