spec: Split the session.protocol test into multiple tests

spec/api-session-spec.js

@@ -295,17 +295,21 @@ describe('session module', function () {
       partitionProtocol.unregisterProtocol(protocolName, () => done())
     })
 
-    it('handles requests from a partition', function (done) {
+    it('does not affect defaultSession', function (done) {
       protocol.isProtocolHandled(protocolName, function (result) {
         assert.equal(result, false)
         partitionProtocol.isProtocolHandled(protocolName, function (result) {
           assert.equal(result, true)
+          done()
+        })
+      })
+    })
+
+    it('handles requests from partition', function (done) {
       w.webContents.on('did-finish-load', function () {
         done()
       })
-          w.loadURL(protocolName + "://fake-host")
+      w.loadURL(`${protocolName}://fake-host`)
-        })
-      })
     })
   })
 })