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grid.test.js
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"use strict";
var mapnik = require('../');
var assert = require('assert');
if (mapnik.supports.grid) {
describe('mapnik.Grid ', function() {
it('should throw with invalid usage', function() {
// no 'new' keyword
assert.throws(function() { mapnik.Grid(1, 1); });
// invalid args
assert.throws(function() { new mapnik.Grid(); });
assert.throws(function() { new mapnik.Grid(1); });
assert.throws(function() { new mapnik.Grid('foo'); });
assert.throws(function() { new mapnik.Grid('a', 'b', 'c'); });
assert.throws(function() { new mapnik.Grid(256,256,null); });
assert.throws(function() { new mapnik.Grid(256,256,{key:null}); });
});
it('should be initialized properly', function() {
var grid = new mapnik.Grid(256, 256);
assert.ok(grid instanceof mapnik.Grid);
assert.equal(grid.width(), 256);
assert.equal(grid.height(), 256);
var v = grid.view(0, 0, 256, 256);
assert.ok(v instanceof mapnik.GridView);
assert.equal(v.width(), 256);
assert.equal(v.height(), 256);
assert.equal(grid.encodeSync({features:true}).length, v.encodeSync().length);
});
it('should fail to encode properly', function() {
var grid = new mapnik.Grid(256, 256);
assert.throws(function() { grid.encodeSync("foo"); });
assert.throws(function() { grid.encode("foo"); });
assert.throws(function() { grid.encode("foo", function(err, result) {}); });
assert.throws(function() { grid.encodeSync({features:null}); });
assert.throws(function() { grid.encodeSync({resolution:null}); });
assert.throws(function() { grid.encodeSync({resolution:0}); });
assert.throws(function() { grid.encode({features:null}, function(err, result) {}); });
assert.throws(function() { grid.encode({resolution:null}, function(err, result) {}); });
assert.throws(function() { grid.encode({resolution:0}, function(err, result) {}); });
assert.throws(function() { grid.encode({resolution:4}, null); });
});
it('should encode properly', function(done) {
var grid = new mapnik.Grid(256, 256);
grid.encode({resolution:4, features:true}, function(err, result) {
if (err) throw err;
assert.ok(result);
done();
});
});
it('should not be painted after rendering', function(done) {
var grid_blank = new mapnik.Grid(4, 4);
assert.equal(grid_blank.painted(), false);
assert.equal(grid_blank.background, undefined);
var m = new mapnik.Map(4, 4);
var l = new mapnik.Layer('test');
m.add_layer(l);
m.render(grid_blank, {layer: 0},function(err,grid_blank) {
assert.equal(grid_blank.painted(), false);
// TODO - expose grid background
//assert.equal(grid_blank.background, undefined);
done();
});
});
it('should be have background applied after rendering', function(done) {
var grid_blank = new mapnik.Grid(4, 4);
var m = new mapnik.Map(4, 4);
var l = new mapnik.Layer('test');
m.add_layer(l);
m.background = new mapnik.Color('green');
m.render(grid_blank, {layer: 0},function(err,grid_blank2) {
assert.equal(grid_blank2.painted(), false);
// TODO - expose grid background
//assert.ok(grid_blank2.background);
done();
});
});
it('should be painted after rendering 2', function(done) {
var grid_blank3 = new mapnik.Grid(4, 4);
assert.equal(grid_blank3.painted(), false);
assert.equal(grid_blank3.background, undefined);
var m3 = new mapnik.Map(4, 4);
var s = '<Map>';
s += '<Style name="points">';
s += ' <Rule>';
s += ' <PointSymbolizer />';
s += ' </Rule>';
s += '</Style>';
s += '</Map>';
m3.fromStringSync(s);
var mem_datasource = new mapnik.MemoryDatasource({'extent': '-180,-90,180,90'});
mem_datasource.add({ 'x': 0, 'y': 0 });
mem_datasource.add({ 'x': 1, 'y': 1 });
mem_datasource.add({ 'x': 2, 'y': 2 });
mem_datasource.add({ 'x': 3, 'y': 3 });
var l = new mapnik.Layer('test');
l.srs = m3.srs;
l.styles = ['points'];
l.datasource = mem_datasource;
m3.add_layer(l);
m3.zoomAll();
m3.render(grid_blank3, {layer: 0},function(err,grid_blank3) {
assert.equal(grid_blank3.painted(), true);
// TODO - expose grid background
//assert.equal(grid_blank3.background,undefined);
grid_blank3.key = "stuff";
assert.throws(function() { grid_blank3.key = null; });
assert.throws(function() { grid_blank3.clear(null); });
grid_blank3.clear(function(err, grid_blank4) {
assert.equal(grid_blank4.key, "stuff");
assert.equal(grid_blank4.painted(), false);
done();
});
});
});
it('should be painted after rendering 3', function(done) {
var grid_blank3 = new mapnik.Grid(4, 4);
assert.equal(grid_blank3.painted(), false);
assert.equal(grid_blank3.background, undefined);
var m3 = new mapnik.Map(4, 4);
var s = '<Map>';
s += '<Style name="points">';
s += ' <Rule>';
s += ' <PointSymbolizer />';
s += ' </Rule>';
s += '</Style>';
s += '</Map>';
m3.fromStringSync(s);
var mem_datasource = new mapnik.MemoryDatasource({extent: '-180,-90,180,90', somefield:'value'});
mem_datasource.add({ 'x': 0, 'y': 0, properties: {feat_id:1,null_val:null,name:"name"}});
mem_datasource.add({ 'x': 1, 'y': 1 });
mem_datasource.add({ 'x': 2, 'y': 2 });
mem_datasource.add({ 'x': 3, 'y': 3 });
var l = new mapnik.Layer('test');
l.srs = m3.srs;
l.styles = ['points'];
l.datasource = mem_datasource;
m3.add_layer(l);
m3.zoomAll();
m3.render(grid_blank3, {layer: 0},function(err,grid_blank3) {
assert.equal(grid_blank3.painted(), true);
assert.throws(function() { grid_blank3.addField(null); });
assert.throws(function() { grid_blank3.addField(); });
grid_blank3.addField("foo");
assert.deepEqual(grid_blank3.fields(), ["foo"]);
// TODO - expose grid background
//assert.equal(grid_blank3.background,undefined);
grid_blank3.clear();
assert.equal(grid_blank3.painted(), false);
grid_blank3.clearSync();
assert.equal(grid_blank3.painted(), false);
done();
});
});
});
}