OutputTypeParamSet.ps1

function Test-ParameterSet
{
    [CmdletBinding(DefaultParameterSetName = 'Default')]
    [OutputType([boolean], ParameterSetName = 'Test')]
    [OutputType([PSObject], ParameterSetName = 'Default')]
    param
    (
        [parameter(Mandatory = $true)]
        [System.String]$Param1,

        [parameter(Mandatory = $true)]
        [System.String]$Param2,

        [System.String]$Param3,                

        [System.UInt32]$Param4,
        
        [Parameter(ParameterSetName = 'Test')]
        [switch]$Test
    )

    $PSCmdlet.ParameterSetName
}

function Test-ParameterSet
{
    [CmdletBinding(DefaultParameterSetName = 'Default')]
    [OutputType([boolean], ParameterSetName = 'Test')]
    [OutputType([PSObject], ParameterSetName = 'Default')]
    [OutputType([psobject])]
    param
    (
        [parameter(Mandatory = $true)]
        [System.String]$Param1,

        [parameter(Mandatory = $true)]
        [System.String]$Param2,

        [System.String]$Param3,                

        [System.UInt32]$Param4,
        
        [Parameter(ParameterSetName = 'Test')]
        [switch]$Test
    )

    $PSCmdlet.ParameterSetName
}

function Test-ParameterSet
{
    [CmdletBinding()]
    [OutputType([boolean], ParameterSetName = 'Test')]
    [OutputType([psobject])]
    param
    (
        [parameter(Mandatory = $true)]
        [System.String]$Param1,

        [parameter(Mandatory = $true)]
        [System.String]$Param2,

        [System.String]$Param3,                

        [System.UInt32]$Param4,
        
        [Parameter(ParameterSetName = 'Test')]
        [switch]$Test
    )

    $PSCmdlet.ParameterSetName
}