tasks: hard code mapbox access token in constants.js

- no need to hide mapbox access tokens (there are public)
- remove `export MAPBOX_ACCESS_TOKEN` step in contributing guide

Author: etpinard

CONTRIBUTING.md

@@ -38,26 +38,21 @@ We use the following [labels](https://github.com/plotly/plotly.js/labels) to tra
 
 #### Step 1: Clone the plotly.js repo and install its dependencies
 
-```
+```bash
 git clone https://github.com/plotly/plotly.js.git
 cd plotly.js
 npm install
 ```
 
-#### Step 2: Setup Mapbox access token
-
-As of `v1.13.0`, plotly.js includes a [`mapbox-gl`](https://github.com/mapbox/mapbox-gl-js) integration. Creating `mapbox-gl` graphs requires an
-[`accessToken`](https://www.mapbox.com/help/define-access-token/). To make sure
-that the plotly.js test suites and devtools work properly, locate your Mapbox access
-token and run:
+#### Step 2: Setup test environment
 
 ```bash
-export MAPBOX_ACCESS_TOKEN="<your access token>" && npm run pretest
+npm run pretest
 ```
 
 #### Step 3: Start the test dashboard
 
-```
+```bash
 npm start
 ```
 

tasks/pretest.js

@@ -1,14 +1,7 @@
 var fs = require('fs');
 var constants = require('./util/constants');
-var mapboxAccessToken = process.env.MAPBOX_ACCESS_TOKEN;
 
 
-if(!mapboxAccessToken) {
-    throw new Error([
-        'MAPBOX_ACCESS_TOKEN not found!!!',
-        'Please export your mapbox access token into and try again.'
-    ].join('\n'));
-}
 
 // Create a credentials json file,
 // to be required in jasmine test suites and test dashboard

tasks/util/constants.js

@@ -67,6 +67,7 @@ module.exports = {
     pathToJasmineTests: path.join(pathToRoot, 'test/jasmine/tests'),
     pathToJasmineBundleTests: path.join(pathToRoot, 'test/jasmine/bundle_tests'),
 
+    mapboxAccessToken: 'pk.eyJ1IjoiZXRwaW5hcmQiLCJhIjoiY2luMHIzdHE0MGFxNXVubTRxczZ2YmUxaCJ9.hwWZful0U2CQxit4ItNsiQ',
     pathToCredentials: path.join(pathToBuild, 'credentials.json'),
     pathToSetPlotConfig: path.join(pathToBuild, 'set_plot_config.js'),