Increment a variable based on number of items in Powershell - powershell

Question

I am relatively new to PS, but using PS within a wider IaC workflow. I have the following script, which checks for number of services installed, and increments the port number variable by 1.
$Service = Get-Service Test* | Select-Object Name
If( $Service.Name.count -eq 0){
$port = 12000 }
If( $Service.Name.count -eq 1){
$port = 12001 }
If ( $Service.Name.Count -eq 2){
$port = 12002 }
If ( $Service.Name.Count -eq 3){
$port = 12003 }
Unfortunately, this is not as dynamic as I would like, as the script will fail if there is more than 3 services.
How can I dynamically increment the port number based on number of services that exist? The port number starts at 12000, then if another service is installed, the port will be 12001, and if a third service is detected, the port number is 12002 and so on.

Answer 1

You can follow the advice in comment by AdminOfThings if you ensure that the $Service object is a collection:
$Service = #(Get-Service Test* | Select-Object Name)
$port = 12000 + $Service.Count
Otherwise, you encounter the following errors:
$Service = Get-Service Test* ; $Service; $Service.Count
The property 'Count' cannot be found on this object. Verify that the property exists.
At line:1 char:42
+ $Service = Get-Service Test* ; $Service; $Service.Count
+ ~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], PropertyNotFoundException
+ FullyQualifiedErrorId : PropertyNotFoundStrict
$Service = Get-Service Te* ; $Service; $Service.Count
Status Name DisplayName
------ ---- -----------
Running TermService Remote Desktop Services
The property 'Count' cannot be found on this object. Verify that the property exists.
At line:1 char:40
+ $Service = Get-Service Te* ; $Service; $Service.Count
+ ~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], PropertyNotFoundException
+ FullyQualifiedErrorId : PropertyNotFoundStrict