189 строки
9.4 KiB
JavaScript
189 строки
9.4 KiB
JavaScript
var vows = require("vows"),
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_ = require("../../"),
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load = require("../load"),
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assert = require("../assert");
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var suite = vows.describe("d3.geo.graticule");
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var ε = 1e-6;
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suite.addBatch({
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"graticule": {
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topic: load("geo/graticule").expression("d3.geo.graticule"),
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"extent": {
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"sets minorExtent and majorExtent": function(graticule) {
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var g = graticule().extent([[-90, -45], [90, 45]]);
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assert.deepEqual(g.minorExtent(), [[-90, -45], [90, 45]]);
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assert.deepEqual(g.majorExtent(), [[-90, -45], [90, 45]]);
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},
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"gets minorExtent": function(graticule) {
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var g = graticule().minorExtent([[-90, -45], [90, 45]]);
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assert.deepEqual(g.extent(), [[-90, -45], [90, 45]]);
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}
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},
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"majorExtent": {
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"default longitude ranges from 180°W (inclusive) to 180°E (exclusive)": function(graticule) {
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var extent = graticule().majorExtent();
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assert.equal(extent[0][0], -180);
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assert.equal(extent[1][0], +180);
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},
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"default latitude ranges from 90°S (exclusive) to 90°N (exclusive)": function(graticule) {
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var extent = graticule().majorExtent();
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assert.equal(extent[0][1], -90 + ε);
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assert.equal(extent[1][1], +90 - ε);
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},
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"coerces input values to numbers": function(graticule) {
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var g = graticule().majorExtent([["-90", "-45"], ["+90", "+45"]]),
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extent = g.majorExtent();
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assert.strictEqual(extent[0][0], -90);
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assert.strictEqual(extent[0][1], -45);
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assert.strictEqual(extent[1][0], +90);
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assert.strictEqual(extent[1][1], +45);
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}
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},
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"minorExtent": {
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"default longitude ranges from 180°W (inclusive) to 180°E (exclusive)": function(graticule) {
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var extent = graticule().minorExtent();
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assert.equal(extent[0][0], -180);
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assert.equal(extent[1][0], +180);
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},
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"default latitude ranges from 80°S (inclusive) to 80°N (inclusive)": function(graticule) {
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var extent = graticule().minorExtent();
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assert.equal(extent[0][1], -80 - ε);
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assert.equal(extent[1][1], +80 + ε);
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},
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"coerces input values to numbers": function(graticule) {
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var g = graticule().minorExtent([["-90", "-45"], ["+90", "+45"]]),
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extent = g.minorExtent();
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assert.strictEqual(extent[0][0], -90);
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assert.strictEqual(extent[0][1], -45);
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assert.strictEqual(extent[1][0], +90);
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assert.strictEqual(extent[1][1], +45);
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}
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},
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"step": {
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"sets minorStep and majorStep": function(graticule) {
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var g = graticule().step([22.5, 22.5]);
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assert.deepEqual(g.minorStep(), [22.5, 22.5]);
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assert.deepEqual(g.majorStep(), [22.5, 22.5]);
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},
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"gets minorStep": function(graticule) {
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var g = graticule().minorStep([22.5, 22.5]);
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assert.deepEqual(g.step(), [22.5, 22.5]);
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}
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},
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"minorStep": {
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"defaults to 10°, 10°": function(graticule) {
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assert.deepEqual(graticule().minorStep(), [10, 10]);
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},
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"coerces input values to numbers": function(graticule) {
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var g = graticule().minorStep(["45", "11.25"]),
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step = g.minorStep();
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assert.strictEqual(step[0], 45);
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assert.strictEqual(step[1], 11.25);
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}
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},
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"majorStep": {
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"defaults to 90°, 360°": function(graticule) {
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assert.deepEqual(graticule().majorStep(), [90, 360]);
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},
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"coerces input values to numbers": function(graticule) {
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var g = graticule().majorStep(["45", "11.25"]),
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step = g.majorStep();
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assert.strictEqual(step[0], 45);
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assert.strictEqual(step[1], 11.25);
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}
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},
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"lines": {
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"default longitude ranges from 180°W (inclusive) to 180°E (exclusive)": function(graticule) {
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var lines = graticule().lines()
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.filter(function(line) { return line.coordinates[0][0] === line.coordinates[1][0]; })
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.sort(function(a, b) { return a.coordinates[0][0] - b.coordinates[0][0]; });
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assert.equal(lines[0].coordinates[0][0], -180);
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assert.equal(lines[lines.length - 1].coordinates[0][0], +170);
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},
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"default latitude ranges from 90°S (exclusive) to 90°N (exclusive)": function(graticule) {
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var lines = graticule().lines()
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.filter(function(line) { return line.coordinates[0][1] === line.coordinates[1][1]; })
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.sort(function(a, b) { return a.coordinates[0][1] - b.coordinates[0][1]; });
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assert.equal(lines[0].coordinates[0][1], -80);
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assert.equal(lines[lines.length - 1].coordinates[0][1], +80);
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},
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"default minor longitude lines extend from 80°S to 80°N": function(graticule) {
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var lines = graticule().lines()
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.filter(function(line) { return line.coordinates[0][0] === line.coordinates[1][0]; })
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.filter(function(line) { return Math.abs(line.coordinates[0][0] % 90) > ε; });
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lines.forEach(function(line) {
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assert.deepEqual(_.extent(line.coordinates, function(p) { return p[1]; }), [-80 - ε, +80 + ε]);
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});
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},
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"default major longitude lines extend from 90°S to 90°N": function(graticule) {
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var lines = graticule().lines()
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.filter(function(line) { return line.coordinates[0][0] === line.coordinates[1][0]; })
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.filter(function(line) { return Math.abs(line.coordinates[0][0] % 90) < ε; });
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lines.forEach(function(line) {
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assert.deepEqual(_.extent(line.coordinates, function(p) { return p[1]; }), [-90 + ε, +90 - ε]);
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});
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},
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"default latitude lines extend from 180°W to 180°E": function(graticule) {
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var lines = graticule().lines()
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.filter(function(line) { return line.coordinates[0][1] === line.coordinates[1][1]; });
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lines.forEach(function(line) {
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assert.deepEqual(_.extent(line.coordinates, function(p) { return p[0]; }), [-180, +180]);
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});
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},
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"returns an array of LineStrings": function(graticule) {
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assert.deepEqual(graticule()
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.extent([[-90, -45], [90, 45]])
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.step([45, 45])
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.precision(3)
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.lines(), [
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{type: "LineString", coordinates: [[-90,-45],[-90,45]]}, // meridian
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{type: "LineString", coordinates: [[-45,-45],[-45,45]]}, // meridian
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{type: "LineString", coordinates: [[0,-45],[0,45]]}, // meridian
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{type: "LineString", coordinates: [[45,-45],[45,45]]}, // meridian
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{type: "LineString", coordinates: [[-90,-45],[-87,-45],[-84,-45],[-81,-45],[-78,-45],[-75,-45],[-72,-45],[-69,-45],[-66,-45],[-63,-45],[-60,-45],[-57,-45],[-54,-45],[-51,-45],[-48,-45],[-45,-45],[-42,-45],[-39,-45],[-36,-45],[-33,-45],[-30,-45],[-27,-45],[-24,-45],[-21,-45],[-18,-45],[-15,-45],[-12,-45],[-9,-45],[-6,-45],[-3,-45],[0,-45],[3,-45],[6,-45],[9,-45],[12,-45],[15,-45],[18,-45],[21,-45],[24,-45],[27,-45],[30,-45],[33,-45],[36,-45],[39,-45],[42,-45],[45,-45],[48,-45],[51,-45],[54,-45],[57,-45],[60,-45],[63,-45],[66,-45],[69,-45],[72,-45],[75,-45],[78,-45],[81,-45],[84,-45],[87,-45],[90,-45]]},
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{type: "LineString", coordinates: [[-90,0],[-87,0],[-84,0],[-81,0],[-78,0],[-75,0],[-72,0],[-69,0],[-66,0],[-63,0],[-60,0],[-57,0],[-54,0],[-51,0],[-48,0],[-45,0],[-42,0],[-39,0],[-36,0],[-33,0],[-30,0],[-27,0],[-24,0],[-21,0],[-18,0],[-15,0],[-12,0],[-9,0],[-6,0],[-3,0],[0,0],[3,0],[6,0],[9,0],[12,0],[15,0],[18,0],[21,0],[24,0],[27,0],[30,0],[33,0],[36,0],[39,0],[42,0],[45,0],[48,0],[51,0],[54,0],[57,0],[60,0],[63,0],[66,0],[69,0],[72,0],[75,0],[78,0],[81,0],[84,0],[87,0],[90,0]]}
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]);
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}
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},
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"returns a MultiLineString of all lines": function(graticule) {
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var g = graticule()
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.extent([[-90, -45], [90, 45]])
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.step([45, 45])
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.precision(3);
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assert.deepEqual(g(), {
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type: "MultiLineString",
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coordinates: g.lines().map(function(line) { return line.coordinates; })
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});
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},
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"outline": {
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"returns a Polygon encompassing the major extent": function(graticule) {
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assert.deepEqual(graticule()
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.majorExtent([[-90, -45], [90, 45]])
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.precision(3)
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.outline(), {
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type: "Polygon",
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coordinates: [[
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[-90,-45],[-90,45], // meridian
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[-87,45],[-84,45],[-81,45],[-78,45],[-75,45],[-72,45],[-69,45],[-66,45],[-63,45],[-60,45],[-57,45],[-54,45],[-51,45],[-48,45],[-45,45],[-42,45],[-39,45],[-36,45],[-33,45],[-30,45],[-27,45],[-24,45],[-21,45],[-18,45],[-15,45],[-12,45],[-9,45],[-6,45],[-3,45],[0,45],[3,45],[6,45],[9,45],[12,45],[15,45],[18,45],[21,45],[24,45],[27,45],[30,45],[33,45],[36,45],[39,45],[42,45],[45,45],[48,45],[51,45],[54,45],[57,45],[60,45],[63,45],[66,45],[69,45],[72,45],[75,45],[78,45],[81,45],[84,45],[87,45],
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[90,45],[90,-45], // meridian
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[87,-45],[84,-45],[81,-45],[78,-45],[75,-45],[72,-45],[69,-45],[66,-45],[63,-45],[60,-45],[57,-45],[54,-45],[51,-45],[48,-45],[45,-45],[42,-45],[39,-45],[36,-45],[33,-45],[30,-45],[27,-45],[24,-45],[21,-45],[18,-45],[15,-45],[12,-45],[9,-45],[6,-45],[3,-45],[0,-45],[-3,-45],[-6,-45],[-9,-45],[-12,-45],[-15,-45],[-18,-45],[-21,-45],[-24,-45],[-27,-45],[-30,-45],[-33,-45],[-36,-45],[-39,-45],[-42,-45],[-45,-45],[-48,-45],[-51,-45],[-54,-45],[-57,-45],[-60,-45],[-63,-45],[-66,-45],[-69,-45],[-72,-45],[-75,-45],[-78,-45],[-81,-45],[-84,-45],[-87,-45],[-90,-45]
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]]
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});
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}
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}
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}
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});
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suite.export(module);
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