API returned extra features I didn't specify in tfconfig for azurerm_signalr_service

[neil-yechenwei]

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Terraform (and AzureRM Provider) Version

Terraform v0.12.24

• provider.azurerm (2.18.0)

Affected Resource(s)

• azurerm_signalr_service

Terraform Configuration Files

provider "azurerm" {
  features {}
}

resource "azurerm_resource_group" "test" {
  name     = "acctestRG-ss-test01"
  location = "eastus2"
}

resource "azurerm_signalr_service" "test" {
  name                = "acctestSignalR-test01"
  location            = azurerm_resource_group.test.location
  resource_group_name = azurerm_resource_group.test.name

  sku {
    name     = "Free_F1"
    capacity = 1
  }

  features {
    flag  = "ServiceMode"
    value = "Serverless"
  }
}

Panic Output

=== RUN   TestAccAzureRMSignalRService_serviceMode
=== PAUSE TestAccAzureRMSignalRService_serviceMode
=== CONT  TestAccAzureRMSignalRService_serviceMode
    TestAccAzureRMSignalRService_serviceMode: testing.go:684: Step 0 error: After applying this step, the plan was not empty:
        
        DIFF:
        
        UPDATE: azurerm_signalr_service.test
          cors.#:                      "1" => "1"
          cors.0.allowed_origins.#:    "1" => "1"
          cors.0.allowed_origins.0:    "*" => "*"
          features.#:                  "3" => "1"
          features.0.flag:             "ServiceMode" => "ServiceMode"
          features.0.value:            "Serverless" => "Serverless"
          features.1.flag:             "EnableConnectivityLogs" => ""
          features.1.value:            "False" => ""
          features.2.flag:             "EnableMessagingLogs" => ""
          features.2.value:            "False" => ""
          hostname:                    "xxx.service.signalr.net" => "xxx.service.signalr.net"
          id:                          "/subscriptions/xx-xx-xx-xx/resourceGroups/acctestRG-200710132141064566/providers/Microsoft.SignalRService/SignalR/xxx" => "/subscriptions/xx-xx-xx-xx/resourceGroups/acctestRG-200710132141064566/providers/Microsoft.SignalRService/SignalR/xxx"
          ip_address:                  "xxx" => "xxx"
          location:                    "eastus2" => "eastus2"
          name:                        "xxx" => "xxx"
          primary_access_key:          "xxx" => "xxx"
          primary_connection_string:   "Endpoint=https://xxx.service.signalr.net;AccessKey=xxx;Version=1.0;" => "Endpoint=https://xxx.service.signalr.net;AccessKey=xxxx;Version=1.0;"
          public_port:                 "443" => "443"
          resource_group_name:         "acctestRG-200710132141064566" => "acctestRG-200710132141064566"
          secondary_access_key:        "xxx" => "xxx"
          secondary_connection_string: "Endpoint=https://xxx.service.signalr.net;AccessKey=xxxx;Version=1.0;" => "Endpoint=https://xxx.service.signalr.net;AccessKey=xxxx;Version=1.0;"
          server_port:                 "443" => "443"
          sku.#:                       "1" => "1"
          sku.0.capacity:              "1" => "1"
          sku.0.name:                  "Free_F1" => "Free_F1"
        
        
        
        STATE:
        
        azurerm_resource_group.test:
          ID = /subscriptions/xx-xx-xx-xx/resourceGroups/acctestRG-200710132141064566
          provider = provider.azurerm
          location = eastus2
          name = acctestRG-200710132141064566
        azurerm_signalr_service.test:
          ID = /subscriptions/xx-xx-xx-xx/resourceGroups/acctestRG-200710132141064566/providers/Microsoft.SignalRService/SignalR/xxx
          provider = provider.azurerm
          cors.# = 1
          cors.0.allowed_origins.# = 1
          cors.0.allowed_origins.0 = *
          features.# = 3
          features.0.flag = ServiceMode
          features.0.value = Serverless
          features.1.flag = EnableConnectivityLogs
          features.1.value = False
          features.2.flag = EnableMessagingLogs
          features.2.value = False
          hostname = xxx.service.signalr.net
          ip_address = xxxx
          location = eastus2
          name = xxx
          primary_access_key = xxxx
          primary_connection_string = Endpoint=https://xxxx.service.signalr.net;AccessKey=xxx;Version=1.0;
          public_port = 443
          resource_group_name = acctestRG-200710132141064566
          secondary_access_key = xxxx
          secondary_connection_string = Endpoint=https://xxxx.service.signalr.net;AccessKey=xxx;Version=1.0;
          server_port = 443
          sku.# = 1
          sku.0.capacity = 1
          sku.0.name = Free_F1
        
          Dependencies:
            azurerm_resource_group.test
--- FAIL: TestAccAzureRMSignalRService_serviceMode (568.47s)
FAIL

Debugger finished with exit code 0

Expected Behavior

It should only returned one feature I specified in tfconfig.

Actual Behavior

API returned three features which includes I didn't specified in tfconfig.

Steps to Reproduce

1. terraform apply

Important Factoids

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