diff --git a/test/powershell/Add-Member.Tests.ps1 b/test/powershell/Add-Member.Tests.ps1
index 31bae7d335..b78f8c7dd9 100644
--- a/test/powershell/Add-Member.Tests.ps1
+++ b/test/powershell/Add-Member.Tests.ps1
@@ -1,3 +1,283 @@
+Describe "Add-Member DRT Unit Tests" -Tags DRT{
+
+    It "Mandatory parameters should not be null nor empty" {
+        # when Name is null 
+        try 
+        {
+            Add-Member -Name $null 
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+
+        # when Name is empty            
+        try 
+        {
+            Add-Member -Name "" 
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "ParameterArgumentValidationErrorEmptyStringNotAllowed,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+
+        # when MemberType is null
+        try 
+        {
+            Add-Member -MemberType $null 
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+
+        # when MemberType is empty            
+        try 
+        {
+            Add-Member -MemberType "" 
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "CannotConvertArgumentNoMessage,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+
+        # when InputObject is null
+        try 
+        {
+            Add-Member -InputObject $null 
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+    }
+
+    # It only support on AliasProperty, ScriptProperty, CodeProperty and CodeMethod 
+    It "Should Not Have Value2" {
+        $memberTypesWhereV1CannotBeNull = "CodeMethod", "MemberSet", "PropertySet", "ScriptMethod", "NoteProperty" 
+        foreach ($memberType in $memberTypesWhereV1CannotBeNull)
+        {
+            try
+            {
+                Add-Member -InputObject a -memberType $memberType -Name Name -Value something -SecondValue somethingElse 
+                Throw "Execution OK"
+            }
+            catch{
+                $_.FullyQualifiedErrorId | Should Be "Value2ShouldNotBeSpecified,Microsoft.PowerShell.Commands.AddMemberCommand"
+            }
+        }
+    }
+
+    It "Cannot Add PS Property Or PS Method" {
+        $membersYouCannotAdd = "Method", "Property", "ParameterizedProperty"
+        foreach ($member in $membersYouCannotAdd)
+        {
+            try
+            {
+                Add-Member -InputObject a -memberType $member -Name Name  
+                Throw "Execution OK"
+            }
+            catch
+            {
+                $_.FullyQualifiedErrorId | Should Be "CannotAddMemberType,Microsoft.PowerShell.Commands.AddMemberCommand"
+                
+            }
+        }
+
+        try
+        {
+            Add-Member -InputObject a -memberType AnythingElse -Name Name  
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "CannotConvertArgumentNoMessage,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+        
+    }
+
+    It "Value1 And Value2 Should Not Both Null" {
+        $memberTypes = "CodeProperty", "ScriptProperty"
+        foreach ($memberType in $memberTypes)
+        {
+            try
+            {
+                Add-Member -memberType $memberType -Name PropertyName -Value $null -SecondValue $null -InputObject a
+                Throw "Execution OK"
+            }
+            catch
+            {
+                $_.FullyQualifiedErrorId | Should Be "Value1AndValue2AreNotBothNull,Microsoft.PowerShell.Commands.AddMemberCommand"
+            }
+        }
+        
+    }
+
+    It "Fail to add unexisting type" {
+        try
+        {
+            Add-Member -InputObject a -MemberType AliasProperty -Name Name -Value something -SecondValue unexistingType
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "InvalidCastFromStringToType,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+    }
+
+    It "Successful alias, no type" {
+        $results = Add-Member -InputObject a -MemberType AliasProperty -Name Cnt -Value Length -passthru
+        $results.Cnt.GetType().Name | Should Be 'Int32'
+        $results.Cnt | Should Be 1
+    }
+
+    It "Successful alias, with type" {
+        $results = add-member -InputObject a -MemberType AliasProperty -Name Cnt -Value Length -SecondValue String -passthru
+        $results.Cnt.GetType().Name | Should Be 'String'
+        $results.Cnt | Should Be '1'
+    }
+
+    It "CodeProperty Reference Wrong Type" {
+        try
+        {
+            add-member -InputObject a -MemberType CodeProperty -Name Name -Value something
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "ConvertToFinalInvalidCastException,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+    }
+
+    It "Empty Member Set Null Value1" {
+        $results = add-member -InputObject a -MemberType MemberSet -Name Name -Value $null -passthru
+        $results.Length | Should Be 1
+        $results.Name.a | Should BeNullOrEmpty 
+    }
+
+    It "Member Set With 1 Member" {
+        $members = new-object System.Collections.ObjectModel.Collection[System.Management.Automation.PSMemberInfo]
+        $n=new-object Management.Automation.PSNoteProperty a,1
+        $members.Add($n)
+        $r=add-member -InputObject a -MemberType MemberSet -Name Name -Value $members -passthru
+        $r.Name.a | Should Be '1'
+    }
+
+    It "MemberSet With Wrong Type For Value1" {
+        try
+        {
+            add-member -InputObject a -MemberType MemberSet -Name Name -Value ImNotACollection
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "ConvertToFinalInvalidCastException,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+    }
+
+    It "ScriptMethod Reference Wrong Type" {
+        try
+        {
+            add-member -InputObject a -MemberType ScriptMethod -Name Name -Value something
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "ConvertToFinalInvalidCastException,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+    }
+
+    It "Add ScriptMethod Success" {
+        $results = add-member -InputObject 'abc' -MemberType ScriptMethod -Name Name -Value {$this.length} -passthru
+        $results | Should Be abc
+        $results.Name() | Should Be 3
+    }
+
+    It "ScriptProperty Reference Wrong Type" {
+        try
+        {
+            add-member -InputObject a -MemberType ScriptProperty -Name Name -Value something
+            Throw "Execution OK"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be "ConvertToFinalInvalidCastException,Microsoft.PowerShell.Commands.AddMemberCommand"
+        }
+    }
+
+    It "Add ScriptProperty Success" {
+        set-alias ScriptPropertyTestAlias dir
+        $al=(get-alias ScriptPropertyTestAlias)
+        $al.Description="MyDescription"
+        $al | add-member -MemberType ScriptProperty -Name NewDescription -Value {$this.Description} -SecondValue {$this.Description=$args[0]} 
+        $al.NewDescription | Should Be 'MyDescription' 
+        $al.NewDescription = "some description"
+        $al.NewDescription | Should Be 'some description'        
+    }
+
+    It "Add TypeName MemberSet Success" {
+        $a = 'string' | add-member -MemberType NoteProperty -Name TestNote -Value Any -TypeName MyType -passthru 
+        $a.PSTypeNames[0] | Should Be MyType 
+    }
+
+    It "Add TypeName Existing Name Success" {
+        $a = 'string' | add-member -TypeName System.Object -passthru
+        $a.PSTypeNames[0] | Should Be System.Object 
+    }
+
+    It "Add Single Note To Array" {
+        $a=1,2,3
+        $a = Add-Member -InputObject $a -MemberType NoteProperty -Name Name -Value Value -PassThru
+        $a.Name | Should Be Value
+    }
+
+    It "Add Multiple Note Members" {
+        $obj=new-object psobject 
+        $hash=@{Name='Name';TestInt=1;TestNull=$null}
+        add-member -InputObject $obj $hash 
+        $obj.Name | Should Be 'Name'
+        $obj.TestInt | Should Be 1
+        $obj.TestNull | Should BeNullOrEmpty 
+    }
+
+    It "Add Multiple Note With TypeName" {
+        $obj=new-object psobject 
+        $hash=@{Name='Name';TestInt=1;TestNull=$null} 
+        $obj = add-member -InputObject $obj $hash -TypeName MyType -Passthru
+        $obj.PSTypeNames[0] | Should Be MyType
+    }
+
+    It "Add Multiple Members With Force" {
+        $obj=new-object psobject 
+        $hash=@{TestNote='hello'} 
+        $obj | Add-Member -MemberType NoteProperty -Name TestNote -Value 1
+        $obj | add-member $hash -force 
+        $obj.TestNote | Should Be 'hello'
+    }
+
+    It "Simplified Add-Member should support using 'Property' as the NoteProperty member name" {
+        $results = add-member -InputObject a property Any -passthru
+        $results.property | Should Be 'Any'
+
+        $results = add-member -InputObject a Method Any -passthru
+        $results.Method | Should Be 'Any'
+
+        $results = add-member -InputObject a 23 Any -passthru
+        $results.23 | Should Be 'Any'
+
+        $results = add-member -InputObject a 8 np Any -passthru
+        $results.np | Should Be 'Any'
+
+        $results = add-member -InputObject a 16 sp {1+1} -passthru
+        $results.sp | Should Be 2
+    }
+}
+
 Describe "Add-Member" {
 
     It "should be able to see a newly added member of an object" {