Add test for infura controller.

test/unit/infura-controller-test.js

@@ -0,0 +1,34 @@
+// polyfill fetch
+global.fetch = global.fetch || require('isomorphic-fetch')
+
+const assert = require('assert')
+const nock = require('nock')
+const InfuraController = require('../../app/scripts/controllers/infura')
+
+describe('infura-controller', function () {
+  var infuraController
+
+  beforeEach(function () {
+    infuraController = new InfuraController()
+  })
+
+  describe('network status queries', function () {
+    describe('#checkInfuraNetworkStatus', function () {
+      it('should return an object reflecting the network statuses', function () {
+        this.timeout(15000)
+        nock('https://api.infura.io')
+          .get('/v1/status/metamask')
+          .reply(200, '{"mainnet": "ok", "ropsten": "degraded", "kovan": "down", "rinkeby": "ok"}')
+
+        infuraController.checkInfuraNetworkStatus()
+          .then(() => {
+            const networkStatus = infuraController.store.getState().infuraNetworkStatus
+            assert.equal(Object.keys(networkStatus).length, 4)
+            assert.equal(networkStatus.mainnet, 'ok')
+            assert.equal(networkStatus.ropsten, 'degraded')
+            assert.equal(networkStatus.kovan, 'down')
+          })
+      })
+    })
+  })
+})