Add Parameter Validation Tests

Tests/Public/Get-ZAAlert.Tests.ps1

@@ -6,6 +6,47 @@ Describe $global:function -Tag 'Unit', 'Source', 'Built' {
 
     Context "$global:function::Parameter Unit Tests" {
 
+        it "$global:function should have exactly 14 parameters defined" {
+            (get-command $global:function).Parameters.Count | Should -Be 14
+        }
+
+        $ParameterTestCases = @(
+            @{ParameterName = 'zOrgIdentifier'; Type = 'String'; Mandatory = $false; Validation = 'NotNullOrEmpty' }
+            @{ParameterName = 'limitTo'; Type = 'int'; Mandatory = $false; Validation = 'Range' }
+            @{ParameterName = 'alertIdentifier'; Type = 'String'; Mandatory = $true; Validation = 'NotNullOrEmpty' }
+        )
+
+        It "<ParameterName> parameter is of <Type> type" -TestCases $ParameterTestCases {
+            param($ParameterName, $Type, $Mandatory, $Validation)
+            Get-Command $global:function | Should -HaveParameter $ParameterName -Mandatory:$Mandatory -Type $Type
+        }
+
+        It "<ParameterName> parameter has correct validation setting"  -TestCases $ParameterTestCases {
+            param($ParameterName, $Validation)
+            Switch ($Validation) {
+                'NotNullOrEmpty' {
+                    $attrs = (Get-Command $global:function).Parameters[$ParameterName].Attributes
+                    $attrs.Where{ $_ -is [ValidateNotNullOrEmpty] }.Count | Should -Be 1
+                }
+
+                'Range' {
+                    $attrs = (Get-Command $global:function).Parameters[$ParameterName].Attributes
+                    $attrs.Where{ $_ -is [ValidateRange] }.Count | Should -Be 1
+                }
+
+                default {
+                    $true | should be $false -Because "No Validation Selected. Review test cases"
+                }
+            }
+        }
+
+        It "LimitTo Parameter should have a Min value of 1" {
+            (Get-Command $global:function).Parameters['limitTo'].Attributes.Where{ $_ -is [ValidateRange] }.MinRange | Should Be 1
+        }
+
+        It "LimitTo Parameter should have a Max value of 1000000" {
+            (Get-Command $global:function).Parameters['limitTo'].Attributes.Where{ $_ -is [ValidateRange] }.MaxRange | Should Be 1000000
+        }
     }
 
     Context "$global:function::Parameter Functional Tests" {