Add GeoJSON test fixture

package.json

@@ -45,6 +45,6 @@
     "package-preamble": "0.1",
     "rollup": "0.49",
     "tape": "4",
-    "uglify-js": "32"
+    "uglify-js": "*"
   }
 }

test/geo-voronoi-test.js

@@ -1,5 +1,7 @@
-var tape = require("tape"),
-    geoVoronoi = require("../");
+var fs = require('fs');
+var path = require('path');
+var tape = require("tape");
+var geoVoronoi = require("../");
 
 tape("geoVoronoi() returns a Diagram.", function(test) {
   test.equal(typeof geoVoronoi, 'object');
@@ -43,3 +45,15 @@ tape("geoVoronoi.triangles(sites) returns circumcenters.", function(test) {
   test.ok( (Math.abs(u[0]-v[0]) < 1e-6) && (Math.abs(u[1]-v[1]) < 1e-6) );
   test.end();
 });
+
+tape('geoVoronoi.polygons(points) saves geojson', function(test) {
+  var points = require('./in/points')
+  var result = geoVoronoi.geoVoronoi().polygons(points)
+
+  // Save result to GeoJSON
+  result.features = result.features.concat(points.features)
+  var out = path.join(__dirname, 'out', 'points.json')
+  if (process.env.REGEN) fs.writeFileSync(out, JSON.stringify(result, null, 2))
+  test.deepEqual(JSON.parse(fs.readFileSync(out)), result)
+  test.end();
+});

test/in/points.json

@@ -0,0 +1,105 @@
+{
+  "type": "FeatureCollection",
+  "bbox": [143, -38, 146, -35],
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Point",
+        "coordinates": [
+          144.33837890625,
+          -37.14280344371683
+        ]
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Point",
+        "coordinates": [
+          144.931640625,
+          -37.35269280367274
+        ]
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Point",
+        "coordinates": [
+          145.140380859375,
+          -36.456636011596196
+        ]
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Point",
+        "coordinates": [
+          145.469970703125,
+          -36.77409249464194
+        ]
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Point",
+        "coordinates": [
+          145.755615234375,
+          -37.090239803072066
+        ]
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Point",
+        "coordinates": [
+          145.4150390625,
+          -37.52715361723378
+        ]
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Point",
+        "coordinates": [
+          145.887451171875,
+          -37.483576550426996
+        ]
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Point",
+        "coordinates": [
+          144.60205078125,
+          -36.57142382346275
+        ]
+      }
+    },
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Point",
+        "coordinates": [
+          144.86572265625,
+          -37.596824001083654
+        ]
+      }
+    }
+  ]
+}