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);