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Add test for svg.line.radial.
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‎test/svg/line-radial-test.js‎

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require("../env");
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require("../../d3");
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var vows = require("vows"),
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assert = require("assert");
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var suite = vows.describe("d3.svg.line.radial");
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suite.addBatch({
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"line.radial": {
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topic: function() {
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return d3.svg.line.radial;
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},
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"radius defaults to a function accessor": function(line) {
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var l = line();
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assert.pathEqual(l([[10, 0], [20, 1], [20, 2], [10, 3]]), "M0,-10L16.82941969615793,-10.806046117362794L18.185948536513635,8.32293673094285L1.4112000805986715,9.899924966004454");
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assert.typeOf(l.radius(), "function");
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},
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"radius can be defined as a constant": function(line) {
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var l = line().radius(30);
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assert.pathEqual(l([[10, 0], [20, 1], [20, 2], [10, 3]]), "M0,-30L25.244129544236895,-16.20906917604419L27.278922804770453,12.484405096414275L4.233600241796014,29.699774898013363");
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assert.equal(l.radius(), 30);
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},
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"radius can be defined as a function": function(line) {
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var l = line().radius(f), t = {}, dd = [], ii = [], tt = [];
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function f(d, i) { dd.push(d); ii.push(i); tt.push(this); return 30; }
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assert.pathEqual(l.call(t, [[10, 0], [20, 1], [20, 2], [10, 3]]), "M0,-30L25.244129544236895,-16.20906917604419L27.278922804770453,12.484405096414275L4.233600241796014,29.699774898013363");
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assert.deepEqual(dd, [[10, 0], [20, 1], [20, 2], [10, 3]], "expected data, got {actual}");
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assert.deepEqual(ii, [0, 1, 2, 3], "expected index, got {actual}");
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assert.deepEqual(tt, [t, t, t, t], "expected this, got {actual}");
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},
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"angle defaults to a function accessor": function(line) {
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var l = line();
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assert.pathEqual(l([[10, 0], [20, 1], [20, 2], [10, 3]]), "M0,-10L16.82941969615793,-10.806046117362794L18.185948536513635,8.32293673094285L1.4112000805986715,9.899924966004454");
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assert.typeOf(l.angle(), "function");
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},
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"angle can be defined as a constant": function(line) {
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var l = line().angle(Math.PI / 2);
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assert.pathEqual(l([[10, 0], [20, 1], [20, 2], [10, 3]]), "M10,0L20,0L20,0L10,0");
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assert.equal(l.angle(), Math.PI / 2);
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},
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"angle can be defined as a function": function(line) {
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var l = line().angle(f), t = {}, dd = [], ii = [], tt = [];
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function f(d, i) { dd.push(d); ii.push(i); tt.push(this); return Math.PI / 2; }
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assert.pathEqual(l.call(t, [[10, 0], [20, 1], [20, 2], [10, 3]]), "M10,0L20,0L20,0L10,0");
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assert.deepEqual(dd, [[10, 0], [20, 1], [20, 2], [10, 3]], "expected data, got {actual}");
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assert.deepEqual(ii, [0, 1, 2, 3], "expected index, got {actual}");
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assert.deepEqual(tt, [t, t, t, t], "expected this, got {actual}");
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},
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"angle is defined in radians, with zero at 12 o'clock": function(line) {
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var l = line().angle(0);
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assert.pathEqual(l([[10, Math.PI], [20, Math.PI / 3]]), "M0,-10L0,-20");
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assert.equal(l.angle(), 0);
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},
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"interpolate defaults to linear": function(line) {
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assert.equal(line().interpolate(), "linear");
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},
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"interpolate can be defined as a constant": function(line) {
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var l = line().interpolate("cardinal");
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assert.pathEqual(l([[10, 0], [20, 1], [20, 2], [10, 3]]), "M0,-10Q15.010824842506567,-12.638339790457078,16.82941969615793,-10.806046117362794C19.557311976634978,-8.057605607721365,20.498681478847523,5.217041068437762,18.185948536513635,8.32293673094285Q16.64412657495771,10.393533839279574,1.4112000805986715,9.899924966004454");
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assert.equal(l.interpolate(), "cardinal");
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},
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// We could test the other interpolation modes here, but that'd be redundant.
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"tension defaults to .7": function(line) {
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assert.equal(line().tension(), .7);
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},
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"tension can be specified as a constant": function(line) {
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var l = line().tension(.5);
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assert.equal(l.tension(), .5);
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},
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"returns null if input points array is empty": function(line) {
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assert.isNull(line()([]));
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}
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}
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});
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suite.export(module);

‎test/svg/line-test.js‎

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assert.isNull(line()([]));
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},
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"interpolate(linear)": {
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"supports linear interpolation": function(line) {
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var l = line().interpolate("linear");
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assert.pathEqual(l([[0, 0], [1, 1], [2, 0], [3, 1], [4, 0]]), "M0,0L1,1L2,0L3,1L4,0");
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}
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},
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"interpolate(step)": {
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"supports step-before interpolation": function(line) {
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var l = line().interpolate("step-before");

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