Add parameter validation functions and enhance tests for configuration data

.tests/Resolve-DSCConfigurationData.Tests.ps1

@@ -84,6 +84,54 @@ Describe "Resolve-DSCConfigurationData" {
         { Resolve-DSCConfigurationData -ConfigurationData $ConfigurationData } | Should Throw
     }
 
+    It "validates array parameter items against AllowedValues" {
+        $ConfigurationData = @{
+            Parameters = @{
+                ServerRoles = @{
+                    Type = "array"
+                    Value = @(
+                        "WebFrontEnd",
+                        "Application"
+                    )
+                    AllowedValues = @(
+                        "WebFrontEnd",
+                        "Application",
+                        "Search"
+                    )
+                }
+            }
+            Resources = @{
+                Roles = "[parameters('ServerRoles')]"
+            }
+        }
+
+        $Result = Resolve-DSCConfigurationData -ConfigurationData $ConfigurationData
+
+        $Result.Resources.Roles[0] | Should Be "WebFrontEnd"
+        $Result.Resources.Roles[1] | Should Be "Application"
+    }
+
+    It "throws when an array parameter item is not listed in AllowedValues" {
+        $ConfigurationData = @{
+            Parameters = @{
+                ServerRoles = @{
+                    Type = "array"
+                    Value = @(
+                        "WebFrontEnd",
+                        "InvalidRole"
+                    )
+                    AllowedValues = @(
+                        "WebFrontEnd",
+                        "Application",
+                        "Search"
+                    )
+                }
+            }
+        }
+
+        { Resolve-DSCConfigurationData -ConfigurationData $ConfigurationData } | Should Throw
+    }
+
     It "validates required parameters" {
         $ConfigurationData = @{
             Parameters = @{
@@ -124,6 +172,107 @@ Describe "Resolve-DSCConfigurationData" {
         { Resolve-DSCConfigurationData -ConfigurationData $ConfigurationData } | Should Throw
     }
 
+    It "validates supported parameter types" {
+        $ConfigurationData = @{
+            Parameters = @{
+                Name = @{
+                    Type = "string"
+                    Value = "SharePoint"
+                }
+                Port = @{
+                    Type = "int"
+                    Value = 1433
+                }
+                Enabled = @{
+                    Type = "bool"
+                    Value = $true
+                }
+                Roles = @{
+                    Type = "array"
+                    Value = @(
+                        "WebFrontEnd",
+                        "Application"
+                    )
+                }
+                SecretReference = @{
+                    Type = "secureString"
+                    Value = @{
+                        SecretName = "SharePointFarmPassphrase"
+                    }
+                    Sensitive = $true
+                }
+                CredentialReference = @{
+                    Type = "credential"
+                    Value = @{
+                        CredentialName = "SharePointSetup"
+                    }
+                    Sensitive = $true
+                }
+            }
+            Resources = @{
+                Name = "[parameters('Name')]"
+                Port = "[parameters('Port')]"
+                Enabled = "[parameters('Enabled')]"
+                RoleCount = "[length(parameters('Roles'))]"
+            }
+        }
+
+        $Result = Resolve-DSCConfigurationData -ConfigurationData $ConfigurationData
+
+        $Result.Resources.Name | Should Be "SharePoint"
+        $Result.Resources.Port | Should Be 1433
+        $Result.Resources.Enabled | Should Be $true
+        $Result.Resources.RoleCount | Should Be 2
+    }
+
+    It "throws when parameter type validation fails" {
+        $ConfigurationData = @{
+            Parameters = @{
+                Port = @{
+                    Type = "int"
+                    Value = "1433"
+                }
+            }
+        }
+
+        { Resolve-DSCConfigurationData -ConfigurationData $ConfigurationData } | Should Throw
+    }
+
+    It "validates numeric ranges" {
+        $ConfigurationData = @{
+            Parameters = @{
+                Port = @{
+                    Type = "int"
+                    Value = 1433
+                    MinValue = 1
+                    MaxValue = 65535
+                }
+            }
+            Resources = @{
+                Port = "[parameters('Port')]"
+            }
+        }
+
+        $Result = Resolve-DSCConfigurationData -ConfigurationData $ConfigurationData
+
+        $Result.Resources.Port | Should Be 1433
+    }
+
+    It "throws when numeric range validation fails" {
+        $ConfigurationData = @{
+            Parameters = @{
+                Port = @{
+                    Type = "int"
+                    Value = 70000
+                    MinValue = 1
+                    MaxValue = 65535
+                }
+            }
+        }
+
+        { Resolve-DSCConfigurationData -ConfigurationData $ConfigurationData } | Should Throw
+    }
+
     It "supports localized deprecated parameter messages" {
         $ConfigurationData = @{
             Parameters = @{