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render_grid.test.js
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"use strict";
var mapnik = require('../');
var assert = require('assert');
var path = require('path');
var fs = require('fs');
var stylesheet = './test/stylesheet.xml';
var reference = './test/support/grid2.json';
var reference_view = './test/support/grid_view.json';
var reference__id__ = './test/support/grid__id__.json';
var reference__id__2 = './test/support/grid__id__2.json';
var reference__id__3 = './test/support/grid__id__3.json';
function _c(grid1,grid2) {
return grid2.replace(/\r/g, '') == grid2.replace(/\r/g, '');
}
if (mapnik.supports.grid) {
mapnik.register_datasource(path.join(mapnik.settings.paths.input_plugins,'shape.input'));
describe('mapnik grid rendering ', function() {
it('should match expected output (sync rendering)', function(done) {
var map = new mapnik.Map(256, 256);
map.loadSync(stylesheet, {strict: true});
map.zoomAll();
var grid = new mapnik.Grid(map.width, map.height, {key: '__id__'});
var options = {'layer': 0,
'fields': ['NAME', 'LAT', 'LON', 'AREA', 'ISO2', 'ISO3', 'FIPS']
};
map.render(grid, options, function(err, grid) {
if (err) throw err;
var grid_utf = grid.encodeSync({resolution: 4, features:true});
// pull an identical view and compare it to original grid
var gv = grid.view(0, 0, 256, 256);
var gv_utf = gv.encodeSync({resolution: 4, features:true});
if (process.env.UPDATE) {
fs.writeFileSync(reference,JSON.stringify(grid_utf,null,1));
} else {
var expected = fs.readFileSync(reference,'utf8');
var equal = _c(JSON.stringify(grid_utf,null,1),expected);
assert.ok(equal);
equal = _c(JSON.stringify(gv_utf,null,1),expected);
assert.ok(equal);
}
// pull a subsetted view (greenland basically)
var gv2 = grid.view(64, 64, 64, 64);
assert.equal(gv2.width(), 64);
assert.equal(gv2.height(), 64);
var gv_utf2 = gv2.encodeSync({resolution: 4});
var expected_view = fs.readFileSync(reference_view,'utf8');
if (process.env.UPDATE) {
fs.writeFileSync(reference_view,JSON.stringify(gv_utf2,null,1));
} else {
assert.ok(_c(JSON.stringify(gv_utf2,null,1),expected_view));
}
done();
});
});
it('should match expected output (async rendering)', function(done) {
var map = new mapnik.Map(256, 256);
map.load(stylesheet, {strict: true}, function(err,map) {
if (err) throw err;
map.zoomAll();
var grid = new mapnik.Grid(map.width, map.height, {key: '__id__'});
var options = {'layer': 0,
'fields': ['NAME']
};
map.render(grid, options, function(err, grid) {
if (err) throw err;
grid.encode({resolution: 4}, function(err,utf) {
var equal = _c(JSON.stringify(utf,null,1),fs.readFileSync(reference,'utf8'));
assert.ok(equal);
done();
});
});
});
});
it('should match expected output (async rendering view)', function(done) {
var map = new mapnik.Map(256, 256);
map.load(stylesheet, {strict: true}, function(err,map) {
if (err) throw err;
map.zoomAll();
var grid = new mapnik.Grid(map.width, map.height, {key: '__id__'});
var options = {'layer': 0,
'fields': ['NAME']
};
map.render(grid, options, function(err, grid) {
assert.ok(!err);
var gv = grid.view(0, 0, 256, 256);
gv.encode({resolution: 4}, function(err,gv_utf1) {
var equal = _c(JSON.stringify(gv_utf1,null,1),fs.readFileSync(reference,'utf8'));
assert.ok(equal);
done();
});
});
});
});
it('should match expected output (async rendering view subsetted)', function(done) {
var map = new mapnik.Map(256, 256);
map.load(stylesheet, {strict: true}, function(err,map) {
if (err) throw err;
map.zoomAll();
var grid = new mapnik.Grid(map.width, map.height, {key: '__id__'});
var options = {'layer': 0,
'fields': ['NAME']
};
map.render(grid, options, function(err, grid) {
assert.ok(!err);
// pull a subsetted view (greenland basically)
var gv2 = grid.view(64, 64, 64, 64);
assert.equal(gv2.width(), 64);
assert.equal(gv2.height(), 64);
gv2.encode({resolution: 4}, function(err,gv_utf2) {
if (process.env.UPDATE) {
fs.writeFileSync(reference_view,JSON.stringify(gv_utf2,null,1));
} else {
var equal = _c(JSON.stringify(gv_utf2,null,1),fs.readFileSync(reference_view,'utf8'));
assert.ok(equal);
}
done();
});
});
});
});
it('should match expected output if __id__ is not the grid key', function(done) {
var map = new mapnik.Map(256, 256);
map.loadSync(stylesheet, {strict: true});
map.zoomAll();
var grid = new mapnik.Grid(map.width, map.height, {key: 'NAME'});
var options = {'layer': 0,
'fields': ['FIPS','__id__']
};
map.render(grid, options, function(err, grid) {
if (err) throw err;
var grid_utf = grid.encodeSync({resolution: 4});
if (process.env.UPDATE) {
fs.writeFileSync(reference__id__,JSON.stringify(grid_utf,null,1));
} else {
var equal = _c(JSON.stringify(grid_utf,null,1),fs.readFileSync(reference__id__,'utf8'));
assert.ok(equal);
}
done();
});
});
it('should match expected output if __id__ both the grid key and in the attributes with others', function(done) {
var map = new mapnik.Map(256, 256);
map.loadSync(stylesheet, {strict: true});
map.zoomAll();
var grid = new mapnik.Grid(map.width, map.height, {key: '__id__'});
var options = {'layer': 0,
'fields': ['__id__','NAME']
};
map.render(grid, options, function(err, grid) {
if (err) throw err;
var grid_utf = grid.encodeSync({resolution: 4});
if (process.env.UPDATE) {
fs.writeFileSync(reference__id__2,JSON.stringify(grid_utf,null,1));
} else {
var equal = _c(JSON.stringify(grid_utf,null,1),fs.readFileSync(reference__id__2,'utf8'));
assert.ok(equal);
}
done();
});
});
it('should match expected output if __id__ the grid key and the only attributes', function(done) {
var map = new mapnik.Map(256, 256);
map.loadSync(stylesheet, {strict: true});
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 = map.srs;
l.datasource = mem_datasource;
map.add_layer(l);
map.zoomAll();
var grid = new mapnik.Grid(map.width, map.height, {key: '__id__'});
var options = {'layer': 'world',
'fields': ['__id__'],
variables: {pizza:'pie'}
};
map.render(grid, options, function(err, grid) {
if (err) throw err;
var grid_utf = grid.encodeSync({resolution: 4});
if (process.env.UPDATE) {
fs.writeFileSync(reference__id__3,JSON.stringify(grid_utf,null,1));
} else {
var equal = _c(JSON.stringify(grid_utf,null,1),fs.readFileSync(reference__id__3,'utf8'));
assert.ok(equal);
}
done();
});
});
it('should fail to render two things at once', function() {
var map = new mapnik.Map(256, 256);
map.loadSync(stylesheet, {strict: true});
map.zoomAll();
var grid = new mapnik.Grid(map.width, map.height, {key: '__id__'});
var options = {'layer': 0,
'fields': ['__id__','NAME']
};
assert.throws(function() {
map.render(grid, options, function(err, result) {});
map.render(grid, options, function(err, result) {});
});
});
it('should fail to render grid', function(done) {
var map = new mapnik.Map(256, 256);
var map2 = new mapnik.Map(256, 256);
map.loadSync(stylesheet, {strict: true});
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 = map.srs;
l.datasource = mem_datasource;
map.add_layer(l);
map.zoomAll();
map.srs = '+init=PIZZA';
var grid = new mapnik.Grid(map.width, map.height, {key: '__id__'});
// Requires options layer
assert.throws(function() { map.render(grid, {}, function(err, result) {}); });
assert.throws(function() { map.render(grid, {layer:null}, function(err, result) {}); });
assert.throws(function() { map.render(grid, {layer:'foo'}, function(err, result) {}); });
assert.throws(function() { map.render(grid, {layer:99}, function(err, result) {}); });
assert.throws(function() { map2.render(grid, {layer:0}, function(err, result) {}); });
assert.throws(function() { map.render(grid, {layer:0, fields:null}, function(err, result) {}); });
assert.throws(function() { map.render(grid, {layer:0, variables:null}, function(err, result) {}); });
map.render(grid, {layer:0}, function(err, result) {
assert.throws(function() { if(err) throw err; });
done();
});
});
});
}