PowerShell - How to tell if two objects are identical

Question

Let\'s say you have two objects that are identical (meaning they have the same properties and the same values respectively).

How do you test for equality?

Answer 1

I'd suggest using Compare-Object for this task:

Function Test-Objects
{
    Param(
    [Parameter(Mandatory,Position=0)]
    [PSCustomObject]$Obj1,
    [Parameter(Mandatory,Position=1)]
    [PSCustomObject]$Obj2
    )

    [Void](Compare-Object -ReferenceObject $Obj1.PSObject.Properties -DifferenceObject.PSObject.Properties $Obj2 -OutVariable 'Test')

    ## Tests whether they are equal, no return = success
    If (-not $Test)
    {
        $True
    }
    Else
    {
        $False
    }
}

---

PS C:\> $Obj1 = [PSCustomObject]@{
    Property1 = 'Value1'
    Property2 = 'Value2'
    Property3 = 'Value3'
    Property4 = 'Value4'
    Property5 = 'Value5'
}
PS C:\> $Obj2 = [PSCustomObject]@{
    Property1 = 'Value1'
    Property2 = 'Value2'
    Property3 = 'Value3'
    Property4 = 'Value4'
    Property5 = 'Value5'
}
PS C:\> Test-Objects $Obj1 $Obj2
True
PS C:\> $Obj2 | Add-Member -MemberType 'NoteProperty' -Name 'Prop6' -Value 'Value6'
PS C:\> Test-Objects $Obj1 $Obj2
False