Add polyfill for WebSocket (node) (#31)

packages/api-format/package.json

@@ -33,7 +33,7 @@
     "@polkadot/api-jsonrpc": "^0.5.11"
   },
   "dependencies": {
-    "@polkadot/util": "^0.6.6",
+    "@polkadot/util": "^0.6.7",
     "babel-runtime": "^6.26.0"
   }
 }

packages/api-provider/package.json

@@ -34,8 +34,9 @@
     "nock": "^9.1.0"
   },
   "dependencies": {
-    "@polkadot/util": "^0.6.6",
+    "@polkadot/util": "^0.6.7",
     "babel-runtime": "^6.26.0",
-    "isomorphic-fetch": "^2.2.1"
+    "isomorphic-fetch": "^2.2.1",
+    "ws": "^3.3.2"
   }
 }

packages/api-provider/src/ws/index.js

@@ -11,6 +11,8 @@ type WsMessageType = {
   data: any
 };
 
+require('./polyfill');
+
 const JsonRpcCoder = require('../jsonRpcCoder');
 
 module.exports = class WsProvider extends JsonRpcCoder implements ProviderInterface {

packages/api-provider/src/ws/polyfill.js

@@ -0,0 +1,6 @@
+// ISC, Copyright 2017 Jaco Greeff
+// @flow
+
+if (typeof WebSocket === 'undefined') {
+  global.WebSocket = require('ws');
+}

packages/api-provider/src/ws/polyfill.spec.js

@@ -0,0 +1,24 @@
+// ISC, Copyright 2017 Jaco Greeff
+
+describe('ws/polyfill', () => {
+  let origWs;
+
+  beforeEach(() => {
+    origWs = global.WebSocket;
+    global.fetch = null;
+  });
+
+  afterEach(() => {
+    global.WebSocket = origWs;
+  });
+
+  it('polyfills with no exceptions (without WebSocket)', () => {
+    expect(require('./polyfill')).toBeDefined();
+  });
+
+  it('polyfills with no exceptions (with WebSocket)', () => {
+    global.WebSocket = () => true;
+
+    expect(require('./polyfill')).toBeDefined();
+  });
+});

packages/api/package.json

@@ -33,7 +33,7 @@
     "@polkadot/api-format": "^0.5.11",
     "@polkadot/api-jsonrpc": "^0.5.11",
     "@polkadot/api-provider": "^0.5.11",
-    "@polkadot/util": "^0.6.6",
+    "@polkadot/util": "^0.6.7",
     "babel-runtime": "^6.26.0"
   }
 }