Test-FileHash.ps1

[CmdletBinding()]
param (
    [Parameter(Mandatory)]
    [string] $Path,

    [Parameter(Mandatory)]
    [string] $Hash,

    [ValidateSet("SHA1", "SHA256", "SHA512")]
    [string] $Algorithm = "SHA256"
)

[string] $ActualHash = (Get-FileHash -Path $Path -Algorithm $Algorithm).Hash
Write-Debug "ActualHash = $ActualHash"

[bool] $Match = $ActualHash.Equals($Hash, [System.StringComparison]::InvariantCultureIgnoreCase)
Write-Debug "Match = $Match"

Write-Output $Match