56 строки
1.8 KiB
JavaScript
56 строки
1.8 KiB
JavaScript
require("../env");
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var vows = require("vows"),
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assert = require("assert");
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var suite = vows.describe("d3.geo.albers");
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suite.addBatch({
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"albers": {
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topic: function() {
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return d3.geo.albers();
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},
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"Arctic": function(albers) {
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var coords = albers([0, 85]);
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assert.inDelta(coords[0], 1031.393796, 1e-6);
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assert.inDelta(coords[1], -714.160436, 1e-6);
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var lonlat = albers.invert(coords);
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assert.inDelta(lonlat[0], 0, 1e-6);
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assert.inDelta(lonlat[1], 85, 1e-6);
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},
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"Antarctic": function(albers) {
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var coords = albers([0, -85]);
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assert.inDelta(coords[0], 2753.458335, 1e-6);
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assert.inDelta(coords[1], 317.371122, 1e-6);
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var lonlat = albers.invert(coords);
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assert.inDelta(lonlat[0], 0, 1e-6);
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assert.inDelta(lonlat[1], -85, 1e-6);
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},
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"Hawaii": function(albers) {
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var coords = albers([-180, 0]);
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assert.inDelta(coords[0], -984.779405, 1e-6);
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assert.inDelta(coords[1], 209.571197, 1e-6);
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var lonlat = albers.invert(coords);
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assert.inDelta(lonlat[0], -180, 1e-6);
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assert.inDelta(lonlat[1], 0, 1e-6);
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},
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"Phillipines": function(albers) {
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var coords = albers([180, 0]);
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assert.inDelta(coords[0], 894.435228, 1e-6);
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assert.inDelta(coords[1], -2927.636630, 1e-6);
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var lonlat = albers.invert(coords);
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assert.inDelta(lonlat[0], 180, 1e-6);
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assert.inDelta(lonlat[1], 0, 1e-6);
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},
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"Inversion works for non-zero translation": function() {
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var albers = d3.geo.albers().translate([123, 99]).scale(100),
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coords = albers([0, 85]),
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lonlat = albers.invert(coords);
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assert.inDelta(lonlat[0], 0, 1e-6);
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assert.inDelta(lonlat[1], 85, 1e-6);
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}
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}
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});
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suite.export(module);
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