Functions/Test-PerformanceCounterCategory.ps1

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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

function Test-PerformanceCounterCategory
{
    <#
    .SYNOPSIS
    Tests if a performance counter category exists.
 
    .DESCRIPTION
    Returns `True` if category `CategoryName` exists. `False` if it does not exist.
 
    .EXAMPLE
    Test-PerformanceCounterCategory -CategoryName 'ToyotaCamry'
 
    Returns `True` if the `ToyotaCamry` performance counter category exists. `False` if the category doesn't exist.
    #>

    [CmdletBinding()]
    param(
        [Parameter(Mandatory=$true)]
        [string]
        # The name of the cateogry whose existence to check.
        $CategoryName
    )
    
    Set-StrictMode -Version 'Latest'

    Use-CallerPreference -Cmdlet $PSCmdlet -Session $ExecutionContext.SessionState

    return [Diagnostics.PerformanceCounterCategory]::Exists( $CategoryName )
}