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Add test for scale.log.
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‎test/scale/log-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.scale.log");
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suite.addBatch({
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"log": {
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topic: function() {
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return d3.scale.log;
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},
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"has the default domain [1, 10]": function(log) {
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var x = log();
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assert.deepEqual(x.domain(), [1, 10]);
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assert.inDelta(x(5), 0.69897, 1e-6);
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},
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"has the default range [0, 1]": function(log) {
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var x = log();
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assert.deepEqual(x.range(), [0, 1]);
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assert.inDelta(x.invert(.5), 3.162278, 1e-6);
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},
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"has the default interpolator d3.interpolate": function(log) {
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var x = log().range(["red", "blue"]);
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assert.equal(x.interpolate(), d3.interpolate);
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assert.equal(x(5), "rgb(77,0,178)");
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},
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"does not clamp by default": function(log) {
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var x = log();
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assert.isFalse(x.clamp());
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assert.inDelta(x(.5), -0.3010299, 1e-6);
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assert.inDelta(x(15), 1.1760913, 1e-6);
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},
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"maps a number to a number": function(log) {
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var x = log().domain([1, 2]);
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assert.inDelta(x(.5), -1, 1e-6);
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assert.inDelta(x(1), 0, 1e-6);
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assert.inDelta(x(1.5), 0.5849625, 1e-6);
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assert.inDelta(x(2), 1, 1e-6);
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assert.inDelta(x(2.5), 1.3219281, 1e-6);
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},
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"coerces domain to numbers": function(log) {
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var x = log().domain([new Date(1990, 0, 1), new Date(1991, 0, 1)]);
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assert.equal(typeof x.domain()[0], "number");
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assert.equal(typeof x.domain()[1], "number");
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assert.inDelta(x(new Date(1989, 09, 20)), -.2, 1e-2);
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assert.inDelta(x(new Date(1990, 00, 01)), 0, 1e-2);
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assert.inDelta(x(new Date(1990, 02, 15)), .2, 1e-2);
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assert.inDelta(x(new Date(1990, 04, 27)), .4, 1e-2);
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assert.inDelta(x(new Date(1991, 00, 01)), 1, 1e-2);
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assert.inDelta(x(new Date(1991, 02, 15)), 1.2, 1e-2);
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var x = log().domain(["1", "10"]);
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assert.equal(typeof x.domain()[0], "number");
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assert.equal(typeof x.domain()[1], "number");
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assert.inDelta(x(5), 0.69897, 1e-6);
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var x = log().domain([new Number(1), new Number(10)]);
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assert.equal(typeof x.domain()[0], "number");
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assert.equal(typeof x.domain()[1], "number");
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assert.inDelta(x(5), 0.69897, 1e-6);
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},
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"does not coerce range to numbers": function(log) {
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var x = log().range(["0", "2"]);
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assert.equal(typeof x.range()[0], "string");
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assert.equal(typeof x.range()[1], "string");
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},
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"coerces range value to number on invert": function(log) {
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var x = log().range(["0", "2"]);
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assert.inDelta(x.invert("1"), 3.1622777, 1e-6);
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var x = log().range([new Date(1990, 0, 1), new Date(1991, 0, 1)]);
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assert.inDelta(x.invert(new Date(1990, 6, 2, 13)), 3.1622777, 1e-6);
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var x = log().range(["#000", "#fff"]);
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assert.isNaN(x.invert("#999"));
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},
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"can specify negative domain values": function(log) {
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var x = log().domain([-100, -1]);
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assert.deepEqual(x.ticks().map(x.tickFormat()), [-100, -90, -80, -70, -60, -50, -40, -30, -20, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1]);
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assert.inDelta(x(-50), 0.150515, 1e-6);
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},
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"can specify range values as colors": function(log) {
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var x = log().range(["red", "blue"]);
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assert.equal(x(5), "rgb(77,0,178)");
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var x = log().range(["#ff0000", "#0000ff"]);
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assert.equal(x(5), "rgb(77,0,178)");
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var x = log().range(["#f00", "#00f"]);
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assert.equal(x(5), "rgb(77,0,178)");
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var x = log().range([d3.rgb(255,0,0), d3.hsl(240,1,.5)]);
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assert.equal(x(5), "rgb(77,0,178)");
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var x = log().range(["hsl(0,100%,50%)", "hsl(240,100%,50%)"]);
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assert.equal(x(5), "rgb(77,0,178)");
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},
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"can specify range values as arrays or objects": function(log) {
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var x = log().range([{color: "red"}, {color: "blue"}]);
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assert.deepEqual(x(5), {color: "rgb(77,0,178)"});
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var x = log().range([["red"], ["blue"]]);
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assert.deepEqual(x(5), ["rgb(77,0,178)"]);
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},
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"can specify a custom interpolator": function(log) {
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var x = log().range(["red", "blue"]).interpolate(d3.interpolateHsl);
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assert.equal(x(5), "#00ffcb");
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},
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"can clamp to the domain": function(log) {
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var x = log().clamp(true);
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assert.inDelta(x(.5), 0, 1e-6);
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assert.inDelta(x(5), 0.69897, 1e-6);
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assert.inDelta(x(15), 1, 1e-6);
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var x = log().domain([10, 1]).clamp(true);
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assert.inDelta(x(.5), 1, 1e-6);
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assert.inDelta(x(5), 0.30103, 1e-6);
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assert.inDelta(x(15), 0, 1e-6);
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},
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"can generate ticks": function(log) {
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var x = log();
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assert.deepEqual(x.ticks().map(x.tickFormat()), [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
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var x = log().domain([100, 1]);
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assert.deepEqual(x.ticks().map(x.tickFormat()), [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100]);
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},
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"can nice the domain, extending it to powers of ten": function(log) {
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var x = log().domain([1.1, 10.9]).nice();
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assert.deepEqual(x.domain(), [1, 100]);
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var x = log().domain([10.9, 1.1]).nice();
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assert.deepEqual(x.domain(), [100, 1]);
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var x = log().domain([.7, 11.001]).nice();
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assert.deepEqual(x.domain(), [.1, 100]);
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var x = log().domain([123.1, 6.7]).nice();
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assert.deepEqual(x.domain(), [1000, 1]);
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var x = log().domain([.01, .49]).nice();
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assert.deepEqual(x.domain(), [.01, 1]);
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},
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"can specify a polylinear domain and range": function(log) {
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var x = log().domain([.1, 1, 100]).range(["red", "white", "green"]);
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assert.equal(x(.5), "rgb(255,178,178)");
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assert.equal(x(50), "rgb(38,147,38)");
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assert.equal(x(75), "rgb(16,136,16)");
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}
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}
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});
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suite.export(module);

‎test/scale/test-log.js‎

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This file was deleted.

‎test/scale/test-log.out‎

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This file was deleted.

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