Update to use Squirrel.Mac that supports CDN releases

spec/api-auto-updater-spec.js

@@ -30,7 +30,45 @@ describe('autoUpdater module', function () {
   })
 
   describe('setFeedURL', function () {
+    describe('on Mac or Windows', () => {
+      const noThrow = (fn) => {
+        try { fn() } catch (err) {}
+      }
+
+      before(function () {
+        if (process.platform !== 'win32' && process.platform !== 'darwin') {
+          this.skip()
+        }
+      })
+
+      it('sets url successfully using old (url, headers) syntax', () => {
+        noThrow(() => autoUpdater.setFeedURL('http://electronjs.org', { header: 'val' }))
+        assert.equal(autoUpdater.getFeedURL(), 'http://electronjs.org')
+      })
+
+      it('throws if no url is provided when using the old style', () => {
+        assert.throws(
+          () => autoUpdater.setFeedURL(),
+          err => err.message.includes('Expected an options object with a \'url\' property to be provided') // eslint-disable-line
+        )
+      })
+
+      it('sets url successfully using new ({ url }) syntax', () => {
+        noThrow(() => autoUpdater.setFeedURL({ url: 'http://mymagicurl.local' }))
+        assert.equal(autoUpdater.getFeedURL(), 'http://mymagicurl.local')
+      })
+
+      it('throws if no url is provided when using the new style', () => {
+        assert.throws(
+          () => autoUpdater.setFeedURL({ noUrl: 'lol' }),
+          err => err.message.includes('Expected options object to contain a \'url\' string property in setFeedUrl call') // eslint-disable-line
+        )
+      })
+    })
+
     describe('on Mac', function () {
+      const isServerTypeError = (err) => err.message.includes('Expected serverType to be \'default\' or \'json\'')
+
       before(function () {
         if (process.platform !== 'darwin') {
           this.skip()
@@ -44,6 +82,27 @@ describe('autoUpdater module', function () {
         })
         autoUpdater.setFeedURL('')
       })
+
+      it('does not throw if default is the serverType', () => {
+        assert.doesNotThrow(
+          () => autoUpdater.setFeedURL({ url: '', serverType: 'default' }),
+          isServerTypeError
+        )
+      })
+
+      it('does not throw if json is the serverType', () => {
+        assert.doesNotThrow(
+          () => autoUpdater.setFeedURL({ url: '', serverType: 'default' }),
+          isServerTypeError
+        )
+      })
+
+      it('does throw if an unknown string is the serverType', () => {
+        assert.throws(
+          () => autoUpdater.setFeedURL({ url: '', serverType: 'weow' }),
+          isServerTypeError
+        )
+      })
     })
   })