Subscription is not working with Variables

[fredericbirke]

Describe the bug
Subscriptions will not work when using variables, because when creating subscriptions stream keys, the variables names are used to create the keys, instead of the actual value of the variable.

This results is, that subscriptions that use variables will never receive any messages, because their stream key is never matched.

To Reproduce
Check out this repo (It's a fresh dotnet core 3 project with hc 0.10):
https://github.com/Narmor/hc-subscription-bug

Start the project, open Playground on http://localhost:5000/playground, create 4 editor-tabs and put the following snippets in one tab each:

first editor-tab

subscription {
  onReview(moviewName: "DieHard")
}

second editor-tab

subscription onReviewSub($movieName: String) {
  onReview(moviewName: $movieName)
}

with Variables:

{
  "movieName": "DieHard"
}

third editor-tab

mutation {
  fireSubscriptionEvent(moviewName: "DieHard")
}

fourth editor-tab

mutation fireEvent($movieName: String){
  fireSubscriptionEvent(moviewName: $movieName)
}

with Variables:

{
  "movieName": "DieHard"
}

Start both Subscriptions in the first two editor editor-tabs.
Then fire both mutations in the other two editor-tabs.

Expected behavior
Both open subscriptions will receive exactly the same two values.

[michaelstaib]

Thanks for filing this issue. I will look into it once I am back from Kiev.

[michaelstaib]

I can proof now that this is a bug. We will issue a fix for this today.

[michaelstaib]

This one is fixed with 10.2.0-rc.1

[michaelstaib]

This issue seems to be back in the 11 branch. I reopened this so we have a trigger to revalidate this.