Further Unit Testing Improvements.

Author: RandomNoun7

source/DSCResources/DSC_xServiceResource/DSC_xServiceResource.psm1

@@ -628,12 +628,10 @@ function Test-TargetResource
         New-InvalidArgumentException -ArgumentName 'BuiltInAccount / Credential / GroupManagedServiceAccount' -Message $errorMessage
     }
 
-    if(($PSBoundParameters.ContainsKey('Failure3Action') -and (-not $PSBoundParameters.ContainsKey('Failure2Action'))) -or
-       ($PSBoundParameters.ContainsKey('Failure2Action') -and (-not $PSBoundParameters.ContainsKey('Failure1Action')))
-    )
+    if ($PSBoundParameters.ContainsKey('FailureCommand') -and (-not (Test-HasRestartFailureAction -Collection $FailureActionsCollection)))
     {
-        $errorMessage = $script:localizedData.FailureActionsMustBeSpecifiedInOrder
-        New-InvalidArgumentException -ArgumentName 'Failure2Action / Failure3Action' -Message $errorMessage
+        $errorMessage = $script:localizedData.MustSpecifyRestartFailureAction
+        New-InvalidArgumentException -ArgumentName 'FailureCommand' -Message $errorMessage
     }
 
     $serviceResource = Get-TargetResource -Name $Name
@@ -2458,3 +2456,25 @@ function Set-ServiceFailureActionProperty {
         }
     }
 }
+
+function Test-HasRestartFailureAction
+    {
+        [CmdletBinding()]
+        param (
+            [Parameter()]
+            [System.Object[]]
+            $Collection
+        )
+
+        process {
+            $hasRestartAction = $false
+
+            foreach ($action in $collection) {
+                if ($action.type -eq 'RUN_COMMAND') {
+                    $hasRestartAction = $true
+                }
+            }
+
+            $hasRestartAction
+        }
+    }

source/DSCResources/DSC_xServiceResource/en-US/DSC_xServiceResource.strings.psd1

@@ -37,5 +37,5 @@ ConvertFrom-StringData @'
     CannotGetAccountAccessErrorMessage = Failed to get user policy rights.
     CannotSetAccountAccessErrorMessage = Failed to set user policy rights.
     CorruptDependency = Service '{0}' has a corrupt dependency. For more information, inspect the registry value at HKLM:\\SYSTEM\\CurrentControlSet\\Services\\{0}\\DependOnService.
-    FailureActionsMustBeSpecifiedInOrder = Failure actions must be specified in order from 1 to 3.
+    MustSpecifyRestartFailureAction = A failure command can only be specified if one of the failure actions is 'RUN_COMMAND'
 '@