Azure Function support for Event Grid event subscription

[jrauschenbusch]

Fixes #7176

Adds Azure Function support to azurerm_eventgrid_event_subscription resource.

[tombuildsstuff]

hey @jrauschenbusch

Thanks for this PR :)

Taking a look through this is looking good - if we can can fix up the comments (and add an acceptance test) then we should be able to kick off the tests and get this merged 👍

Thanks!

[tombuildsstuff]

could we add an acceptance test covering this new block?

[jrauschenbusch]

I would really like to do an acceptance test for it. Unfortunately, it's pretty much the same as the webhook endpoint, which is also hard to test. You would first have to be able to deploy a function with an input binding of type eventGridBinding out of Terraform. But that is currently not possible as there is no terraform resource for it. It is only possible to deploy a function app, which hosts multiple functions inside.

I started with an implementation of an azurerm_function resource to also be able to write acceptance tests for the function and webhook endpoints of the eventgrid_event_subscription, but it's not that easy to find a good schema design for it.

[jrauschenbusch]

@tombuildsstuff Changed everything except the missing acc test. Maybe i can add it by introducing another resource azurerm_function which would allow us to create acceptance tests for the webhook and azure function endpoint setups.

[tombuildsstuff]

hey @jrauschenbusch

Thanks for pushing those changes - taking a look through this now LGTM 👍

Thanks!

[tombuildsstuff]

Tests pass:

[ghost]

This has been released in version 2.14.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 2.14.0"
}
# ... other configuration ...

[ghost]

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