add test to check that labels are wrapped

test/acceptance/label-wrap.js

@@ -0,0 +1,69 @@
+require('../support/test_helper');
+var TestClient = require('../support/test-client');
+
+var assert = require('../support/assert');
+var IMAGE_TOLERANCE = 20;
+
+describe('CartoCSS wrap', function () {
+    const options = {
+        sql: `
+            SELECT 
+                5 as cartodb_id, 
+                ST_Transform(ST_SetSRID(ST_MakePoint(-57.65625,-15.6230368),4326),3857) as the_geom_webmercator,  
+                ST_SetSRID(ST_MakePoint(-57.65625,-15.62303683),4326) as the_geom, 
+                'South America' as continent
+        `,
+        cartocss: `
+            #continent_points::labels {
+                text-name: [continent];
+                text-face-name: 'Open Sans Italic';
+                text-size: 10;
+                text-fill: lighten(#000,40);
+                text-transform: uppercase;
+                text-wrap-width: 30;
+                text-character-spacing: 2;
+                text-placement: point;
+                text-placement-type: dummy;
+                [zoom >= 3]{
+                    text-character-spacing: 2;
+                    text-size: 11;
+                }
+            }
+        `,
+        cartocss_version: '3.0.12'
+    };
+
+    const type = 'mapnik';
+
+    const mapConfig = {
+        version: '1.6.0',
+        layers: [
+            {
+                type,
+                id: 'layerLabel',
+                options
+            }
+        ]
+    };
+
+
+    var keysToDelete;
+
+    beforeEach(function () {
+        keysToDelete = {};
+    });
+
+    afterEach(function (done) {
+        if (this.testClient) {
+            this.testClient.drain(done);
+        }
+    });
+
+    it.only("Label should be text-wrapped", function (done) {
+        this.testClient = new TestClient(mapConfig);
+        this.testClient.getTile(1, 0, 1, { layers: [0] }, (err, res, body) => {
+            var textWrapPath = './test/fixtures/text_wrap.png';
+            assert.imageIsSimilarToFile(body, textWrapPath, IMAGE_TOLERANCE, done);
+        });
+    });
+});