65 строки
3.0 KiB
JavaScript
65 строки
3.0 KiB
JavaScript
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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.quantile");
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suite.addBatch({
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"quantile": {
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topic: function() {
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return d3.scale.quantile;
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},
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"has the empty domain by default": function(quantile) {
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assert.isEmpty(quantile().domain());
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},
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"has the empty range by default": function(quantile) {
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assert.isEmpty(quantile().range());
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},
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"uses the R-7 algorithm to compute quantiles": function(quantile) {
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var x = d3.scale.quantile().domain([3, 6, 7, 8, 8, 10, 13, 15, 16, 20]).range([0, 1, 2, 3]);
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assert.deepEqual([3, 6, 6.9, 7, 7.1].map(x), [0, 0, 0, 0, 0]);
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assert.deepEqual([8, 8.9].map(x), [1, 1]);
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assert.deepEqual([9, 9.1, 10, 13].map(x), [2, 2, 2, 2]);
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assert.deepEqual([14.9, 15, 15.1, 16, 20].map(x), [3, 3, 3, 3, 3]);
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var x = d3.scale.quantile().domain([3, 6, 7, 8, 8, 9, 10, 13, 15, 16, 20]).range([0, 1, 2, 3]);
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assert.deepEqual([3, 6, 6.9, 7, 7.1].map(x), [0, 0, 0, 0, 0]);
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assert.deepEqual([8, 8.9].map(x), [1, 1]);
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assert.deepEqual([9, 9.1, 10, 13].map(x), [2, 2, 2, 2]);
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assert.deepEqual([14.9, 15, 15.1, 16, 20].map(x), [3, 3, 3, 3, 3]);
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},
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"domain values are sorted in ascending order": function(quantile) {
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var x = d3.scale.quantile().domain([6, 3, 7, 8, 8, 13, 20, 15, 16, 10]);
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assert.deepEqual(x.domain(), [3, 6, 7, 8, 8, 10, 13, 15, 16, 20]);
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},
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"non-numeric domain values are ignored": function(quantile) {
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var x = d3.scale.quantile().domain([6, 3, NaN, undefined, 7, 8, 8, 13, 20, 15, 16, 10, NaN]);
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assert.deepEqual(x.domain(), [3, 6, 7, 8, 8, 10, 13, 15, 16, 20]);
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},
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"quantiles returns the inner thresholds": function(quantile) {
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var x = d3.scale.quantile().domain([3, 6, 7, 8, 8, 10, 13, 15, 16, 20]).range([0, 1, 2, 3]);
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assert.deepEqual(x.quantiles(), [7.25, 9, 14.5]);
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var x = d3.scale.quantile().domain([3, 6, 7, 8, 8, 9, 10, 13, 15, 16, 20]).range([0, 1, 2, 3]);
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assert.deepEqual(x.quantiles(), [7.5, 9, 14]);
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},
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"range cardinality determines the number of quantiles": function(quantile) {
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var x = d3.scale.quantile().domain([3, 6, 7, 8, 8, 10, 13, 15, 16, 20]);;
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assert.deepEqual(x.range([0, 1, 2, 3]).quantiles(), [7.25, 9, 14.5]);
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assert.deepEqual(x.range([0, 1]).quantiles(), [9]);
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assert.deepEqual(x.range([,,,,,]).quantiles(), [6.8, 8, 11.2, 15.2]);
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assert.deepEqual(x.range([,,,,,,]).quantiles(), [6.5, 8, 9, 13, 15.5]);
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},
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"range values are arbitrary": function(quantile) {
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var a = new Object(), b = new Object(), c = new Object();
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var x = d3.scale.quantile().domain([3, 6, 7, 8, 8, 10, 13, 15, 16, 20]).range([a, b, c, a]);
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assert.deepEqual([3, 6, 6.9, 7, 7.1].map(x), [a, a, a, a, a]);
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assert.deepEqual([8, 8.9].map(x), [b, b]);
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assert.deepEqual([9, 9.1, 10, 13].map(x), [c, c, c, c]);
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assert.deepEqual([14.9, 15, 15.1, 16, 20].map(x), [a, a, a, a, a]);
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}
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}
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});
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suite.export(module);
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